Chapter 7 – Glassing Fuselage Exterior

Chapter 7 – Fuselage Exterior

27 May 2012 — I pulled the peel ply from yesterday’s layups (corner 1-ply BID tapes discussed at the end of Chapter 6).  Overall, everything looked great. I marked some punch list items and I’ll probably have to add another BID tape a place or two, but it all looks real solid.

Fuselage Punch List - Instr. Panel

I’ve had an observer while I’ve been working the past few hours:

The "Observer"

I think he’s been whispering, “Maybe you should have installed the wood block for the landing brake before you installed the fuselage bottom . . .”   (shut up!)  Oh, well.

I gathered and prepped all the tools I thought I would need for carving & shaping the fuselage bottom.  This is big, and I don’t want to muck it up!  So I’ve reread the plans about 5 times just to make sure I know EXACTLY what I’m doing . . .  AND I’m 100% sure that I THINK I know what I’m doing!!  So I dove in!

Chapter 7 - Step 1 Prep

Chap 7 Step 1 - Carving the fuselage shape

I started sanding and shaping the fuselage at the bottom corners to turn it from something that is basically square, and give it some curves.  This took quite a while.  I had to readjust the templates a number of times. Finally, to maintain a baseline on the templates I mounted a small level bubble on them so I could always start in the same plane at each point along the corner edge.

Chap 7 Step 1 - Fuselage Taking Shape

Chap 7 Step 1 - Fuselage's taking shape!

Chap 7 Step 1 - Before & AfterChap 7 Step 1 - Right side almost done!

I got about 80% of the right-hand side and about 40% of the left-hand side (remember, it’s upside down) completed before I called it a night.

•••

28 May 2012 — I started off my Long-EZ build today by reviewing the early Canard Pusher Builder’s Hints and the Landing Brake plans for about 2 hours.

Then, because apparently it was Sanding Day (I hear Canardians are pushing for that to become a national holiday!), I sanded the bottom corners of the fuselage to shape.  The final result may have just a little bit less foam taken off at the corners than the plans show, but the lower corners follow very closely to the template and have a good flow.

Chap 7 - Shaping the fuselage

Chap 7 - Shaping the fuselage

Chap 7 - Shaping the fuselage

Shaping the top of the fuselage at the longerons, in time & effort, was comparatively EZ.

Chap 7 - Shaping the fuselage sides

Chap 7 - Shaping the upper fuselage

To be honest, I don’t really care for the shape of the top template… it seems a little too flat and could be just a bit more rounded.  But maybe that’s what some folks say in general about the shape of the Long-EZ fuselage!

Chap 7 - Shaping the fuselage

Chap 7 - Shaping the upper longeron

I also weighed the fuselage today.  Mine weighs 46.6 lbs vs. Mike Melvill’s 41 lbs at this stage.  Considering the extra glass, micro and flox I added both on the sides & bottom during the repairs, and the fact my rear longerons are a just a tad bit thicker, I’ll take the 5.6 lbs heavier fuselage and press on!  Also, I haven’t given the fuselage tapes and repairs a thorough sanding yet, so that will take at least a little weight off.

And unrelated to the fuselage, once I finished shaping the fuselage I drug out all my raw 2024 aluminum pieces and marked up all the various pieces and parts that would come out of them.  It was kind of like putting a puzzle together, but I had fun trying to plan the use the entire length of aluminum while minimizing any significant leftover pieces.

•••

29 May 2012 — After a power nap I reviewed Chapter 7 of the plans on skinning the fuselage.  I took a hard look at the strake cutouts as well (the holes on the insides of the fuselage that allow access into the “wings” to store baggage, etc.).   I hauled the plans, A-pages and firewall out to my shop to mull over my next steps.  I mounted the firewall and in doing so, noticed a few more hairline cracks developing in the foam fuselage at the aft end of each side.  I need to get the fuselage glassed soon!  I checked the firewall: it fits well and is square.

One thing that is not fully captured on this site is the planning steps that go into each build action.  I have been talking to a number of highly experienced canard builders, and although they quite often don’t agree with each other on build methods or project mods, I take what they have to say with a lot of weight and consideration. I also understand that if I do anything outside of the guidelines of the plans, it will quite often be met with a fair amount of wailing and gnashing of teeth!  In light of this, one modification that I looked at and assessed in-depth tonight was imbedding the rudder Nylaflow tubing into the fuselage sides.  It looks quite doable.

What is the advantage of doing this?  My rudder cables will be taking a more direct route out to the rudders from the rudder/brake pedals.  They will travel in-line straight from the peddle down the side of the fuselage, make a shallow ‘S’ curve and run near the top longeron through the Center Section Spar (again, no fibers will be cut, just gently gapped about 3/16″ for Nylaflow clearance) and then turn out towards the rudders.  Another plus is that it cleans up the interior of the fuselage and allows me to work on the rudder cable conduits on the outside of the fuselage vs. the inside, in pretty much the same manner as how the conduit is run through each wing.

I spent about an hour and a half mocking up the tubing path and how it corresponded with the strake cutouts, using as gentle of curves as possible.

•••

30 May 2012 — I finished sanding the fuselage near the Main Gear extrusion bolts, and the Firewall junction with the CS (Center Section) Spar both top & bottom.  I then sanded the top & bottom longerons to match the Firewall outline.

I checked that the fuselage was level and straight.  I also double-checked the firewall positioning and confirmed that it was level, straight and square.

My last action of the evening was finding and marking the fuselage centerline.

•••

31 May 2012 — You might be asking yourself, what the heck is “Section VI?” when the only references so far have been to the chapters within the build plans.  Yeah, well, I think a lot of us builders asked that same question at one point as well.  And, yes, the Section VI plans are a bit of an anomaly.  These plans cover the construction of the Landing Brake and actually have their origins from the Vari-Eze plans (it even states Vari-Eze Section VI Plans on the front page).  They are referred to in Chapter 9, the Main Gear plans.  Thus… mystery solved!

I spent over an hour studying the Section VI plans to determine what applied and what is different since I’m using Jack Wilhelmson’s Electric Landing Brake Actuator.  By using this actuator it wiped out a considerable amount of the Section VI plans.

The reason why the Landing Brake comes into play at this point is because a layer of tape—which a glass layup can’t bond to—must be laid out onto the surface of the fuselage foam in the shape of the landing brake BEFORE the fuselage is glassed.  Since I marked out the fuselage CenterLine last night, it was simply a matter of finding the fore & aft measurement as to where to locate the Landing Brake.  After I found the forward location of the fuselage I marked up the outline of the Landing Brake.  FYI – my Landing Brake is 0.94″ forward from stock plans due to my moving my front seat that much forward to assist the shift in CG since I plan on using a heavier IO-320 engine.

Section VI Plans - Prepping the Landing Brake

Section VI Plans - Landing Brake

Section VI Plans - Landing Brake Outline

Section VI Plans - Landing Brake Prep

Section VI Plans - Landing Brake PrepAfter drawing out and covering the Landing Brake area with tape, I finished the final sanding & shaping of the foam and wood longerons at the aft end of fuselage.

I then cut out and shaped the rear cover for the Main Gear cover (its moniker is the “Hell Hole” cover).  This is just the initial shaping of this cover for this space.  I’ll refine it later after the Main Gear is mounted.

"Hell Hole" (Landing Brake Area) Cover Shaping

Hell Hole Cover Shaping

•••

1 June 2012 — I got a late start tonight because I went to the German equivalent of Lowe’s, Praktiker, versus the German version of Home Depot, Hornbach.  And yes, they are even Blue vs Orange.  By the time I got home it was past 10 PM and I wasn’t going to test the local noise ordinance, so I went into planning mode.

I planned out, and then drew the lines for the Nylaflow rudder cable conduit runs on the side of the fuselage.  I then traced the ‘S’ curve onto trace paper for templates.  I had some spare particle board from a cheap shoe rack that was damaged in the move, so I used those pieces to glue the templates to using 3M’s 77 spray adhesive.  I would cut those out first thing the next day (Saturday).

Since I would be in wood working mode, I also quickly designed and set up cuts on some particle board I had shipped over to make a UNI glass stand to use when glassing the fuselage.  Once the stand is built, I can simply bring a whole roll of UNI out to the garage and cut right off the roll as I need it.

Knowing that I was going to be installing the brackets for the seat belts in the not-too-distant future, I marked up a 2024T3 aluminum angle piece for all 4 seatbelt brackets for the interior of the fuselage.  I planned to cut those as soon as I got the chance.

Lastly, in prep for the upcoming fuselage skinning, I put together a small metal workbench about 20″ deep by about 30″ wide with a top bench surface and two shelves for my garage shop epoxy station.  The time was coming where I would need to make a lot of epoxy, micro and flox without hauling it out to the garage from the shop inside the house.

•••

2 June 2012 — Today was an amazingly busy day for the Long-EZ project.

I made the initial cuts on the seat belt aluminum angle extrusion, and also planned and marked the bolt hole positions for the seatbelt/bracket attachments.

I dismantled the Fuselage Bottom’s sled and reclaimed the three 2x3s for the UNI glass stand that I designed last night.  Then I went to the woodshop on Ramstein to cut the wood for the UNI glass stand.  Being an avid wanna-be consolidator, or maybe opportunist, I also cut 4 each 1″x1″x3″ Spruce blocks for the CS spar imbedded hard points (these will come into play A LONG TIME from now!).  I then cut some 1/4″ plywood into 2.4″ and 2.5″ strips for some future templates.

After yet another BAD experience of dealing with the ‘Know-it-all Nazis’ at the base wood shop, I decided I’d had enough.  Besides being a pilot, my Dad was both a contractor and a cabinet maker, so I grew up on just about every wood-working tool known to man.  And these wood shop guys on Ramstein treat every person in their presence as if it’s the first time they’ve ever seen a power tool. Thus, although I have crates of power tools, saws, etc. in storage somewhere in Virginia, I marched my happy butt over to the Base Exchange and bought a small 7-1/4″ chop saw to lessen my interface with those knucklefutzes, and thus lower my build time, decrease my angst, and maintain my sanity!

I went to the German version of, oh, we’ll call it True Value Hardware, Toom, and bought some Dremel bits and then returned home.

Ok, back to work!

I drilled all the holes in the seat belt aluminum angle extrusions, and then cut one bracket completely out and filed down the edges.  Although not a perfect specimen of machining, it looked pretty good!  (Pardon the pic, I know it’s quite blurry)

Chapter 8 - First prototype seat belt bracket (blurry)

I then went from metal “machining” mode into woodworking mode and cut out the Dremel Tool templates—for routing the rudder cable Nylaflow conduit channel ‘S’ curve—out of the scrap particle board.

Chap 7 Mod - Rudder cable conduit channel

Chap 7 Mod - Curve templates for rudder cable conduit

 

 

Since I had all my woodworking stuff out, I decided to knock out the UNI glass stand.  I cut out a few more pieces (I did all the ‘heavy-lifting’ cutting at the base wood shop) and then finished building the UNI glass stand.

Chapter 7 - UNI Glass Dispenser (pardon my build mess!)

I took a break and talked to my buddy Marco to confirm some ideas and measurements (Steve Volovsek’s strake elbow-room mod, F22 center post width, Landing Brake LB22 & LB 23 dimensions, etc.).  After our 1-hour long “strategy” session, it was time to get back to work.

I set templates and then set up the Dremel tool.  After double, triple, and quadruple checking everything, I pulled the trigger (literally! ha!) and Dremelled the channel along the Left side of the fuselage for the rudder cable conduit (Nylaflow).

Chap 7 Mod - Dremelling rudder channel

Chap 7 Mod - Rudder cable conduit channel

Chap 7 Mod - Rudder cable conduit channel

Chap 7 Mod - Rudder cable conduit channelChap 7 Mod - Rudder cable conduit channel

Chap 7 Mod - Rudder cable conduit channel

Chap 7 Mod - Rudder cable conduit channel

I also carefully drilled the holes at each end of the fuselage:  AFT END – For the conduit to continue through the CS Spar and curve towards the outboard winglets . . .

Chap 7 Mod - Rudder cable conduit channel

Chap 7 Mod - Rudder cable conduit channel

Chap 7 Mod - Rudder cable conduit channel

Chap 7 Mod - Rudder cable conduit channel

FWD END – To continue into the forward fuselage near to where the rudder/brake pedals will be positioned.

IMG_0032 (2)

Chap 7 Mod - Rudder cable conduit channel

Although Nylaflow is some tough stuff, with a little bit sharper bends at the ‘S’ curves compared to anywhere else in the rudder cable conduit system, I decided I would reinforce it with some metal.  I didn’t have any aluminum tubing, so the next best thing I could find locally was brass (at least that’s what it translated to!).  I cut the brass tubing into two 9-7/8″ lengths for each side of the fuselage.  I then chamfered the openings at each end.  I cut 4″ of each end off of the 30″ long spring used for the trim system and set those pieces aside.  I then used the remaining middle 22″ for shaping the brass tubing.  It worked like a champ and didn’t deform the tubing at all.

Chap 7 Mod - Rudder cable conduit channel

Once the brass tubing was bent and in place around the Nylaflow conduit, I micro’d the entire run of Nyloflow and brass tubing and held it into place with toothpicks.

Chap 7 Mod - Rudder cable conduit channel

Chap 7 Mod - Rudder cable conduit channel

Also, since I had the micro out, and still trying my hand at that efficiency stuff, I micro’d some foam chips into the main gear extrusion bolt holes in the foam.

Chapter 7 - Filling gear bolt holes in foam

•••

3 June 2012 — I checked the micro that’s now embedding the rudder cable conduit that I laid into the channel along the Left-side fuselage last night.  I knocked off a couple of errant spots of micro that intruded into the airspace above the surface of the foam.  I also checked the foam chips micro’d into the main gear bolt holes and snapped a picture of them after I cleaned up the area and sanded down the bolt hole inserts.

It all looks really good.  The only downside is that 3 of the 4 pictures for today’s post are of the Left side of the fuselage.  Regardless, the Right side was merely a repeat of the left.

Chap 7 Mod - Rudder cable conduit channel

Chap 7 Mod - Rudder cable conduit channel

Chapter 7 - Main gear bolt holes on outside foam

For the Right-side fuselage I simply transferred the template over and used the Dremel in the same fashion for the Nylaflow rudder cable channel.  Also like the Left fuselage side, I drilled the fore & aft holes, and then laid in 128″ of Nyloflow conduit, with two 9-7/8″ brass tubing sleeves installed at the ‘S’ curve section of my Nylaflow run.

Chap 7 Mod - R-side rudder cable conduit channel

In prepping for the micro, I made foam cylindrical plugs vs. the plans called-for ‘foam chips’ for covering the main gear bolt holes in the outer fuselage foam (no pic).

I then micro’d in the foam plugs for the main gear bolt holes and the Nylaflow tubing into the rudder cable conduit channel along with the 2 brass tube sleeves.  Again, I held the conduit in place with toothpicks while the micro cured.

After 2-3 hours, I removed the toothpicks that were imbedded into the micro (much easier BTW when the micro hasn’t fully cured!)

Then in preparation for yet another mod, I drilled two holes along the bottom fuselage’s centerline, one fore and one aft of the landing brake, to install two threaded aluminum inserts so that I can mount a long, straight bar that will denote my extended centerline when I build my nose and my strakes, and also when I rig my wings and canard.  I also threw one of these lightweight inserts into the fuselage sidewall, just aft of the upper pilot’s seat, to provide for a future threaded sidewall mounting hard point.

•••

4 June 2012 — Today I removed the few remaining toothpicks holding the Nylaflow conduit in place.  I trimmed the rudder cable channel of any excess & high micro, and then razor cut any excess foam & micro from the main gear extrusion bolt hole plugs.  I then sanded the newly emplaced foam/micro bolt hole covers to finish.

On the fuselage bottom I used 2 long AN3 (3/16″) bolts threaded into 2 aluminum threaded inserts (Note:  These inserts, or ‘bungs’, are also used to mount the bomb-looking baggage pods to the wings.) that will be mounted into the fuselage foam on the underside fuselage centerline.  FYI – The Cozy Girrrls sell these threaded aluminum inserts.

Chap 7 Mod - Installing bottom fuselage CL mounts

Chap 7 Mod - Installing bottom fuselage CL mounts

I then taped the 2 bolts to a yardstick and then micro’d the 2 threaded aluminum inserts into two holes that I had already placed and drilled in the fuselage’s centerline—one fore and one aft of the landing brake.  Since there is a slight curve to the fuselage from fore to aft, I weighed down each end of the yard stick and then rechecked that the bolts were 90° to the fuselage.  Now “90° to the fuselage” with a slight curve means that they are not exactly parallel: the curve will create about a 0.5° to 2° offset between the bolts.  This offset will be manageable and the impact negligible.

Chap 7 Mod - Installing bottom CL mounts

Chap 7 Mod - Installing bottom CL mountChap 7 Mod - Installing bottom CL mounts

Chap 7 Mod - Installing bottom fuselage CL mountsChap 7 Mod - Installing bottom fuselage CL mounts

As I was preparing for the installation of the bottom centerline threaded inserts, I also prepped the right inside fuselage wall so that I could have a threaded hard point mounted inside the fuselage wall for mounting a rear seat component, mounting tab, etc.  This is located just behind the front pilot’s seat on the right side:

Chap 7 Mod - Installing fuselage sidewall mount

The pics below show the outside foam plug, with the micro (and a bit of flox) curing.

•••

5 June 2012 — Before it got too late at night (that noise ordinance thing again!) I started out the evening by cutting 4 pieces of 1/4″ Finnish Birch plywood for the hard points that will be glassed into each side of the interior fuselage corners where the seatbelt brackets will mount.  There is a 7-ply BID layup that goes over these 1/4″ ply hard points, so the seatbelt mounts are designed impressively robust & strong.  Since the pads that will be made up of the 7-ply BID aren’t that large, I scrounged together some scrap BID to throw into some “Poor Man’s” pre-preg set-ups.  Once I got the set-ups ready, I set them aside to use in the next few days.  (Sorry, no pics just yet)

I then checked and cleaned up the 3 threaded bungs: 2 BDCL and 1 interior R-side aft cockpit.  I double-checked the fit & finish of the bolt going into the Right side fuselage wall insert and it fit great and threaded in/out fine.

I marked and drilled out a foam hole on the Left side to mount an insert on the interior fuselage wall opposite the one on the right.

Chap 7 Mod - Left fuselage sidewall thread mount

I whipped up some micro and micro’d in the Left fuselage wall threaded insert (from the outside of the fuselage).

Since I had a fair amount of micro left over, I also filled in some fairly deep gouges in various places on the fuselage.

•••

6 June 2012 — Today I have at least one more controversial mod to make.  I’ve been discussing these with a number of people, so here goes.

First, I’m planning on running my brake lines down the outside of the fuselage, imbedded just under the skin, like I did my rudder cable conduits.  The only difference is that the brake lines would A) run along the bottom of the fuselage, one on each side of the landing brake, and B) be encased in Nylaflow for their entire journey through the length of the fuselage.  Since I’m running 1/8″ aluminum brake lines, the ability to withstand pressure is high and I have a security blanket, almost literally, with the Nylaflow.  [Note: I was originally going to go with Dick Rutan’s idea of stainless steel: but too hard to bend & also just found out the wall thickness is too great—so it won’t allow enough brake fluid to travel back & forth enough to recharge the brakes].

I’ve traced this out, and reviewed the mechanical layout a dozen times, as well as assessed the pros & cons, and I like the idea a lot.  It means by the time I’m done skinning the outside of the fuselage, I’ll  have both my rudder cable conduit and my brake lines “pre-run” cleanly without having to get into the inner bowels of the fuselage.  Plus, I’ll essentially have one long brake line run on each side from the rudder/brake pedal (Point A) to the brake assembly (Point B) with no connectors in between (unless I choose to).

From my Bomb Squad days I like to worse-case-scenario things.  I think any brake fluid leaks will be mitigated greatly in this dual-layered system.  If something does go wrong, then the answer to peoples’ “what about maintenance?” question means that worse case I would snip the end of each line and run the brake lines per plans inside the cockpit and suffer a small weight penalty.  In fact, my first act today was planning out & drawing the runs for the brake lines.  Ok, enough on internal brake lines.

The next mod is a result of one of those head-scratching moments all of us builders have reading the plans.  I didn’t understand why we skin the fuselage, and then turn around and drill holes through the skin to mount the seatbelt brackets.  I read, looked at the diagrams, reread the plans and it just didn’t seem right to me.  I Googled it, and then hit the blogs and the phones.  I talked to my building mentor, Dale Martin, and others and still didn’t have a good feel for why the build sequence between the seatbelt bracket mounting and skinning seemed reversed (for the record, Dale suggested I follow the plans).

I finally made a command decision. Not wanting to drill through perfectly good glassed fuselage skin, I decided to mount my seatbelt brackets before I glassed the fuselage. Thus, below you will see exactly that: the start of my seatbelt mounting.

First, I finished cutting & sanding the 1/4″ plywood seatbelt hard points and then mocked them up for install.  They looked good so I floxed them in place.  I then wetted out the 7-ply BID “Poor Man’s” pre-preg setups that I had made up the night before, and then respectively glassed in the 4 seatbelt hardpoints with 7 plies of BID on each one.  I then covered these 7-ply layups with peel ply and overlapped it onto the surrounding glass to get a nice, smooth transition.  All the layups looked good, so I left them to cure.

Chap 8 - Seatbelt mounts (Ch 7 Mod)

The pic below just shows the front end of the fuselage with the new rudder cable conduits coming out the front.  I just gave my fuselage fangs!  How cool is that?!

Chap 7 Mod - Rudder conduit imbedded in fuselageFinally, to wrap up some of the tasks over the last couple of days: when I attempted to drill the final hole for the fuselage Left-sidewall thread insert, the drill must have just barely caught the soft aluminum, because when I inserted the bolt it caught and I put just enough force on it to strip it out.  So I drilled it out, will reinsert another one, and will redouble my efforts to be more vigilant and careful!

•••

7 June 2012 — Today was a non-building day.  I focused on getting a bunch of items that I received in an Aircraft Spruce shipment inventoried, organized and stored, along with some other items that needed the same.

I try not to go too long in-between entering everything I order into my tracking spreadsheet.   In the spreadsheet I track every item that I’ve bought, and I have a list of every item I plan to buy & schedule of what timeframe I’m going to buy it (that’s the project manager in me coming out!).  So, in my spreadsheet I list everything under 6 main categories:

  • Bought
  • Phase I – Materials (required for building: wood, metal, foam, etc)
  • Phase II – Parts (metal aircraft parts, hinges, etc)
  • Phase III – Major Components/Finish (electrical, engine, prop, avionics, paint, etc)
  • Phase IV – Post Build Items (AC Cover, Anti-static spray, gust locks, etc)
  • Tools

After my inventory spree, I drew out my initial plans for lo-vaccing the armrests and rollover assembly.

I also checked the 7-ply BID layups on the seatbelt bracket hard points and they looked good so I pulled the peel ply off and called it a night.

•••

8 June 2012 — I drove down to Aircraft Spruce EU in Bretten,Germany, about an hour and a half from my house, to pick up 28′ of 1/8″ 3003-0 aluminum tubing for my brake lines.  I also picked up some Alodine, a 3′ hinge and a plastic eyeball vent.

When I returned to the house, I finished the other 3 angled aluminum seatbelt brackets and drilled all the holes to 1/4″.

8june I then lined up and drilled the seatbelt bracket mounting holes into the corners of the fuselage at each of the 4 seatbelt 7-ply BID/1/4″ plywood hard points.  Note that in the pics below that the screws are simply inserted into both the seatbelt bracket and hardpoint holes for spacing purposes only, since the screws are installed backwards—as you can tell by the screw head being on the inside of the fuselage vs. the outside.

Chap 8 - Seatbelt Mounts (Chap 7 Mod)Chap 8 - Seatbelt Mounts (Chap 7 Mod)

Chap 8 - Seatbelt Mounts (Chap 7 Mod)

Chap 8 - Seatbelt Mounts (Chap 7 Mod)

•••

9 June 2012 — In the same fashion as the rudder cable conduit channels on the sides of the fuselage, I Dremelled a channel down each side of the underside of the fuselage, left & right of the Landing Brake, to run the brake lines internal to the fuselage glass & foam.  This is another significant departure from the plans since the brake lines aren’t normally installed until chapter 15, but for all the reasons I spelled out earlier I wanted to get this mod knocked out.

Also, just as a quick mention, the plans still spell out how to install the master brake cylinders on the Firewall in the engine compartment.  Ever since Debbie Iwatate’s groundbreaking mod back in 1982’ish to move the master brake cylinders forward to the rudder pedals, it doesn’t seem like there are too many builders who still mount them in back.

After using the Dremel to rout the two channels on the fuselage bottom, I used the #10 long drill bit (again) to drill holes at the front side of the fuselage and at the aft end of the fuselage to bring the brake lines back into the cockpit.

Chap 7 Mod - Running brakes lines in bottom fuselage

Chap 7 Mod - Running brakes lines in bottom fuselage

Chap 7 Mod - Running brakes lines in bottom fuselageChap 7 Mod - Running brakes lines in bottom fuselage

Chap 7 Mod - Running brakes lines in bottom fuselage

 

 

 

 

 

 

 

 

 

For each side, I took a 14 ft length of 1/8″ 3003-0 Aluminum tubing and inserted it into 88″ of a 3/16″ Nylaflow sleeve. Approximately 22″ of the aluminum tubing will stick out of the front the fuselage on each side.

Chap 7 Mod - Running brakes lines in bottom fuselage

Chap 7 Mod - Running brakes lines in bottom fuselage

About 1″ of the tubing, on initial entry to the interior fuselage, coming in from the exterior side of the fuselage is covered in Nylaflow as well.

Chap 7 Mod - Running brakes lines in bottom fuselage

After I got everything set, I micro’d the Nylaflow/aluminum tubing into the channels on both sides of the fuselage and secured the conduits in place with toothpicks.

Chap 7 Mod - Running brakes lines in bottom fuselage

Chap 7 Mod - Running brakes lines in bottom fuselage

Chap 7 Mod - Running brakes lines in bottom fuselage

 

 

 

After about 8 hours I pulled out the toothpicks.  The brake line conduits looked good and were secured nicely down into the bottom of each channel.

 

Chapter 8 Step 6 – Installing Seatbelt Brackets

On to seatbelts! In yet another discussion with Dale Martin, he cautioned me that long before the click-bond era, many a imbedded bolt and screw would either vibrate out of the their flox mooring, or simply break loose when either being tightened or during nut removal.  So, how do we ensure this doesn’t happen?  Well, we make the screw head NOT round and give it an edge… for flox to grip, and provide a physical stop that prevents the screw head from turning.  I ended up following his advice after even further discussing with him and a few other gurus on the affect that “butterflying” the screw heads would have on the strength of the screw.  As I suspected, seems that these AN guys are pretty darn stout and it wasn’t a significant limiting factor, so I notched my screw heads in “butterfly” fashion.

Chap 8 - Mounting Seatbelt Brackets

I cut 4 pairs of countersink notches into the outside corners of the fuselage around the screw holes that I had drilled previously from inside the fuselage going out, having used the seatbelt brackets themselves as a template (that’s why each bracket is marked as to where it needs to go exactly since they were initially all hand drilled and have some slight variances in hole locations, drill angles, etc).  Besides just making these countersink notches just wide enough for each respective screw head to fit, I also had to make them deep enough so that there would be enough of each screw’s thread coming through the bracket to put a nut onto, and have the requisite 2-minimum threads showing after the nut is mounted.

Chap 8 - Mounting Seatbelt Brackets

Chap 8 - Mounting Seatbelt brackets

Chap 8 - Mounting Seatbelt Brackets

Finally, I floxed in the seatbelt bracket screws from the outside of the fuselage inward, and put a thin film of flox on the bottom face of the seatbelt brackets.  I then bolted on all the seatbelt  brackets (my buddy Kevin helped by keeping the screws from spinning on the outside of the fuselage while I installed the nuts from the inside).

9june

•••

10 June 2012 — Today was a prep day to knock out some of the myriad of nit-noy things that need to be completed before the fuselage can be skinned.

So, before I turned the fuselage back upright I rechecked the embedded brake lines.  I specifically wanted to make sure the foam/glass conduit exit points were good—they look fine and positioned correctly.

Chap 7 Mod - Imbedded brake lines

Chap 7 Mods - Internal rudder cable conduit & brake lines

I measured out and designed the side fuselage openings that allow access into the strakes (wing root area).  Specifically, access to the pilot & GIB’s baggage area.  Guilty of some more slight modifications, I reshaped the oval front of the GIB’s opening to one that is slightly more ‘triangular’ (maybe a better description than C-5 nose-ish?!) and follows the curve of the embedded rudder cable conduit.  I’ll also most likely extend the pilot’s strake opening to the instrument panel… somewhat of a Cozy Girrrl’s strakes mod for a Long-EZ.

Chap 7 - Determining fuselage strake opening

Chap 7 - Determining fuselage strake openings

Next, I cut off the front top corners of the fuselage to create a “shelf” for the canard to sit in and be positioned correctly to mount to the F22 (front) bulkhead.  The aft vertical line of this square area that gets cut out is drawn straight down from the front edge of the F28 bulkhead (the narrow one across the top of the fuselage).  The plans call for a more invasive cut into the fuselage, but of course I’m deviating slightly by just making a simple square cutout without any of the jut-outs in the corner that the plans would have me make.

Chap 7 - Removing F22 tabs & creating canard "shelf"Chap 7 - Removing F22 tabs & creating canard "shelf"

After the “lightening” of the fuselage above…ha!  I did a little bit of housecleaning by sanding down a bunch of the heavier micro & flox rich areas on the fuselage.  I also sanded down the longeron tops in prep for glassing (wood grain should be sanded so the epoxy grips it better).

My last effort of the day was designing and constructing a fuselage “spit” so I can spin the fuselage in quick-fashion as I glass it.  I got the front half of the spit completed with some good initial ops testing.

Chap 7 - Fuselage glassing "spit"Chap 7 - Fuselage glassing "spit"

 

Lastly, with the fuselage upright I had the opportunity to take a good look (and some pics) at the seatbelt mounts on the inside of the fuselage. . . let me say: “those dogs will hunt!”

Chap 8 - Seatbelt brackets installed

Chap 8 - Seatbelt brackets installed

•••

11 June 2012 — Tonight was all about finalizing the fuselage glassing spit design and getting it built.

I beefed up the spit with bigger pieces of wood and mounted the spinning part of the disc directly to the clamped mount in the front.  I added more screws & longer screws to make it more stable.  Finally, to really add some oomph to its lateral stability, I added some 45° angle braces.

Chap 7 - Building fuselage glassing spitChap 7 - Building fuselage glassing spit

Chap 7 - Building fuselage glassing spitChap 7 - Building fuselage glassing spit

Chap 7 - Building fuselage glassing spit

 

 

 

 

 

 

Side note:  As you can see, underneath the rear of the fuselage there’s some water that I vacuumed up with the shop vac.  I’ve been plagued by a leak in the corner downspout of the garage.  The actual PVC pipe is too short, so I get to take my pick where I want the water to come in …. the top or the bottom.  Luckily it hasn’t damage anything.  It’s just an annoying time buster to deal with a work shop that has a large puddle of water in it.  And yes, my landlord knows and is slow to do anything about it.

•••

12 June 2012 — Not much to report today.

I rechecked the spit structure and made a few slight modifications.  I added another 45° brace to the rear spit upright.  Then I taped up the firewall in preparation for glassing the fuselage.

•••

Greetings Dear Readers!

13 June 2012 — The good news is that I have much to report. The bad news is that I only have one pic to share . . .

Today I organized and cleaned the garage in preparation for skinning the fuselage exterior. I sanded down the lower stringers and then vacuumed the entire fuselage.  I then finished taping the lower aft section of the fuselage and the main landing gear brackets in the “hell hole” area near the firewall.

I pre-deployed glassing supplies out to the garage.  I also added another 45° brace on the fuselage glassing spit.

I marked the top longerons for the layout of the staggered 3-ply layup of 3″ UNI “tape” (NOT actual UNI tape, this is just plies of UNI cut into 3″ strips).  Because I will be employing the Steve Volovsek/Ken Miller “Elbow Room Mod,” which enlarges the strake openings in the side of the fuselage further aft, I decided to add 4″ to each top tape so the resulting lengths are 56″, 54″, 52″ for each side (all obviously 4″ longer than plans).

Finally, I’ve been researching the final fiberglass finishing techniques and systems for the last few weeks.  I think I’ll go with West, but because of some reservations of a couple of actual builders that I’ve been discussing this with (who used other systems), I’m going to test it out first.  I picked some up from a boating supply store here in Germany for my tests.

West Epoxy System

•••

14 June 2012 — Today I finalized the fuselage preparation for glassing the exterior skin of the fuselage.

While I was double-checking everything I realized that at some point I had been a little aggressive in my sanding & cutting of the foam at the back edge of the fuselage where it butts up to the firewall, on the Left side of fuselage.  This past overzealousness created a small gap that needed to be filled, so I made up a foam wedge that was 0.2″ wide from front to aft, around 0.4″ deep (depth of foam in that location), and approximately 6.2″ in length from top to bottom.  I then micro’d this foam wedge into place to cure.

Chap 7 - Rear fuselage foam repair

I ops tested the fuselage glassing spit one more time and added some more screws to the front round disk to add strength and keep it from rotating where it wasn’t supposed to be.

I taped up the two threaded inserts along the fuselage bottom centerline to keep the epoxy out.

I used my Perma-grit tools to prep and clean up all the conduit channels so they would be clean for a fresh micro application.

I mixed up two more bottles of hardener and restocked the micro.  I then repositioned the fuselage at an angle to make the sharp-angled 30° applications of UNI on the fuselage a little easier.

Finally, I played around with the pilot strake opening positions looking at the pros and cons of stock vs. extending the openings to the instrument panel (again, ala the Cozy Girrrls strake mod).

•••

Recent Posts

Project Update

Hey Guys,

So this is still it!  And yes, I continue to fight in my hope that this will be the final push –from now until Rough River– to get the main assembly of the aircraft completed.  That’s my goal.  An aggressive timeline to be sure!  After Rough River, I then expect the next few months to be finalizing any leftover punch list items and the finishing & painting! 

As you probably know, starting a few months back I had planned on knocking out a good dozen electrical related items so that I could close up the nose.  I got a bunch of those completed, but kept finding myself not being able to really close out wire runs, confirm install spacing configurations such as the pitch trim unit, etc. because I couldn’t sit in the airplane and confirm what I had dimensionally without the actual pilot’s seat in place.  I couldn’t get the pilot’s seat area done without contending with the fuel lines, driving me to complete the thigh support fuel sump.

So the immediate order of battle right now is to finish the major components in the back seat (GIB) area, primarily the oil heat system with requisite ducts, before then moving forward again to the pilot’s seat area. These mini-tasks are definitely time-consuming and a lot more slow going then planned.  But they allow me to work all this stuff while I can stand right next to the fuselage without having to deal with strakes being in the way!  

Plus, anything that I install now is just one less item that will need to be installed at some point in the future.  Obviously not as sexy as seeing major aircraft components (i.e. nose, strakes, canopy) being completed, but Oh so necessary for quality of flying later on!  Moreover, these completed tasks, in turn, will allow me to finalize the configuration of the nose components. At which point I will focus on the building the nose while concurrently finalizing the wheel pants install (nope, haven’t forgot about those!). Then the canopy install will be after that.

The struggle is REAL folks, as it continues to be busy all up in here!!

Cheers!

 

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