Time: 2 hours
Today I just did some cleaning and prepping to do the install of the canopy (hopefully on Friday). I also decided to use some sika to stick the backing plates on the inside of the canopy so that I don’t have to worry about lining things up while I have the sika sealer oozing from the seams and having to rivet and clean that while installing the canopy.
Just when I thought I was ready to install the canopy a few tings came up. One was that another builder (Peter C.) had mentioned that adding in extra 3.2mm rivets along the fuselage/canopy side seam is somewhat of a must. I did look at that and the skin seems to fit pretty tight to the canopy on my plane. However once sika is put into the seam it may cause it to bulge a bit. So now I ponder if I should add in the extra rivets. I don’t want to do it after the sika is involved because drilling them out with wet sika sealer isn’t going to be pretty.
The other issue is that I was looking at the 3.2mm rivets (the most common used are 8mm in length) and was thinking maybe the rivets are a little short. I kind of eyeballed it so it’s questionable, but to me they see a little short especially for the side section where you are going through the thicker side fuselage skin, plus the fiber glass, and then the thick backing plate. I had purchased some 10mm ones that have a little different head for something else and those seems to be a better length to use, but I never remember seeing 3.2mm x 10mm rivets used on the plane anywhere. I checked my pack list for the canopy kit and no mention of any longer rivets. I then looked on an excel spread sheet that I got from TAF that lists most of the kit pack lists and low and behold there they were quality 80 of HW-RIV-143 rivets (not the more common HW-RIV-142 rivets that are used on the kit) listed on the pack list for the canopy kit. The “3” is the length which is 10mm (2 is 8mm). So it looks like you are supposed to use a little longer 3.2mm rivets on the canopy. The larger 4mm rivets are OK because they are 10mm. So now I need to check with Torrance TAF to see if they have any 10mm 3.2mm rivets or if I can order some that will match better then the cherry rivets I have.
Time: 3.5 hrs
Things done today:
- Masked off canopy to protect from sika sealer
- Made reinforcing backing plates for rear rivet lines on canopy
- Cut side reinforcing plates
- Primed all reinforcing backing plates
- Dimpled and counter sunk holes in canopy and skins where parachute cover goes
More work on the canopy. There were a few holes on the top rear part of the fuselage that needed to be dimpled and countersunk so the the parachute cover can fit flat on the skins. I also made the reinforcing backing plates for the rear (rounded) part of the canopy. These were easier to make then I has expected. I just put some masking tape over the outside of the rear skin along the rivet line that I wanted to make the plate for. I divided the rivet line into two… pretty much all the 4mm rivets as one plate and then the remaining 3.2mm rivets as another plate. I did it this way because it would be more difficult to make one long piece that curved around to fit the inside of the canopy. I cut the tape to match the edge of the skin and then pealed off the tape and stuck it down on the scrap aluminum. I then used snips to cut out the part. I left the tape on the part and put it on the inside of the canopy along the rivet line. The first one I made I made the mistake of putting it on the inside of the skin rather than the canopy. This didn’t work because the canopy is a little tighter radius then the skin so once you mark and drill all the holes they won’t line up. Also a thing to note if you leave the tape on the aluminum it helps to keep the punch tool from slipping around on the metal when you punch to mark the drill hole. By preventing the punch from moving you get a more precisely place hole.
Canopy masked off to protect it from sika if it oozes out from the rivet seem.
Making the backing plate. The tape was put on the aluminum scrap and cut out with snips. The line came out pretty straight. I also marked the holes to be drilled.
All the holes drilled out. The larger part fits on the top most part of the rear of the canopy. the small piece fits behind the remaining rivets (3.2mm) in the rivet line.
A few photos of the backing plates in place. They look a bit more crooked then they are. I think its because the edge of the canopy is so uneven. All this will get covered by leather or carpeting so it doesn’t have to look super pretty.
Time: 3.5 hrs
This morning I was able to sand the spots I had filled and sprayed it with some primer. This evening I drilled out all the holes for mounting the canopy. I had thought I would need to cut back some of the material at the top rear of the canopy to get it to fit better, but after some better positioning it didn’t need to be trimmed at all. The most challenging part was trying to figure out how to know if the canopy was positioned evenly on the fuselage. I ended up going with the method of measuring from the rivet holes on the top of the fuselage side and the edge of the door frame. I made both sides the same and it seems pretty even. It’s difficult to tell because I don’t think the canopy itself is perfectly shaped and due to the curved top it’s a bit hard to use a level to check that it’s level.
All the holes in the top of the canopy are drilled. The canopy fit pretty tight against the skin so I didn’t have to pull it too much while drilling. There are a few holes that are a bit close to the edge of the inside tab, maybe 1/8″. I’m going to see about making a backer strip out of aluminum for this row of rivets like what is provided for the side holes. I don’t like pulling the rivets with only the fiber glass in the back.
Side holes drilled as well. This went pretty quick once I worked out the measuring bit (explained above).
Next step is to make the backer strip for the rear top rivets. After that I need to dimple a few of the holes in the top where the parachute cover attaches and counter sink the fiberglass a bit. Also I need to remember to put Sika seal in between the canopy and skins before riveting the canopy in place.
I picked up my carbon fiber parts from the paint place today. After I cut and cleaned up the pieces I had tested some clear coats on the scrap carbon fiber pieces. I got close to what I wanted but not exactly. Since I had to bring the canopy in to get painted I asked them if they could spray the parts with some left over clear they might have from another project. Well today I got to pick them up and they are exactly what I was hoping for. Carols at McCluskey’s Ltd. did such an awesome job on both the console parts and the canopy and was extremely reasonable on the price. I’ll definitely be taking the plane to them to get painted. Also Hernan at Montenegro Manufacturing was very easy to work with on getting the carbon fiber parts made up. I think I surprised him when I told him I was going to make the molds for the two parts… I don’t think he likes to make the molds 🙂
This was a great project because I got to learn a few things I probably wouldn’t have had a chance to learn. I think that’s what experimental aircraft building is all about. I mean after all you’re building an airplane and who gets to do that all the time? So why not take those opportunities to push yourself and learn new things. Of course you need to know your limits and you don’t want to do something unsafe, but use the time to do things you probably won’t have a chance later to do.
The final finished parts. I know there are some flaws in them but they came out exactly how I was hoping. I’m sorry happy with how they turned out.
Just a reminder that this is what they looked like after they were cut out and cleaned up.
And how they came from the manufacturing place.
Didn’t have much time today to work on the plane. I want to get these few spots filled, sanded, and primed so I can install the canopy. I could probably let the paint place do these, but I think it will be easier to do with the canopy out. I filled with the expos putty and will let it dry for a day.
Some areas right along the edge where the canopy meets the fuselage. This part is exposed so it will be seen. Probably easier to fill it now and prime it then later.
I’ve gone around and around on this. Very early on I found the Aveo EyeBeam Touch (photo below) light and said that I was definitely going to use those for the pilot and co-pilot overhead lights. Then when it came time to buy them the “Cheap Bastard” in me said wow that’s too much to spend on a light (just under $200 each from Aircraft Spruce). So I went on a few hour Internet hunt to find something that will work and was cheaper. I did find a nice aluminum light on Aircraft Spruce that would work, but then I would need to add in a switch to select between the red and/or white LED lights and also a dimmer. There are some cool 12V DC dimmers out there as well, but I worry about the quality. A lot are from China and seem a bit suspect. So after many hours of searching I’ve come to the conclusion that if I want to keep things simple and have a good quality light I should probably just pony up the money and get the Aveo’s.
Now the rear overhead lighting is a little different. It doesn’t need the red/white LEDs and they will be seldom used. I do want them to look nice, but I may get away with something quite a bit less expensive then using the Aveo EyeBeam Dome (photo below). I found some nice aluminum recessed lights for an RV (not the airplane 🙂 ) and a dimmer that allows you to use the aluminum body as a swicth and dimmer. 4 lights are around $32 and the dimmers are about $15 each. Far less then the $200 each for the Aveo’s… but the Aveos look so nice.
This is the Aveo Eyebeam Touch. I’d probably get the silver with a black control cover. This really simplifies the install in that the unit includes switches for the red and white LEDs, plus a built in dimmer. Also I know the quality is a bit better then some of the items I’m finding on Amazon.
This is the Aveo Eyebeam Dome. This would be my first option to mount for the two rear dome lights (for the back seat). But at over $200 each I’m a bit less inclined to get them… now if I were to win the lottery… well.
I found this as an alternate to the Aveo Eyebeam Dome for rear seat domes. This is an all aluminum body 12V LED light. I could use the dimmer I found to make the body touch sensitive for switching and dimming. You can get a set of 4 for around $32. they also snap in with the spring loaded clips.
I got the canopy back from painting. My wife helped me place it on the fuselage. The fit is pretty good. It looks like I may need to trim a little in the back top to get the right rear side to fit a bit closer. I’ll try to work on this in the next few days. I also noticed some spots that need to be fixed on the outside fiberglass that should probably be repaired before I install the canopy.
I’m really happy with how the paint came out. It’s not as shinny as the TAF quick build paint job and the grey matches the other grey used in the plane.
Here’s the hole configuration that TAF has cut into the top of the canopy. The front holes are about 1.5″ and the rear around 1.75″. I will most likely need to widen those a little since I’m not using the standard lighting from TAF. The other long holes are for the door hinge retainers. They are covered by some aluminum plate which I had painted as well.
There’s only about 7/8″ of depth in the canopy so you can’t use any lightning the is deep and also since you can’t access the other side of the hole then the light need to snap in or use some other creative method for mounting.
It’s going to look like an airplane soon…….
I’m thinking I may need to trim a little of the fiberglass away here at the top rear of the canopy.
This is the right rear. You can see it’s maybe 1/4-1/2″ off. If I pull up and back on the canopy it does seem to line up ok, but I may need to trim a bit off the top on the rear canopy flange to get it to sit back more easily.