Kirkey Seat Test Fitting

The new seat has arrived! As expected there is some modification that needs to be done. The front of the seat interferes with the seat. I am not sure which route to go, either modify the seat or the stick. The idea of modifying the stick was what came to mind first; not sure why but a bent yoke stick just looks cool.

Here is an example of a bent stick on Smizo’s airplane. Photo from biplaneforum.

A new day, a new seat

As it turns our the previous seat that I ordered was not strong enough. It was flimsy, it looked good on the website but when we received it, I can not imagine pulling 5 g’s in that thing. While flying an aerobatic sequence, a 200 pound person would exert 1000 pounds in this seat and I do not want to risk this thing coming apart. One reason for selecting this seat was the lightweight, at 2 pounds that would be great for my overall goal of having a lightweight aerobatic competition airplane.

So I have selected another seat. Kirkey 41900V, it weighs 10 pounds but it is built like a truck, it already has the seat-belt holes built it, and it has a simple option for covering it. One last positive is that the seat is wider, that can accommodate my ever-so growing waist line!

So here is the new seat on order…



February Progress!!

I am very happy that we have been getting a lot of work done on the build. From the update last month, I was speaking about seat options. There was someone on the BiplaneForum that reccomend a Tillett seat, and I looked into this option, and a few others including a custom seat. Well, the Tillett seat seems to be a winner. Having side support is an important factor because when doing aerobatics, I need to stay firm in my seat for better control.

Here is the Tillett seat.



Also the previous builder fabricated the bungee truss incorrectly using the wrong size steel. The old bungee truss was cut out.

Screenshot 2017-03-06 19.56.29

The area was sand blasted and the new bungee truss was test fitted.

And finally welded in to prefection.

I ordered riging boards from Steen Aero to check the incidence of the wings.

Screenshot 2017-03-06 19.59.31


The top wing was test fitted just to see where we stand. So far everything is looking good.

We also had a chance to figure a location for the com and transponder antenna. The com antenna most likely will go in the turdle-deck, which has no metal surrounding it, just wood and fabric. The transponder antenna will go somewhere under the belly. Also we are giving though to harness (seatbelt) location. Metal tabs will need to be fabricated to archor the belts.


Plan of action; The next couple of months

I am happy that I already purchased my ticket for Sun-n-Fun, I fly in late Monday night (actually it’s Tuesday morning and leave late Wednesday. At SnF I can accomplish a lot and get some ideas for my build. My main reason for going is to try on different manufactures of parachutes, see which one fits me the best. Also I plan to try on a helmet.

Still, I am up in-the-air (Pun intended!!) about if I want to put lights on my airplane, so this will give me the opportunity to meet different vendors and if they have something lightweight and economical,  I may consider it.

My plan is to put a one-place canopy on, so again, a great opportunity to see what everyone else is doing.

It is time for me to consider what I want to do about a seat so I got a great idea from someone on biplaneforum. His method was to use a system that creates a custom mold of you bum. After the mold is finished, it is trimmed, some extra squeeze foam is added to certain areas. Then finally the mold can be covered in your choice of fabric (4th, 5th & 6th picture down). This is fantastic, the only problem with this route is I will need to have a parachute to be able to make the mold, and most likely I will wait on the parachute purchase.

Another option I have for a seat is purchasing it from Aircraft Spruce. The only problem with this is that the seat doesn’t look that comfortable. I did find someone who installed this seat and has gotten good reviews so this may work.

Finally one more option for a seat, or as this is, a seat back.


If you notice in the plans there is a steel diagonal tube going from station 51 to 79


The previous builder put a horizontal tube which the diagonal tube should be…..why? Who knows, but it is structural and needs to be fixed.