Interior main gear doors.
I’ve finished all installation of the servo extensions and retract hoses. They’re threaded through all the various holes and crevices. I’ve also cut and installed the main gear floors into their wells (cut from 1/64″ birch plywood).
But now the next step has me a bit stumped. As part of Yellow’s retract kit, they supply a small piston to actuate the inner main gear door. The geometry of mounting this is going to be interesting. There’s not enough room to mount it in the center of the door because of the tire interference, so it will have to be mounted either for or aft in the wheel well. Also, the piston is a good quarter inch higher than the depth of the wheel well and will need to be mounted on a pivot. Probably should have done this before installing the gear floor, but we’ll see.
I’ve rarely needed instructions for any of the build so far, but when I could really use some, there’s none. Here’s shot of how the instructions show:
Well, I’ve found a few other on-line builds and it’s time to refer to them. Maybe I won’t have to re-invent the wheel here.
June 18, 2009 at 4:11 am
Buddy, I would use a BVM offset hinge, with a very small air cylinder connected directly to the hinge brace and laid flat on the top skin of the wing (only very small foam carving required).
The advantage of connecting directly to the hinge is that you will need very short stroke cylinder, vs the mammoth provided by YA.
David
June 18, 2009 at 7:00 pm
I’ll look into this. After some more study, the common way to mount this is through the wing – it actually mounts on the top of the upper wing skin. Not sure why they used such a large cylinder for this!