70cc FLEX Ultimate assembly thread.

AKNick said:

I'd put a 1/4-1/2" bump in the aft air exit. You could just cover a little piece of ply and glue it to the front former there. Maybe some tri-stock if you want to get fancy.

I'd be happy to draft something in CAD for you, shipping and item to Canada might be tricky.

Click to expand...

Let me take another picture and sketch up what I am thinking and see what you think. Thanks

@AKNick .
ok I will try to explain and see what you come back with. The last photo is as it is now. The next photos is how I would like to finish the exit ducting with a lip in front of the exit hole to suck the hot air out. What I have done is cut a piece of cardboard and placed into the hole to show what I want. The only thing is the leading edge or front section I would like it lean backwards at 60 degrees and the sides vertical. This shape is very difficult to do with balsa wood. ( bending in 2 directions). Second cannot get my hands inside the fuselage in this location to glue it in, the wing tube and landing gear is right there. What I was thinking of is a 3D printed deflector with a lip on the bottom. So it can slipped in and then some ca added to the lip and the 3D printed deflector pulled up and glued to the inside of fuselage. Hope I am making sense, if not let me know will make a sketch.

The canister is done Teflon tub in place, clamps and two locking screws to stop it from rotating.

@AKNick . Hopefully this helps.

If I may part some info to you gentlemen as you see from the picture I have glued a screen over the hole that feeds fresh air into the cowl on the bottom directly in front of the carburetor, this is great but not. Cool air is good but not a direct hard flow of air onto carburetor diagram cap at 80mph. So I instal a screen to let the air in but defused.

Only thing I am going to say if you are going build a 70cc Ultimate make your own baffles, easier and will be done much quicker. Now I have to tackle the top half of the cowling.