Originally Posted by Larry Dudeck

"...Why is no one using thrust tubes? This would also direct the thrust past the wiring holes in the Nacelle and allow for more efflux..."

Like this?

Yea, kinda like that. How well do those ones work for you?

I would like to go with 90% FSA cones that extend about just an inch past the t.e. of the nacelle. Paint the cones black and adhere them to the back of the fans. I would try and make them look like this but with wider exhausts for the 90% FSA.

Originally Posted by WhalleyB0Y

I would like to go with 90% FSA cones that extend about just an inch past the t.e. of the nacelle. Paint the cones black and adhere them to the back of the fans. I would try and make them look like this but with wider exhausts for the 90% FSA.
Attachment 5503531

Yes , look better with tube extend a bit out side .

Originally Posted by Jeanskydive

Yes , look better with tube extend a bit out side .

Woa exactly! What kit is this one? Looks pretty nice^^

Originally Posted by WhalleyB0Y

Woa exactly! What kit is this one? Looks pretty nice^^

This one come Laser Desing Services in wood kit., almost complete now am wait for is retract gear. Following is build-up at Republic Fairchild A-10 rcgroups. Cheers http://www.rcgroups.com/forums/showt...1777442&page=7


LDS Services wood kit http://store.laser-design-services.c...products_id=71

"...Yea, kinda like that. How well do those ones work for you? ..."

As the outlet cones are adjustable, I was able to "aim" the thrust line through the balance point. This completely eliminates any pitch change when varying the throttle.

Originally Posted by Larry Dudeck

"...Yea, kinda like that. How well do those ones work for you? ..."

As the outlet cones are adjustable, I was able to "aim" the thrust line through the balance point. This completely eliminates any pitch change when varying the throttle.

+1, I see the importance of the adjustability.

I used silicone to mount the fans and the ducts. These thrust tubes provide for 90% FSA.

Originally Posted by WhalleyB0Y

Attachment 5507219
Attachment 5507220
Attachment 5507221

I used silicone to mount the fans and the ducts. These thrust tubes provide for 90% FSA.

That looking verry nice with your thrust tube exit , nice rotor fan there .

Originally Posted by Jeanskydive

That looking verry nice with your thrust tube exit , nice rotor fan there .

Lol, thanks. They look a lot more like your big kit now.

Originally Posted by WhalleyB0Y

Lol, thanks. They look a lot more like your big kit now.

Yes Sir I did the same on mine also, with 1/64 plywood and 10degr.,angle upward a little bit , have somes mores pictures later Cheers

Man, you are a wizard with the wood working! Nice work!

You might get to test your thrust tubes before I do so I would like to know how it works out in flight. Best of luck.

Originally Posted by WhalleyB0Y

Man, you are a wizard with the wood working! Nice work!

You might get to test your thrust tubes before I do so I would like to know how it works out in flight. Best of luck.

Yes I will do a flight test nex if weather here get calm in nex days with is news thrusts tubes to check if I get somes performences improve, I reduce a from 10degr., to 5 degr., upward thrust tubes. Cheers

Well I did a flight test this afternoon with is news thrust tubes with upward by 5 degr,angle, and I did not see any amelioration of is line thrust I still need tree clic elevateur trim up , same like before , but the speed increase pretty good with 55 mm exit dia., thrust tubes for the 70 mm fan. Cheers