This thread is where I am going to post the PDF files of the various tailcone templates I have created. This way you do not have to search the build threads for them.

Don


If you want to buy a roll of film for a lot of tubes you can here:
http://www.shopatron.com/products/ca....20231.0.0.0.0

I use the .005" but you may want to consider the .0075" as it is a little stiffer.

More links:
http://www.shopatron.com/products/pr....0.0.0.0?pp=8&
http://www.shopatron.com/products/pr....0.0.0.0?pp=8&

or you can by sheets
http://www.shopatron.com/products/ca...20231.0.0.0.0?

For the HE-162 with 64mm EDF fan unit. You will probably have to tape two pieces of plastic together if using 8.5 x 11 sheets.

Don

SR71 Exit nozzle template for 64mm fan.

Freewing F-35 exit nozzle template for 64mm fan.

Electrifly L-39 template for stock fan 80% FSA

HP F16 template for use with EDO type I fan. File is in two parts, top and bottom half.

Don

Great idea Don. Any chance of a thrust tube for the Alfa MiG15? The wings haven't fallen off in over 90 flights. Enough with the stress testing, it might be time to increase the speed a little (4800kV, Alfa 5 blade fan, 3S).

For the alfa fan unit you want a 1.8" exit diameter. I can make a template but need to know the length needed.

Don

But I'm wondering if it's worth doing (or more improtantly, have I got my calculations all wrong ). The stock thrust tube is 51mm (2.008") exit diameter, and if the reduced outlet comes down to 45.72mm (1.8"), this represents a reduction of only 2.64mm from the stock radius.

Originally Posted by CaseySP

2.008" down to 1.800" means the area is now (1.8/2.008)^2 = .80 or 80% which is a huge change in outlet area. You can try a tapered tube of Depron but I would make it at least 100mm long.

Don

Thanks Don.

You're right - the reduced outlet is 80% of the stock area.

Might be easier if you could design a new tube. The stock tube tapers a fair bit, so putting a piece of depron 100mm long up there and keep it reasonably smooth would be quite a challenge.

Sorry did not mean to edit your post, the two buttons are right next to each other.

Originally Posted by The Don

But I'm wondering if it's worth doing (or more improtantly, have I got my calculations all wrong ). The stock thrust tube is 51mm (2.008") exit diameter, and if the reduced outlet comes down to 45.72mm (1.8"), this represents a reduction of only 2.64mm from the stock radius.

2.008" down to 1.800" means the area is now (1.8/2.008)^2 = .80 or 80% which is a huge change in outlet area. You can try a tapered tube of Depron but I would make it at least 100mm long.

Don

Originally Posted by The Don

Sorry did not mean to edit your post, the two buttons are right next to each other.

Don

I wasn't going to mention it

You can make it up to me by sending me one of your replacement Alfa fan units

Template for the 50mm F-16

50mm F18 thrust tubes and centering rings.

Hi again Don.

Just received a new Alfa MiG15 and have decided to run a reduced diameter thrust tube. Could you be so kind? The factory depron tube is 62mm ID at the fan end and 230mm long.

Maybe a spacer ring would be good too. The ID of the fuse at the exit is 63mm, and this point is 20mm from the end of the thrust tube.

Cheers.