Anyone tried an oval outlet pipe?
 

Hi everyone,

This message was originally meant for Tam but I figured I would ask everyone.

Has anyone attempted to make and use a tubine pipe with an oval outlet?

I realize there would be mechanical stress on the pipe outlet (requiring some sort of external support former and possibly a strut through the middle of the oval).

I am wondering how the flow behaves, if the total exit area is the same as it would be in a round pipe.

Thanks,

RE: Anyone tried an oval outlet pipe?
 

Matt, I have been flying an Avonds rafale with a rabbit , along with an oval single exit pipe.
No problems after 2 years and lots of flights.

RE: Anyone tried an oval outlet pipe?
 

OK great, any picks or details on the pipe? Is it stock Avonds?

Thanks

RE: Anyone tried an oval outlet pipe?
 

Had made few of those special oval pipe UAV.

RE: Anyone tried an oval outlet pipe?
 

No, its not stock, its just an experiment which was done to minimize losses with a RAM 500. -Instead of the bifurcated pipe, I made a single wall oval exit pipe.
now with the rabbit power is plenty , but I left the single pipe as it works well.
I made a plywood former (as in your drawing) to fit the pipe oval exit, no need for a strut..
the plane is in storage now, but can get some pics for you later if needed.