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Anyone tried an oval outlet pipe?

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Anyone tried an oval outlet pipe?

Old 05-23-2013, 05:12 PM
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mr_matt
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Default 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,

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Old 05-23-2013, 05:38 PM
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powerjets
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Default 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.
Old 05-23-2013, 05:41 PM
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mr_matt
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Default RE: Anyone tried an oval outlet pipe?

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

Thanks
Old 05-23-2013, 05:58 PM
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tamjets
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Default RE: Anyone tried an oval outlet pipe?

Had made few of those special oval pipe UAV.
Old 05-23-2013, 06:04 PM
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powerjets
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Default 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.

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