RCU Forums - Ducts & bypass sizing?

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JohnW

02-27-2010 11:09 AM

Ducts & bypass sizing?

What are the rules of thumb when it comes to sizing inlet area, bypass, exhaust pipes for turbines? In my application, looking at sizing for P80-P120 sized turbines. Thanks in advance. -John

Dave Wilshere

02-27-2010 01:02 PM

RE: Ducts & bypass sizing?

John

Inlet length will affect area, Bye pass on a turbine anything from 3/8" to 1/2" all around (3/4 to 1" on dia) Tail pipe again many variables, but 3 1/2 to 4" is good for either a P80-P120.
Can you say what aeroplane?

Dave Wilshere

JohnW

02-27-2010 02:00 PM

RE: Ducts & bypass sizing?

1 Attachment(s)

Duct is for a sport jet a group of us locally designed. Distance from the inlet to the front of the turbine housing will be about 14" as shown by the tape on the plug. Probably only need 6" of pipe after the turbine. Does this help?

sc0tt

02-27-2010 03:17 PM

RE: Ducts & bypass sizing?

1 Attachment(s)

Jetcat has tailpipe size info on page 46 in this catalog download...
http://jetcat.de/downloads/jetcatkatalog2009web.pdf

Here is a.jpg of the info...

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