Mailing List flyrotary@lancaironline.net Message #10687
From: Michael Haynes <mickandfi@ihug.com.au>
Subject: flyrotary inlet ducting question
Date: Tue, 24 Aug 2004 00:54:31 +1000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Hi All
I Have a question for those who are running turbos. Today I had 3 phone calls from Max at ATS down here inregards to inlet position. He has an idea about the overspeed at altitude. Since I wont be flying for some time I thought you guys might like to hear it.
 Basically what he told me was that as we gain altitude the air gets thinner ( we all know that ) and therefore the compressor has less resistance and over speeds. anyway he has suggested to have a separate intake scoop for the turbo . And that way increase the pressure to the turbo inlet.
 Could those that are, or have run a turbo tell me weather or not you used air from inside the cowl or fresh air via a scoop for the feed to the turbo. Ill pass the info onto Max, he said he's been staying up at night thinking about it and really wants to help.
 The only other fix he has talked about is going to a roller bearing turbo that is rated to 200,000 RPM  . standard is I think he said 120,000 RPM.   
 HAY JOHN  i think I might get him to sponsor my plane . endless supply of turbos :)
 Cheers
 Mick 
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