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On Jun 13, 2006, at 5:03 PM, Joe Hull wrote:
Buly [said]
Debating if I should remove the turbo?
I was pushing hard a couple years ago to get a turbo - after watching Dave
Leonard's and John Slade's escapades - I decided I could do without the
complexity. I may P-Port a test engine I've got sitting around and see how
that goes. You lose a little HP at altitude with a P-Port or any NA engine -
but you also lose a lot of complexity and risk. I'd rather give up that
chunk of risk - makes for more peaceful flying! (Now all I have to worry
about are the other 72 things that can go wrong!)
Joe Hull
Cozy Mk-IV #991 (In Phase1 Flight Test - 29.1 hrs flown)
Redmond (Seattle), Washington
My engine was built with high compression rotors and very large (20B) intake ports. The turbo was an after thought of mine and John's. I have already removed the wastegate and bored a hole for direct bypass of 25-30% of the exhaust gasses with a second exhaust pipe. The turbo is still hitting 50-60" MAP and is hard to control at the top end. I'm yet to open the engine to full throttle. Seems to me with the electric IVO 68" ( and 45" to 105" pitch range) prop I can get the RPM I need without the turbo?
Buly
http://tinyurl.com/dcy36
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