Mailing List flyrotary@lancaironline.net Message #10364
From: Michael Haynes <mickandfi@ihug.com.au>
Subject: Re: [FlyRotary] Turbos from the land of Oz
Date: Fri, 13 Aug 2004 12:36:06 +1000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Hay John
 Dropped off my turbo yesterday and confirmed more air flow less boost! I STAND CORRECTED. I Still don't under stand. Anyway Max has taken a lot of interest in what we are doing and is researching more on a way to control boost at alt. He did mention that the microtec computer that is used down here a lot does compensate boost with alt but not sure to what alt it goes to ( designed for driving in the hills ), also has limp home mode. Ill find out more when I see him next.  
 Cheers
 Mick
----- Original Message -----
From: John Slade
Sent: Wednesday, August 11, 2004 12:47 AM
Subject: [FlyRotary] Turbos from the land of Oz

G'day Mick
> I must say you did a good job on the turbine or what was left anyway!!!.  
Thank you, thank you. I try hard to please. :)
 
Thanks for the update. It's a little scary dealing with a company so far away, but Max seems like a straight up guy so I never really had any doubt he'd come through. Just took a little longer than I'd hoped.
 
400HP. Yes. he mentioned that. A bit lower at my max rpm of 6300, but still - plenty of grunt. :)
 
 > From what he explained to me was that you will get more boost for a slower turbine rpm,  
I thought it was less boost for the same airflow.
 
 >  He did mention something about throwing in a couple of peacock feathers just incase you blow it again.  
Oh! Nice touch.
 
 > Now im thinking of changing prop size. ( currently ivo 70" variable high  pitch 3 blade ) can you make any suggestions.  
 
Well mines a wood 68 three blade with 314 blade area from Performance.  It'll accelerate the plane to take off in 1000 - 1500 feet at 4300 rpm and climb quickly at 5000. It'll even climb at 2300 rpm. Should be ideal for about 280 hp in cruise and should get me a better top speed than a variable pitch. Given that you need 2000ft to land I'm not sure a variable pitch prop will buy you anything on a Cozy, and it'll probably cost you at the top end. Are you building a Cozy or an RV? I forget.
 
Cheers,
John
 
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