Mailing List flyrotary@lancaironline.net Message #23723
From: Bobby J. Hughes <bhughes@qnsi.net>
Subject: RE: [FlyRotary] Re: normalized supercharger?
Date: Mon, 13 Jun 2005 12:00:21 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Jonathan,
 
Power (boost PSI) really does matter for normalization. At 8000 ft air pressure is at 22.22 hg. It will talk about 3.75 psi of boost to recover to 29.92. But you are correct. No need to work the spin the SS any faster than necessary.
 
Bobby


From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Jonathan Crawford
Sent: Monday, June 13, 2005 11:29 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: normalized supercharger?

I'm not sure power really matters in the configuration we are discussing... if you were going to boost, then yes it might be important, but in normalizing situations having extra power is just wasted, cause you are only maintaining ~30" manifold. The Whipple superchargers are also more fragile, they require a very solid mounting due to the internal clearances of the blower, if you do not have a good mounting the case will flex and the screws will decide to become one with the housing, which is one failure mode I do not want to even consider since it throws bits of the blower into the engine.
 
Jonathan

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of rijakits
Sent: Monday, June 13, 2005 9:49 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: normalized supercharger?

Bobby,
before you pluck down the money for the Eaton, check out the Whipple/KenneBell/Lysholm.
In the last 5.0-Mustang mag (sometimes I fall back to old habits, sorry....  :) ), there was an advertisement for a KenneBell setup as a direct replacement for the Eaton ( there was some factory offer with a Eaton charger, probably from the Motorsports department...), which claims more power/efficiency with the same setup (bolt in...)
I know that the Whipple is pricier than the Eaton, but not that much!
 
Thomas J
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