Sent: Tue, 18 Dec 2007 8:31 am Subject: [FlyRotary] Re: Supercharging wrjjrs@aol.com wrote:? > Greg,? > Superchargers are sometimes simpler to implement, but there are other > reasons they aren't as popular on aircraft. First they are a power > robbing device. There is a net gain in power of course, but the > charger can require 10-15 HP to drive it at WOT and it makes the > engine less efficient. The other problem is you must be sure the unit > is up to continous use in the boost RPM range. Lastly the mount must > be solid enough to hold up to continous use as well.? > Bill Jepson Doesn't the same apply to all intake charging devices?? ? --? Homepage: http://www.flyrotary.com/? Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html? ________________________________________________________________________ More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com ----------MB_8CA0FC4E626BDA2_E14_7E9B_WEBMAIL-DG02 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset="us-ascii"

Ernest, No that isn't true. I agree that any supercharging method certainly adds complication. The MAJOR difference is that a SUPERcharger, rather than a turbo requires additional careful engineering to enable the DRIVE for the blower to survive. A turbo must be mounted itself, but the drive is simple, even if the plumbing isn't.

Cheers,

Bill

-----Original Message-----
From: Ernest Christley <echristley@nc.rr.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, 18 Dec 2007 8:31 am
Subject: [FlyRotary] Re: Supercharging

wrjjrs@aol.com wrote:
> Greg,
> Superchargers are sometimes simpler to implement, but there are other > reasons they aren't as popular on aircraft. First they are a power > robbing device. There is a net gain in power of course, but the > charger can require 10-15 HP to drive it at WOT and it makes the > engine less efficient. The other problem is you must be sure the unit > is up to continous use in the boost RPM range. Lastly the mount must > be solid enough to hold up to continous use as well.
> Bill Jepson Doesn't the same apply to all intake charging devices?

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