Todd,
High wing or low wing? The key is if you have a high wing there is at least a minimum pressure available. Anything aerobatic or low wing will need pumps.
Bill JepsonSent from my Verizon Wireless BlackBerry
From: "Todd Archer" <archerwt@gmail.com>
Date: Wed, 5 May 2010 18:52:47 -0700 To: Rotary motors in aircraft<flyrotary@lancaironline.net> Subject: [FlyRotary] Gravity Feed
Anyone who knows feel free to explain to me why a
Marvel-Schebler updraft can feed 300 hp with gravity but pumps are needed for Webers
or Holleys. I understand the updraft gets another 18” of pressure
but am assuming it is simply by design that the response is improved with a few
lbs of pressure. Since we aren’t too worried about throttle
response as long as it doesn’t stumble, would a gravity-fed Holley be a
waste of time?
Todd
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