REFLECTOR:MORE ON COMBUSTION AIR AND COOLING

[Tom Martino]

So what is the conclusion?  Top (off NACAs) or bottom (with scoop)???

-----Original Message-----
From: RJohn15183@aol.com [mailto:RJohn15183@aol.com]
Sent: Tuesday, September 16, 2003 10:17 AM
To: reflector@tvbf.org
Subject: Re: REFLECTOR:MORE ON COMBUSTION AIR AND COOLING


In a message dated 9/16/2003 11:04:31 AM Eastern Daylight Time, scott@tnstaafl.net writes:

> Both planes I have flown with a ram scoop, Mooney and 
> Velocity, showed about 3/4" of MP increase at apx 150 knots.

Yes, I thought Jim had made a very good point a few e-mails back that where I was originally drawing intake air from before I built the scoop must have been in negative pressure air. 

Since everyone seems to agree that 3/4 of an inch is about right for a ram air scoop that must mean I was loosing about  1.25 inches by drawing from where I was, under the engine with no scoop. 

So lesson learned: Think about where you put that engine intake! It can cost you significant power. 

DM Rob

_______________________________________________
To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector

Visit the gallery!  www.tvbf.org/gallery
user:pw = tvbf:jamaicangoose
Check new archives: www.tvbf.org/pipermail
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html