Return-Path: Received: from [161.88.255.140] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WebUser 4.2.5) with HTTP id 584505 for lml@lancaironline.net; Thu, 30 Dec 2004 14:49:09 -0500 From: "Marvin Kaye" Subject: Re: [LML] Re: RAM, SLAM, BAM - MAP, WHAP, ZAP - HUH? To: lml X-Mailer: CommuniGate Pro WebUser Interface v.4.2.5 Date: Thu, 30 Dec 2004 14:49:09 -0500 Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1252"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "George Braly" : Yes... works for both, but there is no such thing as "critical altitude" for a normally aspirated engine. That concept is defined for turbo-supercharged engines as being the altitude at and above which the system is no longer able to maintain 100% of its rated manifold pressure. Regards, George > Isn't the "improve the critical altitude" concept also true for normally > aspirated engines? Say if you normally cruise at 75% power... and you > are at 5000 ft at 24X24 and you pull the ram air...your MAP goes up 1.5 > inches...in order to get back to 75% you pull the MAP back 1.5 inches to > 24??? So the advantage is above 8000 ft. Right? [ or running more than 75% power -Rob :-)