X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-da02.mx.aol.com ([205.188.105.144] verified) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTP id 4127794 for flyrotary@lancaironline.net; Wed, 17 Feb 2010 01:12:52 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.105.144; envelope-from=WRJJRS@aol.com Received: from imo-da02.mx.aol.com (imo-da02.mx.aol.com [205.188.169.200]) by imr-da02.mx.aol.com (8.14.1/8.14.1) with ESMTP id o1H6C58b012580 for ; Wed, 17 Feb 2010 01:12:05 -0500 Received: from WRJJRS@aol.com by imo-da02.mx.aol.com (mail_out_v42.9.) id q.cb5.64adca54 (34920) for ; Wed, 17 Feb 2010 01:12:00 -0500 (EST) Received: from magic-d14.mail.aol.com (magic-d14.mail.aol.com [172.19.187.159]) by cia-da03.mx.aol.com (v127.7) with ESMTP id MAILCIADA035-88684b7b88b0d3; Wed, 17 Feb 2010 01:12:00 -0500 From: WRJJRS@aol.com Message-ID: <22cc0.57a9d422.38ace2b0@aol.com> Date: Wed, 17 Feb 2010 01:12:00 EST Subject: Re: [FlyRotary] Re: Air Pump To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_22cc0.57a9d422.38ace2b0_boundary" X-Mailer: 9.0 SE for Windows sub 5046 X-AOL-ORIG-IP: 75.211.114.49 X-AOL-IP: 172.19.187.159 X-Spam-Flag:NO X-AOL-SENDER: WRJJRS@aol.com --part1_22cc0.57a9d422.38ace2b0_boundary Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en =20 In a message dated 2/16/2010 8:46:33 PM Pacific Standard Time, =20 rv-4mike@cox.net writes: Dennis, =20 First let me say that you and your brother apparently have too much spar= e=20 time on your hands (just kidding!). Actually I'm pretty impressed that=20 you'd take the time to do this and document it. =20 Having said that, I think Al makes a couple of good points - you could= =20 conceivably make up a significant amount of the measured difference with= a=20 good ram air system in flight. =20 And finally, while you are right - that you cant buy much of a turbo for= =20 $500, it wouldn=E2=80=99t take much of a turbo to get an additional 1.2".= This=20 looks like a lot of work ( and added complexity, failure modes, etc...)= for not=20 a lot of payoff. =20 Mike Guys,=20 There are a lot of schemes using an alternate source to provide boost. One= =20 that comes to my mind was used on a White Lightning that tried to run in= =20 one of the first Sport Class races at Reno. They used a conventional=20 supercharger driven by a small 2-cycle taken from a kart. They never got= this=20 complex system to work safely. While turbochargers are expensive and cost= ly they=20 are the best way to recover lost energy from the exhaust and make the=20 engine and aircraft more efficient. I don't mean to be a wet blanket, but= if=20 you want to go faster using another engine, build a twin! Bill Jepson --part1_22cc0.57a9d422.38ace2b0_boundary Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en <= FONT id=3Drole_document face=3DArial color=3D#000000 size=3D2>
In a message dated 2/16/2010 8:46:33 PM Pacific Standard Time,=20 rv-4mike@cox.net writes:
Dennis,
 
 First let me say that you and your broth= er=20 apparently have too much spare time on your hands (just kidding!). Actua= lly=20 I'm pretty impressed that you'd take the time to do this and docume= nt=20 it.
 
 Having said that, I think Al makes a cou= ple of=20 good points - you could conceivably make up a significant amount of= the=20 measured difference with a good ram air system in flight.
 
 And finally, while you are right - that= you cant=20 buy much of a turbo for $500, it wouldn=E2=80=99t take much of a turbo= to get an=20 additional 1.2". This looks like a lot of work ( and added complexity,= failure=20 modes, etc...) for not a lot of payoff.
 
Mike
Guys,
There are a lot of schemes using an alternate source to provide boost= . One=20 that comes to my mind was used on a White Lightning that tried to run in= one of=20 the first Sport Class races at Reno. They used a conventional supercharger= =20 driven by a small 2-cycle taken from a kart. They never got this complex= system=20 to work safely. While turbochargers are expensive and costly they are the= best=20 way to recover lost energy from the exhaust and make the engine and aircra= ft=20 more efficient. I don't mean to be a wet blanket, but if you want to go fa= ster=20 using another engine, build a twin!
Bill Jepson
--part1_22cc0.57a9d422.38ace2b0_boundary--