Return-Path: <13brv3@bellsouth.net> Received: from imf21aec.mail.bellsouth.net ([205.152.59.69] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 369780 for flyrotary@lancaironline.net; Wed, 18 Aug 2004 12:30:46 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.69; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf21aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040818163016.NAQW1792.imf21aec.mail.bellsouth.net@rd> for ; Wed, 18 Aug 2004 12:30:16 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Supercharger (was Compressor maps) Date: Wed, 18 Aug 2004 11:30:25 -0500 Message-ID: <029401c48540$aa678a50$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0295_01C48516.C1918250" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0295_01C48516.C1918250 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable > For the moment, the lack of static RPM is the only thing keeping me > from departing the left side of the runway :-) =20 That sounds reminiscent of the problems F4U drivers had. You might want to look up the development history of the Corsair, and see if it offers any useful insights. Dale R. Someone told me that the P-51 was the same way, and that you can't use = full throttle on takeoff. I think I know the solution, but I'm not sure I = want to do it. My mount currently has left offset, which used to be a good = thing with the B drive. Now that the C drive gives me left engine torque, = having a left offset in the mount is exactly wrong. I wanted to see how bad it = was first, then decide what to do. =20 =20 The first option is to shim the mount to the right, enough to zero out = the torque. That's as far as I dare shim it, and it will require me to reposition the cowl, which makes me itch to think of the fiberglass = work. The better option is to make, or have made, a new mount, but I just = can't face the thought of doing that now. =20 =20 Rusty (off to check my EC-2 MAP cal) ------=_NextPart_000_0295_01C48516.C1918250 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

> For the moment, the lack of static RPM is the = only thing=20 keeping me
> from departing the left side of the runway=20 :-)
 
   That sounds reminiscent of the problems = F4U=20 drivers had.
You might want to look up the development history of=20 the
Corsair, and see if it offers any useful insights.

Dale=20 R.

Someone = told me that the=20 P-51 was the same way, and that you can't use full throttle on = takeoff.  I=20 think I know the solution, but I'm not sure I want to do it.  My = mount=20 currently has left offset, which used to be a good thing with the B = drive. =20 Now that the C drive gives me left engine torque, having a left offset = in the=20 mount is exactly wrong.  I wanted to see how bad it was first, then = decide=20 what to do. 
 
The = first option is to=20 shim the mount to the right, enough to zero out the torque.  That's = as far=20 as I dare shim it, and it will require me to reposition the cowl, which = makes me=20 itch to think of the fiberglass work.  The better option is to = make, or=20 have made, a new mount, but I just can't face the thought of doing that=20 now. 
 
Rusty = (off to check my=20 EC-2 MAP cal)



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