Return-Path: Received: from server5.safepages.com ([216.127.146.2] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2588013 for flyrotary@lancaironline.net; Sun, 21 Sep 2003 13:11:43 -0400 Received: by server5.safepages.com (Postfix, from userid 1012) id B910E180AE2; Sun, 21 Sep 2003 17:09:32 +0000 (GMT) Received: from 2b0w201 (1Cust180.tnt1.pensacola2.fl.da.uu.net [67.248.205.180]) by server5.safepages.com (Postfix) with ESMTP id D39E3180B1B for ; Sun, 21 Sep 2003 17:09:30 +0000 (GMT) From: "Tommy James" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: EC2 in-flight timing adjustment. Date: Sun, 21 Sep 2003 13:12:12 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0044_01C38041.F88FA960" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0044_01C38041.F88FA960 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Tracy, More questions stirred up here...:0) 1. Will best power timing be different than best economy? 2. What would you guess the EGTs to be at best power mixture and 5000rpm 3. Is 5-6 bars on the RWS mixture meter the best power range? Thanks, Tommy <>< 1. Establish normal cruise and get the plane *perfectly* trimmed in zero turbulance air. 2. Lean engine for best economy. This is about 1525 - 1550 EGT on mine. This varies with altitude & powersetting. 3. Put EC2 in mode 8 and advance timing 1 step (1.875 degrees) and note change in rpm (a digital tach w/ <= 10 rpm resolution is a must). 4. If you got an increase at step 3, repeat until there is no increase in rpm. 5. Retard the timing 1 step. Factors to keep in mind. My cruise is typically at 17 - 18" MAP which is below the manifold pressure advance point (this point is adjustable in Mode 6). The timing is advanced by 5.625 degrees more than nominal timing which is typically 20 - 23 deg BTDC at rpm > 3600. I think mine is advanced 1 or 2 steps from default setting. Tracy ------=_NextPart_000_0044_01C38041.F88FA960 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Tracy, More questions = stirred up=20 here...:0)

1. Will best power timing be = different=20 than best economy?

2. What would you guess the = EGTs to be=20 at best power mixture and 5000rpm

3. Is 5-6 bars on the RWS = mixture=20 meter the best power range?

Thanks,

Tommy <><

1. Establish=20 normal cruise and get the plane *perfectly* trimmed in zero turbulance=20 air.

2. Lean engine for best economy. = This is about=20 1525 - 1550 EGT on mine. This varies with altitude &=20 powersetting.

3. Put EC2 in mode 8 and advance timing 1 = step=20 (1.875 degrees) and note change in rpm (a digital tach w/ <=3D 10 = rpm=20 resolution is a must).

4. If you got an increase at step 3, = repeat until=20 there is no increase in rpm.

5. Retard the timing 1 step.

Factors to keep in mind. My cruise is = typically at=20 17 - 18" MAP which is below the manifold pressure advance point = (this=20 point is adjustable in Mode 6). The timing is advanced by = 5.625=20 degrees more than nominal timing which is typically 20 - 23 deg BTDC = at rpm=20 > 3600.

I think mine is advanced 1 or 2 steps from = default=20 setting.

Tracy

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