Return-Path: <13brv3@bellsouth.net> Received: from [205.152.59.68] (HELO imf20aec.bellsouth.net) by logan.com (CommuniGate Pro SMTP 4.1b9) with ESMTP id 2474413 for flyrotary@lancaironline.net; Mon, 14 Jul 2003 09:22:57 -0400 Received: from rad ([68.212.2.79]) by imf20aec.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20030714132241.PADS27458.imf20aec.bellsouth.net@rad> for ; Mon, 14 Jul 2003 09:22:41 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: 2nd and 3rd run logs Date: Mon, 14 Jul 2003 08:22:44 -0500 Message-ID: <001f01c34a0b$02d67290$0201a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0020_01C349E1.1A006A90" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0020_01C349E1.1A006A90 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable 1. Have you been running the engine without a prop? If not, I don't = think you will get dependable readings or adjustments. =20 The 3 blade Warp Drive prop is installed and set at 18 degrees pitch. =20 3. Tracy's specs for timing (with the static timing set of 35*BTC) are: 1500-2499=3D 10.625*BTC, 2500-3599=3D18.5*BTC, and >3600=3D 21.875BTC. = Also, low MAP(<22") will advance 5.625* when above 3600r. If it were me, I'd = reset the static set up and check timing at 3500-4000. =20 This is good info, thanks. Something doesn't add up, since I started = with a static of 35 BTDC, and had 0 TDC at about 2500 rpm. Now, I have about = 19 BTDC at 2500, so that could be right where it needs to be. Unless Tracy suggests otherwise, I'll probably do as you suggest, and set it back to = the static setting, and wait until I'm able to run it up to 4000 as stated = in the instructions. It would be safer to have the timing retarded, than over-advanced. Detonation is not good for apex seals. =20 =20 If Tracy confirms the low power cut-off with the primary injector = switch, I'll be at the airport by Saturday :-) =20 Rusty =20 ------=_NextPart_000_0020_01C349E1.1A006A90 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

1. Have you been running the = engine without a prop?  If not, I don't think you will get dependable = readings or adjustments.

 

The 3 blade Warp Drive prop is = installed and set at 18 degrees pitch.

 

3.  Tracy's specs for timing (with the static timing set of 35*BTC) are:  1500-2499=3D 10.625*BTC, 2500-3599=3D18.5*BTC, and >3600=3D = 21.875BTC.  Also, low MAP(<22")  will advance 5.625* when above 3600r.  = If it were me, I'd reset the static set up and check timing at = 3500-4000.

 

This is good info, thanks.  = Something doesn’t add up, since I started with a static of 35 BTDC, and had = 0 TDC at about 2500 rpm.  Now, I have about 19 BTDC at 2500, so that = could be right where it needs to be.  Unless Tracy suggests otherwise, I’ll probably do as you suggest, = and set it back to the static setting, and wait until I’m able to run it = up to 4000 as stated in the instructions.  It would be safer to have the = timing retarded, than over-advanced.  Detonation is not good for apex seals. 

 

If Tracy confirms the low power cut-off with the primary injector = switch, I’ll be at the airport by Saturday :-)

 

Rusty

 

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