Return-Path: Received: from [65.54.168.111] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 761252 for flyrotary@lancaironline.net; Sun, 27 Feb 2005 00:21:46 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.168.111; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sat, 26 Feb 2005 21:21:00 -0800 Message-ID: Received: from 4.171.174.233 by BAY3-DAV7.phx.gbl with DAV; Sun, 27 Feb 2005 05:20:45 +0000 X-Originating-IP: [4.171.174.233] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] A little down on power Date: Sun, 27 Feb 2005 00:20:43 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_009D_01C51C62.2C9F3050" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Sun, 27 Feb 2005 00:20:43 -0500 X-OriginalArrivalTime: 27 Feb 2005 05:21:00.0140 (UTC) FILETIME=[1F9E62C0:01C51C8C] This is a multi-part message in MIME format. ------=_NextPart_000_009D_01C51C62.2C9F3050 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable In order of significance, here are my impressions. 1. That "shudder a bit" gives me the shudders. I think that is = detonation. =20 2. Turbo engine + high compression rotors + 87 octane fuel. YIKES!!!! = (see #1 above) 3. Ever driven your car up a steep hill in high gear? You may have = noticed that you get no increase in power at full throttle than you get = at half throttle. Your prop is way too steep. Tracy I wonder if any of you expert Wanklers could comment on my latest = issue..... My turbo REW engine now starts almost instantly and runs very smoothly = at all rpm ranges. There's little if any soot on the prop so long as I = don't run too rich on take-off. My static used to be 4050. Lately it's = been in the 3900's with 46 MAP. More MAP (I tried briefly up to 50 = today) doesn't do a damn thing. There's plenty of power to take-off and = climb, but not as much as I had way back when before a thousand changes = because of which I can't pinpoint when the power changed. Could be = fairly recent (in terms of hours) and after the new turbo was fitted. = Could be partially a result of the hi-flow turbo, but I think not all. I've never been able to get any more power past a certain throttle = position. Its as though I get to a certain point, then more throttle and = boost just makes it shudder a bit, so I back off. That "there aint no = more" point on the throttle seems to be coming back toward the idle :) = I've also noticed that shutting off the primary injectors almost kills = the engine. If I struggle with it I CAN keep it running, but only just. I'm currently flying on 87 Octane. Could this be impacting my ability = to produce power this much? I'm working my way through the possible = octanes to see how she behaves so as not to get caught out later. The = next tankful will be 91, then 100LL. I've tried clean (not new) plugs. = That's my next experiment. Any other thoughts or suggestions welcome. John (flying, but not climbing as fast as I'd like) ------=_NextPart_000_009D_01C51C62.2C9F3050 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

In order of significance, here are my impressions.

1. That "shudder a bit" gives me the shudders. I = think=20 that is detonation.

2. Turbo engine + high compression rotors + 87 octane=20 fuel. YIKES!!!! (see #1 above)

3. Ever driven your car up a steep hill in high gear? = You may=20 have noticed that you get no increase in power at full throttle than you = get at=20 half throttle. Your prop is way too steep.

Tracy

I = wonder if any of=20 you expert Wanklers could comment on my latest = issue.....

My = turbo=20 REW engine now starts almost instantly and runs very smoothly at = all rpm=20 ranges. There's little if any soot on the prop so long as I don't run = too rich=20 on take-off. My static used to be 4050. Lately it's been in the=20 3900's with 46 MAP. More MAP (I tried briefly up to 50 today) = doesn't do=20 a damn thing. There's plenty of power to take-off and climb, but not = as much=20 as I had way back when before a thousand changes because of which I = can't=20 pinpoint when the power changed. Could be fairly recent (in terms of=20 hours) and after the new turbo was fitted. Could be partially a = result of=20 the hi-flow turbo, but I think not all.

I've = never been=20 able to get any more power past a certain throttle position. Its as = though I=20 get to a certain point, then more throttle and boost just makes it = shudder a=20 bit, so I back off. That "there aint no more" point on the = throttle seems=20 to be coming back toward the idle :) I've also noticed that shutting = off the=20 primary injectors almost kills the engine. If I struggle with it I CAN = keep it=20 running, but only just.

I'm = currently=20 flying on 87 Octane. Could this be impacting my ability to = produce power=20 this much? I'm working my way through the possible = octanes to=20 see how she behaves so as not to get caught out later. The next = tankful will=20 be 91, then 100LL. I've tried clean (not new) plugs. That's my = next=20 experiment. Any other thoughts or suggestions = welcome.

John = (flying, but=20 not climbing as fast as I'd=20 like)

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