X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.4.51.84] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTP id 611848 for flyrotary@lancaironline.net; Fri, 22 Jul 2005 15:16:19 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.4.51.84; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 22 Jul 2005 12:15:33 -0700 Message-ID: Received: from 64.4.51.220 by BAY107-DAV12.phx.gbl with DAV; Fri, 22 Jul 2005 19:15:33 +0000 X-Originating-IP: [64.4.51.220] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: A - B conversion / speed mod test Date: Fri, 22 Jul 2005 15:15:28 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0043_01C58ED0.31CDCD80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Fri, 22 Jul 2005 15:15:28 -0400 X-OriginalArrivalTime: 22 Jul 2005 19:15:33.0892 (UTC) FILETIME=[BBCC5440:01C58EF1] This is a multi-part message in MIME format. ------=_NextPart_000_0043_01C58ED0.31CDCD80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message ----- Original Message -----=20 From: John Slade=20 To: Rotary motors in aircraft=20 Sent: Wednesday, July 20, 2005 6:44 PM Subject: [FlyRotary] Re: I must be crazy an A drive on that turbo engine? 46" of manifold pressure! =20 Oh my ache'n head. 46? You think I should cut it back all of 10 PSI? :) OK. We did discuss this earlier, but I think it's time..... How much for the upgrade to B, and when can I have it? John Me and my big mouth - I'll have to figure that out after I get back = from Osh.=20 Won't be as expensive as a B to C conversion where all the guts are = changed. That's about a kilobuck. Flight tested the coil replacement and wingtip mod. Also put a temp = probe near the coils to see what it was there. Yikes! 170 F. OAT was = about 95 F. Alternator was probably seeing about the same. I think I = recommended 135 F or less for both in the EC2 installation guide. I = think the coil failure was my fault in this case, didn't follow my own = rule. The higher under cowl temps are a result of the higher coolant = temps on the Renesis. See website for details on this and why this does = not mean you have to have a bigger rad.=20 FWIW, I recently noticed on Laura's BMW that there is a blast tube = feeding a shroud at the air inlet side of the alternator. Also noticed = that at 130 mph it gets about 8 mpg while the RV-4 gets about 30 at the = same speed, and that's down near sea level. Pretty amazing efficiency! The wingtip mod is a keeper. I was too nervous about the coil & = alternator temps to do extensive testing but if the improvement can be = noticed at all, it's a good one. Most improvements are so small that = it takes very careful measurements over several flights to be sure they = are real. If the weather had been cool rather than hot I would not be = so quick to say the improvement was real. =20 Most speed mods offer very little benefit at climb & economy cruise = settings but this one is different. In fact, the higher the AOA, the = more this one helps. Roll response at low airspeed seems crisper too. Tracy (installing cooling plenum for coils & alternator) ------=_NextPart_000_0043_01C58ED0.31CDCD80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
 
----- Original Message -----
From: John=20 Slade
To: Rotary motors in = aircraft
Sent: Wednesday, July 20, 2005 = 6:44=20 PM
Subject: [FlyRotary] Re: I must = be=20 crazy

an A drive on that turbo engine?  46" of manifold=20 pressure!  
Oh my ache'n head.
46? You = think I should=20 cut it back all of 10 PSI?  :)
 
OK. We did = discuss=20 this earlier, but I think it's time.....
How much = for the=20 upgrade to B, and when can I have it?
John
 
 
Me and my big mouth -  I'll have to figure that out after I = get back=20 from Osh. 
 
 Won't be as expensive as a B to C conversion where all the = guts are=20 changed.  That's about a kilobuck.
 
 Flight tested the coil replacement and wingtip mod.  = Also put=20 a temp probe near the coils to see what it was there.   = Yikes! =20 170 F.  OAT was about 95 F.  Alternator was probably seeing = about=20 the same.  I think I recommended 135 F or less for both = in the=20 EC2 installation guide.  I think the coil failure was my fault in = this=20 case, didn't follow my own rule.  The higher under cowl temps are = a=20 result of the higher coolant temps on the Renesis.  See website = for=20 details on this and why this does not mean you have to have a bigger=20 rad. 
 
FWIW,  I recently noticed on Laura's BMW that there is a = blast tube=20 feeding a shroud at the air inlet side of the alternator.  = Also=20 noticed that at 130 mph it gets about 8 mpg while the RV-4 gets about = 30 at=20 the same speed, and that's down near sea level.  Pretty amazing=20 efficiency!
 
The wingtip mod is a keeper.  I was too nervous about the = coil &=20 alternator temps to do extensive testing but if the improvement can be = noticed=20 at all, it's a good one.   Most improvements are so small = that it=20 takes very careful measurements over several flights to be sure they = are=20 real.  If the weather had been cool rather than hot I would not = be so=20 quick to say the improvement was real. 
 
Most speed mods offer very little benefit at climb & = economy=20 cruise settings but this one is different.  In fact, the higher = the AOA,=20 the more this one helps.  Roll response at low airspeed = seems=20 crisper too.
 
Tracy  (installing cooling plenum for coils &=20 alternator)
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