Return-Path: <13brv3@bellsouth.net> Received: from imf25aec.mail.bellsouth.net ([205.152.59.73] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3139545 for flyrotary@lancaironline.net; Wed, 31 Mar 2004 21:20:41 -0500 Received: from rad ([65.0.147.162]) by imf25aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040401022025.UPVA1763.imf25aec.mail.bellsouth.net@rad> for ; Wed, 31 Mar 2004 21:20:25 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Requesting more thoughts on cooling Date: Wed, 31 Mar 2004 20:22:30 -0600 Message-ID: <009501c41790$2f8325b0$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0096_01C4175D.E4E8B5B0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0096_01C4175D.E4E8B5B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I'm signed off and ready to fly,=20 =20 Congrats. Do you 13B drivers tend to just taxi out at low rpm then launch? Would = your engine overheat if you did a 15 minute medium power runup? I'd = appreciate any general thoughts, or comments on how much ground running I should = expect to get away with before the temps get too high. Anything else I should check? =20 I'm not really sure that it takes to shut off the bypass hole in a 3rd = gen housing. Can you just tap it, and screw in a plug like we do in the 2nd = gen housings? It would be nice to end up with the ability to run a = thermostat if you later want to. Perhaps you could pick up a spare housing, and = have one welded, and the other open. Not the most convenient way to swap a thermostat in and out though. =20 =20 If you want to hedge your bets, I would suggest no thermostat, plain distilled water, and the highest pressure cap you can find. Getting to = the runway without any excess heat would be a good plan also. Your plane = should be very efficient, and should get you around the pattern at very low throttle once you get some altitude. Once you have some airspeed, and reduce power, the cooling system should recover quickly from any excess = heat that built up (if any). I think it's wise to "plan" to make the first flight a brief trip around the pattern, then continue the flight longer = if cooling is working well. Unfortunately, a quick trip around the = pattern is probably not the best overall first flight test schedule, but it becomes = far better than overheating :-) =20 =20 As for cooling on the ground, I don't seem to be in any danger of overheating on the ground, but you're a a severe disadvantage since your prop is on the wrong end of the plane. I just can't imagine that you = get nearly the same airflow from the prop that tractor configurations do. = Aside from Perry, is there another pusher flying?=20 =20 Good luck. My second first flight should happen this weekend. =20 Rusty (NOT being laid off now. Philips gave me the local job I wanted = with 45 minutes to spare) =20 ------=_NextPart_000_0096_01C4175D.E4E8B5B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
I'm signed off and ready to fly,=20
 
Congrats.


Do you 13B drivers tend to just taxi out at low rpm then = launch?=20 Would your engine overheat if you did a 15 minute medium power runup? = I'd=20 appreciate any general thoughts, or comments on how much ground running = I should=20 expect to get away with before the temps get too high. Anything else I = should=20 check?
 

I'm not really sure that it = takes to shut=20 off the bypass hole in a 3rd gen housing.  Can you just tap it, and = screw=20 in a plug like we do in the 2nd gen housings?  It would be nice to = end up=20 with the ability to run a thermostat if you later want to.  Perhaps = you=20 could pick up a spare housing, and have one welded, and the other=20 open.  Not the most convenient way to swap a thermostat = in and=20 out though.  
 
If you want to hedge your bets, I = would suggest=20 no thermostat, plain distilled water, and the highest pressure cap=20 you can find.  Getting to the runway without = any excess heat=20 would be a good plan also.  Your plane should be very efficient, = and should=20 get you around the pattern at very low throttle once you get some=20 altitude.  Once you have some airspeed, and reduce power,=20 the cooling system should recover quickly from any excess heat that = built=20 up (if any).  I think it's wise to "plan" to make the first = flight a=20 brief trip around the pattern, then continue the flight longer if = cooling=20 is working well.   Unfortunately, a quick trip around the = pattern is=20 probably not the best overall first flight test schedule, but it becomes = far=20 better than overheating :-)   
 
As for cooling on the ground, I = don't seem=20 to be in any danger of overheating on the ground, but you're a a severe=20 disadvantage since your prop is on the wrong end of the = plane.  I just=20 can't imagine that you get nearly the same airflow from the prop that = tractor=20 configurations do.  Aside from Perry, is there another pusher=20 flying? 
 
Good luck.  My second first = flight should=20 happen this weekend.
 
Rusty (NOT being laid off now.  = Philips=20 gave me the local job I wanted with 45 minutes to = spare)   =20
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