Return-Path: <13brv3@bellsouth.net> Received: from imf20aec.mail.bellsouth.net ([205.152.59.68] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 521880 for flyrotary@lancaironline.net; Sun, 07 Nov 2004 19:10:14 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.68; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf20aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041108000943.UYPW2350.imf20aec.mail.bellsouth.net@rd> for ; Sun, 7 Nov 2004 19:09:43 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: EWP Date: Sun, 7 Nov 2004 18:09:56 -0600 Message-ID: <000001c4c527$47492970$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4C4F4.FCAEB970" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C4C4F4.FCAEB970 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Rusty I don't see, how more cooling flow at low rpm will cool better, = there is still no change in radiator-size/airflow/etc.=20 =20 It's pretty well established that more flow equals better cooling. I'm = not qualified to explain it, but plenty of people here are, and you can = probably find ton's of info in the archives. =20 =20 no cavitation at high rpm: use underdrive pulleys=20 =20 And make the low rpm overheating worse. =20 and maintain the belts in correct alignmentand tension and you will = never loose one..........:)=20 =20 I'd be more or less willing to agree with this. If I had a factory set = of pulleys, accessory mounts, and adjustment arms, I wouldn't be as = worried. Unfortunately, many of us are forced to make our own accessory mounts. = I've even had to use a pulley that needed to be modified to fit the shaft on = my alternator. The chances of a failure with these added variables is far = more likely than stock, and as I mentioned, broken or thrown belts have = stranded me on two occasions, both in factory applications. =20 =20 (I have abour 5000 hrs flying time in front of belts double-v-typ as = the only means of powertransfer from the engine to the rotor....)=20 =20 How much do you think Robinson spent developing that v-belt drive? It = had better work :-) =20 =20 Cheers, Rusty (I hate belts, and they hate me)=20 ------=_NextPart_000_0001_01C4C4F4.FCAEB970 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Rusty I don't see, = how more=20 cooling flow at low rpm will cool better, there is still no change in=20 radiator-size/airflow/etc. 
 
It's pretty well established that more flow = equals=20 better cooling.  I'm not qualified to explain it, but plenty = of people=20 here are, and you can probably find ton's of info in the=20 archives.  
 
 no cavitation at high rpm: use = underdrive=20 pulleys 
 
And make the low rpm overheating=20 worse.
 
 and maintain the belts in = correct=20 alignmentand tension and you will never loose = one..........:) 
 
I'd be more or less willing to agree with = this. =20 If I had a factory set of pulleys, accessory mounts, and adjustment = arms, I=20 wouldn't be as worried.  Unfortunately, many of us are forced = to make=20 our own accessory mounts.  I've even had to use a pulley = that needed=20 to be modified to fit the shaft on my alternator.  The chances = of a=20 failure with these added variables is far more likely than stock, and as = I=20 mentioned, broken or thrown belts have stranded me on two = occasions,=20 both in factory = applications.   
 
 (I have abour 5000 hrs flying = time in=20 front of belts double-v-typ as the only means of powertransfer from the = engine=20 to the rotor....) 
 
How much do you think Robinson spent = developing=20 that v-belt drive?  It had better work=20 :-)  
 
Cheers,
Rusty (I hate belts, and they hate=20 me) 
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