X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3350030 for flyrotary@lancaironline.net; Tue, 09 Dec 2008 01:08:12 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta02.mail.rr.com with ESMTP id <20081209015801.DEOV27302.cdptpa-omta02.mail.rr.com@computername> for ; Tue, 9 Dec 2008 01:58:01 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Update ... Three more flights, water ok, oil too cool Date: Mon, 8 Dec 2008 20:58:07 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0043_01C95977.ABD9D590" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-Reply-To: Thread-Index: AclZgnf1gZW2fBQPSiWGJ09XD8JzuQAHT5Vg X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Message-Id: <20081209015801.DEOV27302.cdptpa-omta02.mail.rr.com@computername> This is a multi-part message in MIME format. ------=_NextPart_000_0043_01C95977.ABD9D590 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Neil, Yes, I recall that you and Jim did use a thermostat plugs up with no problem. I found burping the block (actually my cores) necessary even without a thermostat. It could be that I did it the same number of times I did without the thermostat and that was insufficient. I normally would run the engine 5000 rpm for 30-40 seconds to burp the air. Would need to do this about 3 times before I got all the air out of my cores. Because of my ignorance of all factors early on when designing the plumbing for the cores, I had both inlet and outlet on the bottom - not conducive to getting air out of the cores. So should have one tube going in the bottom and the other out the top or both out the top or at least a spigot on top to release the air as the tanks filled. You know - the old "should have, could have, would have - but didn't". Now it's just simpler to burp the engine three times on the infrequent occasions I drain the coolant. I agree that slower moving airframes benefit more from thinner cores. However, if you have sufficient dynamic pressure to force air through thicker cores they can function very well even though -as you point out - the are technically less efficient. The 190 MPH NASCAR radiators are a nominal 3" thick and on the long tracks with lot of straight runs can be as much as 6-7 inches thick. But, the thicker cores do require dynamic pressure - and low speed flight or sitting on the ground does not provide much of it {:>) Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of neilak@sympatico.ca Sent: Monday, December 08, 2008 5:14 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Update ... Three more flights, water ok, oil too cool Ed, Jim and I both ran thermostats, plugs up. Summer or winter, No problem. Burping the block was mandatory. NeilK "snip" I have tried using a thermostat on two occasions and almost fired my engine on the ground. I am not certain but because I am plugs up, I think I may trap some air around the thermostat stopping it from heating up and opening __________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ------=_NextPart_000_0043_01C95977.ABD9D590 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi = Neil,

 

Yes, I recall that you and Jim did = use a thermostat plugs up with no problem.  I found burping the block = (actually my cores)  necessary even without a thermostat.  It could be = that I did it the same number of times I did without the thermostat and that = was insufficient.

 

I normally would run the engine = 5000 rpm for 30-40 seconds to burp the air.  Would need to do this about 3 = times before I got all the air out of my cores.  Because of my ignorance = of all factors early on  when designing the plumbing for the cores, I had = both inlet and outlet on the bottom – not conducive to getting air out = of the cores. 

 

So should have one tube going in = the bottom and the other out the top or both out the top or at least a = spigot on top to release the air as the tanks filled. =

 

You know – the old = “should have, could have, would have -  but didn’t”.  Now = it’s just simpler to burp the engine three times on the infrequent occasions = I drain the coolant.

 

I agree that slower moving = airframes benefit more from thinner cores. However, if you have sufficient dynamic pressure to force air through thicker cores they can function very well = even though  -as you point out - the are technically less = efficient.  The 190 MPH NASCAR radiators are a nominal 3” thick and on the long = tracks with lot of straight runs can be as much as 6-7 inches thick.  But, = the thicker cores do require dynamic pressure - and low speed flight or = sitting on the ground does not provide much of it = {:>)

 

Ed

Ed Anderson

Rv-6A N494BW Rotary = Powered

Matthews, NC

eanderson@carolina.rr.com=

http://www.andersonee.com

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.dmack.net/mazda/index.html<= font size=3D2 face=3DArial>

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of neilak@sympatico.ca
Sent: Monday, December = 08, 2008 5:14 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Update ... Three more flights, water ok, oil too = cool

 

Ed,

 

      =       Jim and I both ran thermostats, plugs up.  Summer or winter, No problem.  Burping the block was = mandatory.

 

NeilK

 

 

“snip”=

 

I have tried using a thermostat on two occasions and almost = fired my engine on the ground.  I am not certain but because I am plugs up, = I think I may trap some air around the thermostat stopping it from heating up = and opening



__________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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