Return-Path: <13brv3@bellsouth.net> Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2637622 for flyrotary@lancaironline.net; Wed, 15 Oct 2003 09:38:35 -0400 Received: from rad ([68.212.14.231]) by imf19aec.mail.bellsouth.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20031015133834.NNLW1828.imf19aec.mail.bellsouth.net@rad> for ; Wed, 15 Oct 2003 09:38:34 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: EWP - series pumps and wacky ideas Date: Wed, 15 Oct 2003 08:38:32 -0500 Message-ID: <000001c39321$a10d67c0$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C392F7.B8375FC0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C392F7.B8375FC0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Tonight, while descending from 9500' I kept the controller bypassed = allowing the pump to flow at full speed. I found that it cooled off so that the = hot coolant out of the engine was below the bottom scale of the gauge (<50C) = and coolant press was 0psi. Then when I entered the circuit and applied = power, it ran rough until it warmed up a bit.=20 =20 Interesting. Hey Ed, Tracy, Bill (?), anyone else without a thermostat- what sort of temps do you guys see when making a long low power descent? = =20 =20 Also, where is your pressure sensor Todd? It must be after the engine, = and before the pump. I will probably try to put a sensor somewhere = downstream of the pump, so I can see that it's producing flow/pressure. =20 =20 I take my temps at the adapter block measuring temps in and out. It = would seem to me that the temp at the rear sensor fitting would be a little = cooler as the coolant has only gone half way through the engine. However as you imply, it may have already seen the hottest parts. =20 =20 I agree that the water exit at your adapter plate will normally be the hottest point, but that's when water is flowing. My point was to put a sensor as close to the hottest part of the water jacket, so you would = see the temp rise sooner if the water flow stops. For normal operation, a = 95C switch might (?) trigger too late in this rear sensor fitting, but you = can get switches that work at different temps. =20 =20 All great info Todd. Thanks. Rusty =20 =20 =20 ------=_NextPart_000_0001_01C392F7.B8375FC0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Tonight, while descending = from 9500' I=20 kept the controller bypassed allowing the pump to flow at full speed. I = found=20 that it cooled off so that the hot coolant out of the engine was below = the=20 bottom scale of the gauge (<50C) and coolant press was 0psi. = Then when I=20 entered the circuit and applied power, it ran rough until it warmed = up a=20 bit. 
 
Interesting.  Hey Ed, Tracy, Bill (?), = anyone else=20 without a thermostat- what sort of temps do you guys see when making a = long low=20 power descent? =20
 
Also, where is your pressure sensor = Todd?  It must=20 be after the engine, and before the pump.  I will probably try to = put a=20 sensor somewhere downstream of the pump, so I can see that it's = producing=20 flow/pressure.    =20
 
 I take my = temps at the=20 adapter block measuring temps in and out. It would seem to me that the = temp at=20 the rear sensor fitting would be a little cooler as the coolant has only = gone=20 half way through the engine. However as you imply, it may have already = seen the=20 hottest parts.  
 
I = agree that the=20 water exit at your adapter plate will normally be the hottest point, but = that's=20 when water is flowing.  My point was to put a sensor as close = to the=20 hottest part of the water jacket, so you would see the temp = rise=20 sooner if the water flow stops.  For normal operation, a 95C switch = might=20 (?)  trigger too late in this rear sensor fitting, but you can get = switches=20 that work at different=20 temps.   
 
All = great info=20 Todd.  Thanks.
Rusty
 
 
 
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