Return-Path: Received: from [199.185.220.223] (HELO priv-edtnes28.telusplanet.net) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2903624 for flyrotary@lancaironline.net; Wed, 24 Dec 2003 01:46:52 -0500 Received: from Endurance ([209.53.248.124]) by priv-edtnes28.telusplanet.net (InterMail vM.6.00.05.02 201-2115-109-103-20031105) with SMTP id <20031224064649.SUEE15399.priv-edtnes28.telusplanet.net@Endurance> for ; Tue, 23 Dec 2003 23:46:49 -0700 From: "Haywire" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: dual EWP plumbing? Date: Tue, 23 Dec 2003 22:46:39 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0054_01C3C9A6.A0C64B90" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0054_01C3C9A6.A0C64B90 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message Rusty (I miss Todd ) Gee Rusty, you've made me blush :-) I've been back for a few days, but needed a few days to sober up after all the post-exam celebration. I've been trying to keep up with all the recent postings, so I've read some of the discussion on your pump location. I installed mine after the rads and recommend it as well, due to one major factor that hasn't been mentioned. These pumps are plastic and while their max temp limits are above our operating range, prudence would dictate locating them on the cool side of things. Other factors that I considered as well were the pressure drop through the engine as you'd already mentioned. Another is that the pump must be located at the lowest point in the system. Due to my plumbing arrangement, which allows the shortest, straightest runs of 1 1/4" hose possible to minimize internal resistance, this also required placing it after the rads. As for your idea of one for each rad, I kinda like it. It would certainly simplify the issue of plumbing in parallel with minimum weight increase. I suspect that in your case, you will be doing minimum hi-altitude cruising, so for must of your playing.. err, flying you will be producing enough horsepower to require flow through both coolers, requiring the operation of both pumps. In any failure mode of a single pump, I'm certain that you will only require enough HP to maintain level flight, which a single rad should easily provide. I don't think it would be a good choice for my goals ( I have another idea cooking away), but it would certainly worth trying on yours. Go ahead, you know you want to...:-) Ps. Can you send a pic of the check valves that you plan to use. S. Todd Bartrim Turbo 13B RV-9Endurance C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm "Whatever you vividly imagine, Ardently desire, Sincerely believe in, Enthusiastically act upon, Must inevitably come to pass". ------=_NextPart_000_0054_01C3C9A6.A0C64B90 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
 
Rusty (I = miss Todd=20 = <g>)
 
Gee=20 Rusty, you've made me blush :-)
    I've been back for a few days, but needed a few = days to=20 sober up after all the post-exam celebration. I've been trying to keep = up with=20 all the recent postings, so I've read some of the discussion on your = pump=20 location.
    I installed mine after the rads and recommend = it as well,=20 due to one major factor that hasn't been mentioned. These pumps are = plastic and=20 while their max temp limits are above our operating range, prudence = would=20 dictate locating them on the cool side of things. Other factors that I=20 considered as well were the pressure drop through the engine as you'd = already=20 mentioned. Another is that the pump must be located at the lowest point = in the=20 system. Due to my plumbing arrangement, which allows the shortest, = straightest=20 runs of 1 1/4" hose possible to minimize internal resistance, this also = required=20 placing it after the rads.
    As for your idea of one for each rad, I kinda = like it. It=20 would certainly simplify the issue of plumbing in parallel with minimum = weight=20 increase. I suspect that in your case, you will be doing minimum = hi-altitude=20 cruising, so for must of your playing.. err, flying you will be = producing enough=20 horsepower to require flow through both coolers, requiring the operation = of both=20 pumps. In any failure mode of a single pump, I'm certain that you will = only=20 require enough HP to maintain level flight, which a single rad should = easily=20 provide.
    I don't think it would be a good choice for my = goals ( I=20 have another idea cooking away), but it would certainly worth trying on = yours.=20 Go ahead, you know you want to...:-)
 
Ps.=20 Can you send a pic of the check valves that you plan to = use.

S. Todd Bartrim
Turbo 13B = RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

=   =20 "Whatever you vividly imagine, Ardently desire, Sincerely believe in,=20 Enthusiastically act upon, Must inevitably come to pass".=20

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