Return-Path: Received: from mail.tsisp.com ([65.23.108.44] verified) by logan.com (CommuniGate Pro SMTP 4.2.1) with ESMTP-TLS id 400232 for flyrotary@lancaironline.net; Tue, 07 Sep 2004 07:35:12 -0400 Received-SPF: none receiver=logan.com; client-ip=65.23.108.44; envelope-from=steve@tsisp.com Received: from stevehome by mail.tsisp.com (Technical Support Inc.) with SMTP id CQA74584 for ; Tue, 07 Sep 2004 07:34:36 -0400 Reply-To: From: "Steve Brooks" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Water pump problem Date: Tue, 7 Sep 2004 07:36:45 -0400 Message-ID: <005b01c494ce$f4dbdd00$6400a8c0@WORKGROUP.local> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005C_01C494AD.6DCBC3A0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) 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_005C_01C494AD.6DCBC3A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Bill, Thanks for the explanation. That makes allot of sense. Looks like I’ll have to pull the cores, and drill through the blocking plate. That would have been a much easier job before the AN-16 bungs were welded on, but I can still get a ¾” hole saw through the opening, so it should be possible. Regards, Steve -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of William Sent: Monday, September 06, 2004 10:50 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Water pump problem Bear in mind that the cores were designed for coolant evaporation, not for water flow heat transfer. It sounds like they had a design that put the liquid coolant in the bottom of the evaporator, and then relied on percolation, i.e. letting the fluid boil in the core, with the bubbles forcing the liquid around and up the core to the exit. Evaporators (2-phase heat transfer) are more efficient in a 'flooded' mode, so by having the plate in the header tank, the liquid could flow into the bottom of the core, absorb heat, a bubble form and be forced along one of the tubes until it reaches a riser in the header tank, then out through the top 2". This would work great for a air-conditioning core, but not for our use. My cores were mounted (in the car) with one header tank down where the liquid was fed, and the other header tank up where the vapor was withdrawn. If his were mounted with both tubes up (in the car), then the explanation above makes sense. In any case, you need a direct shot from top to bottom in both header tanks in our use as water coolers. Bill Schertz KIS Cruiser # 4045 ----- Original Message ----- From: Russell Duffy To: Rotary motors in aircraft Sent: Monday, September 06, 2004 8:35 PM Subject: [FlyRotary] Re: Water pump problem No. It had one tube in each of the tanks. Both in the top. One tank is blocked off by a plate about 2" down from the top. The other tank originally had a tube in it internally that extended to within an inch or so of the bottom. Does that make sense ? I must be misunderstanding something, because I don't see how the original configuration could have been using the whole core in the car. Let's forget that for now though. You should now have a tube in each tank. Both tanks should be open from top to bottom, meaning that you'd have to have drilled a hole through the blocking plate that was installed in the tank. If you didn't open up the blocking plate, you're only using the top two inches of the core, which would explain why that's all that's getting hot. To rephrase this another way, one tube should come into the top of one tank. The liquid running into the tank should be able to go through every one of the flat tubes that join the tank. The liquid should be able to come out every one of those flat tubes in the other tank, and go up and out through the outlet tube. Is that what you have now? If the above wasn't clear, I'm afraid we're going to have to resort to drawings :-) Cheers, Rusty (glad the South FL boys survived) ------=_NextPart_000_005C_01C494AD.6DCBC3A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message

Bi= ll,

Th= anks for the explanation.  That = makes allot of sense.  Looks like = I’ll have to pull the cores, and drill through the blocking plate.  That would have been a much easier job before the = AN-16 bungs were welded on, but I can still get a =BE” hole saw through = the opening, so it should be possible.

 

Re= gards,

St= eve

 

-----Original Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of William
Sent: Monday, September = 06, 2004 10:50 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = Water pump problem

 

Bear in mind that the cores were designed for coolant evaporation, not for water = flow heat transfer. It sounds like they had a design that put the liquid = coolant in the bottom of the evaporator, and then relied on percolation, i.e. = letting the fluid boil in the core,  with the bubbles forcing the liquid around = and up the core to the exit.

 <= /p>

Evaporators (2-phase heat transfer) are more efficient in a 'flooded' mode, so by = having the plate in the header tank, the liquid could flow into the bottom of = the core, absorb heat, a bubble form and be forced along one of the tubes = until it reaches a riser in the header tank, then out through the top 2". = This would work great for a air-conditioning core, but not for our use. = <= /p>

 <= /p>

My cores were mounted (in the car) with one header tank down where the = liquid was fed, and the other header tank up where the vapor was withdrawn. If his = were mounted with both tubes up (in the car), then the explanation above = makes sense.

 <= /p>

In any case, you need a direct shot from top to bottom in both header tanks in = our use as water coolers.

Bill Schertz
KIS Cruiser # 4045

----- Original Message -----

=

To: Rotary motors in aircraft

Sent: Monday, = September 06, 2004 8:35 PM

Subject: [FlyRotary] Re: Water pump problem

 <= /p>

No.  = It had one tube in each of the tanks.  Both in the top.   = One tank is blocked off by a plate about 2" down from the top.  The other tank originally had = a tube in it internally that extended to within an inch or so of the = bottom.

 

Does that make sense = ?

 

 <= /p>

I must be misunderstanding something, because I don't see how the original = configuration could have been using the whole core in the car.  Let's forget that = for now though.  <= /p>

 <= /p>

You = should now have a tube in each tank.  Both tanks should be open from top = to bottom, meaning that you'd have to have drilled a hole through the = blocking plate that was installed in the tank.  If you didn't open up = the blocking plate, you're only using the top two inches of the core, which = would explain why that's all that's getting = hot.  <= /p>

 <= /p>

To rephrase this another way, one tube should come into the top of one tank.  The liquid running into the tank should be able to go = through every one of the flat tubes that join the tank.  The liquid should be = able to come out every one of those flat tubes in the other tank, and go = up and out through the outlet tube.  Is that what you have = now?  <= /p>

 <= /p>

If the = above wasn't clear, I'm afraid we're going to have to resort = to drawings :-)

 <= /p>

Cheers,<= /p>

Rusty = (glad the South FL boys survived)    = <= /p>

 <= /p>

 <= /p>

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