X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-qy0-f182.google.com ([209.85.221.182] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3816742 for flyrotary@lancaironline.net; Tue, 18 Aug 2009 09:00:33 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.221.182; envelope-from=rwstracy@gmail.com Received: by qyk12 with SMTP id 12so2623512qyk.7 for ; Tue, 18 Aug 2009 05:59:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to :content-type; bh=yDmqQJpGi6hpXeMRkre3z3GjSTc4Sn6PdvlQOLpbaZ4=; b=gN/c4YQBIBkffskYgmKsG/tSyqP+PieTS53GEC5KG/y6SpN5NHacgqeonDUy+T7Qx1 QU1oMFRo5zwBaJJhSibhLBnKvj18Ge6v+YVhxRUyIMUS+oJ0eEB8zmxOrkkX+KtkmkqO w8Z55L5yhDvnM7ByInatPLUWya9LTwKlXBczc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=edXgZTmCS10IrMXyOZq9McrreyUjPTRFzVoMN4e5KbbXGOhVADMcv0GVIwkJGCmBBy oS4R9p6LlbLf/5K5CaTBQC31A32tA9ZhRnfNDlTxhMFAt2euLIc98v7G27z6ApIJubl2 esNiY3PcpGDQd9LcoMzrb5FjZZEdWOxDld35Y= MIME-Version: 1.0 Sender: rwstracy@gmail.com Received: by 10.224.23.131 with SMTP id r3mr5302639qab.273.1250600397328; Tue, 18 Aug 2009 05:59:57 -0700 (PDT) In-Reply-To: References: Date: Tue, 18 Aug 2009 08:59:54 -0400 X-Google-Sender-Auth: 86cf30b6f7c8b449 Message-ID: <1b4b137c0908180559meccfc6fj14dcda7148b48a1@mail.gmail.com> Subject: Re: [FlyRotary] Re: Swirl pots From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0014850438aa71e0fb04716a1887 --0014850438aa71e0fb04716a1887 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Another Myth. Back pressure on a centrifugal pump REDUCES the amount of power absorbed by the pump. An empirical test to prove it to yourself. Turn on your shop-vac (a centrifugal pump). Restrict the airflow by blocking either the output or the input. Hear the RPM increase? That's because the load went DOWN, not UP. Tracy (sacred cow slaughtering mode) On Mon, Aug 17, 2009 at 10:17 PM, Bill Bradburry wrote: > Lynn, > > What is the purpose of the restrictor in the line from the water pump? Is > the air supposed to come out of solution when the pressure drops on the back > side? Looks like you would be adding an unnecessary load on the engine to > add the pressure in the system??? > > > > Bill B > > > ------------------------------ > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *On > Behalf Of *Lynn Hanover > *Sent:* Monday, August 17, 2009 9:50 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Swirl pots > > I need to design a swirl pot for my renesis/rv6a installation. is there an > accepted volume I need to work with? it's my understanding that the water > pump outlet goes thru the swirl pot and then on to the radiator input, and > that the pot should be close to the pump. would it make sense to look into > the pot welded to the pump, if possible? are pots always cylindrical? > kevin > > > > > > Here is the system I have used on my race cars since 1975. I then found it > on Mazda RX-2s and 3s. > > > > My make up tank is actually off of an RX-2. > > > > The swirl pot is a replica of a device used in commercial heating systems > using hot water to heat big buildings, called a Rolairtrol by Bell and > Gossett. Used to remove air from the hot water circuits. > > > > Mine are made from expended propane bottles. Smal aluminum fire > extinguishers work as well. > > > > It is very difficult to remove the air from the rotary engine, and I have > the engines out of the car every two or three weekends, so it turned into a > giant pain with each refilling of the coolant system. The inlet flow is in > the center and on a tangent so as to spin the coolant. Any air pops to the > top of the can and as pressure goes up with temperature the air is forced > into the bottom of the make up tank. When coolant temps drop a bit the > pressure in the make up tank can force only coolant back into the system, no > air. After only one heat cycle you will need to add coolant to the make up > tank. The overflow tank is required for racing, but never gets any coolant > in it. > > > > This is not my idea. (The make up tank) It was on every Mazda imported to > the US. > > > > The cap on the swirl pot is a seal only used to fill the system. The > pressure requlating cap is on the top of the make up tank. The swirl pot > could have only a fitting for the line to the make up tank. > > The system can be filled by removing one hose from the pot. > > > > The make up pot need not be higher than anything else. Mine is on the > passenger side floor. Use small diameter hose in the run to the make up > tank. Light, cheap, works every time. > > > > Lynn E. Hanover > --0014850438aa71e0fb04716a1887 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Another Myth.=A0 Back pressure on a centrifugal pump REDUCES the amount of = power absorbed by the pump.=A0

An empirical test to prove it to you= rself.=A0 Turn on your shop-vac (a centrifugal pump).=A0=A0 Restrict the ai= rflow by blocking either the output or the input.=A0 Hear the RPM increase?= =A0 That's because the load went DOWN, not UP.

Tracy=A0 (sacred cow slaughtering mode)

On Mon, Aug 17, 2009 at 10:17 PM, Bill Bradburry <<= a href=3D"mailto:bbradburry@bellsouth.net">bbradburry@bellsouth.net>= wrote:

Lynn,

What is the purpose of the restrictor in the line from the water pump?=A0 Is the air supposed to come out of solution when the pressure drop= s on the back side?=A0 Looks like you would be adding an unnecessary load on the engine to add the pressure=A0 in the system???

=A0

Bill B

=A0

From: Rotary motors in aircraft [mailto:fl= yrotary@lancaironline.net] On Behalf Of Lynn Hanover
Sent: Monday, August 17, 2= 009 9:50 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Swirl= pots

I need to design a swirl pot for m= y renesis/rv6a installation.=A0 is there an accepted volume I need to work with?=A0 it's my understanding that the water pump outlet goes thru the swirl pot and then on to the radiator input, and that the pot should be clo= se to the pump.=A0 would it make sense to look into the pot welded to the pump= , if possible?=A0 are pots always cylindrical?=A0=A0=A0 kevin

=A0

=A0

Here is the system I have used on = my race cars since 1975. I then found it on Mazda RX-2s and 3s.

=A0

My make up tank is actually off of= an RX-2.

=A0

The swirl pot is a replica of a de= vice used in commercial heating systems using hot water to heat big buildings, called= a Rolairtrol by Bell and Gossett. Used to remove air from the hot water circuits.<= /p>

=A0

Mine are made from expended propan= e bottles. Smal aluminum fire extinguishers work as well.

=A0

It is very difficult to remove the= air from the rotary engine, and I have the engines out of the car every two or three weekends, so it turned into a giant pain with each refilling of the coolant system.=A0 The inlet flow is in the center and on a tangent so as to spin the coolant. Any air pops to the top of the can and as pressure goes up wit= h temperature the air is forced into the bottom of the make up tank. When coo= lant temps drop a bit the pressure in the make up tank can force only coolant ba= ck into the system, no air. After only one heat cycle you will need to add coo= lant to the make up tank. The overflow tank is required for racing, but never=A0gets any coolant in it.=A0=A0

=A0

This is not my idea. (The make up = tank) It was on every Mazda imported to the US.

=A0

The cap on the swirl pot is a seal= only used to fill the system. The pressure requlating cap is on the top of the m= ake up tank. The swirl pot could have only a fitting for the line to the make u= p tank.

The system can be filled by removi= ng one hose from the pot.=A0

=A0

The make up pot need not be higher= than anything else. Mine is on the passenger side floor. Use small diameter hose= in the run to the make up tank. Light, cheap, works every time.<= /p>

=A0

Lynn E. Hanover=A0


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