X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from zproxy.gmail.com ([64.233.162.197] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 989940 for flyrotary@lancaironline.net; Thu, 09 Jun 2005 11:43:29 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.233.162.197; envelope-from=wdleonard@gmail.com Received: by zproxy.gmail.com with SMTP id 34so114963nzf for ; Thu, 09 Jun 2005 08:42:43 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:references; b=N51JM//T2Bq/IYriR7pNXOKO/qbE+RyjLQXHAWu0h900J3+7IgEKotLy7FVTEtshmv8gKBAiNg6mDy/6QMw8fpb8L1LtAJhUy0IsEe0q2LVBJViq8YyeWSgvVqXL36T10Hh5S8b/e9P052rddHwtNrr1DvIWL0/AF6nVLZJdzDg= Received: by 10.36.222.42 with SMTP id u42mr516268nzg; Thu, 09 Jun 2005 08:42:43 -0700 (PDT) Received: by 10.36.9.4 with HTTP; Thu, 9 Jun 2005 08:42:43 -0700 (PDT) Message-ID: <1c23473f0506090842367b83a7@mail.gmail.com> Date: Thu, 9 Jun 2005 08:42:43 -0700 From: David Leonard Reply-To: David Leonard To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: coolant leak In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_2312_26133896.1118331763559" References: ------=_Part_2312_26133896.1118331763559 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On 6/9/05, al p wick wrote:=20 >=20 > Was said: > Let's explore this. Let's convert this theory to facts. > Just use your favorite drink container. No, not a beer can. > 1) You can use any container that has a small neck. Fill container with= =20 > water, place a balloon over the bottle neck.=20 > 2) Put a pan of water on the stove, turn to high heat, place your drink= =20 > container inside. > 3) As it heats up, you will see the balloon expand. When it cools down,= =20 > you should see balloon suck into bottle. > Heated coolant has excited molecules that get further apart from each=20 > other. As it cools, these molecules get closer together. It's a tremendou= s=20 > force. > I did all sorts of little experiments like that with my plane. Like I=20 > covered one exhaust pipe with rubber and watched how it behaved. I instal= led=20 > an atmospheric pressure sensor inside exhaust and watched the pressure=20 > pulses. There are a lot of physics principals that we don't have a good g= rip=20 > on because they are difficult to measure. I work in science museum where = we=20 > expose people to these every day. It's a blast. > =20 > -al wick > Artificial intelligence in cockpit, Cozy IV powered by stock Subaru 2.5 > N9032U 200+ hours on engine/airframe from Portland, Oregon > Prop construct, Subaru install, Risk assessment, Glass panel design info: > http://www.maddyhome.com/canardpages/pages/alwick/index.html > =20 Al, although I find your tone a little condescending, I am sure that you= =20 don't mean it. To use your example try the following experiment. Use the same bottle with= =20 the balloon over the top. But first put a little 50/50 coolant in the=20 bottle. Heat the bottle, but you must boil a little of the coolant. Now coo= l=20 the bottle. The balloon will never go all the way down. Not all of the vapo= r=20 will go back into liquid form, there is a vapor pressure below which it wil= l=20 not drop. --=20 Dave Leonard Turbo Rotary RV-6 N4VY http://members.aol.com/_ht_a/rotaryroster/index.html http://members.aol.com/vp4skydoc/index.html ------=_Part_2312_26133896.1118331763559 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
On 6/9/05, a= l p wick <alwick@juno.com>= wrote:
Was said: <Why does it develop a vacuum on cool down?>
 
 
Let's explore this. Let's convert this theory to facts.
Just use your favorite drink container. No, not a beer can.
 
1) You can use any container that has a small neck. Fill container wit= h water, place a balloon over the bottle neck.
2) Put a pan of water on the stove, turn to high heat, place your drin= k container inside.
3) As it heats up, you will see the balloon expand. When it cools down= , you should see balloon suck into bottle.
 
Heated coolant has excited molecules that get further apart from each = other. As it cools, these molecules get closer together. It's a tremendous = force.
 
I did all sorts of little experiments like that with my plane. Like I = covered one exhaust pipe with rubber and watched how it behaved. I installe= d an atmospheric pressure sensor inside exhaust and watched the pressure pu= lses. There are a lot of physics principals that we don't have a good = grip on because they are difficult to measure. I work in science museum whe= re we expose people to these every day. It's a blast.
 

-al wick
Artificial intelligence in cockpit, Cozy IV powered by= stock Subaru 2.5
N9032U 200+ hours on engine/airframe from Portland, Or= egon
Prop construct, Subaru install, Risk assessment, Glass panel design= info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html
 = ;
 
 
 
Al, although I find your tone a little condescending, I am sure that y= ou don't mean it.
 
To use your example try the following experiment.  Use the same b= ottle with the balloon over the top.  But first put a little 50/50 coo= lant in the bottle.  Heat the bottle, but you must boil a little of th= e coolant.  Now cool the bottle.  The balloon will never go all t= he way down.  Not all of the vapor will go back into liquid form, ther= e is a vapor pressure below which it will not drop.

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