X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wproxy.gmail.com ([64.233.184.200] verified) by logan.com (CommuniGate Pro SMTP 5.0.7) with ESMTP id 965112 for flyrotary@lancaironline.net; Thu, 02 Feb 2006 14:44:55 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.200; envelope-from=wdleonard@gmail.com Received: by wproxy.gmail.com with SMTP id i30so452477wra for ; Thu, 02 Feb 2006 11:44:11 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=V8ZZWyXJ8QbDnP0FTxr5sKsKSQi2JAWN28MXmeS6jABbKbYiX7nGnT11SWyZLnIbjZjrSKdf5NFaokMpn+iKCFrHeghRViserlhGSU1W7MzJdZKO6ew9rB0qm/6pX+GdpYe3BVlZozmRJDufTddvU+nSoOkfrDfZhky1/vryOW8= Received: by 10.65.230.17 with SMTP id h17mr718411qbr; Thu, 02 Feb 2006 11:44:10 -0800 (PST) Received: by 10.64.151.2 with HTTP; Thu, 2 Feb 2006 11:44:10 -0800 (PST) Message-ID: <1c23473f0602021144l4a0833b3ke4147feb0c10b7c1@mail.gmail.com> Date: Thu, 2 Feb 2006 11:44:10 -0800 From: David Leonard To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Suitability of NPG for Rotary Engine use In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_4096_3805670.1138909450626" References: ------=_Part_4096_3805670.1138909450626 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On 2/1/06, Ed Anderson wrote: > > You are right, Jesse - no conflict here. If both a reciprocating engine > ( which is normally a iron block(or steel sleeve inserts) with an aluminu= m > piston) and a rotary loose coolant, my bet is the iron block will at some > point seize from overheating. Because the aluminum piston will expand > faster than the iron/steel due to the heat. Just the opposite with a rot= ary > (as at least two/three folks have proven), the aluminum housing expands (= and > some compression/power is lost) faster than the iron rotor - so no seizin= g > even though the engine is cooked. > > Never said you wouldn't damage a rotary with a loss of coolant, just that > it would keep running as long as then engine had fire and fuel. Landing > with a damaged engine with some power available beats dead sticking in a > seized engine in my opinion. > > Ed > In my limited experience of overheating rotary engines and then dead sticking onto freeways, you can expect about 4 minutes from inital overheat to complete loss of engine power. The engine will not seize, but the complete loss of compression will prevent any power production. I invite other to verify my data :-) -- Dave Leonard Turbo Rotary RV-6 N4VY http://members.aol.com/_ht_a/rotaryroster/index.html http://members.aol.com/_ht_a/vp4skydoc/index.html ------=_Part_4096_3805670.1138909450626 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline

On 2/1/06, E= d Anderson <eanderson@c= arolina.rr.com> wrote:
You are right, Jesse - no conflict here.  If= both a reciprocating engine ( which is normally a iron block(or steel= sleeve inserts) with an aluminum piston) and a rotary loose coolant, my be= t is the iron block will at some point seize from overheating.  Becaus= e the aluminum piston will expand faster than the iron/steel due to the hea= t.  Just the opposite with a rotary (as at least two/three folks have = proven), the aluminum housing expands (and some compression/power is lost) = faster than the iron rotor - so no seizing even though the engine is cooked= .  =20
 
Never said you wouldn't damage a rotary with a lo= ss of coolant, just that it would keep running as long as then engine had&n= bsp;fire and fuel.  Landing with a damaged engine with some power avai= lable beats dead sticking in a seized engine in my opinion.
 
Ed
 
In my limited experience of overheating rotary engines and then d= ead sticking onto freeways, you can expect about 4 minutes from inital= overheat to complete loss of engine power.  The engine will not seize= , but the complete loss of compression will prevent any power production.
 
I invite other to verify my data  :-)
 
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