X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nf-out-0910.google.com ([64.233.182.188] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3325470 for flyrotary@lancaironline.net; Mon, 01 Dec 2008 14:01:32 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.182.188; envelope-from=msteitle@gmail.com Received: by nf-out-0910.google.com with SMTP id b2so1307566nfb.27 for ; Mon, 01 Dec 2008 11:00:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:in-reply-to:mime-version:content-type:references; bh=5AeX3W535LcKcwBqOFO5JX1QtJLeKBw9HJxNUkiXoy0=; b=bShtemrVFNJuMIHHkmwzATJLywnrvc9qcE0SzTyMEqbSDqQmvpCV1fvI6+D7e5PkEE nLHzPjnDIzbr+vgUjFEHenjdBJkcA2xk1uy1rzqNbztbOAqMWY3SZpy8sdTfMxax0R3L +EXKsZNQa2fKmigElYERUSlMIuRNHh/natOlw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:references; b=dZUwWYi5lgYLXkTLMTqLXbnJncc4n7I1HUbf4QaH03RQ1AKOtAiUenBnsJT1o1U56t D6w0+LEoALIYvFc75PntJeuv72DC2CxNkaZhaqG6PjNVLt2erf5Qjr/oOxt0qZ3OM5rN YbbW3HK07YJECt3Z7TWahIknNiC/msWgbubxE= Received: by 10.210.120.7 with SMTP id s7mr12921105ebc.184.1228158056532; Mon, 01 Dec 2008 11:00:56 -0800 (PST) Received: by 10.210.24.6 with HTTP; Mon, 1 Dec 2008 11:00:56 -0800 (PST) Message-ID: <5cf132c0812011100v5f78149dk75458738ab687043@mail.gmail.com> Date: Mon, 1 Dec 2008 13:00:56 -0600 From: "Mark Steitle" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Front Nut, Thermostat and Coolant Intake hose was : [FlyRotary] Re: Hot first flight In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_112673_22690072.1228158056512" References: ------=_Part_112673_22690072.1228158056512 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Jeff, I have done as Bill describes, using an impact wrench. If you use the hand-hold method, use a glove. My only comment is that some alternators have right-hand thread, others have left-hand, depending on the direction they are designed to turn. So, look closely at the end of the shaft to mak= e sure you're turning it the correct direction. Mark S. On Mon, Dec 1, 2008 at 11:50 AM, Bill Bradburry w= rote: > Jeff, my alternator guy just holds the pulley with his left hand and > hits the nut with an impact wrench and it spins right off. It is right h= and > threads though=85.lefty tighty, righty loosey! > > If you discover that my alternator guy has a really strong left hand, you > can use Lynn's suggestion of a strap wrench.. :>) > > > > Bill B > > > ------------------------------ > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Jeff Whaley > *Sent:* Monday, December 01, 2008 12:14 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: Front Nut, Thermostat and Coolant Intake hose > was : [FlyRotary] Re: Hot first flight > > Hi Ed, I don't want to change the main e-shaft pulley =85 I was thinking = of > changing the ALTERNATOR double-groove pulley =85 the belt got jammed in t= he > alternator pulley; the alternator and top cowling were powdered with rubb= er > residue. > > Jeff > > > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Ed Anderson > *Sent:* Monday, December 01, 2008 11:58 AM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Front Nut, Thermostat and Coolant Intake hose was = : > [FlyRotary] Re: Hot first flight > > > > *FONT NUT CAUTION* > > > > Jeff, as Tracy mentioned =96 delay changing the main pulley until a bit l= ater > (unless its clear there is a defect in it) because if you DO let the thru= st > bearing slip off its shoulder on the E shaft =96 it's a minimum of taking= the > front cover off the engine (next to firewall) to get to it. In most case= s, > due to limited space under the cowl and motor mounts, you end up taking t= he > engine off the aircraft. That's not fun any time and I imagine even less= so > with temps in the 30F range. > > > > BUT, if you decide you HAVE to replace the main pulley without removing t= he > engine, here is a suggestion. > > > > Raise the tail of your aircraft as high in the air as you safely can. Th= is > will tend to keep the thrust bearing toward the rear of the engine (front= of > aircraft) where it rests against a spacer. That way the shock of an impa= ct > wrench will not have as much tendency to "walk" the bearing forward and o= ff > its shoulder. No guarantee it won't get out of position =96 just a bit l= ess > likely - than if the nose is up. > > > > There are some instructions in the Mazda manual or somewhere that tells y= ou > how to determine if the thrust bearing has falling out of position by tak= ing > some measurements based on how far you can get the pulley nut back on the > shaft =96 but, I can't recall at the moment where they and you really = don't > want to go there at this time in any case. > > > > THERMOSTAT > > > > I believe I read about the loss of efficiency by leaving out the plug in > one of Racing Beat's old technical catalogs and I am fairly certain they > mentioned 20%. Well, I looked in one of their old catalogs and while I d= id > not find a specific percentage mentioned (at least in my quick search), t= his > is a quote from them: > > Quote : > > " > > 7. Mazda's water thermostat is a "by-pass" type (*apparently > referring to the =BD" by-pass hole*). Therefore, if it is removed for > racing, the hole below it *MUST* be *plugged*=85=85 > > =85 NOTE: The thermostat should be removed and the *bypass plugged* for > racing. Do not use restrictors in the system. Free Flow is best. > > > > " > > RADIATOR INTAKE HOSE > > > > Another thing Racing Beat cautions about - is making certain that the > radiator hose on the suction side is the type that has a spring coiled in > side or is otherwise stiff enough to resist collapsing under the suction = of > the water pump. If that happens, of courses, your coolant flowed is > seriously impeded. > > > > The hose may be able to resist the suction at idle or low rpm, but may no= t > at the higher rpm. If you squeeze the hose and can deform it with your > hand pressure , then it is likely too flimsy to serve as the radiator hos= e > on the intake side of the pump. > > > > You are 99% there, Jeff. So no rash action, just take it one step at a > time {:>) =96 easy for me to say. > > Ed Anderson > > Rv-6A N494BW Rotary Powered > > Matthews, NC > > eanderson@carolina.rr.com > > http://www.andersonee.com > > http://members.cox.net/rogersda/rotary/configs.htm#N494BW > > http://www.dmack.net/mazda/index.html > ------=_Part_112673_22690072.1228158056512 Content-Type: text/html; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Jeff,
 
I have done as Bill describes, using an impact wrench.  If you us= e the hand-hold method, use a glove.  My only comment is that some alt= ernators have right-hand thread, others have left-hand, depending on the di= rection they are designed to turn.  So, look closely at the end of the= shaft to make sure you're turning it the correct direction. 
 
Mark S.

On Mon, Dec 1, 2008 at 11:50 AM, Bill Bradburry = <bbradburr= y@bellsouth.net> wrote:

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.n= et] On Behalf Of Jeff W= haley
Sent: Monday, December 01, = 2008 12:14 PM
To: Rotary= motors in aircraft
Subject:= [FlyRotary] Re: Front Nut, Thermostat and Coolant Intake hose was : [F= lyRotary] Re: Hot first flight

Hi Ed, I don't want to ch= ange the main e-shaft pulley =85 I was thinking of changing the ALTERNATOR = double-groove pulley =85 the belt got jammed in the alternator pulley; the = alternator and top cowling were powdered with rubber residue.=

Jeff

 

From: Rota= ry motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson
Sent: Monday, December 01, = 2008 11:58 AM
To: Rotary= motors in aircraft
Subject:= [FlyRotary] Front Nut, Thermostat and Coolant Intake hose was : [FlyRo= tary] Re: Hot first flight

FONT NUT CAUT= ION

 

Jeff, as Tracy mentioned =96 delay = changing the main pulley until a bit later (unless its clear there is a def= ect in it) because if you DO let the thrust bearing slip off its shoulder o= n the E shaft =96 it's a minimum of taking the front cover off the engine (= next to firewall) to get to it.  In most cases, due to limited space u= nder the cowl and motor mounts, you end up taking the engine off the aircra= ft.  That's not fun any time and I imagine even less so with temps in = the 30F range.

 

BUT, if you decide you HAVE to repl= ace the main pulley without removing the engine, here is a suggestion.

 

Raise the tail of your aircraft as = high in the air as you safely can.  This will tend to keep the thrust = bearing toward the rear of the engine (front of aircraft) where it rests ag= ainst a spacer.  That way the shock of an impact wrench will not have = as much tendency to "walk" the bearing forward and off its shoulder.  = No guarantee it won't get out of position =96 just a bit less likely - than= if the nose is up.

 

There are some instructions in the = Mazda manual or somewhere that tells you how to determine if the thrust bea= ring has falling out of position by taking some measurements based on how f= ar you can get the pulley nut back on the shaft  =96 but, I can't &nbs= p;recall  at the moment where they and you really don't want to go the= re at this time in any case.

 

THERMOSTAT

 

I believe I read about the loss of = efficiency by leaving out the plug in one of Racing Beat's old technical ca= talogs and I am fairly certain they mentioned 20%.  Well, I looked in = one of their old catalogs and while I did not find a specific percentage me= ntioned (at least in my quick search), this is a quote from them:

Quote :

"

7.     &nb= sp; Mazda's water thermostat is a "by-pass" type (apparently referring to the =BD" by-pass  hole).  Therefore, if it= is removed for racing, the hole below it MUST be plugged<= /b>=85=85

=85 NOT= E:  The thermostat should be removed and the bypass plugged for racing.  Do not use restrict= ors in the system.  Free Flow is best.

 <= /span>

"

RADIATOR INTAKE HOSE

 

Another thing Racing Beat cautions = about - is making certain that the radiator hose on the suction side is the= type that has a spring coiled in side or is otherwise stiff enough to resi= st collapsing under the suction of the water pump.  If that happens, o= f courses, your coolant flowed is seriously impeded.

 

The hose may be able to resist the = suction at idle or low rpm, but may not at the higher rpm.  If you squ= eeze the hose and can  deform it with your hand pressure , then it is = likely too flimsy to serve as the radiator hose on the intake side of the p= ump.

 

You are 99% there, Jeff.  So n= o rash action, just take it one step at a time {:>) =96 easy for me to s= ay.


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