X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from EXHUB003-4.exch003intermedia.net ([207.5.74.111] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTPS id 3325392 for flyrotary@lancaironline.net; Mon, 01 Dec 2008 12:58:14 -0500 Received-SPF: none receiver=logan.com; client-ip=207.5.74.111; envelope-from=jwhaley@datacast.com Received: from EXVMBX003-5.exch003intermedia.net ([207.5.74.45]) by EXHUB003-4.exch003intermedia.net ([207.5.74.111]) with mapi; Mon, 1 Dec 2008 09:57:39 -0800 From: Jeff Whaley To: Rotary motors in aircraft Date: Mon, 1 Dec 2008 09:57:37 -0800 Subject: RE: [FlyRotary] Re: Front Nut, Thermostat and Coolant Intake hose was : [FlyRotary] Re: Hot first flight Thread-Topic: [FlyRotary] Re: Front Nut, Thermostat and Coolant Intake hose was : [FlyRotary] Re: Hot first flight Thread-Index: AclT3aeE8z4KMp7LTkempiNIDu0wSwAAFSQw Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_C03ABB0A7362B84BB53D544B3C305E0ED132CD4CDCEXVMBX0035exc_" MIME-Version: 1.0 --_000_C03ABB0A7362B84BB53D544B3C305E0ED132CD4CDCEXVMBX0035exc_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bill, I think that should be Righty-Tighty and Lefty-Loosey for right hand = thread ... Jeff From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Bill Bradburry Sent: Monday, December 01, 2008 12:51 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Front Nut, Thermostat and Coolant Intake hose was = : [FlyRotary] Re: Hot first flight Jeff, my alternator guy just holds the pulley with his left hand and hits t= he nut with an impact wrench and it spins right off. It is right hand thre= ads though....lefty tighty, righty loosey! If you discover that my alternator guy has a really strong left hand, you c= an use Lynn's suggestion of a strap wrench.. :>) Bill B ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf 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 ... I was thinking of= changing the ALTERNATOR double-groove pulley ... the belt got jammed in th= e alternator pulley; the alternator and top cowling were powdered with rubb= er residue. Jeff From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf 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 : [F= lyRotary] Re: Hot first flight FONT NUT CAUTION Jeff, as Tracy mentioned - delay changing the main pulley until a bit later= (unless its clear there is a defect in it) because if you DO let the thrus= t bearing slip off its shoulder on the E shaft - it's a minimum of taking t= he front cover off the engine (next to firewall) to get to it. In most cas= es, due to limited space under the cowl and motor mounts, you end up taking= the engine off the aircraft. That's not fun any time and I imagine even l= ess so with temps in the 30F range. BUT, if you decide you HAVE to replace 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 against a spacer. That way the shock of an imp= act 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 - 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 bearing has falling out of position by taki= ng some measurements based on how far you can get the pulley nut back on th= e shaft - but, I can't recall at the moment where they and you really do= n'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 on= e of Racing Beat's old technical catalogs and I am fairly certain they ment= ioned 20%. Well, I looked in one of their old catalogs and while I did not= find a specific percentage mentioned (at least in my quick search), this i= s a quote from them: Quote : " 7. Mazda's water thermostat is a "by-pass" type (apparently referring t= o the =BD" by-pass hole). Therefore, if it is removed for racing, the hol= e below it MUST be plugged...... ... NOTE: The thermostat should be removed and the bypass plugged for raci= ng. 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 radia= tor hose on the suction side is the type that has a spring coiled in side o= r is otherwise stiff enough to resist collapsing under the suction of the w= ater pump. If that happens, of courses, your coolant flowed is seriously i= mpeded. The hose may be able to resist the suction at idle or low rpm, but may not = at the higher rpm. If you squeeze the hose and can deform it with your ha= nd pressure , then it is likely too flimsy to serve as the radiator hose on= the intake side of the pump. You are 99% there, Jeff. So no rash action, just take it one step at a tim= e {:>) - 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 --_000_C03ABB0A7362B84BB53D544B3C305E0ED132CD4CDCEXVMBX0035exc_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Bill, I think that should be Righty-Tighty and Lefty-Loosey = for right hand thread …

Jeff

 

From: Rotary motors= in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bill Bradburry
Sent: Monday, December 01, 2008 12:51 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Front Nut, Thermostat and Coolant Intake ho= se was : [FlyRotary] Re: Hot first flight

 

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.  I= t is right hand threads though….lefty tighty, righty loosey!

If you discover that my alternator guy has a really st= rong left hand, you can use Lynn’s suggestion of a strap wrench..  :&= gt;)

 

Bill B 

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On 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 ho= se was : [FlyRotary] Re: Hot first flight

Hi Ed, I don’t want to change the main e-shaft pulley = … I was thinking of changing the ALTERNATOR double-groove pulley … the belt g= ot jammed in the alternator pulley; the alternator and top cowling were powdered with rubber residue.

Jeff

 

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

 

FONT NUT CAUTION

 

Jeff, as Tracy mentioned – delay changing the main pulley= until a bit later (unless its clear there is a defect in it) because if you DO let = the thrust bearing slip off its shoulder on the E shaft – it’s a mi= nimum of taking the front cover off the engine (next to firewall) to get to it.  In mo= st cases, due to limited space under the cowl and motor mounts, you end up tak= ing the engine off the aircraft.  That’s not fun any time and I imag= ine even less so with temps in the 30F range.

 

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

 

Raise the tail of your aircraft as high in the air as you safel= y can.  This 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 impact wrench will not have as much tendency to “walkR= 21; the bearing forward and off its shoulder.  No guarantee it won’t get out of = position – just a bit less likely - than if the nose is up.

 

There are some instructions in the Mazda manual or somewhere th= at tells you how to determine if the thrust bearing has falling out of positio= n by taking some measurements based on how far you can get the pulley nut back o= n the shaft  – 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 th= e plug in one of Racing Beat’s old technical catalogs and I am fairly c= ertain they mentioned 20%.  Well, I looked in one of their old catalogs and w= hile I did not find a specific percentage mentioned (at least in my quick search= ), this is a quote from them:

Quote :

“

7.&n= bsp;    Mazda’s water thermostat is a “by-pass” type = (apparently refe= rring to the =BD” by-pass  hole).  Therefore, if it is removed for racing, the hole below it MUST be plugged…&= #8230;

… NOTE:  The thermo= stat should be removed and the bypass plugged for racing.  Do not us= e restrictors in the system.  Free Flow is best.

 

“

RADIATOR INTAKE HOSE

 

Another thing Racing Beat cautions about - is making certain th= at 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 serio= usly impeded.

 

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

 

You are 99% there, Jeff.  So no rash action, just take it = one step at a time {:>) – easy for me to say.

Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson@carolina.rr.com

http://www.andersonee.c= om

http://members.cox.net/rogersda/rotary/configs.htm#N494BW<= /o:p>

http://www.d= mack.net/mazda/index.html

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