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Bypassing the muffler heat cuff?

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FlyboyTR

Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama

Posted: Mon Mar 24, 2008 5:57 pm Post subject: Bypassing the muffler heat cuff?

I am not sure exactly where I should post this question…?  I have a Continental IO-240 in my Experimental Vixen.  I have the stainless steel heat cuff on the muffler to provide cabin heat.  I want to disconnect the Scat tubing (inlet and outlet) and bypass the heat cuff completely.  I will reroute and connect the Scat tubing.  This will allow non heated air to flow through the heat/vent system to provide more cooling in the cockpit.



Will having the tubing disconnected create any strange heat issues?  I really don’t think that it would…but would appreciate some feedback regarding this.  Thanks!



Travis

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_________________
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)

GLJSOJ1

Joined: 18 Aug 2007
Posts: 82
Location: Chesapeake, Virginia

Posted: Mon Mar 24, 2008 6:25 pm Post subject: Bypassing the muffler heat cuff?

Hi Travis

  

 I'm no expert but what I did on my o-200 is use a air valve to let either heated air or outside air into the cabin.  I bought it through Aircraft Spruce.  I have a cool air tube as well as a warm air tube that stays attached to the heat muff.  My flapper valve will still allow some air to flow through the heat muff and the vent overboard so that there is still air moving through the system to cool it somewhat.  Biggest issue I see is the possible overheating of the exaust and heat muff as usually when these are in the off position, then air is dumped overboard.  Just my thoughts as mine is not flying yet.  



Glenn 

 

601XL almost done   N676L Reserved

Chesapeake  

VA  



 	  Quote: 	
		   Subject: Bypassing the muffler heat cuff?

 From: flyboytr(at)bellsouth.net

 Date: Mon, 24 Mar 2008 18:57:46 -0700

 To: continental-list(at)matronics.com

 

 --> Continental-List message posted by: "FlyboyTR" <flyboytr(at)bellsouth.net>

 

 I am not sure exactly where I should post this question…? I have a Continental IO-240 in my Experimental Vixen. I have the stainless steel heat cuff on the muffler to provide cabin heat. I want to disconnect the Scat tubing (inlet and outlet) and bypass the heat cuff completely. I will reroute and connect the Scat tubing. This will allow non heated air to flow through the heat/vent system to provide more cooling in the cockpit.

 

 Will having the tubing disconnected create any strange heat issues? I really don’t think that it would…but would appreciate some feedback regarding this. Thanks!

 

 Travis 

 

 

 --------

 Travis Rayner

 Mobile, AL

 Skystar Vixen, N-789DF

 Continental IO-240, Prince P-Tip Prop

 IFR with Autopilot

 AnyWhereMap Navigation with weather

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=172411#172411

 

 

 

 

 

 

 

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_________________
601XL N676L FLYING PHASE I
CHESAPEAKE VA

FlyboyTR

Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama

Posted: Tue Mar 25, 2008 5:18 am Post subject: Re: Bypassing the muffler heat cuff?

Glenn, 

Thanks for the reply.  I had considered doing that.  I have the heater control valve that either allows the heated air into the cockpit or dumps it overboard.  I would have to have a second system and a second control valve to manage the cool air.  I was trying to just completely disconnect the heat for the warmer months.  I would reconnect late in the fall.  It is the muffler/cuff overheating that I am worried about...since the air flow in/out of the cuff does remove a measure of heat.  Thanks...and I appreciate your suggestion!



Travis

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_________________
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)

RBartholomeee(at)comcast.
Guest

Posted: Tue Mar 25, 2008 7:25 pm Post subject: Bypassing the muffler heat cuff?

I have a 1965  Cessna 150E with a stock O200.  Then scat hose from the hot end of the muff  goes to a valve assemby on the firewall.  When the heat is off, the hot air  is allow to dump on the engine side of the firewall. When the heat is on it  closes off the dump path and opens the access to the cabin through the  firewall.

  

          �             Roger (at) MD43

 --

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FlyboyTR

Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama

Posted: Thu Mar 27, 2008 11:14 am Post subject: Re: Bypassing the muffler heat cuff?

Let me see if I can clarify this... I have a fully functioning heating system with air control valve......etc,,,,,etc..... I do NOT have a secondary cool air inlet (only the one going to the heater cuff.  Yes, I can start fabricating and cutting holes, installing new fresh air hoses, change the existing heater control valve so that it will accommodate both a hot and cold inlet, etc.  Problem is.......I don't won't to do all that.  I just want to completely bypass the heater cuff so that the air will flow directly to the control valve without being heated.  This will help to add more cool air in the cockpit.  the question is........ will this cause an overheating issue with the muffler/cuff (since it no longer will have cool air being ducted to it)?



I appreciate the suggestions...and I may have to do major plumbing work before it's over with...but for now, I'm looking for something quick and simple!  Thanks again!



Travis

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_________________
Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)

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