From: N295VV@aol.com
Message-ID: <f8.765af3d.27bf583e@aol.com>
Date: Fri, 16 Feb 2001 23:29:50 EST
Subject: Re: Cabin Heat Valve
To: lancair.list@olsusa.com
Reply-To: lancair.list@olsusa.com
Mime-Version: 1.0

          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> 
>>
Rob Wolf:

The cabin heat valve is an unadulterated piece of s**t, as is the design 
itself.

Look into the files on this site, and you will see several entries by me on 
this subject dating back several years.

If you are bothered by dumping hot air overboard when you don't want it 
coming into the cabin, just consider that your engine has given up several 
horsepower to compress and then cool that air which is being wasted.  This 
means the wastegate is constantly trying to compensate for the compressed air 
being dumped overboard through this opening--dollars being dumped overboard 
in lost horsepower.

And, yes, the damn thing never quite shuts off completely, so in the summer 
you are adding 200 plus heat to your already hot cabin.

The alternate design, which I paid $500 or so bucks to Lancair is also a 
piece of crap, so don't waste your money--I will sell it to you cheap if you 
want to try it.  It was based on two concentric tubes--one fixed, and one 
moveable.  Trouble is, the two tubes have about a tenth of an inch difference 
in diameters, making it leak more than the flapper valve type you have 
described.

You would think that since 1991 and now, the firm would have made a heat 
valve that functioned correctly.  You would think that, wouldn't you....

Well, the firm is too busy designing new concepts, and its core business and 
the problems that need to be solved in the core business still go unattended 
and unfixed.  So, don't bother them with questions about your heat 
valve--they didn't have time to solve the problem when I brought it to their 
attention in 1996, and they certainly won't address it now--they have new 
concepts to address!

Just put the damned thing in or build one your self that doesn't waste engine 
power by dumping unwanted heated air overboard.

David Jones, Pecatonica, Illinois

(Gees Lance, if you got irritated about the Nylaflow comments last week, will 
you get irritated enough by this thread to make someone fix this problem, or 
is it not a problem?)
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>