Return-Path: Received: from imo14.mx.aol.com ([198.81.17.4]) by truman.olsusa.com (Post.Office MTA v3.1.2 release (PO203-101c) ID# 0-44819U2500L250S0) with ESMTP id AAA11071 for ; Wed, 9 Sep 1998 04:12:53 -0400 Received: from N295VV@aol.com by imo14.mx.aol.com (IMOv16.1) id 8QRPa09043 for ; Wed, 9 Sep 1998 04:12:23 -0400 (EDT) From: N295VV@aol.com Message-ID: Date: Wed, 9 Sep 1998 04:12:23 EDT To: lancair.list@olsusa.com Subject: Re: heater, IV X-Mailer: AOL 3.0 for Windows 95 sub 18 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> From: n295vv@aol.com More on the heater. Today I removed the old flapper-valve heater system and prepared to install the $400 replacement kit. The new kit is well-designed. It seems to have been prepared with much thought. In installing it, you simply remove all pieces of the old system, and slip the new axial valve through the firewall in place of the old flapper valve. Lancair has provided lots of scat tubing and some very nice flow diverter valves for the front and back seats-something that was lacking in the earlier assembly of the system. The axial valve is much improved over the old flapper valve, and it looks like it will eliminate bleed to the cabin in the summer. Whomever designed it deserves much credit. In the instruction sheet there is some mention of heat muff vs. non-heat muff engines. Obviously I have the latter. Since I am not a fan of the turbo sonic bleed because it robs the engine of MP, I am going to remove this, and attempt to bleed hot air from the crossover tube. I think it is possible to grind a hole on top of the crossover tube baffle (a nasty job, since it is behind the engine and in front of the firewall) , and weld up a nice saddle assembly that will fit over the hole and bolt securely onto the crossover tube. Before I do this, I would like to know if anyone out there has the heat muff type heater, and if so, do you get good airflow into the cockpit with it? Since I still have the old flapper valve and its push-pull cable is still installed, I might consider leaving the sonic system installed, and use the flapper valve to switch between it and the heat muff--the sonic system to be used only in an emergency if the heat muff isnt providing enough heat. (on second thought, I have decided not to do this--since the flapper valve leaks like heck, I would always be dumping MP overboard somewhere with a loss of power.) Your valued comments would be much appreciated. David Jones Pecatonica, Illinois