---------------------------------------------------------- Rocket-List Digest Archive --- Total Messages Posted Wed 05/21/08: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:33 PM - Cockpit cooling (Jim Stone) 2. 09:29 PM - Re: Cockpit cooling (rocketman) 3. 09:39 PM - Re: Cockpit cooling (Fred LaForge) 4. 09:59 PM - Re: Cockpit cooling (H.Ivan Haecker) ________________________________ Message 1 _____________________________________ Time: 07:33:49 PM PST US From: "Jim Stone" Subject: Rocket-List: Cockpit cooling Hey Guys, My cockpit air comes from a two inch scat going from a hole in the upper rear baffle on the left/center side, same side as my oil cooler, and then goes to a firewall mixer valve which allows heat muff air to be mixed with it. My complaint is, this air is too warm on a day that is 75 degrees or warmer. I have a Naca vent under the right wing that brings in cool outside air but it goes only to the rear seater. I would like to change the front seat set up and leave the rear seat the way it is. My question is, has anyone put a 2" hole in the forward horizontal baffle, in front of number 2 cyl and pulled the air down and aft to the mixer valve on the firewall? Or, has anyone just tied a scat hose along the top of the engine from the aft baffle to the cowl opening in front of number 2 cyl. in an effort to catch the air before it warms up. My setup is similar to John Harmon's, and he told me years ago that it works fine for him, so I assumed if it works in the Bakersfield desert, it will work in Louisville. Perhaps my setup is not as similar to John's as I think. TIA, Jim Stone ________________________________ Message 2 _____________________________________ Time: 09:29:16 PM PST US From: rocketman Subject: Re: Rocket-List: Cockpit cooling At 07:31 PM 5/21/2008, you wrote: Bakersfield is a dry HEAT!! Ha ha! You have that muggy heat! Check with 2nelson@prodigy.net Greg nelson. He has a nice set up that I was going to do but never did Harry >Hey Guys, >My cockpit air comes from a two inch scat going from a hole in the >upper rear baffle on the left/center side, same side as my oil >cooler, and then goes to a firewall mixer valve which allows heat >muff air to be mixed with it. My complaint is, this air is too warm >on a day that is 75 degrees or warmer. I have a Naca vent under the >right wing that brings in cool outside air but it goes only to the >rear seater. I would like to change the front seat set up and leave >the rear seat the way it is. My question is, has anyone put a 2" >hole in the forward horizontal baffle, in front of number 2 cyl and >pulled the air down and aft to the mixer valve on the firewall? Or, >has anyone just tied a scat hose along the top of the engine from >the aft baffle to the cowl opening in front of number 2 cyl. in an >effort to catch the air before it warms up. >My setup is similar to John Harmon's, and he told me years ago that >it works fine for him, so I assumed if it works in the Bakersfield >desert, it will work in Louisville. Perhaps my setup is not as >similar to John's as I think. > >TIA, >Jim Stone > ________________________________ Message 3 _____________________________________ Time: 09:39:35 PM PST US From: "Fred LaForge" Subject: Re: Rocket-List: Cockpit cooling Jim, I tried air off the back of the engine plenum on my RV-4,,,, Too warm. I would recomend a NACA vent. and thick insulation on firewall and under your feet. ----- Original Message ----- From: Jim Stone To: rocket-list@matronics.com Sent: Wednesday, May 21, 2008 7:31 PM Subject: Rocket-List: Cockpit cooling Hey Guys, My cockpit air comes from a two inch scat going from a hole in the upper rear baffle on the left/center side, same side as my oil cooler, and then goes to a firewall mixer valve which allows heat muff air to be mixed with it. My complaint is, this air is too warm on a day that is 75 degrees or warmer. I have a Naca vent under the right wing that brings in cool outside air but it goes only to the rear seater. I would like to change the front seat set up and leave the rear seat the way it is. My question is, has anyone put a 2" hole in the forward horizontal baffle, in front of number 2 cyl and pulled the air down and aft to the mixer valve on the firewall? Or, has anyone just tied a scat hose along the top of the engine from the aft baffle to the cowl opening in front of number 2 cyl. in an effort to catch the air before it warms up. My setup is similar to John Harmon's, and he told me years ago that it works fine for him, so I assumed if it works in the Bakersfield desert, it will work in Louisville. Perhaps my setup is not as similar to John's as I think. TIA, Jim Stone ________________________________ Message 4 _____________________________________ Time: 09:59:23 PM PST US From: "H.Ivan Haecker" Subject: Re: Rocket-List: Cockpit cooling Jim, I had a similar set up on my rv-4. The air was taken off the rear baffle and run into the cockpit. It was ok until it got hot in the summertime. It was really bad when I slowed down in the pattern.I changed the set up and extended the tube forward across the top of the crankcase to the left opening in the front of the cowl. That was much better. I now measure only a 3-4 degree increase in temperature compared to the rear vent outlet which comes from under the wing. I terminated the scat tube with an aluminum end to dress it up visually up front. With a 540 engine instead of a 320 the heat picked up may be more especially due to the longer length. I plan to do the same on my rocket if I ever can finish it.... I can get pictures if you need them. Ivan Haecker rv-4 1455hrs. S. Cen. TX ----- Original Message ----- From: Jim Stone To: rocket-list@matronics.com Sent: Wednesday, May 21, 2008 9:31 PM Subject: Rocket-List: Cockpit cooling Hey Guys, My cockpit air comes from a two inch scat going from a hole in the upper rear baffle on the left/center side, same side as my oil cooler, and then goes to a firewall mixer valve which allows heat muff air to be mixed with it. My complaint is, this air is too warm on a day that is 75 degrees or warmer. I have a Naca vent under the right wing that brings in cool outside air but it goes only to the rear seater. I would like to change the front seat set up and leave the rear seat the way it is. My question is, has anyone put a 2" hole in the forward horizontal baffle, in front of number 2 cyl and pulled the air down and aft to the mixer valve on the firewall? Or, has anyone just tied a scat hose along the top of the engine from the aft baffle to the cowl opening in front of number 2 cyl. in an effort to catch the air before it warms up. My setup is similar to John Harmon's, and he told me years ago that it works fine for him, so I assumed if it works in the Bakersfield desert, it will work in Louisville. Perhaps my setup is not as similar to John's as I think. TIA, Jim Stone ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rocket-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Rocket-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rocket-list Browse Digests http://www.matronics.com/digest/rocket-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.