---------------------------------------------------------- RV4-List Digest Archive --- Total Messages Posted Tue 05/30/06: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:26 AM - Re: RV4 ventilation (Moore, Warren) 2. 12:46 PM - Re: RV4 ventilation (Steve Mullins) 3. 01:33 PM - Re: RV4 ventilation (rob ray) 4. 01:35 PM - Re: RV4 ventilation (rob ray) ________________________________ Message 1 _____________________________________ Time: 09:26:52 AM PST US From: "Moore, Warren" Subject: RE: RV4-List: RV4 ventilation --> RV4-List message posted by: "Moore, Warren" Brian, I put a naca vent (from Van's) on the right side of the fuse. as far forward as possible and just under the cowl cheek. ran a scat tube to the lower right side of the instrument panel to an alum. vent....it works just ok. Also installed a naca vent on the underside of the the right wing, (like on the RV8's) to a scat tube, to a large 3" vent mounted just forward of the rear stick, for the rear passenger.....works great! also put a tee in the rear vent scat tube and ran a 1-1/4 in scat tube to the front seat (thur the wing spar where the plans show a routing for rear seat heat (I have no rear seat heat). to a small vent mounted down low by the fuel selector. When flying solo, I can reach back, close the rear seat vent and open the front one full, just works great! Still get a lot of air in front and back when both are open. I working now on a way to hold my canopy open about 3 inches for taxi....don't care how many vents you have, on ground its just hot under a bubble canopy. Warren Moore rv4 n223wm, 35 hrs. -----Original Message----- From: Brian Vickers [mailto:brianvic@msn.com] Sent: Monday, May 29, 2006 10:27 AM Subject: RV4-List: RV4 ventilation --> RV4-List message posted by: "Brian Vickers" Hi all, I am procrastinating over installation of cockpit ventilation. I walk the rows of completed RV4's at fly-ins, etc. and see many different configurations for getting air into the cockpit. Everything from holes in the wing root fairings, NACA inlets placed nearly everywhere, to pop-outs. Does anyone out there have a system that has worked well for them? I'm also interested in designs and inlet locations that don't work. I am building a very simple, light weight manual bird. Thanks for your help in advance. Very sincerely, Brian N. Vickers, MAI RPA Real Property Analysis, LLC P.O. Box 11790 Bainbridge Island, WA 98110 Ph 206-780-9814 Fx 206-842-2496 ________________________________ Message 2 _____________________________________ Time: 12:46:01 PM PST US From: "Steve Mullins" Subject: RE: RV4-List: RV4 ventilation --> RV4-List message posted by: "Steve Mullins" Brian and all, On your holding your canopy open 3 " while taxiing!!! I hope I haven't committed some horrible sin, but I have been taxiing my RV 4 with the canopy open for 4 years with no problems. Steven D. Mullins Associate Professor of Economics Co-director 06-07 Convocation Series: http://www.drury.edu/post911 "Preparing ethical leaders for the global business community" The Breech School of Business Administration Drury University 417.889.5609 (Home) 417.873.7299 (Office) -----Original Message----- From: owner-rv4-list-server@matronics.com [mailto:owner-rv4-list-server@matronics.com] On Behalf Of Moore, Warren Sent: Tuesday, May 30, 2006 11:25 AM Subject: RE: RV4-List: RV4 ventilation --> RV4-List message posted by: "Moore, Warren" --> Brian, I put a naca vent (from Van's) on the right side of the fuse. as far forward as possible and just under the cowl cheek. ran a scat tube to the lower right side of the instrument panel to an alum. vent....it works just ok. Also installed a naca vent on the underside of the the right wing, (like on the RV8's) to a scat tube, to a large 3" vent mounted just forward of the rear stick, for the rear passenger.....works great! also put a tee in the rear vent scat tube and ran a 1-1/4 in scat tube to the front seat (thur the wing spar where the plans show a routing for rear seat heat (I have no rear seat heat). to a small vent mounted down low by the fuel selector. When flying solo, I can reach back, close the rear seat vent and open the front one full, just works great! Still get a lot of air in front and back when both are open. I working now on a way to hold my canopy open about 3 inches for taxi....don't care how many vents you have, on ground its just hot under a bubble canopy. Warren Moore rv4 n223wm, 35 hrs. -----Original Message----- From: Brian Vickers [mailto:brianvic@msn.com] Sent: Monday, May 29, 2006 10:27 AM Subject: RV4-List: RV4 ventilation --> RV4-List message posted by: "Brian Vickers" Hi all, I am procrastinating over installation of cockpit ventilation. I walk the rows of completed RV4's at fly-ins, etc. and see many different configurations for getting air into the cockpit. Everything from holes in the wing root fairings, NACA inlets placed nearly everywhere, to pop-outs. Does anyone out there have a system that has worked well for them? I'm also interested in designs and inlet locations that don't work. I am building a very simple, light weight manual bird. Thanks for your help in advance. Very sincerely, Brian N. Vickers, MAI RPA Real Property Analysis, LLC P.O. Box 11790 Bainbridge Island, WA 98110 Ph 206-780-9814 Fx 206-842-2496 ________________________________ Message 3 _____________________________________ Time: 01:33:04 PM PST US From: rob ray Subject: RE: RV4-List: RV4 ventilation --> RV4-List message posted by: rob ray Brian, All of the previous suggestions work, I have one of each! Over the years I have tried everything including bypassing my heat muff and running baffle air into the cockpit. Works fine above 5K but hot down low. Here is what worked and improved what I had... An aeronautical engineer looked at my airplane and told me the two lowest pressure and highest pressure areas, the canopy rail and right in front of the leading edge of the wing being very low. The bottom of the rear part of the cowl cheek, fuselage sides above the landing gear and under the wing, being very high. So, I installed and really like two of Larry Vettermans pop-out round vents, one right above the throttle quadrant and the other in front of the back seat on the fuselage 8" below the canopy rail. I also have three NACA scoops, one on the front lower left fuselage which like Warren's works well. I also installed two on the canopy rail before I knew better. One thing that helped both of them was placing VG's in front of them, 50% improvement in airflow. Hey, I live where it is hot year-round! However, the absolute best modification was drilling holes around my baggage door bulkhead to allow the air to draft out the rear fuselage. "Sucking the air out" of the cockpit is not a new idea, look at Christen Eagles. They have reverse NACA scoops. Rear seat passengers tell me they can lay their hands over the holes and feel the suction at cruise speed. The aft part of the canopy is very high pressure and a rear facing vent on the lower part of the back of the canopy fairing on one RV4 reported very good airflow into the cockpit. He said he got the idea off a T-18. He had a choke cable to open and close the small door. Another simple fix to summer heat is to use the RV4's superior performance and fly above 5K if you go anywhere. For some great ideas of the canopy taxi position hold-back devices, go to Doug Reeves website http://www.vansairforce.com/community/showthread.php?t=7769&page=1&pp=10 You will find alot of great pictures of canopy taxi positions installations (including mine)... Good Luck! RR "Moore, Warren" wrote: --> RV4-List message posted by: "Moore, Warren" Brian, I put a naca vent (from Van's) on the right side of the fuse. as far forward as possible and just under the cowl cheek. ran a scat tube to the lower right side of the instrument panel to an alum. vent....it works just ok. Also installed a naca vent on the underside of the the right wing, (like on the RV8's) to a scat tube, to a large 3" vent mounted just forward of the rear stick, for the rear passenger.....works great! also put a tee in the rear vent scat tube and ran a 1-1/4 in scat tube to the front seat (thur the wing spar where the plans show a routing for rear seat heat (I have no rear seat heat). to a small vent mounted down low by the fuel selector. When flying solo, I can reach back, close the rear seat vent and open the front one full, just works great! Still get a lot of air in front and back when both are open. I working now on a way to hold my canopy open about 3 inches for taxi....don't care how many vents you have, on ground its just hot under a bubble canopy. Warren Moore rv4 n223wm, 35 hrs. -----Original Message----- From: Brian Vickers [mailto:brianvic@msn.com] Sent: Monday, May 29, 2006 10:27 AM Subject: RV4-List: RV4 ventilation --> RV4-List message posted by: "Brian Vickers" Hi all, I am procrastinating over installation of cockpit ventilation. I walk the rows of completed RV4's at fly-ins, etc. and see many different configurations for getting air into the cockpit. Everything from holes in the wing root fairings, NACA inlets placed nearly everywhere, to pop-outs. Does anyone out there have a system that has worked well for them? I'm also interested in designs and inlet locations that don't work. I am building a very simple, light weight manual bird. Thanks for your help in advance. Very sincerely, Brian N. Vickers, MAI RPA Real Property Analysis, LLC P.O. Box 11790 Bainbridge Island, WA 98110 Ph 206-780-9814 Fx 206-842-2496 --------------------------------- Blab-away for as little as 1/min. Make PC-to-Phone Calls using Yahoo! Messenger with Voice. ________________________________ Message 4 _____________________________________ Time: 01:35:35 PM PST US From: rob ray Subject: RE: RV4-List: RV4 ventilation --> RV4-List message posted by: rob ray Again, Here are some great pics... RR http://www.vansairforce.com/community/showthread.php?t=7769&page=1&pp=10 Steve Mullins wrote: --> RV4-List message posted by: "Steve Mullins" Brian and all, On your holding your canopy open 3 " while taxiing!!! I hope I haven't committed some horrible sin, but I have been taxiing my RV 4 with the canopy open for 4 years with no problems. Steven D. Mullins Associate Professor of Economics Co-director 06-07 Convocation Series: http://www.drury.edu/post911 "Preparing ethical leaders for the global business community" The Breech School of Business Administration Drury University 417.889.5609 (Home) 417.873.7299 (Office) -----Original Message----- From: owner-rv4-list-server@matronics.com [mailto:owner-rv4-list-server@matronics.com] On Behalf Of Moore, Warren Sent: Tuesday, May 30, 2006 11:25 AM Subject: RE: RV4-List: RV4 ventilation --> RV4-List message posted by: "Moore, Warren" --> Brian, I put a naca vent (from Van's) on the right side of the fuse. as far forward as possible and just under the cowl cheek. ran a scat tube to the lower right side of the instrument panel to an alum. vent....it works just ok. Also installed a naca vent on the underside of the the right wing, (like on the RV8's) to a scat tube, to a large 3" vent mounted just forward of the rear stick, for the rear passenger.....works great! also put a tee in the rear vent scat tube and ran a 1-1/4 in scat tube to the front seat (thur the wing spar where the plans show a routing for rear seat heat (I have no rear seat heat). to a small vent mounted down low by the fuel selector. When flying solo, I can reach back, close the rear seat vent and open the front one full, just works great! Still get a lot of air in front and back when both are open. I working now on a way to hold my canopy open about 3 inches for taxi....don't care how many vents you have, on ground its just hot under a bubble canopy. Warren Moore rv4 n223wm, 35 hrs. -----Original Message----- From: Brian Vickers [mailto:brianvic@msn.com] Sent: Monday, May 29, 2006 10:27 AM Subject: RV4-List: RV4 ventilation --> RV4-List message posted by: "Brian Vickers" Hi all, I am procrastinating over installation of cockpit ventilation. I walk the rows of completed RV4's at fly-ins, etc. and see many different configurations for getting air into the cockpit. Everything from holes in the wing root fairings, NACA inlets placed nearly everywhere, to pop-outs. Does anyone out there have a system that has worked well for them? I'm also interested in designs and inlet locations that don't work. I am building a very simple, light weight manual bird. Thanks for your help in advance. Very sincerely, Brian N. Vickers, MAI RPA Real Property Analysis, LLC P.O. Box 11790 Bainbridge Island, WA 98110 Ph 206-780-9814 Fx 206-842-2496 ---------------------------------