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RV4 ventilation

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smullins(at)drury.edu
Guest

Posted: Mon May 29, 2006 10:39 am Post subject: RV4 ventilation

Hi Brian, 



I live in Springfield MO, and it gets really hot here in the summer. I tried

adding a NACA vent on the left side of the cockpit, right below the

throttle/mixture controls. It DID NOT work so I subsequently patched the

cutout. Must be a low pressure area right above and behind the leading edge

of the wing at the root. 



Good Luck. If you dicover something that works well, let me know. 

PS. I have had good results with the autoshade film that you can get at any

auto supply. You can easily cut it to shape and put it on the inside of the

canopy above your head in the summer, and take it off in the winter. I does

help cut the amount of solar heating you get under the canopy. 



 

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)

 

 



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SSampson.SLN21(at)london.
Guest

Posted: Mon May 29, 2006 10:42 am Post subject: RV4 ventilation

Brian on the VANS airforce web site/ RV4 section/ Thread = heater there is a 

posting by Kahuna that will interest you. I have purchased the same vents 

for installation. This might get you there:

http://www.vansairforce.com/community/showthread.php?postid=51073#post51073



Good luck, Steve



#4478

UK

PS Most of the activity appears to have moved the that site now.

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mbick(at)carolina.rr.com
Guest

Posted: Mon May 29, 2006 3:23 pm Post subject: RV4 ventilation

I just put one of the Vans pop out vents in my RV 4 and it works great. I

would recommend doing so! It seals up pretty good too.



Mike



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Warren.Moore(at)tidelands
Guest

Posted: Tue May 30, 2006 8:26 am Post subject: RV4 ventilation

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.



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smullins(at)drury.edu
Guest

Posted: Tue May 30, 2006 11:46 am Post subject: RV4 ventilation

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)

 

 



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smokyray(at)yahoo.com
Guest

Posted: Tue May 30, 2006 12:33 pm Post subject: RV4 ventilation

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" <Warren.Moore(at)tidelandsoil.com> wrote:

  



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.



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smokyray(at)yahoo.com
Guest

Posted: Tue May 30, 2006 12:35 pm Post subject: RV4 ventilation

Again, Here are some great pics...

   

  RR

   

  http://www.vansairforce.com/community/showthread.php?t=7769&page=1&pp=10



Steve Mullins <smullins(at)drury.edu> wrote:

  

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)



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James Baldwin

Joined: 16 Jan 2006
Posts: 23

Posted: Wed May 31, 2006 10:43 am Post subject: RV4 ventilation

Brian -

Where did you order the vents from?  Thx.  JBB



Brian Vickers wrote:

[quote] 



 Thanks for your response.  Yesterday I ordered the Vetterman pop-out vents.

 Like Larry the Cable TV Repairman says, "Time to get er' done!"  Thanks

 again.  By the way, I just viewed that tree top video.  That is a University

 of Washington Husky emblem/logo on the back of his hat.  I suspect he was

 flying along one of the many rivers here in Washington.  Interesting.



 Sincerely, Brian Vickers

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