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  #11  
Old 06-14-2018, 06:15 PM
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DanH DanH is offline
 
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Quote:
Originally Posted by boulderick View Post
Good question. I'm looking at images for RV engine baffles and most don't have seals behind the spinner. Makes sense to add these as I can imagine air escaping through the dead zone right behind the spinner if there is nothing there to stop it. Seems I may be losing quite a lot of cooling air that better seals will improve.
http://www.vansairforce.com/communit...d.php?t=141528
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  #12  
Old 06-14-2018, 06:19 PM
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Default Standard cooler on my -6A

I have the early, (1993) standard cooler, --looks like the one you picture.

Ron
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  #13  
Old 06-14-2018, 07:21 PM
boulderick boulderick is offline
 
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Thanks, Dan. That's exactly the thread I need.
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  #14  
Old 06-14-2018, 07:58 PM
boulderick boulderick is offline
 
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Originally Posted by jpowell13 View Post
Mine is in the same location. My engine came out of a Musketeer with the original baffling which I adapted and used in my plane. The inlet ramp on factory planes tends to be much more vertical with the cooler facing the ram air more directly than with the 6A, so I fabricated a simple scoop over the oil cooler to catch more air. I think it works well. An added bonus is that it moves the weight of the cooler forward. John
John, can you post a picture of your scoop and/or the dimensions?
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  #15  
Old 06-14-2018, 09:51 PM
jpowell13 jpowell13 is offline
 
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I'll try to get by the apt tomorrow and take a picture. John
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  #16  
Old 06-15-2018, 12:11 PM
jpowell13 jpowell13 is offline
 
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Boulderick, Those pictures follow. I'm not an aerodynamics expert by any means, just a builder, but I think the scoop is worth a try. I used bolts to attach mine, but don't see why blind rivets wouldn't work to hold yours in place. John




Last edited by jpowell13 : 06-15-2018 at 12:24 PM.
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  #17  
Old 06-15-2018, 01:52 PM
rvbuilder2002 rvbuilder2002 is offline
 
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Originally Posted by jpowell13 View Post
Boulderick, Those pictures follow. I'm not an aerodynamics expert by any means, just a builder, but I think the scoop is worth a try. I used bolts to attach mine, but don't see why blind rivets wouldn't work to hold yours in place. John
I wouldn't bother with trying the scoop until until you resolve some of the serious issues with your baffle installation that are evident in the photo links you posted.
Compare what you have to some of the details discussed in the thread that Dan posted the link too.
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  #18  
Old 06-16-2018, 08:48 AM
boulderick boulderick is offline
 
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Quote:
Originally Posted by jpowell13 View Post
Boulderick, Those pictures follow. I'm not an aerodynamics expert by any means, just a builder, but I think the scoop is worth a try. I used bolts to attach mine, but don't see why blind rivets wouldn't work to hold yours in place. John



Thanks, John.
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  #19  
Old 06-16-2018, 08:50 AM
boulderick boulderick is offline
 
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Originally Posted by rvbuilder2002 View Post
I wouldn't bother with trying the scoop until until you resolve some of the serious issues with your baffle installation that are evident in the photo links you posted.
Compare what you have to some of the details discussed in the thread that Dan posted the link too.
Yup. There's an order to things to try here and I want to make a change, fly the airplane, make another change, and fly again. I'm new to this and want to learn as much as I can about airflow over the engine.
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  #20  
Old 06-16-2018, 11:12 AM
rvbuilder2002 rvbuilder2002 is offline
 
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Good plan, but there are numerous things that are needed that wouldn't be an experiement/change, they are a given because your baffle installation is not even up to the typical standard installation.

As already mentioned, the seals totally missing on the fwd dam are a major error.

Another backwards seals for the inlet ramps. With them attached to the ramps they are probably not doing much in regards to sealing.
All of the inlet seals should be attached to the cowl and lap onto the inlet part of the baffling so that dynamic pressure pushes/seals them against the baffles.
In your case, dynamic pressure like pushes them away from the cowl.

Considering these major flaws in the installation, there are likely more that could be seen if you posted more photos of the entire installation.
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