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Speed Mod for fat cowl Commanders?

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bkirkwoo(at)elp.rr.com
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Posted: Sat Jul 14, 2007 2:42 pm Post subject: Speed Mod for fat cowl Commanders?

Has anyone come up with a clean up for the engine  cooling drag on the older Aero Commanders?  (Mine is a 560E).

 I see mods for airframe clean up, but it seems to  me that the really glaring drag comes from engine cooling.  Has work been  done on this?  Was it successful?  Has it been published?  Has  anyone come up with an STC?

 Any information would be  helpful.

   [quote][b]

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n395v

Joined: 10 Jan 2006
Posts: 450

Posted: Sun Jul 15, 2007 5:36 am Post subject: Re: Speed Mod for fat cowl Commanders?

The short answer is no, in particular to an STC.



The correct terminology is bathtub comander as opposed to fat cowled or Pensui which is hinese for fat jowls.



I suspect you could do a lot inside the cowl (where it can't be seen with a bit of sheet aluminum and fiberglass.



Thaere ain't enough of them to make an STC economically feasible.



Best speed mod available is the flap gap seal.

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Milt

bowing74(at)earthlink.net
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Posted: Sun Jul 15, 2007 7:13 am Post subject: Speed Mod for fat cowl Commanders?

Lots more power.



bilbo



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dongirod

Joined: 11 Dec 2006
Posts: 140

Posted: Sun Jul 15, 2007 9:24 am Post subject: Speed Mod for fat cowl Commanders?

Is that as in "JATO" Bilbo?



Don

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bowing74(at)earthlink.net
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Posted: Sun Jul 15, 2007 10:47 am Post subject: Speed Mod for fat cowl Commanders?

Maybe Saturn 5!!!!

bilbo



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dongirod

Joined: 11 Dec 2006
Posts: 140

Posted: Mon Jul 16, 2007 7:50 am Post subject: Speed Mod for fat cowl Commanders?

Commanderland;



I have just a curious question on this subject.  Are there any identical 

airframes with the same engines only one is 'bathtub' and the other is 

'streamlined'.  I wonder with the same engines what the difference in cruise 

speeds would be between the different 'engine pods'.  Anyone have any 

information better than a WAG or SWAG on this subject?



The frontal area does not look that much larger, although the cowling does 

curve around a larger area.



Just curious.



Don

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n395v

Joined: 10 Jan 2006
Posts: 450

Posted: Mon Jul 16, 2007 12:44 pm Post subject: Re: Speed Mod for fat cowl Commanders?

I think the cowl size is dictated more by the style of main landing gear than by the engine.

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Milt

CloudCraft(at)aol.com
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Posted: Mon Jul 16, 2007 2:04 pm Post subject: Speed Mod for fat cowl Commanders?

In a message dated 16-Jul-07 13:45:57 Pacific Daylight Time, airboss(at)excaliburaviation.com writes:

  	  Quote: 	
		  I think the cowl size is dictated more by the style of main landing gear than by the engine.



--------

Milt

2003 F1 Rocket

2006 Radial Rocket 	


 You know, that's a really good point.   The front end may be available for closing in and using NACA scoops for cooling flow (ala Orenda) but it's gonna be a bulbous nacelle no matter what, isn't it?

  

 Wing Commander Gordon



Get a sneak peak of the all-new AOL.com.

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