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elevators

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Vince Frazier

Joined: 10 Jan 2006
Posts: 132

Posted: Tue Sep 09, 2008 5:13 am Post subject: elevators

SNIP***** I've heard it adds 2 knots in comparision to the RV-4 elevator

counterweighted

tips.



Regards,

Jim Ayers ******SNIP



I'm dying to know who swapped elevators and made these tests on the same

day, under the same conditions, and is a good enough pilot to measure 2

knots accurately.  I am skeptical that either tip would offer any real

speed, although the RV-4 tips should be lighter due to longer arm... but

even that isn't much.



If it's speed you're after, maybe that old RV-4 tail IS the way to go.

It's got a shorter VS that, in theory, should be less drag.



Vince - RV-4 tail, and like it.

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_________________
Vince Frazier
3965 Caborn Road
Mount Vernon, IN 47620
812-464-1839 work
812-985-7309 home
F-1H Rocket, N540VF
http://vincesrocket.com/

Im7shannon(at)aol.com
Guest

Posted: Tue Sep 09, 2008 8:06 am Post subject: elevators

I think the diffrence is in the trailing edge construction, a sharp point  VS the rounded over blunt end of bent sheet metal. That is what made the RV 9  faster than they expected. Think of the difference if all the control surfaces  were done that way. Makes sense to me.

 Kevin Shannon



  

 

SNIP***** I've heard it adds 2 knots in comparision to the RV-4  elevator

counterweighted

tips.



Regards,

Jim Ayers  ******SNIP



I'm dying to know who swapped elevators and made these tests  on the same

day, under the same conditions, and is a good enough pilot to  measure 2

knots accurately.  I am skeptical that either tip would offer  any real

speed, although the RV-4 tips should be lighter due to longer arm...  but

even that isn't much.



If it's speed you're after, maybe that old  RV-4 tail IS the way to go.

It's got a shorter VS that, in theory, should be  less drag.



Vince - RV-4 tail, and like it.

 

  



Psssst...Have you heard the news? There's a new fashion blog, plus the latest fall trends and hair styles at StyleList.com.

  [quote][b]

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kahuna

Joined: 02 Feb 2007
Posts: 93

Posted: Tue Sep 09, 2008 9:03 am Post subject: elevators

"Think of the difference if all the control surfaces were done that way."

 Nooooo.

 There is a reason they are NOT all done that way.

 The speed does not come for free. You get a significant increase in control input required to deflect at higher speed.

 Mike

 

 

 [img]cid:1__=0ABBFE2CDFCEB4528f9e8a93df938(at)us.ibm.com[/img]Im7shannon---09/09/2008 12:14:16 PM---I think the diffrence is in the trailing edge construction, a sharp point VS the rounded over blunt end of bent sheet metal. Th

 

       Im7shannon(at)aol.com 

 Sent by: owner-rocket-list-server(at)matronics.com 

09/09/2008 12:05 PM  Please respond to

 rocket-list(at)matronics.com

  
 
 
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 To

[img]cid:3__=0ABBFE2CDFCEB4528f9e8a93df938(at)us.ibm.com[/img]

 rocket-list(at)matronics.com  [img]cid:3__=0ABBFE2CDFCEB4528f9e8a93df938(at)us.ibm.com[/img]

 cc

[img]cid:3__=0ABBFE2CDFCEB4528f9e8a93df938(at)us.ibm.com[/img]

   [img]cid:3__=0ABBFE2CDFCEB4528f9e8a93df938(at)us.ibm.com[/img]

 Subject

[img]cid:3__=0ABBFE2CDFCEB4528f9e8a93df938(at)us.ibm.com[/img]

 Re: elevators    [img]cid:3__=0ABBFE2CDFCEB4528f9e8a93df938(at)us.ibm.com[/img][img]cid:3__=0ABBFE2CDFCEB4528f9e8a93df938(at)us.ibm.com[/img]    

 I think the diffrence is in the trailing edge construction, a sharp point VS the rounded over blunt end of bent sheet metal. That is what made the RV 9 faster than they expected. Think of the difference if all the control surfaces were done that way. Makes sense to me.

 Kevin Shannon

  

 

 SNIP***** I've heard it adds 2 knots in comparision to the RV-4 elevator

 counterweighted

 tips.

 

 Regards,

 Jim Ayers ******SNIP

 

 I'm dying to know who swapped elevators and made these tests on the same

 day, under the same conditions, and is a good enough pilot to measure 2

 knots accurately.  I am skeptical that either tip would offer any real

 speed, although the RV-4 tips should be lighter due to longer arm... but

 even that isn't much.

 

 If it's speed you're after, maybe that old RV-4 tail IS the way to go.

 It's got a shorter VS that, in theory, should be less drag.

 

 Vince - RV-4 tail, and like it.

  

 

 

 

 Psssst...Have you heard the news? There's a new fashion blog, plus the latest fall trends and hair styles at StyleList.com.

 

 

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lesdrag(at)aol.com
Guest

Posted: Tue Sep 09, 2008 8:03 pm Post subject: elevators

I didn't do the testing for that data.  However, using density altitude and a consistent test procedure works pretty good.

 

 Jim Ayers

 

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lesdrag(at)aol.com
Guest

Posted: Tue Sep 09, 2008 8:03 pm Post subject: elevators

The same round trailing edge was used on both sets of elevators.

 

 Jim Ayers

 

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Im7shannon(at)aol.com
Guest

Posted: Wed Sep 10, 2008 3:42 am Post subject: elevators

In a message dated 9/9/2008 9:03:59 PM Pacific Daylight Time,  lesdrag(at)aol.com writes:

  	  Quote: 	
		  The same    round trailing edge was used on both sets of elevators.



Jim    Ayers

	


 

  



Psssst...Have you heard the news? There's a new fashion blog, plus the latest fall trends and hair styles at StyleList.com.

  [quote][b]

- The Matronics Rocket-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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