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Non-Commander Question: Biplanes

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andrew.bridget(at)telus.n
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Posted: Fri Jan 18, 2013 9:15 am Post subject: Non-Commander Question: Biplanes

Hello everybody,  

Forgive me bringing a biplane aerodynamics question to the Commander forum but hopefully somebody can answer this.  

I was always under the impression that a biplane’s wings were staggered wither negatively (as in the Beech Staggerwing) or positively (e.g. Tiger Moth) so the bottom and top wings do not interfere with each other, so negating some lift. However, looking at a picture of the Antonov An2/An3 Colt, there is no noticeable stagger. Does the stagger negate lift conflict? Or was I wrong in my thinking?  

I do understand that the stagger changes the centre of lift on the wings, that it improves stability, and so on, but do unstaggered wings interfere, even to a slight degree, with lift generation?  

  

Thanks in advance.  

Andrew      [quote][b]

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Peter Bichier

Joined: 25 Aug 2008
Posts: 103
Location: Toledo, Ohio

Posted: Sun Jan 20, 2013 1:26 pm Post subject: Non-Commander Question: Biplanes

The staggering also helps to avoid both wings stalling at the same time; usually the lower smaller wing stalls first, then if you continue with that same AOA or increase it, then the second wing stalls.



 p.



On Sat, Jan 19, 2013 at 8:15 AM, yourtcfg(at)aol.com (yourtcfg(at)aol.com) <yourtcfg(at)aol.com (yourtcfg(at)aol.com)> wrote:

 [quote]       You are correct, the stagger is to help negate the interferance of the wings.  It also helps extend the wing cg by avereging the  the center of lift over both wigs.  The antinov wings are probably far enough apart that they bony effect wash other.  Don't know about the ch?  Jb 

 

Sent from my Verizon Wireless Phone



----- Reply message -----

From: "Andrew &amp; Bridget Watson" <andrew.bridget(at)telus.net (andrew.bridget(at)telus.net)>

 To: <commander-list(at)matronics.com (commander-list(at)matronics.com)>

Subject: Non-Commander Question: Biplanes

Date: Fri, Jan 18, 2013 9:14 am



   

Hello everybody,  

Forgive me bringing a biplane aerodynamics question to the Commander forum but hopefully somebody can answer this.   

I was always under the impression that a biplane’s wings were staggered wither negatively (as in the Beech Staggerwing) or positively (e.g. Tiger Moth) so the bottom and top wings do not interfere with each other, so negating some lift. However, looking at a picture of the Antonov An2/An3 Colt, there is no noticeable stagger. Does the stagger negate lift conflict? Or was I wrong in my thinking?   

I do understand that the stagger changes the centre of lift on the wings, that it improves stability, and so on, but do unstaggered wings interfere, even to a slight degree, with lift generation?   

  

Thanks in advance.  

Andrew       	  Quote: 	
		  



" target="_blank">http://www.matronics.com/Navigator?Commander-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	


[b]

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