[WWI] Anhedral vs Negative Dihedral (was Re: Added:Nieuport 28 and more!) (UNCLASSIFIED)

[Acosta, Kenneth J CTR MDA/DTC]

Classification:  UNCLASSIFIED 
Caveats: NONE

De-lurking for a brief moment (my interest always piques whenever
aerodynamics is mentioned).

According to Ray Whitford in my handy copy of "Design for Air Combat":

"Viewed from the front, aircraft generally appear to have their wings
inclined upwards, with the tips being higher than the roots (this is
called dihedral), or downwards, with tips lower than their roots
(anhedral or negative dihedral)."

Looks like both are correct.  Give me a shout if you need to know
Whitford's credentials.

Re-lurking-
Ken A.



Date: Wed, 1 Aug 2007 09:41:49 -0500
From: "Tom Mason" <tom.mason at charter.net>
Subject: Re: [WWI] Added:Nieuport 28 and more!
To: "World War I Modeling Mailing List" <wwi at wwi-models.org>
Message-ID: <00ba01c7d44a$1b780f70$b4960d47 at lssah>
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	reply-type=original

Andy,

I am going by what I have read on aerodynamics. They all state that the 
opposite of dihedral is anhedral.

T.O.M.
----- Original Message ----- 
From: "Andy Bannister" <a.bann at ntlworld.com>
To: "World War I Modeling Mailing List" <wwi at wwi-models.org>
Sent: Wednesday, August 01, 2007 6:57 AM
Subject: Re: [WWI] Added:Nieuport 28 and more!


> Actually, Scott's correct Tom. The word "dihedral" can be negative or 
> positive. There is no such thing as anhedral in this context.
According to 
> my dictionary anyway.
>
> Andy
>
>>
>> From: "Tom Mason" <tom.mason at charter.net>
>> Date: 2007/08/01 Wed AM 04:25:24 GMT
>> To: "World War I Modeling Mailing List" <wwi at wwi-models.org>
>> Subject: Re: [WWI] Added:Nieuport 28 and more!
>>
>> Scott,
>> Very nice Nieu. 28 & Sopwith Triplane.
>> One small thing and not really a criticism. The term negative
dihedral is
>> incorrect. It should be called anhedral.
>>
>> T.O.M.
Classification:  UNCLASSIFIED 
Caveats: NONE