KR> test slow night

[CldLk-Tim]

Changing the wing will also require a re-visit to the tail volume, as one of 
tail's jobs is to counter the cm/pitching moment of the wingWhich I'd 
guess the Coco bar wing would have more of.Tim

- Original Message - 
From: "Jeff Scott" 



There's a lot more to it than just mounting a constant cord wing.  The 
airfoil, cord, incidence, washout, and wing area are probably more important 
than constant cord vs taperwing vs eliptical wing planform.  The RV series 
aircraft use a constant cord wing and I certainly don't think of them as 
slow or handling like a truck.  The point is that the wing really needs to 
be designed for the aircraft.  For the KR series, a PhD candidate designed 
the new AS series airfoil specifically for this plane.  From everything I've 
seen, it works quite well.  Additionally, the old RAF series wing seems to 
work pretty good as well.  One could certainly design a constant cord 
(Hershey bar) wing for the plane and with a few iterations, probably make it 
work just as well as the current wing plans, but why?

Jeff Scott

KR> test slow night

[Jeff Scott]

There's a lot more to it than just mounting a constant cord wing.  The airfoil, 
cord, incidence, washout, and wing area are probably more important than 
constant cord vs taperwing vs eliptical wing planform.  The RV series aircraft 
use a constant cord wing and I certainly don't think of them as slow or 
handling like a truck.  The point is that the wing really needs to be designed 
for the aircraft.  For the KR series, a PhD candidate designed the new AS 
series airfoil specifically for this plane.  From everything I've seen, it 
works quite well.  Additionally, the old RAF series wing seems to work pretty 
good as well.  One could certainly design a constant cord (Hershey bar) wing 
for the plane and with a few iterations, probably make it work just as well as 
the current wing plans, but why?  

Jeff Scott
Los Alamos, NM



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KR> test slow night

[Emory Luth]

Keith asked:

On Wed, Mar 4, 2009 at 7:13 AM, Keith and Martha Crawford <
mar...@simerson.net> wrote:

> I guess that I stated that wrong :-) what I ment was what would happen
> if you used a straight wing in sted of a tapered wing?
>
>
>
>
> Keith,

I know there is a guy out there that has a straight (non-tapered) wing KR.
He was at the 2008 KR Gathering and said it *was*  flying.  It sounded to me
like it resulted in a lot of undesirable flying characteristics.  Basically
handling more like an underpowered Cessna or a Sherman tank than a KR.  I do
not believe the guy built it himself, he was just flying it.  He was
contemplating putting the "new" airfoil on it.

I don't think I would spend time building an aircraft based on the design of
a candy bar, but I like to go fast as efficiently as possible and Mr.
Langford has kindly shown us how to do that.  Perhaps Mr. Langford or some
other reputable source will chime in and confirm/deny my novice opinion.  I
hope this helps.

Regards,


Emory
KR2S boat planned to be at the 2009 KR Gathering for you all to
inspect/critique (its not going in the campfire no matter how bad y'all
think it is!)
Central Illinois



-- 
Emory Luth, COO
Midwest Precision Parts
1450 North 2680 East
Allerton, IL 61810
W 217.837.2934
M 217.714.4446
MidwestPrecisionParts.com

KR> test slow night

[Keith and Martha Crawford]

I guess that I stated that wrong :-) what I ment was what would happen  
if you used a straight wing in sted of a tapered wing?



Keith and Martha Crawford
mar...@simerson.net ? ke...@simerson.net
http://martha.simerson.net

You are never too old to set another goal or to dream a new dream. - 
C.S. Lewis

KR> test slow night

[Dj Merrill]

Keith and Martha Crawford wrote:
> ok it's a slow night, so I will throw this one out there. What would  
> happen if you put a hersey bar wing on a KR?

Icarus comes to mind...  All that chocolate would melt!  *wink*



-Dj
do not archive

KR> test slow night

[Glenn Martin]

Keith and Martha Crawford wrote:
> ok it's a slow night, so I will throw this one out there. What would  
> happen if you put a hersey bar wing on a KR?
>
> Keith and Martha Crawford
> mar...@simerson.net ? ke...@simerson.net
> http://martha.simerson.net
>
> You are never too old to set another goal or to dream a new dream. - 
> C.S. Lewis
>
>
>
>
>
>
>
> ___
> Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp
> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
> please see other KRnet info at http://www.krnet.org/info.html
>
>   
ok. I'll bite..what happens?

-- 
Glenn Martin
Owner
Martek Mississippi
13238 Hudson-Krohn Rd
Biloxi, MS, 39532
rep...@martekmississippi.com

KR> test slow night

[Keith and Martha Crawford]

ok it's a slow night, so I will throw this one out there. What would  
happen if you put a hersey bar wing on a KR?

Keith and Martha Crawford
mar...@simerson.net ? ke...@simerson.net
http://martha.simerson.net

You are never too old to set another goal or to dream a new dream. - 
C.S. Lewis