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aft CG service letter

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Mark.Summers(at)lwbref.co
Guest

Posted: Sun Feb 12, 2006 8:12 am Post subject: aft CG service letter

I read in some of the service letters/bulletins that the model 4 KF aft CG

limit had been expanded to 16" from 14.78" [I think]. From what I have read

aft CG was 28% of mean aerodynamic chord[ 51" on kitfox 2]. I guess what I

am asking does anyone know whether this applies to kitfox 1,2,3 etc? I

think mac is the wing measurement leading to trailing edge?  Does the

Kitfox 4 have a different wing measurement than a kf2. Thanks Mark

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Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Sun Feb 12, 2006 9:19 am Post subject: aft CG service letter

This probably won't answer your question, Mark, but let me drop a 

couple of numbers that I have come across in building my IV. The 

original manual states that the MAC is 51.5"  and the later manual, 

revised in '03, shows the MAC at 51.1"  This could be due to the change 

of flaperon hinge brackets, between when my IV was built in '94, and 

when the revised manual was done in '03. Does anybody know for 

sure...John McBean, are you listening? And of course the MAC is 

apparently measured from the leading edge to the trailing edge of the 

flaperon, at least it seems that way according to what I can figure out 

right now (with my wings folded).



Lynn

On Sunday, February 12, 2006, at 11:09  AM, Mark.Summers(at)lwbref.com 

wrote:



 	  Quote: 	
		   



 I read in some of the service letters/bulletins that the model 4 KF 

 aft CG

 limit had been expanded to 16" from 14.78" [I think]. From what I have 

 read

 aft CG was 28% of mean aerodynamic chord[ 51" on kitfox 2]. I guess 

 what I

 am asking does anyone know whether this applies to kitfox 1,2,3 etc? I

 think mac is the wing measurement leading to trailing edge?  Does the

 Kitfox 4 have a different wing measurement than a kf2. Thanks Mark

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_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

Mark.Summers(at)lwbref.co
Guest

Posted: Sun Feb 12, 2006 5:14 pm Post subject: aft CG service letter

I have a feeling that the reference mainly to kf 4 aft cg increase is

because the higher max gross 1200lbs on some of the 4's would see a use for

baggage compartment weights increasing the aft cg where the kf  1,2 and 3

didn't have much weight room for baggage anyway. I guess I am trying to

figure out if aft cg less than 16" but more than 14.28" would be dangerous

in a kf2 because after I get through welding on the new tail I may have to

add ballast in the motor mount area to keep my cg under 14.28 and I really

don't want to do that if at all possible. Thanks Mark

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jdmcbean(at)cableone.net
Guest

Posted: Mon Feb 13, 2006 9:09 am Post subject: aft CG service letter

The Kitfox IV has a different WING then the Model 1, 2 or 3.. although some

3's have used a IV wing.



Fly Safe !!

John & Debra McBean

www.sportplanellc.com

"The Sky is not the Limit...  It's a Playground"



--

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