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Model 5 STC

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RandyTa(at)comcast.net
Guest

Posted: Sat Apr 14, 2007 10:05 am Post subject: Model 5 STC

A question for you technical guys.  Is there  an STC that allows you to increase the gross weight on a model 5 from the early  1,400 pound gross to 1,550 which was in the later model?

  

 Thanks,

  

 Randy

    [quote][b]

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rdmac(at)swbell.net
Guest

Posted: Sat Apr 14, 2007 5:28 pm Post subject: Model 5 STC

Not sure but I think STC’s only applied to certified aircraft. Jon McBean maybe able to answer your question on increasing the gross weight, if it’s even possible.   

            Roger Mac  

         

  

From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of Randy Tavishati

 Sent: Saturday, April 14, 2007 1:04 PM

 To: kitfox-list(at)matronics.com

 Subject: Model 5 STC  

  

     

A question for you technical guys.  Is there an STC that allows you to increase the gross weight on a model 5 from the early 1,400 pound gross to 1,550 which was in the later model?  

    

   

    

Thanks,  

    

   

    

Randy  

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dcsfoto

Joined: 24 Aug 2006
Posts: 120

Posted: Sat Apr 14, 2007 5:30 pm Post subject: Re: Model 5 STC

you do not need an STC. STCs only apply to aircraft that have type certificates



talk to john at Kitfox he will tell you what you need to have a safe airplane

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Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Sat Apr 14, 2007 9:48 pm Post subject: Model 5 STC

At 11:04 AM 4/14/2007, you wrote:

  	  Quote: 	
		  A question for you technical guys.  Is there an STC that allows you to increase the gross weight on a model 5 from the early 1,400 pound gross to 1,550 which was in the later model? 	


 The other posters are right. STC's only apply to certified aircraft. You can, as the builder, specify any gross weight you want. Now as to the structural mods required to go from Skystar's 1400 pound gross to 1550 pound gross you're asking a questing hashed out several times this year with, as I recall, no definitive answer. I certainly wish someone could find definitive design information for these aircraft. It would be a shame if it all just disappeared.



 John, did you get Skystar's and Denney's design information when you purchased the assets? Is such information available? Can we put together definitive information regarding the design changes to go from 1050 to 1200 for the IV, and from 1400 to 1550 for the V?



 

 

 Guy Buchanan

 San Diego, CA

 K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.     [quote][b]

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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too.

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Sun Apr 15, 2007 6:23 am Post subject: Model 5 STC

The item of STCs depends on  which part of the earth you happen to be.  I know a bit about Canada and  precious little about the U.S. regs.  In Canada and the U.S. STCs only  apply to certified aircraft.  No amateur built is  certified.

  

 In Canada you may make major  modifications to your plane but you may have to be inspected and/or do a test  flight program and the normal 26 hr of flying within 26nm of the designated  aerodrome(s).

  

 Also in Canada if you have a  BULA (Basic Ultra Light Aircraft) you are open to do pretty anything you want  with the plane and fly it. ( Square wheels while not practical are legal )   If your plane is AULA ( Advanced Ultra Light Aircraft ) then the plane meets a  conformity standard and no modifications are allowed.  that leaves us with  amateur built discussed above.

  

 Clear as Mud?.....thought  so.

  

  

 

Noel [quote]   

   --

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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

JJProbasco(at)cs.com
Guest

Posted: Sun Apr 15, 2007 8:30 am Post subject: Model 5 STC

My Model 5 kit (1/95) came with .058" wall wing spars.  When I later inquired of Sky Star what is needed for the 1550 gross, they told me only needed to switch to the .065" spars and use a NASA grade bolt for the lower wing strut to fuse connection.  They indicated some of the earlier Vixen based Model 5s had slightly lighter carry through tubes that would not be adequate; but, based on my kit serial number my fuse was adequate.  Of course, Unfortunately, I don't have this in writing from Sky Star.

 

 At the time SkyStar was having difficulty getting the .058 wall spars for the Kitfox light, so they were more than happy to exchange my spars for the .065 wall ones. 

 

      [quote][b]

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smokey_bear_40220(at)yaho
Guest

Posted: Sun Apr 15, 2007 1:12 pm Post subject: Model 5 STC

When I went to the FAA to set up my inspection for my

S-5, the lead inspector asked what gross weight I was

going to put on it.  I told him it was designed for

1550 and I wanted to increase to 1650 for the floats.

He said, "No, make it for a weight I will never

exceed, test it and insure it for that weight. 

Protects your insurance and license."

Mine is now set at 1750, a weight I will never fly to

again unless someone is shooting at me.  But I might

see 1600 or so on floats and be covered.  So far

though I haven't even been to 1550 after testing.

I had to recalculate the max allowable G load for the

new weight and put it in the logbook.  I think it came

to 3.5+ G's and I forget the minus G's.  That was also

a loading I do not want to fly anywhere near when I am

heavy.

Kurt S.  s-5/NSI turbo

--- Guy Buchanan <bnn(at)nethere.com> wrote:

 	  Quote: 	
		   At 11:04 AM 4/14/2007, you wrote:

 >A question for you technical guys.  Is there an STC

 that allows you 

 >to increase the gross weight on a model 5 from the

 early 1,400 pound 

 >gross to 1,550 which was in the later model?

__________________________________________________

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jdmcbean(at)kitfoxaircraf
Guest

Posted: Mon Apr 16, 2007 7:22 pm Post subject: Model 5 STC

Guy,

     We do have a FAQ page on the web although we have not had a  chance to get info up on the page... As for the design changes.. I'll contact  you off list.. but for the record there is not an upgrade for the Model IV 1050  to increase to 1200.. with one exception and that was specifically for float  operations and that change was not encouraged.

 [quote]   --

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