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Kolb model differences Converting a FireStar to an Ultra L

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jbhart(at)onlyinternet.ne
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Posted: Sat Mar 17, 2007 11:15 am Post subject: Kolb model differences Converting a FireStar to an Ultra L

At 01:07 PM 3/16/07 -0700, you wrote:

 	  Quote: 	
		  

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John,



Thank you for the info.  It looks like a FireStar could be easily be moved 

into the ultra light vehicle 103.7 category by getting rid of 21 pounds.  

This could be done by smaller wheels, less paint and a lighter engine.



Using AC 103-7 Appendix 1, 2, 3 & 4, a 33 hp Mini III Simonini engine would 

push it 63 mph.  Changing to this engine would put the FireStar under the 

weight limit.



Calculations for a gross weight of 550 pounds gives a stall speed of 27.5 

mph.  If one assumes a converted (re-engined) FireStar weighs 248 pounds 

dry, with five gallons of fuel and flown by a standard FAA 170 pound pilot, 

the wing loading would be 3.2 pounds per square foot.  This would give a 

stall speed of 25 mph with out flaperons.



One major advantage to converting is the extra load carrying capacity of 

fifty pounds over a FireFly.



Jack B. Hart FF004

Winchester, IN

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