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FireFly Landing Gear Leg Strength Improvement

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jbhart(at)onlyinternet.ne
Guest

Posted: Mon May 19, 2008 2:05 pm Post subject: FireFly Landing Gear Leg Strength Improvement

At 10:02 PM 10/6/07 -0500, you wrote:

 	  Quote: 	
		  FireFlyer's

......................
	


 	  Quote: 	
		  I looked at attaching a 1/8 inch diameter cable to the axle to leg 

attachment bolt and running it to either the leg attachment bolt in the cage 

or to the opposite leg just below the socket.  By doing this, the 1.8G 

improved to 3.9G for the leg attachment bolt, and to 5.2G when connecting to 

the top of the opposite leg just below the socket.



This may be a good low cost and light weight improvement.  More about how 

these numbers were calculated can be seen at:



http://www.thirdshift.com/jack/firefly/firefly134.html



When, I get the parts fabricated and installed, I will put up another page. 




	


FireFlyer's,



I finished putting it on today.  How it was done can be seen at:



http://www.thirdshift.com/jack/firefly/firefly140.html



I used a loop of 3/32 inch OD diameter cable as it turned out to be the same 

strength as a single strand of 1/8 inch cable, but required few parts.  The 

trick was to figure out how to properly pretension the cable.  The total 

added weight was five ounces.  Tomorrow if the weather is ok, I hope to see 

how it reacts to the 681 takeoff and landing.



Jack B. Hart FF004

Winchester, IN

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slyck(at)frontiernet.net
Guest

Posted: Mon May 19, 2008 3:35 pm Post subject: FireFly Landing Gear Leg Strength Improvement

Jack, are the cables supposed to stretch somehow?  If not, haven't  

you lost any

bounce/terrain suppression the gear were supposed to have?



Maybe big bungees?



Now if you had a rod pushing down at the intersection of the cables,  

attached to a coil spring

inboard?...........  

BB

do not archive

On 19, May 2008, at 7:02 PM, Jack B. Hart wrote:



 	  Quote: 	
		   

 <jbhart(at)onlyinternet.net>



 At 10:02 PM 10/6/07 -0500, you wrote:

> FireFlyer's

 .......................

> I looked at attaching a 1/8 inch diameter cable to the axle to leg

> attachment bolt and running it to either the leg attachment bolt  

> in the cage

> or to the opposite leg just below the socket.  By doing this, the  

> 1.8G

> improved to 3.9G for the leg attachment bolt, and to 5.2G when  

> connecting to

> the top of the opposite leg just below the socket.

>

> This may be a good low cost and light weight improvement.  More  

> about how

> these numbers were calculated can be seen at:

>

> http://www.thirdshift.com/jack/firefly/firefly134.html

>

> When, I get the parts fabricated and installed, I will put up  

> another page.

>



 FireFlyer's,



 I finished putting it on today.  How it was done can be seen at:



 http://www.thirdshift.com/jack/firefly/firefly140.html



 I used a loop of 3/32 inch OD diameter cable as it turned out to be  

 the same

 strength as a single strand of 1/8 inch cable, but required few  

 parts.  The

 trick was to figure out how to properly pretension the cable.  The  

 total

 added weight was five ounces.  Tomorrow if the weather is ok, I  

 hope to see

 how it reacts to the 681 takeoff and landing.



 Jack B. Hart FF004

 Winchester, IN

- The Matronics Kolb-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kolb-List

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