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Sullivan Aluminum QD Ball links strong enough? - 11/6/2010 10:18 PM   
ml3456


 

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From: Darien, IL, USA
Status: offline 		I noticed that Sullivan make some 4-40 aluminum ball links. has anyone have any experience how strong they are? I was wondering if they are strong enough to use on a fuse mounted elevator servos with removable stabs. Would make disassemble easier than taking the linkage apart at the firld.

Thanks for your thoughts, ML



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RE: Sullivan Aluminum QD Ball links strong enough? - 11/7/2010 5:26 PM   
Taildragger726



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Status: offline 		I don't think that is the intended purpose of a detachable ball link. Would it work? Probably,, Would I feel comfortable using them in that application?? Nope. This is just my humble opinion, if anyone has any experience using these on control surfaces please chime in.

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RE: Sullivan Aluminum QD Ball links strong enough? - 11/8/2010 9:38 PM   
ec121


 

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Status: offline 		I would think they would be great for that purpose. They have a positive engagement with the spring pressure to lock them on and take up any slack that would develop. I have seen people snap the ball links on and off the balls on a 40% without a thought to stretching the plastic of the outer part of the link.

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RE: Sullivan Aluminum QD Ball links strong enough? - 11/12/2010 3:21 AM   
Taildragger726



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Status: offline 		40% what?? Surely not a control surface of a 3D or aerobatic plane????

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RE: Sullivan Aluminum QD Ball links strong enough? - 11/12/2010 3:37 AM   
ml3456


 

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No. Just a 27%.
Looking for some thoughts right now if anyone has used these links for this. If you go to 40% like you do, I would have to buy a van and these would not be needed.

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RE: Sullivan Aluminum QD Ball links strong enough? - 11/12/2010 4:58 AM   
Taildragger726



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Status: offline 		My point is,, Ball links are great! But,on the control surfaces of larger (this is the giant scale aerobatic/3D forum) a ball link 'stands off' of the control horn that is mounted to the surface. Any significant torque will twist the control horn. Most large scale aerobatic/3D airplane are now using a large single threaded post and clevis for control horn or double truss control horn. With single servos available now producing over 600in/oz, care must be exercised in linkage set up.
Sullivan make great products, well thought out and engineered. The 4-40 Aluminum QD ball links may work well with 'smaller' giant scale detachable elevators. It will be interesting to see the results. Keep us posted.

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RE: Sullivan Aluminum QD Ball links strong enough? - 2/12/2011 4:12 PM   
icando3d2


 

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Status: offline 		well im interested in hearing some feedback because i have a 40% with one servo that stays in the fuse and the other in the stab, I am in need of something that would be detachable. has anyone used them?:

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