Robart 615 Retracts
10-31-2012, 03:40 PM
#28
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RE: Robart 615 Retracts
ORIGINAL: Antoinebobrob
Hey guys, I need help. My retracts are loosing pressure whenever I test them at a high pressure. I don't know if this is a problem.
Hey guys, I need help. My retracts are loosing pressure whenever I test them at a high pressure. I don't know if this is a problem.
10-31-2012, 04:37 PM
#29
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RE: Robart 615 Retracts
ORIGINAL: da Rock
Up until now, there has been little criticism of the Wingspans' strength. However, they've established a strong history of retraction weakness and electrical problems.
Your actual use will tell the story if you've just recently purchased those units. Odds are they will hold up. Odds are unknown how they will work otherwise.
Did your installation instructions advise you to use a stronger battery than 4.8V? 6V? Did they advise you to use a larger capacity battery? Did they mention wiring your model so the Wingspans had their own dedicated battery? Any mention that you should not use heavy struts like Robarts? Or heavy wheels? Each one of those steps were required to ultimately get my 2nd set to work after they were upgraded a couple of times. They ultimately did work. Once.
I hope yours not only hold up, but work reliably and don't burn out. I might go to the effort of swapping out my Lado's for the 3rd or 4th time, to try my latest version of Wingspans if your's work more than a couple of sessions. So far, these forums haven't really had too many reports of successful use.
We await your report. When do you think you might be test flying? Honest, we really could use reliable 100degree/rotators. If the Wingspans have really had it's early problems solved, we all would benefit greatly.
ORIGINAL: Firepower R/C
The new Wingspan units do have a little play in the rotation mechanism, but the links are thicker than the Robarts, and they are straight (Robarts have a slight dog-leg in the links). Overall the contruction is beefier on the Winspan units. The trunion is also metal instead of plastic.
I will be trying them out soon in a Corsair ARF... I hope they hold up!
The new Wingspan units do have a little play in the rotation mechanism, but the links are thicker than the Robarts, and they are straight (Robarts have a slight dog-leg in the links). Overall the contruction is beefier on the Winspan units. The trunion is also metal instead of plastic.
I will be trying them out soon in a Corsair ARF... I hope they hold up!
Your actual use will tell the story if you've just recently purchased those units. Odds are they will hold up. Odds are unknown how they will work otherwise.
Did your installation instructions advise you to use a stronger battery than 4.8V? 6V? Did they advise you to use a larger capacity battery? Did they mention wiring your model so the Wingspans had their own dedicated battery? Any mention that you should not use heavy struts like Robarts? Or heavy wheels? Each one of those steps were required to ultimately get my 2nd set to work after they were upgraded a couple of times. They ultimately did work. Once.
I hope yours not only hold up, but work reliably and don't burn out. I might go to the effort of swapping out my Lado's for the 3rd or 4th time, to try my latest version of Wingspans if your's work more than a couple of sessions. So far, these forums haven't really had too many reports of successful use.
We await your report. When do you think you might be test flying? Honest, we really could use reliable 100degree/rotators. If the Wingspans have really had it's early problems solved, we all would benefit greatly.
11-12-2012, 04:04 AM
#30
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RE: Robart 615 Retracts
Hey guys, I really need some help in putting the robostruts on these retracts. I have never had a plane with retractable landing gear before. I am using the 350 robostrut on my top flite P40.60. Can somebody please show me how to do this or give me some tips? Thank you.
02-15-2013, 06:01 PM
#32
RE: Robart 615 Retracts
I have used this to fix small leaks in air cylinders. It rejuvenates the "O" rings inside the cylinder.
http://shopbvmjets.com/zencart/index...o51531obu0cd54
http://shopbvmjets.com/zencart/index...o51531obu0cd54
10-31-2014, 05:53 AM
#33
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Hey everyone, my retracts failed last weekend. The teeth mechanism of the retracts skipped a dent. This caused the plane to nose over. Damage is minimal but I can't be sure this won't happen again. Would shortening this metal rod help my situation? It will make the teeth jab into the dents more and make them more sturdy. However, Im not sure if the retracts will be able to fold and extend well if I do this. This is because the teeth will be more difficult to rotate. What do you guys think? 
10-31-2014, 10:04 AM
#34
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Hey everyone, my retracts failed last weekend. The teeth mechanism of the retracts skipped a dent. This caused the plane to nose over. Damage is minimal but I can't be sure this won't happen again. Would shortening this metal rod help my situation? It will make the teeth jab into the dents more and make them more sturdy. However, Im not sure if the retracts will be able to fold and extend well if I do this. This is because the teeth will be more difficult to rotate. What do you guys think?
10-31-2014, 10:17 AM
#35
Been there done that on the modification. Junk is Junk. Anything but a picture perfect touchdown on an asphalt runway will cause these things to collapse. Solved the problem with a pair of Sierra's and now another pair for my Hellcat. In my not so humble opinion they are the best there is.
10-31-2014, 10:28 AM
#36
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I tried that. It worked for awhile but the retracts got sloppy again. Steel gears will wear the aluminium eventually. The only luck I had with the 615's was in a .40 sized P-40. They did not hold up on my Top flite corsair. Sierras will solve your problem. It is the best solution(although costly) out there.
Dave
Dave
10-31-2014, 06:42 PM
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Thanks guys. I think shortening the spacer won't solve my problem... What do you guys think of the Robart 810RS pneumatic retracts? They seem more robust. Will they be a good match for a Top Flite P40 60 sized warhawk? They can handle up to 18 pounds. 8 more than the 615's. I also like the 100 degrees of rotation. Great for the V shaped wings of my P40. Sierras seem nice too but they look like they only rotate 95 degrees.
