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Warp 360 Compass Warp 360 Model Helicopter Discussion |
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03-22-2013, 04:14 PM | #81 (permalink) |
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Join Date: Aug 2012
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The tail pulley..........
I've been trying to eliminate vibes for ages (continually fracturing booms) - fitted new brass bush, new tail hub, balanced tail rotor assembly with kbdd blades, then did some bench testing - with little improvement. I decided to blow the dust off the warp today to check over the tail assembly and found my kit has a dodgy tail pulley! Don't have a dial gauge handy, but looks to have about 1 mm of wobble when manually driving the tail by hand. Plan to change this out with the tail shaft bearings as this has to be the source of the vibe issues now that my not-so-wobbly motor can is loctited in place. Hopefully test this soon and report back.
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03-22-2013, 07:01 PM | #82 (permalink) |
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Join Date: Dec 2011
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I've yet to find one of those that doesn't wobble.
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03-23-2013, 02:07 AM | #83 (permalink) | |
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Join Date: Nov 2011
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Quote:
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03-23-2013, 06:25 AM | #84 (permalink) | |
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Join Date: Dec 2012
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Quote:
The shim I used between the rocker and it's mount in the photo is actually an aluminum gromet used on some servo mounts. The hole in the metal gromet matches the rocker mounting screw at M2,5 and flange side of the gromet matches the diameter of the rocker mount itself. I had this metal gromet in my spares bag from a ship long gone and it was just luck it fit perfectly. You wouldn't have to move the rocker cup that far away from the ball to get the result your looking for. Anything you can find for a shim or washer will work. Make sure what ever washer or shim you use that it has a small outside diameter and that it will only contact the inner race of the rocker bearing when you tighten the screw or you'll end up binding the bearing and won't have free travel. Whatever you use as a shim will determine the screw grip length. The metal gromet I used called for a M2,5X16 screw to be used to get full thread engagement in the rocker mount. Goblin 700 has many M2,5 diameter screws so I just ordered some M2,5X18 screws and cut them to length. Side bennefit from installing that shim, it also provides better clearance between the control rod side of the rocker and tail boom so you won't scratch the bottom of the boom with the threaded end of the ball link screw sticking out of the rocker. Viking |
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04-06-2013, 06:10 AM | #85 (permalink) |
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Join Date: Nov 2011
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Just to let you guys know, I changed some parts, well actually the entire tail from boom towards the back and the tails holds just GREAT. Still a wobble sometimes due to the headgain, but atleast now I can start finetuning it without the worries of the tail.
Plus i'm getting insane flighttimes, 1200mah gens ace batteries, some normal hovering and flight and after 4 minutes I still got 22 volts left according to the telemetry? |
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