Fury 55 Set Up Questions

[Morris9982]

I just assembled a Fury 55 fly bar kit and I have a couple questions. I did do a search first to see if I could find any relative previous posts and did not find any. If I missed them, please include a link in your response.

First, when I got home today after the first couple hovering flights I noticed some end play in the fly bar where the fly bar control arms (part 128-192) fit into the 3D bell mixer assembly (part 128-186) in the rotor head. The play is end to end, meaning the fly bar shifts length wise. There is about 1-2 mm of play. Is this normal or did I assemble something incorrectly? I see no way to get rid of the play other than making the two fly bar control bars (part 128-189) shorter.

Second, this is my first kit with a belt driven tail. I saw no guidance in the assembly instructions as to how much tension to have on the belt or how to set it, such as inserting the tail boom to a certain point. Any suggestions?

Third, during my hovering today (first time in the air), the model wagged the tail left and right slightly. The wagging did not seem to be associated with the gyro sensitivity as I changed that without any affect on the wagging. Any ideas?

Fourth, and lastly, the tail boom shifted on me today during the second flight. The boom rotated top to the left (as looking at the model from the rear) and went in slightly. I landed and put it back where it was. This kit holds the boom by tightening two clamps in the main frame. Perhaps I just did not have them tight enough and it moved after running for a few minutes. Is there a way to more positively lock the boom in place or should I just ensure the two clamps are really tight?

Thanks!

[dchekas]

1) Mine also has this play, I think it's normal.

2) Most people on this forum suggest running the belt really tight. I had one snap on me from running too loose I believe, so tighten it up real good.

3) Might be related to 4?

4) There's actually 4 bolts clamping the boom. The two upper bolts on the right side of the frame also act to secure the boom in addition to holding the boom clamps in place.

You should tighten the two that directly act as the clamps first, and then tighten the ones on the right side of the frame.

[Rob43]

If you're also breaking in a new engine, you may be experiencing some wag due to engine pulsations. My fresh engines have caused drifting versus wagging, but unsteady to some extent. Also, I recall with my Fury 55, the tail pitch control links were sort of distorted and stressed a good deal until the plastic had time to stress-relieve. Mine sat in the living room for quite some time during the build, and I noticed that the effort needed to actuate the tail pitch reduced with time. The tail needs to be super smooth and low effort to actuate the pitch, or a wag is almost unavoidable. It may be necessary to "size" the links a bit with a ball reamer made for this purpose. PM me if you need more detail. I found my Fury 55 tail was outstanding once it was broken-in a loosened up a touch. This really is probably the best built 50 nitro made. Super duper rugged. Oh, one last thing...I had a good bit of vibration in my heli if I ran below 1800 rpm. Smooths right out just above that. I could see the skids really dancing until I throttled up. It's inevitable if you're breaking in a new engine, but will be fine once your past that and can run 'er up to 2100 rpm or so.

Best wishes,