Boom slipping

[Chris Currie]

Hi,

I recently crashed my 450x, when I picked it up there was no tension on the drive belt. I replaced this and a few other components but the tail drive is still going slack. Is there a pin or something to hold the boom at the right point, or is it purely friction between the frame halves and using boom supports? Hard to tell from the exploded parts drawing if I'm missing something.

At the moment I've stuck a bit of tape between the servo support and frame to stop it sliding but would like a more permanent solution.

Any help is appreciated.

Chris

[tomatwalden]

It's just a friction fit. You can either pin the boom (ie screw it through the frames into the metal), or a simpler solution is to take the boom out ... wrap one layer of sellotape around the bit that grips and re-fit. The extra diameter provided by the tape should enable it to grip more effectively.

[tomatwalden]

PS. I wouldn't go with the pinning the boom. You want to be able to adjust belt tension as over time (and with temp differences) the tension will change and you need to be able to adjust it.

Tape inside should do the trick!

[jimmyhorns]

PS. I wouldn't go with the pinning the boom. You want to be able to adjust belt tension as over time (and with temp differences) the tension will change and you need to be able to adjust it.

Tape inside should do the trick!

Roughing it up helped me with a 450 than tape. Some nice coarse 60 grit sandpaper worked wonders - just on the bit where it is clamped.

[BASS 666]

what about an alloy boom clamp ?

[horneteer]

Resist the temptation to tighten the frame clamp screws! Easiest/least destructive way is to use a cut-down servo bracket or boom clamp, right up against the frame. Preferably a plastic one. Also be sure not to over-tighten the belt. You should be able to push the belt about half way across the boom.

[Chris Currie]

Thanks for the help guys, much appreciated.