Can anyone suggest a reason for my heli starting a fast shake after about a minute of hovering I still have traing gear on it ?

The traning gear picks up a small vibration and ampliflies the vibe into a fairly violent shake... I've seen this happen many times...

bT

my caliber 30 does this and i have a solution tape the balls to the struts and add 5 grammes car wheel weights to each ball then it stops

I had a problem with my old shuttle and it's training gear. I was told by an experienced heli pilot from a model shop to shorten the legs. Not all, but one corner and the other one that is diagnally opposite to it.

And it worked!

I just snipped about 1-2 cm off either one and popped tha balls back on and the problem was solved. It's worth a try!

James