A nasty discovery made this evening-which may have a good outcome for the wee Tadpole down the track-the Cox yellow 6x3s are badly out of balance as moulded-I had vibration problems with two separate ones today-one on the 'Y-Bar' mentioned above and one on the Tadpole. Since I don't recall vibration previously being an issue with the wee thing when last run about 2 years ago, my nasty suspicious mind started thinking 'what's so different today?' ........and a check on the balancer revealed the problem. Not just a finger balancer-which is how I routinely balance them, but one of those good rolling wheel Dubro ones. The problem is mainly-but not totally-an out of balance hub, though one blade needed a bit of lightening as well. Fortunately I have a small supply of tungsten putty-which is ideal for balancing........

ChrisM
'ffkiwi'