On Wednesday, May 2, 2018 at 3:32:35 PM UTC-4, Paolo Guardigli wrote:
Hello everybody,
we in my Club(Pavullo in Italy) are suffering(2 times) a very strange vibration of the duodiscus for a minute or so after the glider is released from the rope,after one minute the vibration is finishing.
We are trying to investigate why it happened but we are not able to find out the reason.
Does someone already experienced the same problem?

Thanks a lot to everybody

Paolo Guardigli

Hello Paolo - can you be a bit more specific about that vibration? What is the estimated frequency of that vibration - low, high?
What is vibrating? The wings, the tail-boom or ??
Uli
'AS'