Vibration, Blades Off?

[helidan_wales]

Spooling up on the bench with mains and tails removed what would you consider acceptable levels of vibration (electric heli)?

Obviously no heli is going to be 100% vibe free when tested like that but how much vibration would there have to be before you would be concerned?

[helijohn]

Spooling up on the bench with mains and tails removed what would you consider acceptable levels of vibration (electric heli)?

Obviously no heli is going to be 100% vibe free when tested like that but how much vibration would there have to be before you would be concerned?

Actually, 99.9% free of vibrations.