Re: typical servo speeds

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@...> wrote:

That is encouraging Jon.

> A real hummingbird, I believe, flaps its wings at about 600 Hz
> (or am I thinking about a bumblebee?)


A Bumblebee (I'm currently analyzing microCTscans of a honeybee) flaps
at around 200hz, a humming bird depending on the species is in the
15-30hz range though I'd have to look it up to be sure. I'm looking
at building something inspired by an insects flight apparatus but more
on the size scale of a humming bird. This rig is to allow PIV and
such analysis in air (other rigs have been scaled up and done in oil).
Its a tall order as the wings describe a figure of 8 and they have
controllable stroke reversal for control all at 20hz, the reversals of
course are at 40hz!

Small flies can go right up to 1000hz

All of the insects are resonant mechanisms meaning that the inertia is
accounted for with elastic storage, the muscles need only do useful
work and overcome losses. They can even tweak the resonance by
stiffening the thorax, its neat stuff.

Graham