R. I. Nelson wrote:

> do You have any other energy sources available to use? compressed air for
> example.

Not really available. I've thought about hydraulics or pneumatics, but I'd
need to generate the pressure. May be viable; I don't know how much this
would add to the overall cost and system complexity. Has anybody any good
pointers to pumps (and cylinders, and ...) for such an application? I tend
more towards hydraulics; seems smaller, quieter and easier to deal with.


Richard Prosser wrote:

> Do You need this amount of speed (30 degrees 100ms) in both directions?

Yes, from a center position in both directions. 

> You could use a motor or rachet drive to pull against a spring to cock
> the system and a small solenoid to release it.

Something like that could work. It would buy me approx. a ratio of 1:4 (it
needs to be ready to fire again after 500 ms). I'd like to avoid that
though and be able to fire as quickly as somebody can push a button. And
I'm shying a bit away from the mechanical complexity ... :)

What's a "rachet drive"?

Thanks,
Gerhard
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