telescopic actuators

[badboi]

Im looking for linear - telescopic actuators

Ideally, they would extend 3x length and be very durable

does anyone know of a manufacturer or supplier of these actuators?

thanks
dave

[Metal Slug 2]

Not axactly telescopic, but this linear servo may to the trick:

http://www.servocity.com/~servo/html/heavy_duty_linear_servo__25__l.html

[badboi]

thanks for the reply

im more looking for something like this

NASA's TeTWalker Robot Prototype

the actual strut has to be self-contained....
any other ideas?