My mast will extend, you want stroke length? How about twenty inches? How about 25 feet? This specialty bot is the SAM (Situational Awareness Mast), AKA the Zipper Mast Robot from Geosystems. It’s a small, traveling robotic platform with a vertically extendable camera to allow for optimal spying while maintaining a low profile.
The problem with trying to package 25 feet into a small robot was the folding (that’s what she said) but Geosystems devised a new way to make a big mast fit into a tight space (that’s what I said.)