Summary

A set of retractable landing gear with shock absorbers made for a quadcopter project. The shocks have adjustable pre-loading and are quite strong. The bracket is designed to fit a 14mm tube, Turnigy Talon v2 compatible. I use the same brackets to mount battery cages, electronics, and just about everything else on my quad. See instructions for assembly and required materials.

update:

Uploaded the feet for the shock. just a simple post for now.

Instructions

See bottom of page for materials

the pictures should be in order of assembly

Asemble the shock
- Insert the #10-32 nut into the bottom of the shock
- Insert the sprint inside the shock
- Push the #10-32 bolt into the shock from the top and thread thought the nut. you can adjust the pre-load by tightening and loosening the bolt
- Thread the #6-32 bolt from the bottom of the shock to the top, secure with a small amount of epoxy
- Push the shock into the retract and tighten
Attach retract to the bracket
- Insert the nylon locking nuts to the bottom halve of the bracket
- Place the retract on top of the nuts and secure with 4 #6 sheet metal screws. (note, I added space for #4 nuts on the inside of the bracket so you can use #4 bolts if you want)
Mount bracket to quadcopter
- Use the #6-32 machine screw to clamp the bracket to the quadcopter tube

Done!

I use these electric retracts, they are inexpensive and work great.
hobbyking retracts

you will also need the following hardware for each landing gear:

4x #6 by .5" sheet metel screws
1x spring 1" long
1x #10-32 machine screw 3" long w/nut
1x #6-32 machine screw 3" long w/nut
2x #6-32 nylon lock nut
2x #6-32 machine screw .75" long

Retractable landing gear with shock absorber

update: