Big Dog Fast Running Quadroped Robot

[MaxBrix]

This is the second Lego Big Dog. The object on this one is to achieve maximum running speed and stability with 4 legs. I would like to work up to a 4 leg model that can change gates from running to jumping and is steerable. The next step is steering without falling over on four legs.

 

[Bluehose]

Impressive !

[BusterHaus]

Nice work. What is the shock absorber used for on each leg? 

[TechnicRCRacer]

56 minutes ago, BusterHaus said:

Nice work. What is the shock absorber used for on each leg? 

Looks like the older medium stiffness regular shock absorber in red, like from the old RC Race Buggy set.

[Aleh]

Mate, you MUST add red eyes with lego LED lights!!!

[allanp]

Nice work. The structure of the legs kinda reminds me of a gazelle 

[MaxBrix]

8 hours ago, BusterHaus said:

Nice work. What is the shock absorber used for on each leg? 

I bought a box of misc springs so I can make my own shocks on axles. Springs about 4.6 mm to 8 mm Internal Diameter work . Like Technic Racer said 2 of the 8 springs on this walker are medium stiffness red lego shock from Ebay