8421 Mobile Crane Lego Technic Everything Power Function
8421 Mobile Crane Lego Technic
Video Rating: 3 / 5
This is one really cool Lego toy, watch how many moving parts there are on this awesome remote control Lego Crane. Really very cool.
Fast Gas Remote Control Cars.com
Enjoy the Hobby of RC’ing 
first off awesome job!
but… the boom doesn’t rotate, and I wonder if you could get all eight wheels to turn and put the pwer and differential on atleast 2 wheels?
Did all of the electric stuff besides the lights come with this???
Is this hard to build?
That Spider gear is awesome
Can you send me the instructions please on how to make 8421 remote control, if you will then I will send you my email in your youtube inbox
The only thing left is to motorise the turning of the arm…
Mean!!! Open diff looks so sweet.
very nice!
I’m not sure if you’ve seen my video… but mine’s similar except I couldn’t put the boom on after Adding my power functions… I should’ve put in more time! A couple of your motor placements look similar to mine =)
The instructions are very detailed and easy to follow. Don’t worry, it’s made that maybe not a child, but an older teen can make it.
sorry i’m so noob, but, for me that i don’t now hot to asemble it, is it easy to put fully automatic? and what about the remote control, is easy to install?
thanks
I would NOT put that on the table, lol
Nice work
That pretty nice