This is a current (2017) Technic set based on the BMW GS1200 motorcycle. Continue reading
I’ve reached the comfortable stage in my parts collection where I usually seem to have the parts I need if I’m free building. This confidence recently enabled me to pick up this “most pieces are included” Technic articulated mine hauler.
The new RC Tracked Racer is currently the only way to obtain the Lego infrared (IR) transmitter/reciever remote control in shops. I picked it up yesterday as it’s been released long enough to be discounted.
It’s quite a nice design, the battery box is mounted low and centrally. Each track is driven by it’s own medium motor, one mounted forward and the other rearward. The car body flips forwards to allow good access to the battery box switch.
I was lucky enough to receive the 8293 Power Functions as a gift from my family for a recent birthday. I haven’t had time to put it to work as I had a backlog of second hand Lego to wash, sort and catalogue. I finally got up to date with that today, and I thought a good first build to motorise would be Jason Allemann’s Six Legged Walker Frame MOC.
This is the B build from 9391 Mini-Crane. The stickers you can see are not correct, they are from another set.
This is set 8066 Off-Roader, purchased as a set off eBay. It’s a small (143 parts) Technic set.
As I built it, I was concerned the steering would have a large hysteresis as the fit between the two pins that transfer the rotation to the steering have a large clearance. In practice this is not an issue, it’s a particularly nice steerer.
You’d expect an “Off Roader” to have a long travel suspension, which this does. The vehicle has a pivot point near it’s centre of gravity and the front and back swingarms and chassis all meet here. The suspension is a mono spring/shock absorber across this pivot point. This is a common approach in real vehicles, but in this design, the axles are not floating so the Off Roader has great bouncy suspension front to back, but is solid side to side.
One nice Technic design aspect is the universal joint in the steering linkage. The steering is controlled from a gear at the back, so the linkage needs to transfer the rotation across the pivot point. This is accomplished by adding a universal joint at the pivot point – a common engineering solution to similar real world problems. In the picture here I’ve added a green line to show the axis of rotation the suspension is moving around and removed the left seat to expose the universal joint.