1
vote
1answer
288 views

When and why were pieces 3651 and 3652 discontinued?

Bricklink has piece 3651 as Axle and Pin Connector, while piece 3652 is Engine Piston Square 2x2. You could attach them to each other to form a piston. Service pack 5260, Connecting Rods and Stop ...
4
votes
1answer
261 views

How to build a car that stops at a certain distance?

I want to build a small car that is about 200 grams. I want it to run the following course and stop at exactly or about the the finish line. I can't use any controlling devices or electronics. I've ...
14
votes
2answers
2k views

Why does LEGO now use studless technic designs?

It seems to me that sometime between 1998 and 2006 (between the Mindstorms RCX and NXT), LEGO switched from using studded technic bricks (like this:) to studdless beams (like this): In my ...
10
votes
1answer
847 views

What are the angles used in angle connectors and liftarms?

LEGO makes Technic Angle Connectors, like these: (Here are names and part numbers). They also make angular liftarms, like these: (part 32348). That last part has an angle of 53.5 degrees. ...
20
votes
7answers
2k views

Why did Technic bricks have holes in the studs?

Lego Technic (/ Expert Builder) bricks have always had a very different design than the normal Lego brick, with peg holes lining the sides serving fairly obvious purposes, but they also have had (as ...
13
votes
1answer
995 views

Is there difference between different colors of LEGO axles?

There are a few different colors of LEGO Technic axles, but not enough to really use for artistic variation - black, grey, some beige, and recently I have started seeing blue. The particular color ...