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Questions tagged [gearing]

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3 votes
1 answer
157 views

Bugatti Chiron built and everything worked - now pistons don’t move. What could cause this?

Built the Bugatti Chiron and initially everything worked. With the shifter in "drive" the wheels turned and the pistons moved, in neutral the wheels moved but the pistons didn’t. The reverse ...
3 votes
2 answers
2k views

How can I make my LEGO engine go faster

I have a LEGO engine powered by a PF XL motor but I didn't realize until now that the motor is not that fast and that even when I increase gear ratio the gears always get either unattached or jammed. ...
3 votes
1 answer
2k views

What does the +/- dial in the Lego Defender model do?

Lego today released a video showcasing the new 42110 Land Rover Defender model. The video captions mention that it has “Lego Technic’s most sophisticated gearbox to date”, and we see 3 seemingly ...
1 vote
1 answer
146 views

How do the 61927 actuators work in MK II crane set (42009)?

I don't own a 42009 set (MK II crane). But I have modelled it in LDCad in order to understand how the set works. There is something I don't understand related to the actuators - as I don't have two ...