I built a working Lego launch rollercoaster using Lego technics!

The launch system utilises 12 large power functions motors and achieves a theoretical launch speed of almost 10mph without load.

The system is geared up to a 1:5 ratio giving a maximum rpm of 1,950 at the drive sprocket. Gearing up in Lego technics is difficult due to the relatively low torque of the motors so any increase in speed is met with difficulty in moving any form of weight.

I built a custom rollercoaster vehicle with traditional running, side-friction and up-stop wheel layout.

The ride capacity is 20 Lego people per car.

The biggest challenge with this build was generating enough kinetic energy to climb a moderate hill in the track layout.

The track layout utilised over 1,200 5x3 Lego technic lift arm pieces creating a custom type of track compatible with the ride vehicle with central dropped supports.

I hope to do a second part of this video with a more comprehensive overall layout in the future.

00:12 Making the rollercoaster vehicle
00:58 Making the powertrain
03:17 The launch track
03:52 The launch puck
04:26 The track system
05:09 Some physics
06:07 Launch!

Please consider subscribing and liking as I grow my channel! Thanks and enjoy!

Any comments please leave below!