I built a working LEGO trimaran boat using LEGO Technic!

The boat has 3 hulls and 3 outboard motors. Each motor is made up of 2 large Power Functions motors and is controlled by LEGO infrared receivers.

I test different propellers to see which generates the most force for use on the boat.

Power to weight ratio is key for the boat to function. The large 9V LEGO battery boxes are heavy and are a challenge as the hulls only provide limited displacement.

I test the boat on a river in relatively calm conditions!

00:00 LEGO Trimaran
00:06 Building the outboard motors
01:01 3 complete motors
01:08 The trimaran hull
01:37 Testing the propellers
03:32 Hull and motor assembly
03:43 Launch!

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