Versions‎ > ‎

005.1 "Alien"


Can we make a sailboat that is articulated and inflatable at the same time? Yes.
Can we make a prototype that is simple and modular to test different size, shapes and control on the same machine? Yes. 


Protei 5.1 sailing in front of Rotterdam Bridge

Protei 5.1 [Alien]

Protei 5.1 with Piem Wirtz by Rotterdam bridge

DSC_0279 Etienne Gernez and Henrik Rudstrom talking flexility of the boat "spine" DSC_0281 DSC_0295 DSC_0335 DSC_0341 DSC_0367 DSC_0355 DSC_0371 DSC_0376 DSC_0361 DSC_0379 DSC_0380 DSC_0381 DSC_0382 DSC_0385 DSC_0391 Protei 5.1, Rotterdam NL Piem Wirtz with Protei 5.1 on the roof of V2_ Rotterdam, NL Protei 5.1 [Alien] and Cesar Harada Detail front Protei 5.1 [Alien] Detail back Protei 5.1 [Alien]

Technical drawing


Size : 110 cm Long, Height 

Overall Weight : about ~2.5 kg

Weight Ballast / queel : ~1.5 kg

Materials : Plastic film from "space bag"

Surface sail : 

Depth in water

Price (approximate)

Time of fabrication

Control : Remote control (RC)

People : Cesar Harada, Sey Min
Thanks to : Piem Wirtz, Cesar Harada, Etienne Gernez, Henrik Rudstrom, Boris Debackere. 


Interesting model that allowed us to verify the possibility of having a boat that is both inflatable and articulated. Now it is not easy, the articulations needs to be very well executed else it creates too much friction for the servos motors to handle. Protei_005.1 did not really function because the servos were too weak and there was too much friction on the cables. The main point was to get familiar with these inflatable new prototyping materials.