Ideas to be realized

This simple drawing shows what it should look like in the end, a streamlined fly boat hull on 2 hydrofoils. The foils can be steered and pushed down in a rowing stroke. The angle of attack of the propelling wing can…

The amount of energy running between the columns of the Oosterschelde storm surge barrier is enormous. Ever since the barrier exits I have been riding my rowingbike over it and impressed by the energy of the tides and the waves I have…

Take a peek on this video to see the principle. Who is going to build a record fairing that is very narrow and slim in the front?  Not me , been there, done that :-), Up til now the cylindrical or…

An ”old” design I made around 1990 (art- work Huibert Groenendijk). In the meantime- 26 years- some 2 wheeled skateboards have been made available but none af them as well functioning is this one is ( in my dreams :-) My…

You probably know it, those deep gutters in the roadway with upright, sometimes centimeters high edges where, when you want to turn out at a slight angle, your bike wheel gets caught and you can then fall. Super annoying and…