This picture shows a drag surface run test
for a early forerunner of CSSX with 12 m long
and 35 t displacement. Model in sclae 1 : 10,5
As you can see the bow wave climbed just over
the deck at a speed equal to 6,5 to 7 knots.
If you go for higher speed on the surface
with this model - the drag increase dramatical
and the sub start to dive dynamic with empty softtanks..
For the test you need :
- a friend
- a timer clock
- a spring scale
- a piece of wood
- a ponton with metrics marks
- a fiendly day whithout to much waves
- a nice lake
- a precalculation of the model scale and speed
so you can make the model in a maximum scale
depents on the maximum speed you friend can run
over say about 33-66 feet at a constant speed.
and of course a scale model which is able
to trim at the right waterline.
If you want to test higher speeds - you need
a motorboot to run and a
GPS system for speed control..
Carsten