tweety777 wrote:
One of your props seems to be cavitating big deal.
...
Cavitation can be seen because of the bubbles behind the prop.
Not really. It's just because the props are only a few milimeters
underneath the water surface. As you can see in the pictures the ship is
propelled with two bell-shaped rotor motors. These are usually
slow-runners. With those it is absolutly impossible to get an
cavation-effect (unless of course the prop get's partially out of the
water - which may happen depending on waves - but that would result in
hyper-cavitation). Cavitation can appear at the propellers of RC racing-boats, where it lowers the speed of the boat. On the other hand hyper-cavitation is sometimes an appreciated effect (created by hydro-props that are only half-immersed) because it reduces the friction of the propeller.
That could destroy it in not all too much time.
Lord, no! That's a model-making-legend. Cavitation may cause destructive problems
with real-size propellers but not with the propellers of our little
ships. The bubbles and as a result the implosion-jet are just too small
to have any effect on the propeller's surface. It may cause a decrease
of effectiveness of propulsion but as far as propulsion ist concerned
cavatation is the most minor problem concerning a round ship without an
effective rudder.