I repeat one sentence of yours, also quoted in bold font type in context: "The fin often has ten percent or more of the displaced volume" In most...
There is nothing wrong with using 3M 5200 as a sealant to facilitate vacuum bagging. When cured it will also hold the bulkhead in place to...
Kite can not pull a boat closer than 90 degrees angle when extracting energy from the wind, neither can anything else interacting only with the...
What allows sail or kite or wing to extract the energy from the wind while sailing upwind is the fact that motion perpendicular to wind is...
No limits on time intervals. On sailing absolute speed records are on 500 meters course. No winch power allowed for propulsion, just for adjusting...
Undefined. Do you mean: 1) at what angle to the wind can your craft go on average 2) at what angle to the true wind can the string pull you on...
You are assuming that all the side force is created by the board, while in reality, some of it comes from the hull or hulls. In order to minimize...
No. Lower Cp => less wetted area when all cross sectional shapes are kept the same. And a higher maximum cross sectional area. Very high CP =>...
You are moving the goalposts. The implied question was: why does higher Cp equate to less resistance? It was not if there are cases when that...
But ignores one thing. Take a look at: 1) how resistance formulas are made for cars, submarines, etc, for equipment operating in a single fluid,...
If low speed is low enough, yes. But above 2 knots is definitely not enough. 0.5 knots probably is. In conditions where the latter foil is better,...
1) not so, because ground effect only reduces induced drag, which is a small fraction for an aircraft in cruise conditions. Wing used in WIGs are...
I don't think this: same amount of energy is used to transport 1 tonne (vehicle and passengers) 100 km would be correct. Overall efficiency...
Check the difference between a passenger and tonne. In former case, aircraft is superior, and in latter case, a large diplacement vessel with low...
In terms of fuel cost for passenger mile, all the mentioned marine vessels will lose against a proper sized aircraft with a wide margin, assuming...
