Your combined crew weight should be about 120-140 kg, if you're a skipper you should be a little lighter than your crew.
sail
No, you cannot put 27.5 wheels on a 29er bike as the wheel sizes are not compatible.
For a 29er bike, it is recommended to use a 16-gram CO2 cartridge for inflating the tires.
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A 29er is basically a MTB built around the same rim size as a 28"(622 mm) road bike - the common size for adult bikes.
Using 27.5 wheels on a 29er frame can provide benefits such as improved maneuverability, better acceleration, and a lower center of gravity for enhanced stability and control.
No a boat or sail license is not required if human or sail powered.
A bentinck sail is a triangular shaped main course with a single clew at the foot of the sail. The sheet is made down to the centreline of the vessel. Occasionally the sail would have a short foot spread with a short boom called a Bentinck boom but still with a single sheet. The the sail gave advantages in heavy weather, obviating the need to raise tacks and sheets when going about and enabling a good view of most of the vessel from aft when manoeuvring. NG
Wind!
The main differences between 29er and 700c wheels for bicycles are their size and intended use. 29er wheels are larger and better suited for off-road riding due to their ability to roll over obstacles more easily. 700c wheels are smaller and are typically used for road biking or commuting. For off-road riding, 29er wheels are generally considered better suited due to their larger size and improved traction.
no the resistansts on the sail make a rentical drift also the mentaro is to heavy
Using a 700c tire on a 29er mountain bike can provide advantages such as better rolling efficiency, smoother ride over rough terrain, and increased compatibility with road bike components.