macd
Well-Known Member
You have simplified that a bit. The vane needs to turn the oar
Vane size on my Aeries is important as is stiffness & design of the vane. I have several including a couple with additional wind collecting units mounted on them to increase light wind running performance
To demonstrate the point the aeries has a facility to tilt the vane thus reducing its effectiveness in high winds to prevent oversteer
Of course i can only speak for the aeries ( and a homemade one made many years ago)
Compared to the hogwash which prompted my post, I don't think I've simplified it at all. The effort needed to turn the oar is minimal. You can do it effortless with a little finger.
Most manufacturers offer only one size of air vane; Cape Horn supplies two, one made of cloth on a lightweight frame for light winds. Whatever its size, the weight of the vane is critical for optimal performance.
Canting the vane in high winds is a common feature of servo systems: as you'll be aware it reduces the wind effort on the vane (another reason why one vane largely suits all conditions).