Design Requirements

• Freely rotating 360 degrees
• Tailwing actuated with at least +-45 degrees range of motion
• Can withstand tortional and bending loads from wind and water
• Center of mass along rotational axis
• Center of lift along rotational axis (is this right Alex?)
• Center of drag behind rotataional axis (is this right Alex?)
• Provides mounting locations for sensors/ counterweight off of the front of the wingsail
• Provides for wiring travelling from sensors and servos into the boat

Constraints

• As light as possible
• Uses existing 1” bearings to attach to hull substructure

Considerations

• Need a full order of operations for manufacturing/integration
• Tailwing actuation needs a full redesign, range of motion is far too low right now
• Is wood the best material for the spars? Could be kind of heavy. I saw that RC test flight used carbon rods on a similarly sized boat. Also, what is the necessity for the square metal extrusions going parallel to the mast? are they for withstanding bending loads?
• Probably need to do some static/FEA analysis on how the wingsail will handle loads
• Fiberglassing - best way to do it?
• Need to provide for mounting sensors/counterweights on the front spar
• Is the mast we have right now long enough? I think I remember that it was not. If so, do we need a longer mast or is it okay for the mast to go only partially up? Also, the mast we have right now I believe is not the right diameter for the bearings, so we need to remember to turn it down on lathe if we end up using it