This is a down wind facing windmill which was designed to ride through wind events without having a trip out mechanism. It delivers power through a verticle shaft to be used more convienently closer to the ground
Heres the full explanation on pdf. Here's the Flying Lizard in its service position. You can see the housing that holds the right angle drive, the sails, the caster and coupling the assembly rotates on. The driveshaft is inside the iron pipe going down to the load. This type of wind mill allows you to drive as large a generator, compressor or pump without having to hoist it up in the air.