simple wind turbines safety mechanism?

I am looking to build something like below:
http://velacreations.com/howto/chispito/

I don't want to make my own motor as in some of the more complex guides.  I like the approach in the link I posted, as it's something I can make very quickly with little tools / skills.  But what I don't see on any simpler guides is the building of a safety mechanism.  This is important as I live in an area that is susceptible to regular storms / very high winds and need a way to automatically turn the blades away from the wind when the wind is too strong.  Does anyone know any simple guides that include this feature?

I know this might sound like a stupid question, but would the treadmill motor only go so fast so that might be your safety mechanism?

I'm not sure of a simple solution, but here are some ideas.

I wonder if a simple clutch could be built into the hub, allowing slippage if there is too much torque.

The antique wind pumping windmill at my old property had a long wire attached to a mechanism in the head, allowing the blades to be fanned out to catch the wind, or pulled in so that they would act as a rudder, turning the head so the counterweight faced the wind.

The big modern windmills have both an automatic hydraulic clutch to disengage from the generator system, and blades that can be rotated on their axis to catch or spill the wind. This is the same principle as the propellers on turboprop aircraft, whose pitch can be changed to increase or decrease the amount of air they "grab" from the fixed speed engine.

I feel that Douglas has answered your question.

While I was looking for an answer I found this thread on Wind Brake:

https://permies.com/t/35307/wind-brake

Anne Miller wrote:I know this might sound like a stupid question, but would the treadmill motor only go so fast so that might be your safety mechanism?

A high wind situation can simply over power the motor thus producing to much power and the whole can go up in flames.  Most places something burning in high wind conditions can be a major fire hazard.

More likely, the excess torque would cause what rocket engineers call Rapid Unscheduled Disassembly (RUD). Meaning, random bits and pieces, rattling around inside the motor housing, or possibly strewn about hither and yon.

Many of the old windmills had a simple fly weight governor with a latch on it and a hinged spring loaded tail.  When the govenor got to too high a speed the latch was tripped and the spring folded tail folded 90 degrees and turning the windmill out of the wind until the latch was manually reset.  If I were going to build one I would try building a flyweight with an adjustable spring loaded latch holding it.  Speed gets to high and the latch trips.  It hits and trips a latch holding the tail straight letting it fold under spring pressure.

Now on a VAWT I read about they were just using a brake rotor out of a car and the govenor tripped a latch and clamped brakes down on the rotor braking it to a stop and locking it till released.

The simple control is the tail being hinged to fold parallel to the blades.   I think it could be made automatic I think it could be made automatic by having the generator mounted off center to the tail and hinged so that the unequal pressure would bend it to the side and a spring holding it straight.  As wind reaches the threshold of the spring it will spill wind.

@ C. Letellier:

Yes! That makes sense. Some sort of wind pressure failsafe that kicks the windmill into a safe mode.

I'm still trying to think of a system that would work for a micro-turbine, as described by the OP. My speculations:

1. A breakaway point drilled/notched into the vanes themselves, so they snap off readily to preserve the generator. It doesn't seem that creating and installing spare vanes would be a large problem. The hub would have to be built to withstand the asymetrical forces though.

2. A thoughtful neighbour, well motivated with magnificent organic tomatoes and eggs, who would haul ass over in the face of an impending blow and crank down the whole assembly from its tower.

Actually, I like #2.

Hans Quistorff wrote:The simple control is the tail being hinged to fold parallel to the blades.   I think it could be made automatic I think it could be made automatic by having the generator mounted off center to the tail and hinged so that the unequal pressure would bend it to the side and a spring holding it straight.  As wind reaches the threshold of the spring it will spill wind.

I think this makes sense. But will the turbine blades be able to withstand the force of the wind, from the side or behind?the OP's design, they are fixed in place. Still, I think this could be made to work. Good idea.