← Measured performance versus Recipe Book predictions
2F 12 V
Do you have any results for the 4f machine. I would like to build a 3f machine using brake rotors from an audi A8 with the 50 by 50 ferrite magnets. It should work out very cost effective and if anything like the results for the 2f very efficient. Hope to hear from you soon, Kind Regards.
I have built a 4F here and plan to get it working soon now but I don’t suppose I will do performance testing on it. A couple of other people have built them I think. At least I have spent a lot of time answering their questions. On the face of it the perfomance should be similar to the 4.2N or 4200 but slightly lower output due to 10% smaller swept area. Alternator is similar performance to the neo one.
What is the maximum operating wind speed? At what wind speed does the wind turbine turn 90 deg to wind?
The furling system is not designed to impose a maximum operating windspeed. The turbine continues to operate. The furling system is designed to limit the average power output to a safe level. Often the actual output at any instant is quite variable. There are some delays inherent in the operation of the tail system and so it cannot provide perfectly constant power output. If the wind is turbulent and gusty then the output may surge quite high and the tail will move a lot. But there is no maximum windspeed. In most cases the turbine will continue to produce power in all winds.
I hope this helps.
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