Can I use the plastic from a “Tupperware” container for rotor hub/blade hinging material?
You probably could, however we don`t believe it is as good as Polypropylene and therefore it may be subject to premature failure. In otherwords, it may fail/crack/split, etc., after being subject to the high frequency of blade flexing. Many different non-Polypro`plastic hinges have been used sucessfully, however experience tells us to watch carefully for the initial signs of hinge failure. Is there an advantage to mounting more blades, such as four, versus just two? Wind tunnel testing conducted in early 2000 indicate that three blades lift better than two, four blades lift slightly better than three. And the relative RPM between three and four is about the same. So, if you feel you have adequate power (1:1) it would be to your advantage to use 4 blades, however with a potential power problem, it would be best to go with 3 blades to reduce rotor drag slightly. The rotation rate of the 4 blader will be slower than the two blade rotor. In heli`s and prop`s, you add blades to absorb great
