Thread: Build Log Windrider's Boeing 737
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Old Jan 06, 2011, 11:20 PM
_Sergey_ is offline
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Ugly planes do not fly
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Joined Mar 2007
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Originally Posted by erh7771 View Post
I plan on using the Sickle rotors also, IMHO they sound the best at low RPMs for the money which helps get that turbine sound when taxing. I got 4pds out of one using 3700 kv motor on 5s but that is MAX for these things are week plastic. If there were some kind of fiber reinforced faster RPM would be a go but they're not.

The turbine sound also depends on the motor, IME the higher the cog the more you'll get that turbine whistle. There's a youtube vid of an A10 using haoye rotors and scorpion motor and you'd swear it was a turbine or he was creating that sound some how with a speaker. But it wasn't, it's the Scorpion motors at low RPM creating that turbine whistle.
You are right about the sound. There is one more thing that contribute huge amount to how fan sounds - dynamic balance of the EDF unit. You can actually choose the sound to some extent by strategically dis-balancing the unit. That is something I am going to experiment with when I get my motors and fans. I am more leaning toward cheap sickle fans from BP Hobbies vs. 2x expensive Skyworld's.
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