DKTek
Veteran
Location: Melbourne, FL-USA
My Posts This: Topic Forum | | Quote |
| Why do you suppose your element crushed in your setup?
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| Quote |
| a bit more rotational mass than your set up
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The failures happen when the most torque was demanded, i.e. rapid decels, punch out...or close to it. Whenever the collective is close to max. The two stage, I assume, has a lot of torque available... maybe more than the element can handle with the added mass from using the longer tail blades. I ran out of the blue ones and now I'm on to the yellow ones that are the same as the blue. McMaster Auto is said to have a sturdier version but I haven't found the correct part number yet.
When the element crushes, it allows the couplers to misalign which throws the center shaft off to one side. The forward coupler actually touched the inner sidewall of the tail boom. That results in a slight rpm loss that makes the heli spin momentarily. I reduced power both times and I assume the shafts realigned as the spin stopped. Of course I came right in and landed...smoothly and gently, ready on the throttle hold if it happened again. A note on the spin rate, this is a big heli and slow. Although it catches you off guard, it's not as dramatic as losing the tail on a 3D machine.
The beatings will continue until morale improves... |
You might need a more powerful solution for that kind of high-end camera ship. Honestly I'm surprised the main gear survived that type of load so long without failure before that output shaft. Very interesting.
