Stet
Elite Veteran
Location: Long Beach CA
| You were applying a heavy load and a lot of power while the heli was on the ground, similar to using a "run up stand". This situation captures all the vibration and a resonance can build up. I recommend landing, hitting throttle hold then bringing the stick down and shutting off idle up.
So what I am saying is that it is possible that nothing is fundamentally wrong with the heli, rather it just started to shake violently due to the fact that the vibration had nowhere to go. You might say, gee I do this with my 60 all the time, but in the case of run up stands where you are basically doing it the same way but with the forces reversed, it can be done many times before the one time it goes unstable and blows up. We had a guy put his Freya on a run up stand, and the resulting shake actually bent his main shaft. These guys like to walk under the stand and adjust the needles for temp optimization. With a 30 you might get away with it more, but gosh this is a really dangerous thing to do, especially without a major helmet on your nogen.
In your case, if the blade grips weren't real tight, it might have gone into an unbalance more easily. Bottom line, IMHO, once on or close to the ground hit throttle hold or switch idle up off before bringing the stick down. |
There's cheaper ways to dig a hole 
