A little Blade 400 advice needed...

[autorot]

Hey there folks,

I bought a Blade 400 about 4 months ago. Upgraded to all CNC aluminum head & tail assemblies, carbon fiber boom, blades and fins. Also added the spider gear landing gear kit to it. (Got sick of breaking the freaking chassis mounts if I even looked at them wrong)

My question here is rather simple though. I crashed not too long ago and repaired the damaged parts. Each time after I repair it, I like to spin it up to check tracking and cyclic pitch and such. No problem there either or so I thought. :confused:

Took it to my dad's place and was going to attempt to take off in his back yard. Throttled up and inched it up after the 50% mark to try a nice slow ascent. Well, the speed of the main blade jumped about another 1000 rpms, at least, and sent both tail blades shooting off like bullets.

Was this because my ESC took damage from the above mentioned crash and needs to be replaced now?

Thanks in advance, folks.

[mydartswinger]

One problem that can cause a sudden surge of power is a damaged battery. Check this especially if you flew without a canopy or your canopy was shattered during the crash. If your battery is crushed, pushed, or wrinkled, it could be a bad battery. I had a B400 do that to me once. I switched out the battery for a fresh pack and it worked well afterwards.

Also, check your pitch and throttle curves. Your normal curve should be linear (angled from the lower left corner of the screen to the upper right corner) from 0% to 100%. Use a pitch gauge to set your pitch curve per the manual. Either of these could cause a surge in headspeed as well.

If none of the above work, then your ESC or motor may be bad.

Also, make sure all of your blades are tightened in the grips to the proper tension. Check this by turning the heli on it's nose, rotating the blades to where they're parallel to the ground. If the blades fall without any bumping or movement of the heli, they are too loose. If they stay put, give the heli a short, light thrust downward. The blades should fall to about a 45° angle. Any less, they're too tight. Any more, they are too loose. Follow a similar method for the tail blades. This should prevent future blade slinging short of a crash.

Hope this helps.,
Shannon

[autorot]

Hi Shannon,

Thanks for the reply. Prior to this happening, I meticulously had checked the battery and blade grips as well as tracking. Everything appeared in order. I just bought another ESC and after installing the new tail blades, will be trying it again.

Great advice and the blade grip tension was nicely exemplified also.

Thanks much! :)