Blade 400 Stuffed Aileron Servo

I just tried my first flight (after a few back yard hovers) and on just starting to lift off the ground it lurched over forward and dumped the blades into the ground. Stuffed the tips on the blades and bent the feathering shaft.
Got home and replaced both, then did a quick check before next attempt to hover and noticed the swash was not level. Back to the table, disconnect the motor and this was what I found. As soon as any load was put on the servo (as in some pitch coming in) it jumped about 1/4 turn up pushing the back left of the swash up causing forward elevator and right aileron. Net result tilting it forward and into the grass.
NOT HAPPY JAN........

Category:

People & Blogs

Tags:

• blade
• 400
• helicopter
• electric
• eflite

[ZzStev3NzZ]

the gear in the servo is broken

[SeaComms]

In my comments / reply below I mentioned:

"Servo wasnt stripped, the pot wasnt secured properly and under load was moving and creating a new centre apparently."

There were no broken gears, just a poorly built servo unfortunately.

[SeaComms]

Hi everyone, thanks for the comments and tips. I contacted Model flight and on viewing this video they replaced the servo and all broken parts of the heli (blades, main shaft, feathering shaft).

Servo wasnt stripped, the pot wasnt secured properly and under load was moving and creating anew centre apparently.

Replaced all three cyclic servos with HS65hb's and a Hitec 5000 gyro and tail servo package.

[warmidgets]

Did you ever get new servos? My aileron servo (the exact one as yours) did the exact same thing... Get Hitec servos

[ZdenekJindra]

The pot axis moving is a good idea, my theory is a software problem in the servo's chip. I have found out about this design flaw of E-flite servos too. I first replaced DS75 with S75 which solved the problem, but later upgraded to Hitec HS-65MG, probably the best servos in existence fitting in this heli.

[bowmaaker]

YES THEY ARE CRAP- UNFORTUNATELY TAKES PEOPLE TOO MUCH TIME TO FIGURE out thats why they are crashing! toss those e-flite servos and get jr or hitec or futaba and save yourself a lot of greeeeeeeeeeeeeeeif!!!!

[CrazyHeliDude]

What kind of cam are you using? Good angle, good shooting. Keep up the good work! 5 stars

[leex70xeel]

annoying dog... hope you dont have to listen to that much...

[briansmobile1]

The servos and gyro on the blade 400 are exceedingly poor. Very glitchy- I thought the heli was hard to fly, but ground tests reveal poor electronics.

[ZzStev3NzZ]

if its a poor built servo then buy a new one a put it on

[nguyentuan1990]

what's wrong with that?