RunRyder RC
 4  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1289 views POST REPLY
Helicopter
e-
Blade
Blade 300 › 7200bx / 300 ISSUE
04-07-2015 01:02 PM  35 months agoPost 1
fla heli boy

rrKey Veteran

cape coral, florida

My Posts: All  Forum  Topic

OK - hopefully somebody has an idea.
My brother brought his 300 on vacation at my place with an odd problem. When it gets light on it's skids, it gets a sudden HARD right cyclic input...that stays there until throttle is lowered.
The servos have all been swapped to KST's, swapped back to e-flite and back again to KST servos.
We even swapped out the BX with another one I had laying around and when it still did the same thing, I copied my 300 model into a blank spot to create a new model... and bound it to my transmitter.... same exact issue.
We've tried different mounting materials as well.
As a side note, it's been flying fine for over a year.
Any ideas where we can go next???
Thanks guys...

PM  EMAIL  GALLERY  Attn:RR  Quote
04-07-2015 01:24 PM  35 months agoPost 2
DemetriusUSN

rrVeteran

Virginia Beach, Va USA

My Posts: All  Forum  Topic

I would do a hard reset of the 7200bx, clear the model and start from scratch. Making sure all the dials are in the center spot, check and re-check.

Minicopter Triabolo 700,Diabolo 800,Minicopter 550,Compass 6hvu, Devil 380

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-07-2015 01:58 PM  35 months agoPost 3
fla heli boy

rrKey Veteran

cape coral, florida

My Posts: All  Forum  Topic

yep, did that. With BOTH BX's..... and in 2 different TX's.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-07-2015 02:05 PM  35 months agoPost 4
DemetriusUSN

rrVeteran

Virginia Beach, Va USA

My Posts: All  Forum  Topic

Maybe the unit is defective, maybe??

Minicopter Triabolo 700,Diabolo 800,Minicopter 550,Compass 6hvu, Devil 380

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-07-2015 02:52 PM  35 months agoPost 5
BJames111

rrElite Veteran

San Diego, California

My Posts: All  Forum  Topic

Has it been crashed and repaired? Most of the time this is seen, it is because of high frequency vibration.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-07-2015 02:55 PM  35 months agoPost 6
PilotPin

rrApprentice

Indiana -- USA

My Posts: All  Forum  Topic

Sounds like a vibration problem. If it hasn't been crashed I would first replace the head dampeners. They don't hold up good on the 300.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-07-2015 03:27 PM  35 months agoPost 7
fla heli boy

rrKey Veteran

cape coral, florida

My Posts: All  Forum  Topic

I figured it HAD to be vibration caused. It was flying fine, he had a minor mishap and replaced the usual stuff just to be thorough and it's been acting this way ever since.
2 different BX's, two different transmitters and 2 different sets of servos.
I found a crack in the frames, which we repaired, but we're now wondering if some other part of the frame is cracked down in the bowels that we can't see without a total tear-down..... which he will probably do when he gets home to his own shop.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-07-2015 05:14 PM  35 months agoPost 8
DemetriusUSN

rrVeteran

Virginia Beach, Va USA

My Posts: All  Forum  Topic

I was off, sorry.

Minicopter Triabolo 700,Diabolo 800,Minicopter 550,Compass 6hvu, Devil 380

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-07-2015 07:01 PM  35 months agoPost 9
BJames111

rrElite Veteran

San Diego, California

My Posts: All  Forum  Topic

I figured it HAD to be vibration caused. It was flying fine, he had a minor mishap and replaced the usual stuff just to be thorough and it's been acting this way ever since.
2 different BX's, two different transmitters and 2 different sets of servos.
I found a crack in the frames, which we repaired, but we're now wondering if some other part of the frame is cracked down in the bowels that we can't see without a total tear-down..... which he will probably do when he gets home to his own shop.
Things to check are obviously all shafts, including the motor shaft which can be bent in a crash. It doesn't have to be out much to cause a vibration.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
04-07-2015 09:19 PM  35 months agoPost 10
fla heli boy

rrKey Veteran

cape coral, florida

My Posts: All  Forum  Topic

I'M hooking him up with better dampeners and he's going to get new frames and install all new shafts again and check the motor.
See what happens.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-10-2015 06:14 PM  34 months agoPost 11
icanfly

rrElite Veteran

ontario

My Posts: All  Forum  Topic

simple solution to a simple problem, you see when the heli want's to lean over a little while compensating for the tail hold the gyro its reacting a little too much. You can lower the feedback response and or lower the gain a little to compensate, and this will happen with any gyro if the gain is high and dampening is very low or off. You'll have to lower the cp settings until you are happy, it isn't hard to resolve. You may have the gyro setting in the tx too high and the bx is good to go, check the tx first.

fhb, I sent you extra dampers right? you still have a spare pair?

PM  EMAIL  GALLERY  Attn:RR  Quote
04-11-2015 01:06 PM  34 months agoPost 12
fla heli boy

rrKey Veteran

cape coral, florida

My Posts: All  Forum  Topic

We replaced dampeners, no joy.
Remember, he's been flying this for a year with no issues.
We've used 2 different BX's in it and hooked it to 2 different TX's. Used 2 different sets of servos.....
He's headed back home to Michigan now, so he's on his own...
He's going to do a total tear down and rebuild. I think it's a bearing issue. His grip bearings I noticed the last day, were pretty notchy. So I'm thinking he may have a shady bearing causing some high speed vibes.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-11-2015 07:11 PM  34 months agoPost 13
PilotPin

rrApprentice

Indiana -- USA

My Posts: All  Forum  Topic

The motor bearing on the shaft end is known to have problems.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-11-2015 08:14 PM  34 months agoPost 14
fla heli boy

rrKey Veteran

cape coral, florida

My Posts: All  Forum  Topic

I'll let him know.....

PM  EMAIL  GALLERY  Attn:RR  Quote
04-12-2015 01:34 AM  34 months agoPost 15
icanfly

rrElite Veteran

ontario

My Posts: All  Forum  Topic

have you got a ground wire to and from the tail case and negative battery lead?

I can't tell you how twitchy and buggery my 300 became this year twitching about a minute into every flight, silicone lube on tail belt didn't work, a servo cap not, until I researched some info on hf about a certain 3x gyro in question. The articles said static to the gyro was causing strange things at any time. I went to my 300 ran a ground wire from the tail case directly to the negative battery connector, problem solved 100%, wished I'd known to do this many moons ago , would have saved me many irritating small crashes. You might try it if you haven't already.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-12-2015 02:58 PM  34 months agoPost 16
fla heli boy

rrKey Veteran

cape coral, florida

My Posts: All  Forum  Topic

if I tell him that, he'll just dump it....
I tried to get him to take one of my 550 DFC's home with him, but he had no room left in his SUV....

PM  EMAIL  GALLERY  Attn:RR  Quote
05-28-2015 05:15 AM  33 months agoPost 17
drdot

rrElite Veteran

So. California, Orange County.

My Posts: All  Forum  Topic

Fwiw..

almost certainly vibration related..These fly best when rail and mains are dynamically balanced...spin me up in your hand, use clear tape to minimize vibes....

PM  EMAIL  Attn:RR  Quote
06-24-2015 03:02 PM  32 months agoPost 18
Richardmid1

rrProfessor

Leeds, England

My Posts: All  Forum  Topic

Make sure new main, tail and feathering spindle shafts are replaced aswell as main shaft bearings and check the head block itself isn't bent. Then you'll want to balance the blades properly (if you don't know how, google will help). If it is still trying to tip on take off it will be the gyro tape that's too soft or not stuck down properly. Don't use the stock thick white pad, you need a thin pad.

60% of the time, it works every time!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
06-24-2015 07:09 PM  32 months agoPost 19
fla heli boy

rrKey Veteran

cape coral, florida

My Posts: All  Forum  Topic

he did ALL of that. He's going to send the 7200BX back to horizon.
Makes no sense as we fitted a NEW 7200 in it and it still acted the same.

PM  EMAIL  GALLERY  Attn:RR  Quote
06-24-2015 07:25 PM  32 months agoPost 20
Richardmid1

rrProfessor

Leeds, England

My Posts: All  Forum  Topic

Sounds silly but did he double check the gyro sensing direction?

60% of the time, it works every time!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1289 views POST REPLY
Helicopter
e-
Blade
Blade 300 › 7200bx / 300 ISSUE
 Print TOPIC  Make Suggestion 

 4  Topic Subscribe

Thursday, February 22 - 7:05 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online