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Other › Changed tail rotor motor and now all motors surging
02-11-2006 01:49 AM  12 years agoPost 1
miroker

rrNovice

Cape Canaveral, FL

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I have really had nothing but bad luck with this Blade CP since I purchased it. Had to send one back to factory for replacement already due to radio glitch. Got new one in return and there was no way it was test flown due to all servos, etc being out of adjustment, which I did not find out until it crashed on first flight. Can say they replaced the main gear and blades with just my sending an email though.

Once I got everything squared away, it started spinning in circles after about 20 flights. I read forums and found it may be caused by bad tail rotor motor, so changed it. Seems motor was the problem, but now the thing is surging. It will go up and down with no control inputs, and I can hear what must be the new tail motor speeding up and slowing down. I actually bought 2 of those motors and putting in second does not cure issue. I even went as far as to get new main motor with no success.

I am running the eflite 860mah LiPo, 8T or 9T motor with flat blades and all combinations do the same thing. I have even gone as far as to put the stock 10T motor back in with same results. Any help with this?

miroker
Fly till its broke, then fix it.

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02-11-2006 01:54 AM  12 years agoPost 2
slider46

rrProfessor

Ocala Florida

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If the tail motor is surging then you need to adjust the 4in1 unit the gain and proportion.. Your gyro is set to high.

Tom..... No "D" flying....

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02-11-2006 02:32 AM  12 years agoPost 3
miroker

rrNovice

Cape Canaveral, FL

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I have made adjustment to both POTS, going as far as turning the gain down to zero with no real effect. It still goes up and down and the tail motor speeds and slows no matter where in the range I put the gain.

miroker
Fly till its broke, then fix it.

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02-16-2006 01:07 AM  12 years agoPost 4
miroker

rrNovice

Cape Canaveral, FL

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Turns out a servo was binding and now I have replaced it. However, heli is now doing something different. It will not hold steady and acts like it is almost getting signal for either negative pitch which causes it to jump down towards ground or positive pitch, jumping up towards ceiling. It will move anywhere from 6 inches to 3 foot, with no pattern. Any ideas?

miroker
Fly till its broke, then fix it.

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02-16-2006 01:15 AM  12 years agoPost 5
slider46

rrProfessor

Ocala Florida

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Have you inspected the head for any damage after your crash? It might be a bent spindle, that holds the blade grips, or something is off in the blade pitch. How is the tracking? Are the flybar paddles level with the swash plate and table?
Check those items out and see if there is a problem with anyone of them.

Tom..... No "D" flying....

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02-16-2006 02:02 AM  12 years agoPost 6
cyclicpitcher

rrApprentice

Memphis TN

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same thing on mine
I am experiencing the same thing. First off I am flying a stock heli. I bought the upgrade kit and added the sym blades and the heat sinks. Running the stock motor with stock battery. had heli about two weeks no crashes.

While indoors in a garage I can bring to a hover with a newly charged battery and climb to about eye level out of ground effect. The heli is rock solid, hovering stable for about 2 minutes. Then, the surges start, the heli will suddenly lower it's power and start to decend, I have to add power to bring it back up but suddenly its like the power is restored and it starts to climb back up.

The rpm lowers then rises and I have to change the stick to respond to the changes to keep a close altitude in the hover.

I posted a message about comm drops or oil or something because I thought this surge effect my be caused by the motor binding up, maybe needing oil or something.

It's a great heli, great potential, I also fly a xcell gasser and a Raptor in a twin star body. This weekend hope to install a jet ranger body on the Blade, but the surge thing sux, hope to find the answer to this problem.

www.funscale.com

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02-16-2006 02:09 AM  12 years agoPost 7
miroker

rrNovice

Cape Canaveral, FL

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I have actually rebuilt the head, except for the rotor head, paddle control links and grips. It has the 3 bearing grips and I had to put in 3 shims, but that was prior to this issue and it flew fine then. I am wondering if it could be the 4in1 unit going bad.

miroker
Fly till its broke, then fix it.

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02-16-2006 02:15 AM  12 years agoPost 8
slider46

rrProfessor

Ocala Florida

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Unplug the motors and arm the 4in1, put the stick in the hover position 5/8 throttle and move the right stick around like you are hovering. This should tell you if your having a 4in1 problem, My guess would be your rotor speed is to low which means you have too much pitch to early in the throttle curve.

Tom..... No "D" flying....

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02-16-2006 03:27 AM  12 years agoPost 9
cyclicpitcher

rrApprentice

Memphis TN

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degraded performance
Well, I tried unconnecting the motors and rotating the right stick around seemed smooth enough, but when I hooked everything back up and re powered and wait for steady green light,I brought it into smooth hover then the surge turned into violent glitches. Instant drops in altitude like it is hopping in mid air. At one point the heli acted like it was completely unplugged from the battery, the motor sound cut out completely. My wife saw this and her comments were "thats why its so cheap, it's not durable"

I am really bummed out.

www.funscale.com

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02-16-2006 02:56 PM  12 years agoPost 10
c mark smith

rrApprentice

Mt Vernon, Indiana

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I would immediately agree with the wife and get a Shogun with separates, or a T Rex !

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02-16-2006 10:29 PM  12 years agoPost 11
slider46

rrProfessor

Ocala Florida

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C mark smith I don't know if you noticed but this is a blade cp forum.... They have a forum for Trex and shoguns to go talk about your great heli in. We are trying to sort out some of the problems guys are having with their Blade cp. Your imput is totally off base here .....................

Tom..... No "D" flying....

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02-16-2006 10:36 PM  12 years agoPost 12
c mark smith

rrApprentice

Mt Vernon, Indiana

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That was a joke or maybe you didn't see the humorous side of it.

BTW, I still have a Blade CP !

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02-16-2006 10:44 PM  12 years agoPost 13
slider46

rrProfessor

Ocala Florida

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Sorry, I didn't see the humor in your comment but I guess after rereading it again I can see how that could be a funny comment, sorry I jumped on you........
The next thing to try is remove the main rotor blades and tail rotor blades, Now power it up and see what it does with the motors running with no blades. Pay carfull attention to the swashplate movements and servo arms while under power...... You might have glitching caused by one of the motors you might have to run the motor 1 at a time to see which one it causing the glitches....

Tom..... No "D" flying....

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02-16-2006 10:47 PM  12 years agoPost 14
miroker

rrNovice

Cape Canaveral, FL

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Unplugged the motors as described and do not notice any issues while moving stick around. Seems problem only shows up while in the air. I can actually hear what sounds like the motor slowing down or speeding up sometimes. Motor has less than 20 flights on it, and if I put in brand new motor, it makes no difference. Heli will also move like it is getting input to go forward, back, left or right, with no pattern to movement. It just does it on its own.

miroker
Fly till its broke, then fix it.

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02-16-2006 11:30 PM  12 years agoPost 15
cyclicpitcher

rrApprentice

Memphis TN

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Hey Mark
That's the first thing I said to my wife! I should of got the TRex! She shot that down real quick. She may not know too much about helis but she sure seems to know how much they cost!

I oiled the main shaft bearings and the heli really cleaned up and got quiet and the glitching went away. I did get one short glitch when I flew too high in the garage and got close to a fluorescent light.

I think I am going to try a couple of things. one, to put ferrite beads on the servo wires and two use a thicker double sided foam tape to connect the 4N1 Controller to the frame. Maybe that might isolate vibration better.

One other thought ,maybe make some kind of faraday type shield for the 4N1. Like a thin foil cover.

Problem is all this stuff adds weight.

www.funscale.com

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02-17-2006 12:41 AM  12 years agoPost 16
phelps7896

rrNovice

Blue Springs, MO - Jackson

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Try swapping out the flat bottom blades for sym blades. If your go Li-Po you need the upgrade motor and with the upgrade motor and flat bottom blades it will want to drop nonstop. I crashed mine a few times before finding that out.

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