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I purchased one gyroscope HST 33115 remote controlled mini helicopter (sky rescue). The lower propeller is rotating but the upper propeller is not rotating . what can be the problem i need help to fix it

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Posted on Jan 02, 2017

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SOURCE: Where can I get copy of instructons - Air SBEGO Mini IR Helicoper

have you made sure that the helicopter is charged completely?

if so when you try to take off if it spins to the left then hit the r trim on the remote and if it spins to the right then hit the l trim on the controller.

honestly all the instructions do is tell you how to put batteries in the controller.

Posted on Dec 30, 2008

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SOURCE: heli max hicro helicopter just keeps spinning in circles

Make sure you used the right blades, the top and bottom blades are different parts and if you try to replace an upper blade with a lower blade it will mess up the flight. The two sets of blades are reversed, the leading edge is on the opposite side because they spin in opposite directions.

If you are sure you have the correct blades, try to eliminate vibrations, especially in the upper rotor. Vibrations can throw off the gyro sensor and cause the helicopter to spin. If it isn't vibrating then you need to adjust the trim. If it is just a slight spin, you can try using the horizontal trim adjustment on the left stick. If this is not able to correct the spin, set the horizontal trim on the left stick to center and then remove the plastic canopy. On the circuit board you will see two screw adjustments labeled "SENS" and "SCALE". First, draw a mark on both of them with a marker making sure to touch both the screw and the plastic or board. This mark will be used to reset the knobs to their original positions if you mess up. The "SENS" (sensitivity) knob adjusts how hard the helicopter responds to the gyro. The "SCALE" (rotor scale) adjusts the balance between the two rotors. If it is a smooth rotation (as opposed to a skittish, jumpy, or erratic rotation), you need to adjust the SCALE knob as one rotor is consistently faster than the other. On the other hand, if it is erratic and jumpy, randomly spinning in quick bursts, you should adjust the SENS knob. Erratic spinning is a result of the gyro detecting vibrations and overcompensating, throwing the helicopter in a circle. Play with these knobs, try just slight adjustments and keep going until it flies right. Have common sense, don't turn the knobs too far at once, just small adjustments will make it easier. Also if turning the knob one direction makes it worse, go the other direction. If you turn the SCALE knob too much you may lose lifting power because it will reduce the maximum power of one of the motors.

Posted on Jun 02, 2009

  • 23 Answers

SOURCE: my helicopter wont fly

either stripped the main gear inside the heli or the main blades where they slide on the shaft. you should be able to buy a replacement set of blades. try that and see if it'll fly.

Posted on Apr 04, 2010

SOURCE: heli max hicro helicopter just keeps spinning in circles

Spinning is caused by one of the main propellers rotating faster than the other. If both propellers are secured tightly to their drive shafts, the spin control knob on the remote control can be used to stop the spin. However, if one prop is slipping with respect to the other, the spin control knob will not fix the problem.
I've found that the set screws holding the propellers to the drive shafts tend to loosen after a while. If one prop is a bit loose and the other is tight, the relative slippage will cause the helicopter to spin.
To check, turn off helicopter power and manually rotate each propeller separately, watching the nylon gears in the body. If the propeller is moving and its drive shaft gear isn't, the propeller is slipping because its set screws are not applying enough pressure on the propeller's drive shaft.
Carefully tighten the set screw and the problem should be fixed. DON'T OVERTIGHTEN, or the plastic threads for the set screw will be stripped and the propeller assembly will be ruined.

Posted on Apr 23, 2010

  • 1 Answer

SOURCE: my heli syma so31 with gyroscope won't play but

using the left stick push it forward then down to bottom the light on control should stop flashing this means it is synced with chopper

Posted on Jan 09, 2011

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Heli max hicro helicopter just keeps spinning in circles


Spinning is caused by one of the main propellers rotating faster than the other. If both propellers are secured tightly to their drive shafts, the spin control knob on the remote control can be used to stop the spin. However, if one prop is slipping with respect to the other, the spin control knob will not fix the problem.
I've found that the set screws holding the propellers to the drive shafts tend to loosen after a while. If one prop is a bit loose and the other is tight, the relative slippage will cause the helicopter to spin.
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Where can I get copy of instructons - Air SBEGO Mini IR Helicoper


have you made sure that the helicopter is charged completely?

if so when you try to take off if it spins to the left then hit the r trim on the remote and if it spins to the right then hit the l trim on the controller.

honestly all the instructions do is tell you how to put batteries in the controller.

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