FF heli goes sideways

[tacotacocat]

When launching my FF heli at high torque (idk in-oz, but its about when my 15-1 winder 's gears begin to creak and becomes hard to turn. (65-70+ winds on winder).

The bottom rotor bends down while going up (I think from force of acceleration) and it starts going sideways for about 10 seconds (usually hitting a wall) . When the torque levels out it goes up and flies normally

The heli weighs 4.00g( 3.7g+0.3g ballast clay on bottom )

Motor is 15in loop of 0.125 rubber that weighs about 2.4g, but this phenomenon happens with all motors that I try

I don't have a torque meter, would that help?

This may be a build issue, if it is can you find what I need to fix?

Thanks

TACO

[PrancingPlane]

I have a similar problem when launching at about ankle height and ~1.5 in/oz torque, or about 85 turns on my 10:1 winder. For me, at the very least, it was solved by launching about chest height and decreasing torque a bit.

[coachchuckaahs]

Please try to report winds on the motor. This is REQUIRED in your log, and takes the winder ratio out of the thought process.

The rubber will break at around 1784 turns according to your data, and you are putting on 1000-1050, so you are NOT winding very hard at all. You want to wind by torque more than turns, and reach a torque at least 1.6, preferably over 2.0, then back off to a safe launch torque 0.8 to 1.4 oz-in.

If your bottom rotor is flexing downward, it is possible it is built backwards. This would result in the rotors fighting each other and would explain your issue. Both rotors should be lifting. In order to do this, the bottom rotor has opposite twist compared to the top rotor. If possible, post some photos somewhere and put a link here. Specifically an end-on shot from the tip or each rotor would help.

So the main issue MAY be a rotor build issue on the bottom, and a second issue is improper winding.

Coach Chuck

[bjt4888]

When launching my FF heli at high torque (idk in-oz, but its about when my 15-1 winder 's gears begin to creak and becomes hard to turn. (65-70+ winds on winder).

The bottom rotor bends down while going up (I think from force of acceleration) and it starts going sideways for about 10 seconds (usually hitting a wall) . When the torque levels out it goes up and flies normally

The heli weighs 4.00g( 3.7g+0.3g ballast clay on bottom )

Motor is 15in loop of 0.125 rubber that weighs about 2.4g, but this phenomenon happens with all motors that I try

I don't have a torque meter, would that help?

This may be a build issue, if it is can you find what I need to fix?

Thanks

TACO

Taco,
What kit are you using?

Things to check are:
1. Are rotor shafts perfectly aligned with fuselage? No down thrust or side thrust angles.
2. Rotor blade tip pitch angles per kit instructions.

The teams I coach have built 16 Freedom Flight helicopters and some were a little wobbly or veering in flight till the above were corrected.

Brian T