450 Blade 450 spinning out of control, HELP!!!!
- Thread starter concept30
- Start date
EyeStation
Well-Known Member
I was thinking the same thing as RMB677. My belt driven Align 450 FB had this problem when I first acquired it. The plastic gear would stay put on the shaft when spinning at a stable RPM. But as soon as you try to rudder left or right, the extra tension would cause the gear to slip. Troubleshooting it on the bench was tough till it wore itself loose enough to finally slip with a spin of the main rotor by hand.
EyeStation
Well-Known Member
Has this ever been running correctly? Just wondering if this is a new symptom.
I had issues with getting the tail correction going the right way. There is a good video from Lee here, that shows an easy check for your tail setup.
I had issues with getting the tail correction going the right way. There is a good video from Lee here, that shows an easy check for your tail setup.
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EyeStation
Well-Known Member
If you are spinning the opposite direction, you have probably twisted the belt in the tube.
Graham Lawrie
Well-Known Member
Video will help
concept30
Member
OMG it took forever to upload a 3 min video, aside from my speech problem, I think i did a good job explaining the problem.
http://www.youtube.com/watch?v=FYeWkL8IxZo
http://www.youtube.com/watch?v=FYeWkL8IxZo
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cml001
Well-Known Member
No ur not the only one.. I still us my DX6i.. It's a good transmitter! I did notice that ur tail blades are not installed correctly and the rotate in the wrong direction. Your belt is most likely twisted. Watch Lee's tail set up video... He does a great job explaining how the tail works from servo to gyro etc. nice ferret btw! Wonderful animals... Fun to play with.
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They are installed incorrectly and they are spinning the wrong direction.
When looking at the heli from the right side (looking at the tail shaft edge on), the tail blades should turn in a counter clockwise direction. To correct this you will need to put the opposite quarter twist in the tail belt. Secondly, you will have to change the tail blades such that the leading edge is facing in that counter clockwise direction. It looks like you will have to flip on axially (twist it by the end) 180 degrees. At 1:34 in the video you can see that the bottom blade is correct but the top is needs to be facing in the other direction.
Basically what is happening right now is that the one blade on in the wrong direction is nullifying the tail's thrust so the only thing acting on it is the torque of trying to spin the main blades. If you were to correct the wrong blade, it would still be spinning in the wrong direction so it will have the opposite corrective effect you are wanting.
Fix both of these first. This will get you to a good baseline tail rotor and belt setup. Next will be to get the tail servo located properly so that you have good movement in both the nose right and nose left rudder input directions and that it is neutral when the stick is neutral.
After that comes tail gyro setup to make sure it is correcting in the right direction in heading hold mode.
When looking at the heli from the right side (looking at the tail shaft edge on), the tail blades should turn in a counter clockwise direction. To correct this you will need to put the opposite quarter twist in the tail belt. Secondly, you will have to change the tail blades such that the leading edge is facing in that counter clockwise direction. It looks like you will have to flip on axially (twist it by the end) 180 degrees. At 1:34 in the video you can see that the bottom blade is correct but the top is needs to be facing in the other direction.
Basically what is happening right now is that the one blade on in the wrong direction is nullifying the tail's thrust so the only thing acting on it is the torque of trying to spin the main blades. If you were to correct the wrong blade, it would still be spinning in the wrong direction so it will have the opposite corrective effect you are wanting.
Fix both of these first. This will get you to a good baseline tail rotor and belt setup. Next will be to get the tail servo located properly so that you have good movement in both the nose right and nose left rudder input directions and that it is neutral when the stick is neutral.
After that comes tail gyro setup to make sure it is correcting in the right direction in heading hold mode.
Graham Lawrie
Well-Known Member
As they said above so as the slider moves the tail blades are moving inthe same direction also they look not to be centered but at an angle. Spooling up inside with main blades on is dangerous. I learnt the hard way. Especially in a confined space
so as the slider moves the tail blades are moving inthe same direction also they look not to be centered but at an angle. Spooling up inside with main blades on is dangerous. I learnt the hard way. Especially in a confined space
Lee
Well-Known Member
Tail is def spinning the wrong way ad your blades are facing the wrong way. If you look at the picture in your signature you can see those white blades are on backwards too..
So do as Paul said. Twist the belt 180, then turn the blades around. Then use my video to determine the servo and gyro direction
So do as Paul said. Twist the belt 180, then turn the blades around. Then use my video to determine the servo and gyro direction
Derek
Well-Known Member
Well, I think the other guys have gotten you started in the right direction, so I won't echo their comments. Just wanted to say that I still have my DX6i and I use it a lot with my smaller crafts and I use it for a buddy box setup when I take my wife out flying....sometimes my Dad and my cousin, too.
Ken Jackson
Active Member
That has got to be the smallest space I've ever seen anyone spin up a 450, wow. I agree it's backwards.
Ken
Ken