I am new to heli's.

I just bought a blade cp Yesterday and all was fine. I was able to hover and it was very stable, but today after a couple of flights the heli started to jump up and back to the ground at a little over half throttle. If anyone has any ideas it would be great. I dont even know where to start looking. If this was a plane i could have fixed the problem

Sounds to me like a radio glitch. Normally anytime a heli or airplane for that matter does real quick jerky movements on its own, its usually the result of interference.

Untie the antenna from the landing skids, and arrange it where its more exposed. There are a couple of methods of doing this.

Wrap it around a straw, or even let it hang down. Just make sure it doesnt get into the rotors.

Also make sure your transmitter antenna is fully extended. Dont point the antenna at the helicopter as there is a "dead" zone near the tip of the antenna.

That is what i thought was to, but i have already tried that....
One thing that i did notice on the last flight was when it started to Jump is thet main rotor speed was going up and down with me putting no input on the trottle. i would go just above half on the trottle and the heli would jump.

could it have anything to do with the battery pack that came with the heli?

As this is my first heli, it is also the first rc that i have dealt with that is all eletric.

Its possible that it could be battery related, but it still sounds ALOT like a radio glitch or interference.

Try flying it somewhere else, and see if you get the same thing. If it stops, then you know there is something causeing interference where your flying. Stop by your local hobby shop and change the crystals in the radio and reciever out for a different channel.

ok you were right....it was the place i was flying.....i went to another place and did not have the jumping problem. Thanks for the help on that issue.

Now i have a new problem. the heli is tracking hard to the right. i have the aileron trim all the way to the left and it is still tracking to the right. [:@]


what do i adjust to resolve that issue. and help would be great. if i get the problem solved i should be able to pretty much be able to come straight of the ground.

put the heli on a level surface is the swashplate level? ( dont forget to put the trim on the transmitter back to the middle position while checking this) if the swashplate is not close to level, youll have to pop off the 2 most rearward servo arm ball links that connect to the swashplate and lengthen or shorten them,

If the swashplate is tipping to the right ( making heli go right) then the back right servo arm take it off the swashplate and turn it out a half a turn to make it a tad longer, and the left back servo turn it in a half turn to make it a hair shorter, snap them back on and recheck the swashplate to see if its level, as long as you can get it real close then you can just tweak it with the aileron trim on the transmitter.

You can probably just lengthen the right back servo arm and not need to shorten the left back one. but this will end up changing the height of the swashplate and might change your pitch curve.

now that is to adjust the swashplate levelness from left to right


but if its out of level front to back also, you would do it alittle different, you dont want to disturb the swashplate height ( assuming its set correctly) so if the swashplate was leaning forward, you would want to lengthen the front most servo, and shorten the two furthest back servo's This allows the swashplate to pivot on one point instead of changing heights like you would get if you adjusted just one servo.

Well i am a idiot. I was looking at the swashplate and notice that the front end was very low. I throttled up the heli and watched the front servo and it was jumping up and down and the servo would never center.
so i just by luck noticed that the servo wire was just a liitle lose in the 4 and 1 unit. made sure that the servo was connected correclty and that solved all the problems.

Since i am just beginning in heli and i dont land as soft as i should i guess the wire was knocked loose.


Thanks for all the help... Hopefully soon i will be asking how to get the heli inverted.

"...getting the heli inverted."

Pray, burn a offering to the heli gods, and hold on for dear life. A four-leaf clover taped to the back of the transmitter and another one on the heli wouldnt hurt either....LOL

Humina Humina Humina Chitty Chitty Bang Bang wave a dead chicken.....

is it that difficult with the blade cp to get it inverted?

To get it inverted....no, just shove the cyclic in some direction
To fly it inverted....yeah. Trying to fly with everything backwards, and using collective is wild.
Its a handful, its not the heli's fault, I just need more practice.

The heli is stable, and perfectly capable of doing inverted flight. Ive flipped and rolled it a few times and attempted inverted hovering, but I have to let my heart rate go back down afterwards. Talk about an adrenaline rush. You'll be shaking like a leaf afterwards.

ya i know about the heart rate. just getting mine 2 hover make mine heart go nuts.

Just had my first bad smack on the ground. took a little wood out of the ends of the main rotor. If i clean up the ends of the main rotor should it still be ok to fly? or should i go out and replace the blades right away?

I would recommend replacing them for two reasons.

1. They are probably out of balance now. Which will make the heli not perform at its best.

2. There is a lead weight in the tips of the blades. If you continue to fly it, its possible that the lead weight will "sling" out of the blades. If it does it becomes a VERY fast moving metal projectile. I did this with my flat blades, and the thin lead weight put a dent in the wall. Im just glad it didnt hit me. Also the lead weight is a thin rod about 3" long. Which is like a flying lead needle if it comes loose. As we all know lead and the human body dont mix.

cool, i was going to replace them any ways. i might try to sand the ends down and make sure that the lead wait is secure. I am pretty good at balancing and monokoting.....if that work i will have a spear set if i can not get to the hobby store......