Some assembly problem

[Eyass]

Hi guys!

So i am (re)assembling my belt CP and when i test it, and start the engine it spins, and so does the main gear, but the rotor blades aren't spinning.

Im very new to this, but i think its because the engine is spinning the wrong way, or?

Any advice on what's going on?

Thanks guys!

[barks]

is the one way bearing the wrong way?
have you fitted this part?

[Eyass]

i dont think the bearing is in the wrong way, there is supposed to be a small 'gap' between the two gears, right? they are not supposed to be on the side where they are tight. isnt that so?

Thanks!

[Ber60]

Hi Eyass
It seems to me the motor is spinning in the wrong direction check colorcoding of the cables
Or
The main gear is mounted upside down in the gear assembly this will change the spin direction of the one way bearing

[Eyass]

since i havent changed anything but the main gear i reckon that might be the problem...

i put in the one-way bearing into the gear myself. If i put it in with the wrong side first, does that mean tough luck, get a new gear?

Thank you for all your help!

[Ber60]

No, it can be removed and re-inserted without damage but a spare one never hurts.
You will need spare main gears because they are prone to stripping in a crash, just read up on the stickies for better replacement gears instead of the esky ones

[sutty]

Ber60's comments about reading up on the stickies regarding appropriate spares is, I would suggest, a sensible suggestion, but I would go further and suggest that you read all of the stickies. They will answer many of your questions and will help to make sure you are in a postion to set up your helicopter correctly so that it is ready for flight. Actually learning to fly is another matter entirely but there is also plenty of information with regard to techniques which can be employed to get you airborne with the minimum of crashes.

Of course additionally there are lots of top guys on this forum who will be able to give you some great tips and advice to help get you there.

As DierWolf said in your other thread, no amount of simulator time will help prepare you for the point of lift off. It is far more chaotic in real life than on the simulator. On your simulator the models are perfectly set up, plus many, maybe all, do do not accurately reflect the behaviour at lift off.

For example, when you do lift off for the first time, even if your helicopter is set up perfectly, it will almost invariably drift to the left. You have to be aware of this and be ready to correct for it with right cyclic. This is perfectly normal behaviour and is caused by reaction to the tail rotor thrust. Additionally, when you are airborne close to the ground, you will find that your helicopter is a little unstable and will require many corrections just to maintain a simple hover. Again this is normal and is due to the rotors having to operate in the turbulent air just above the ground created by their own down wash being reflected from the ground.

As you will read many times in this forum it is very important to have a good set up, particularly whilst you are learning, or you will have too many things to deal with, too quickly, all at one go. I would suggest that this is particularly true of tail control. If your tail is not stable, as a beginner, you will have great difficulty trying to correct the tail, whilst learning to control the cyclic, to maintain the hover. Again I would recommend reading as many of the stickies as you can, I am sure they will be of great help.

I absolutely love my belt, and it was my first helicopter too, so I know it can be done, but I guarantee you will have some crashes along the way. Be prepared for them, learn from them, do everything you can to minimise them, don't be discouraged by them and before you know it you will be whizzing around sky with the best of them.

Lots of luck and good fun.

[DierWolf]

i'm thinking the motor wires are plugged wrong but hey could be the bearing is in wrong, however that could happen.

[tom dubya]

Did you by chance take out the bolt on the top of the head that conects to the main shaft? There should be a arrow on the bottom of the oneway bearing showing the direction it should turn. Looking up at it , it should point counter clockwise. But those are the only things i can think of that would make the main gear turn and not the head.

[Eyass]

Guys thanks alot for all of your help and replies!

You see now I have reached the stage where I am too afraid of flying it in the fear of something breaking. I haven't even got it in the air yet for crying out loud! =)

Another thing, regarding the Idle Up. Even though I turn it off (pushed away from me) the motor goe on full power, then calms down, then goes on full power etc. Not really behaving as it should in other words.

Please note that the only part of the heli I have changed is the main gear. I disassembled it in order to replace the main gear, so I dont think there is anything wrong with any cables or so

Here is how it looks:

First picture (http://www.djuxe.com/heli/1.JPG)
Here you can see the 1 of the gears, the one containing the oneway bearing. As you can see it is sticking out a bit more on one side than the other.

Second picture (http://www.djuxe.com/heli/2.JPG)
Alright, here you can see how it looks when they both are attached. The side where the oneway bearing sticks out a bit it up, against the other gear.

Third picture (http://www.djuxe.com/heli/3.JPG)
This is how it looks from beneath. The oneway bearing doesnt stick out on this side.

When i hold it up i can see, just as Tom said, an arrow pointing counter clockwise on the bearing, does this mean the oneway bearing is insterted correctly? Because obviously there is
something wrong with it, since the gears are spinning the wrong way, making the helicopter blades not moving at all.

Thanks for all the help guys! I am forever greatful!

P.S The pictures are taken with my phone camera, bare with me on this one =)

[DierWolf]

Your motor is spinning the wrong way OR you inserted the bearing backwards it can only be those 2 things.

its easy to test, put the main gear back in the heli, move manualy by thumb the main gear clockwise and rotor should spin, if it is not then bearing is installed backwards...... if it DOES spin the rotor then your motor is spinning the wrong way (swap any 2 wires going from the motor to the esc)

[Eyass]

trying what you wrote....

[Eyass]

Alright, so i solved the issue with the blades not moving when i turn the main gear, however there is still a problem:

When i connect the heli to the battery and turn the controller on i can see how it changes its configuration when i move the side rudder (not sure what its called in english, but not the throttle, the other stick) and when i push the throttle forward the blades adjust aswell, but they dont spin.

So basically the chopper is operating as it should, except for the fact that the blades aren't spinning, not even the engine is moving...

Thanks for all the help guys!

[tom dubya]

"When i connect the heli to the battery and turn the controller on "

Is that the order in which you doing it or did you just type it that way.

[Eyass]

Haha, silly me, i put the battery in first..now the engine spins

But the problem remains...the main gear is spinning the wrong way...i think i might have put in the oneway bearing the wrong way...

Another thing that concerns me...when i turn the controller on the engine doesnt spin until i put the throttle on (of course, thats how it should be) So as soon as i move the throttle engine starts moving, but when i turn the throttle off the engine keeps on spinning, and the throttle goes up and down by itself, without me touching the throttle stick.

This isnt a problem right now, since the blades aren't spinning...but if they were...:roll:

Wow, i really need to get someone that knows these kind of stuff...too bad I dont know anyone :bomb:

So lets say i put in the oneway bearing the wrong way, couldnt i just flip the gear around, so its 'upside down' so to speak? so that the bearing gets the right way up

Any thoughts on the throttle problem?

[tom dubya]

No the gear can only go in one way to allow for the correct spacing between the gears.

[Eyass]

yeah but i figured if i press the one way bearing so it sticks out on the other side instead of the current

http://www.djuxe.com/heli/1.JPG

So i press down the bearing so it sticks out on the other side, and then flip the gear and put it in? Wouldnt that work? That way i keep the spacing between the two gears

[DierWolf]

Something is serously wrong if your motor is spinning up and down on its own with the Collective Stick (Throttle, left stick) all the way down.

a video of what its doing would be great.

[DierWolf]

did you try spinning the gear clockwise with your hand to test the bearing that way as i asked you to do? or are you still assuming its the bearing in the wrong way.

[Eyass]

Thats the thing...i spin it clock wise and the main blades turn, just as it should be i guess...but when i put the engine on the blades don't turn, because the main gear is spinning the wrong way (counter clockwise) but it wasnt like that before, and i havent moved any cables ...thats the strange thing...

Thanks for all the help! really appreciate it!

[DierWolf]

1 and 1 always equals 2.

I told you what to do if it is spinning the blades when you turn the gear clockwise... if its turning the blades then nothing wrong with your bearing its your Motor Wires are backwards.

Take any 2 of the 3 wires off the motor and SWAP them.. that will make the motor run in the right direction.

From there we move on to other things.

If you never touched the wires and it worked fine before then something is wrong with your ESC (which is sounding more and more obvious since your motor is runnign up and down on its own)

Take off the Blades and switch the wires like i said and try again.

[Eyass]

You're a genius! changed place on 2 of the 3 cables and now it works! now im just gonna assemble the whole thing and try it out.

Still need to do as it says in all the stickies though, in order to make it config right.

Now im not using the carbon blades, i put on wooden main blades. In the back i have plastic tail blades. They are cheaper, and i guess they arent as stable, correct?

Thanks for all the help man!

[DierWolf]

Nothing wrong with plastic tail blades.

And if the carbon fiber blades you have are from Esky... Good luck, those things track like Crap! stick with the woodies until you learn not to crash so much.

[Eyass]

Yeah that was my thought too....now its just to reassemble this baby and try it out! =)

As you probably have understood im not the best mechanic in the world =)

[DierWolf]

Obviously if you were doing all we said there with it unassembled. LOL