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HelicopterBeginners Corner › eolo failure
12-03-2005 01:26 PM  12 years agoPost 1
1946

rrNovice

west yorkshire england

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I know this may sound dumb, but after experiencing a lot of heartache, non flying heli, I went back to the Robbe instruction book, Can it be that the motor is rotating in the wrong direction? Would this affect liftoff? I am using a Twist brushless and Kontronik ESC. I assumed these were matched and needed no reversal of wires to get the motor to rotate correct direction? How critrical is the radio setup, i.e pitch curve and throttle curve? Any help most gratefully received. A lot of power but complete failure to take off!!!

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12-03-2005 04:39 PM  12 years agoPost 2
Lorents

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Oslo, Norway

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What way is the rotor turning when you start the motor?
It may well be that your motor is turning the wrong way but if the motor is spinning the wrong way the rotor head will probably not turn very fast. I think the motor direction can be changed in the controller.



What comes around goes around.

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12-04-2005 06:16 AM  12 years agoPost 3
1946

rrNovice

west yorkshire england

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Eolo

Many thanks for that Laurents, but I think there is a lot of power in the current rotation, but I plan on changing the wires today, the battery "drains" very quickly! Can you think of anything else could be wrong?
Thanks again

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12-04-2005 06:18 AM  12 years agoPost 4
1946

rrNovice

west yorkshire england

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Eolo

Many thanks for that Lorents, but I think there is a lot of power in the current rotation, but I plan on changing the wires today, the battery "drains" very quickly! Can you think of anything else could be wrong? Motor at present is rotating anti clockwise viewed from the rear of the heli, that is driving the tail rotor that way (of rotation)
Thanks again

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12-04-2005 07:54 AM  12 years agoPost 5
Lorents

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Oslo, Norway

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Both the main rotor and the tail rotor should turn clockwise when viewed from above and left like on this picture.

I am not sure, but if you have a belt driven tail the rotor could be on the other side, but the tail blade that is closest to the helicopter should always turn upwards into the air.

If everything is rotating in the right direction and it still will not lift check this:

- With the twist 37 motor you should use a 14t pinion (or 15t for 3D).
- You need to have at least 1500 rpms on the main rotor to lift - normal rpm would be 1800-2100. I would guess that this is somewhere between 70-85% throtle.
- Check that you have at least 10 degrees positive pitch at full throtle (disengage the motor before you check).

You could also try to post your problem in the Eolo part of the forum. There are lots of eolo owners that have more knowledge than me there



What comes around goes around.

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12-04-2005 07:16 PM  12 years agoPost 6
1946

rrNovice

west yorkshire england

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Eolo

Well thanks for that Lorents, I have checked the rotation and it is definately wrong!! My direction of travel, which "picks up" the tail rotor and rotates that as well, is most assusredly counter clockwise, so I shall attempt to correct this and let you know the result..
Thanks again

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12-04-2005 07:44 PM  12 years agoPost 7
Thomashome

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West Sussex UK

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I have the Li, Twist 37 & Jazz setup, when I first set it up the motor was going the wrong way, a lot of other odd things were going on.

First I set up the ESC as per the manual, then after a hairly few minutes of it going full bananas and not being able to stop the thing I then took off all the blades and set up my TX (JR9X) correctly and all was fine.

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12-04-2005 08:50 PM  12 years agoPost 8
1946

rrNovice

west yorkshire england

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eolo

I have got the blade rotation correct now, but I did not change any wires?, I turned the blades round to match the new direction, but I still have not achieved a lift off! I think the problem now lies in the radio (set up) However it looked to me that there was "negative" pitch at full throttle, rather odd situation of one blade angled down and the other one up, maybe its back to the drawing board? But seeing as tough I was not the only one to have problems I will persevere!!! Thanks to those who have answered, still appreciate any input??

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12-04-2005 09:06 PM  12 years agoPost 9
Thomashome

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West Sussex UK

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Main blades go clockwise and tail counter, I guess if they don't then you'll get all sorts of trouble and a load of setting up that you don't need to do.

I had mine set up and working but the ESC was not set up for heli so I configured it and that's when the fun started, full throttle went from being correct to down stick so I had to push the stick up to stop the motor which I did not figure out to start with.

If the ESC is set up correctly I don't think that there is anything on the TX that will change the way the motor will turn.

I'm not sure about the Twist but with my other brushless if you swap two wires from the ESC to the motor then it will reverse it, much better solution than having the blades going the wrong way.

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12-04-2005 09:20 PM  12 years agoPost 10
Thomashome

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West Sussex UK

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Had a look at the manual, you can change two wires over to reverse it or you can also change it on the Jazz which I reckon would be your best bet - go through the configuration for heli and it should be fine, you will also get the heli fetures like soft start and governer.

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12-04-2005 10:50 PM  12 years agoPost 11
darrens

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United Kingdom

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1946, turning the blades is not the answer. If the motor is turning in reverse, your one way auto bearing will be in play and it is only the drag from that bearing driving your blades. Best not try to change the esc to change motor rotation. You should disconnect 2 wires and swap them over, however, if you have bought a Twist/Jazz combo then it is colour coded anyway??? The blades must rotate clockwise when viewed from above. Once you have that sorted, it will lift providing you have set the pitch/throttle curves up correctly.
Have you flown helis before, or is this your first?
If in doubt, go to your local club or to the shop where you got it from and get it checked out.

He who dies with the most toys is the winner!

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12-05-2005 09:25 AM  12 years agoPost 12
1946

rrNovice

west yorkshire england

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Thanks Darrens for that, I think the rotation is now correct, that is clockwise under power, but I cannot understand how only placing the blades leading edge before changing wires ( I did not change as you pointed out they are coded) did the trick. I was sure it was turning anti clockwise. It is my first heli and t is difficult as I am at a distance from any club or flyer. I think the radio now needs adjusting. My main concern now is that the rotor blades are appearing to be opposite to what I presume is desired, that is when the engine is throttled up the blades are angled down, or to be absolutely precise one blade has more movement than the other, nevertheless, they semm angled wrong!!!

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12-05-2005 10:05 AM  12 years agoPost 13
Thomashome

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West Sussex UK

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Your tail blades should be fairly loose so they almost drop under their own weight but not so loose that there is play in the grip, the main blades should also be loose but not as much as the tail blades.

Looking at the tail is should rotate anti clockwise as you look at it, the leading edge should point towards the heli on the bottom blade, I had mine set up wrong for a while and never noticed till it got dented on the trailing edge which should be almost impossible.

As Darren said it is best to get someone to have a look at it for you, I ended up driving nearly 2 hours to get mine set up.

If you do persist remember to put the tape over the flybar paddles!

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12-05-2005 10:40 AM  12 years agoPost 14
1946

rrNovice

west yorkshire england

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Thanks to Thomashome, but you have pointed out another problem, the tailblades are rotating in the wrong direction! JHow is it possible to reverse that without reversing the main rotor direction? That is they are going clockwise as are the main rotors, I think I may have also had the rotors a bit tightly screwed in. Thanks for the info

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12-05-2005 10:52 AM  12 years agoPost 15
Thomashome

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West Sussex UK

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When you twisted the belt 90 deg you twisted it the wrong way, you need to take the tail gear off and turn it 180.

If you over twist the belt you will feel the teeth on the belt rub and you'll know when its running freely.

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12-05-2005 12:09 PM  12 years agoPost 16
darrens

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United Kingdom

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Good advice Thomas.
1946, the reason I asked if this was your first heli is that you will obviously need the assistance of a club or training facility to learn to fly this machine, otherwise it will be a very long haul/expensive and dangerous experience if you plan to teach yourself (you will crash). Therefore, it would be worth seeking that help early to get your machine checked out. You should not attempt to even lift off this machine until someone who knows what they are doing has looked it over.
What part of West yorks are you in and where did you buy the heli from?
Have you checked on the BMFA website to find out where your nearest club is?
As for blade angle, when you add throttle the trailing edge of the blade (the thinest edge) should begin to point down. This should be equal for both blades, so check out that your rod lengths are where they should be. However, you will need to set up your throttle/pitch curves and the gyro correctly before flying so I still think you should find some experienced assistance.

He who dies with the most toys is the winner!

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12-05-2005 12:11 PM  12 years agoPost 17
1946

rrNovice

west yorkshire england

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Hi Thomashome, If you are not fed up by now? Well I had to think about your comment for a while re tail rotor, but the rotor is on a wire drive and reversing the whole gear (turn 180degree) will not resolve the direction of rotation. Using the blades to rotate the main mast produces anti clockwise movement at the tail rotor, rotating the blades in clockwise (correct direction?) leaves the rotors static. I do not think much is the matrter, having said that it is quite frustrating not to be able to resolve the problem!!!

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12-05-2005 12:22 PM  12 years agoPost 18
1946

rrNovice

west yorkshire england

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reply for Darrens

I take your point and I have tried to find someone local. I bought the Eolo mail order. I have used a sim for ages now, (nearly a year) but thought I would try to get the Eolo airborne, I am already awre that the heli has potential for disaster and treat it with a deal of respect. When I bought it it was mainly to enjoy the build experience, which I did. I also take on board the position of the rotors with regard to pitch. Mine are not "behaving" in the way they should. I have not worked out why. I thought I had set the radio (JR378) to the instructions, but obviously my level of understanding is not up to that required. I can only thank you for your help and say I am at least a determined tryer, if not flyer! yet.
I am doing adjustments with main motor dis-connected.
Once again My thanks

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12-05-2005 01:14 PM  12 years agoPost 19
Thomashome

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West Sussex UK

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Oh, I thought you had the belt drive as I do, in that case I'd get the main sorted out and then ask Darren!

To configure the speed contoller I think you need the motor connected so remove the main and tail blades while you do it.

Forget your level of understanding, I had sod all when I bought mine, but muddled through it with the help of Darrens and the only thing I had wrong was the tail going the wrong way and the swash plate not level, the reciever too close to the gyro, gyro not set up correctly, I think tht was it!

Maybe best to take advie from one person who knows best, before you get conflicting opinions so I'd drop Darren a PM!!

Good luck, it will all be worth it when you're done!

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12-05-2005 01:15 PM  12 years agoPost 20
darrens

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United Kingdom

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Hi 1946,
Looking at the post you replied to Thomas, if you are a wire drive, you should not be able to go wrong, assuming you have the tail gearbox the correct way up and the tail rotor is on the left hand side of the machine. If you rotate the main rotor clockwise, the tail should not turn as the one way bearing will come into play. However, if you rotate the tail rotor clockwise (the rotation it should be under power so check that your tail blades are the right way round), the main rotor should go clockwise.
Regarding your pitch, when you add throttle, does the swash move up and stay level at the same time?

He who dies with the most toys is the winner!

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HelicopterBeginners Corner › eolo failure
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