Honey Bee King 2 loud noise just before take off?!

[aparkin]

have you got any tape on the blades if so make sure its stuck down properly if its slightly lifted on this helicopter it make a hell of a noise

allso on a side note when you gett fed up of replacing servo gears are servos they these Hitec HS65MG i had some in my king 2 and after lots of crashes are still alive and kicking and ive not changed the servo gears

[ragged411]

Ok thanks I'll secure all wires neatly away. When the noise wasn't there as the blades spun faster it was moving around alot traveling almost a meter at 70% when it was trying to leave the ground at 90% so I'm sure my pitch isn't set well at all.

[ragged411]

I think you mite be onto something with the tape I have got a bit on for the tracking and it was loose underneath so I pressed it down again and then it didn't make the noise for a while and started again. I hope your right! Up for work early now but will be testing that tomorrow.

[cjcj1949]

You do have to do a lot of checking on helis. So many ways of crashing themselves. Sometimes the noises can be ignored, not usually though. If a noise starts and then stops inflight it might mean the heli is about to land as the thing that was rubbing has just fallen off. By the way when you do take off and then want to land lower the throttle gently and try not to land on the tail. Having negative pitch at low throttle isn't essential when starting and it brings the heli down very quickly. To begin with just get the heli light on the skids and then land. And don't over discharge the lipos. Two minutes of use will do until you can measure the discharge. Don't take more than 80% out. You'll need to buy or borrow a charger with numbers on or have some way of measuring cell voltage. Max discharge 3.80V per cell after flying. Also many people have screwed up indoors by something like a mat getting caught in the blades.

If you are the same as the rest of us, you will screw up and do stupid things, but they only seem stupid after the event.

[ragged411]

Thanks for all the help I'll be back on tonight after I've made the changes and tried again.

[ragged411]

Hello,

Tonight set it all up been reading again how to set pitch up finally got it correct and how I want it, 0 to +10. Kinda feel like I wasted everyone's time habit as it turns out it was the tape! But I'll never make that mistake again I suppose, big thank you to everyone that helped tho really am .

Would someone mind explaining to me why my helicopter when getting up to speed still moves around the floor I tried trimming it habit which kinda stopped it spinning, but it still slides in all directions. Not that I'm trying to hover as it is too small a space to attempt it but I would likes it to sit still at least until it was off the ground.
Thank you

[sp4rky-m4rky]

The ground effect is going to send your heli all over without constant input. As soon as it starts to get light on its skids its going to get buffeted around by the turbulent down draft. When you fly its good to pop up off the ground to get out of the ground effect. You will see it takes quite some skill to hover very close to the ground.

Good to see you are over your initial problems. Its all a learning process and its a great skill to be able to diagnose faults and issues. It will come in useful a lot through your flying (crashing) career.

[cjcj1949]

You've got the ground effect as just said, you've also got two other things. One is that helis don't and can't hover with the main blade horizontal. You need to angle the main blades slightly down on the right to balance the force from the tail rotor. Until you get this right the heli will accelerate to the left. You also need to decide if you are going to use hold mode or rate mode on the gyro. If you start with rate mode and adjust the tail rotor to point outside of the right hand skid you should be able to get the heli to stop spinning without trim. You can then switch over to hold mode and the trim is no longer critical as the gyro will stop the heli spinning. You need to have the heli in its take off position, switch on, leave it until the gyro tells you it is initialised and then take off fairly soon. You may have to use your controls to keep the heli level before it takes off, and if the ground is smooth the heli will move left and you must take off quickly. It is easier on grass as there is more friction to stop the heli sliding.

[ragged411]

Ah i see, thanks. i was reading about gyros yesterday as you said. Hold mode sounds the way for me to go to begin with as like you said the gyro will keep my heading for me until i control it otherwise. But i shall give it ago with rate mode adjusting the tail rotor after a test on grass this weekend. You said about angeling the main blades slightly down on the right? is there any chance i could get a picture of this position and is it just a case of moving the blade or a pitch adjustment?
Thanks alot!

[cjcj1949]

Most gyros will work in hold mode without the correct rate mode adjustment. Some older gyros don't work very well in the cold or with changes in temperature. There are now good cheap gyros like the Assan GA250 for under £10. You need to look for a mems gyro. All gyros have temperature compensation built in, but it only works well if the temperature sensor is very close thermally to the rate sensor. This is what mems means. There is a sticky on gyros. They basically measure the speed of rotation and work out where they are, by multiplying the rate by the time. Like distance = speed x time.

[robbancs]

Honey Bee King 2 loud noise just before take off?!

Nothing to set. When you fly it'll settle in that slightly angled position. It's tiny difference, hard to notice, look at a stationary hovering heli.