kds450qs

[ansmann1]

hi everyone
I have a kds 450qs heli. Lately the controls have become rather sloppy.Have tried changing all of the linkages and have put in a new esc but still appears to be sloppy. Any ideas appreciated.Was thinking of getting the complete metal rotor head which is the one used on the kds 450q

[ansmann1]

hi everyone
I have a kds 450qs heli. Lately the controls have become rather sloppy.Have tried changing all of the linkages and have put in a new esc but still appears to be sloppy. Any ideas appreciated.Was thinking of getting the complete metal rotor head which is the one used on the kds 450q

any ideas anyone

[tomatwalden]

Unfortunately, CenturyUK isn't a very common make so I doubt many here will be able to give direct advice based upon experience of this heli. However, if you can give a bit more information about what the symptoms are, I'm sure many could make pretty well educated guesses as to what could help. More details the better ... eg.

* what do youy mean by "sloppy"? - ie. poor roll rate? poor climb out rate? lack of heading hold?
* What LIPOs are you using?
* What TX are you using?
* etc.

For what it's worth, I personally can't see what changing the ESC would achieve. Bear in mind that LIPOs have a useful life - are your packs old?

T

[ansmann1]

the control of the heli is difficult the heli veers forward when you move the stick to accomodate this nothing appears to happen so i give it a bit more backward stick and then it overcorrects. the same for side to side. The tail of the heli is still twitching despite turning down the gain. I am using good quality lipos gens ace and also the kds one which came with the heli. They all charge good and certainly the gensace ones are virtually brand new and have only been recharged 10 times each. I am using the stock transmitter and receiver which are kds own make.

I have also changed the swash plate and all the linkages. I assume that the tail twitching and the sloppy response of the controls are linked. any help would be appreciated.

[tomatwalden]

(don't misunderstand this question!) Is this your first heli that you're learning on? Collective pitch helicopters do need to be flown all the time - you can never really let go of the sticks and expect them to stay in one place - constant corrections is par for the course! That said ...

The forward drift is almost certainly an un-level swashplate. You need to use a swashplate leveller to get it level through the complete range of collective pitch travel. Without a level swash, the heli will always drift in the direction that the swash is leaning.

As for nothing happening, until you over-correct. This could be a number of things. (1) - If you're new to this, and don't understand the nature of CP helis, then pilot-induced oscillation (ie. you over-correcting) is quite normal and practice makes perfect. Or it could be (2) - You've got too much Expo programmed into your TX such that the sticks are too "dead" around mid-stick, with accelerating movement towards the end of their travel.

HTH. T

[ansmann1]

This is my second helicopter i started on a fixed pitch honeybee. I am aware that you cannot let go of the sticks. Where will i get a swashplate leveller from ,are they expensive and are they easy to use?
What i cant understand is that the heli used to be much more controllable than this
Can you explain the last bit about expo on the tx please

[David Drew]

TBH KDS helis are not very well engineered.

A friend has one and we have just about swapped out all the electrics in an attempt to get it to fly at all well.

You will chase the problems around until you get it the way you want.

[tomatwalden]

This is my second helicopter i started on a fixed pitch honeybee. I am aware that you cannot let go of the sticks. Where will i get a swashplate leveller from ,are they expensive and are they easy to use?
What i cant understand is that the heli used to be much more controllable than this
Can you explain the last bit about expo on the tx please

Swashplate levellers are pretty cheap - a few quid for a 450 size one. You do need to understand what you're doing, or get someone to help. This video shows the principle pretty well I think. It's based on a larger Align Trex heli, but the principle is the same. Watch from 12mins for the swash levelling bit.

Align 3gx full setup video 2 (freddy can fly) - YouTube

Exponential (expo) is a function of a radio that means the movement of the sticks does not linearly correspond to movement of the servos on the heli. It's often used to deaden the sensitivity of the sticks around the midpoint. The payback is that you still have full travel, so although the movement near the centre is reduced, it is accelerated towards the limits. If you look on Google, there's loads of stuff about it, and better explanations than I can give. Certainly, the right amount of expo can help made a twitchy model controllable.

[Bell47G]

hi everyone
I have a kds 450qs heli. Lately the controls have become rather sloppy.Have tried changing all of the linkages and have put in a new esc but still appears to be sloppy. Any ideas appreciated.Was thinking of getting the complete metal rotor head which is the one used on the kds 450q

Hi I have a KDS my servos have been replaced that's it and still flys very well. Are you using the K7xll are your settings been lost, make sure you have good battery's in you TX, pitch curve. 40-45-50-75-100 if that's any help

[ansmann1]

hi yes i have the k7xII pitch curve on mine are slightly different 43-55-65-72-79 will try your settings tomorrow thanks. have you got kds servos in or are they different ones. was also thinking of changing the gyro settings as nothing seems to happen with the gain screw. also what are your exp settings as i am going to tweak these as well mine are currently set at ail 0 elo 0 and rud 0
gyro is set at +55

[Bell47G]

hi yes i have the k7xII pitch curve on mine are slightly different 43-55-65-72-79 will try your settings tomorrow thanks. have you got kds servos in or are they different ones. was also thinking of changing the gyro settings as nothing seems to happen with the gain screw. also what are your exp settings as i am going to tweak these as well mine are currently set at ail 0 elo 0 and rud 0

OK D/R N aileron 95. Elevator 95. Rudder 95. Expo all at 0
Idle up. All at 60
Gyro settings N + 50. Idl + 50
hope this helps
all standard inc Servos

[ansmann1]

have you had any problems with this heli. so far i have replaced flybar servo gears numerous times, esc, tail servo, blades and linkages

[Bell47G]

Tbh no the only thing I have changed is the blades I use Align Carbon main & tail.
I will be changing the servos at some time to metal geared as the plastic don't last as long.
just sorry your having so much trouble. Hope you get it sorted soon.

[ansmann1]

can you just clarify your d/r settings please mine are a1 100 a2 60 e1 100 e2 60 r1 100 r2 60

[Bell47G]

can you just clarify your d/r settings please mine are a1 100 a2 60 e1 100 e2 60 r1 100 r2 60

Mine are set as 95/60 but you should be ok