Kontronik Gov

[Bellypopper]

Hi All

I am setting up a Kontronik 55-6-18 on my Lepton. It also has a Hacker A30-10XL, with FP3700 4S Lipos & 24T pinion.

I have set up a throttle curve in normal of 0,50,50,50,50, and in order to start the motor I have to move the throttle trim up to mid point. This all works fine.

I thought that to get a higher head speeds in idle 1 & 2, I would need to set up a straight line curves in idle 1 & 2 which I have done (70,70,70,70,70 in idle 1 and 90,90,90,90,90 in idle 2). When I switch from normal to idle 1 or 2, the head speed does not increase :?

Anyone got any ideas why? I don't know the headspeed as I do not have a tach. It sounds quite high, but not ballistic.

The other thing that is of a concern is the flight times. I am using FP 4S 3700 Evo20, and only getting around 4 mins (mainly hovering as I am testing in the garden). The packs drop to about 15.1Volts and take about 2950Ma on the recharge. Does this about right?



Cheers
Russ

[Gscott]

As I posted in the other forum you really need a tach to setup the governor on the Jazz. The throttle % is meaningless. Most likely the reason you don't see a change from idle 1 to idle 2 is that 70% is already full throttle on the Jazz. Full throttle with that motor/pinion/battery combo is well over 3k. I run the same setup and my idle 2 is set to 65% which gives me a HS of almost 3k. After 5 minutes of hovering I'm only putting back 2000mah.

[Bellypopper]

Cheers Gscott, I do have a mate with a tach. I am a little concerned why the current draw is so high. How hot does you motor/ESC get? My motor gets quite warm to the touch, the ESC does not get too warm at all, neither do the packs :?

[Kövi]

Bellypopper,

Have You programmed correctly the Jazz ( mode4 and after mode9 ) ?
However in normal mode You should set the throttle curve to 0-0-0-0-0. Jazz has internal delay for the spinning up. It works extremely smooth!
Start up can be adjusted by a progcard.
But for the mode4 programming you should set the throttle curve to 0-25-50-75-100. If your throttle curve is not the original linear, the Jazz could not be programmed correctly ( the start and the end points of your radio ). After the programming sequence you can set your own horizontal line.
When you could not program correctly the the start and end point the Jazz may not works as it could. Your head speed could be under the optimal 2200-2600. It cause shorter flight time and hotter motor operation.

The final solution is the 5s config. Much less current and heat and much more power and duration. :wink:

[Bellypopper]

Hi Kovi

Thanks for the explaination. I cannot remember if I programmed the straight curve before I set up the Jazz, so I will go back and do it again.

When I first set up the Jazz into mode 4, should I have my throttle trim set to low or should the trim be in the centre?

Thanks
Russ

[FrittsLogic]

I've seen what Gscott said, many times. There will be some throttle percentage, unknown until you discover it, that equates to full throttle for your particular motor. I've come up with what I think is a very methodical aproach to setting up Jazz ESC's in heli mode for the exact speed you want. It's outlined on my website, and essentially equates to setting a pitch curve at 0-0-0-0-0, then a thr curve of 0-25-50-75-100, the spooling up with a tach on hand until you get to the speed you want, and write down what % gave it to you. Beware that the Jazz does this with initial battery voltage as one of the variables. If you set your speeds with a partially depleted battery, it won't be what you want when you plug in a fresh battery (it'll be higher).

[rotodingo]

If this last point is real (voltage batt has some real influence to gov speed) this will be a major difference between a Kontronik Jazz and a Schulze. The Schulze a friend use on his Voyager E has a gov speed that is not depending of the batt voltage. No difference between a hot Ni-Mh batt and a cold one, charged a long time ago. With the Hacker Master Esc i have on my Voyager, speed depends of the batt initial voltage. So i have to set the speed for every flight with my optical tachometer...
Nicolas

[xircom]

I would be surprised, if the headspeed would depend on the battery voltage in gov mode, I would have thought it's the same all the way - similar as if there is more pitch also would slow down the HS. Anyone tried that out ?! :?

[poerqwa]

Bellypopper,

I run the exact same setup on my lepton.
I use the governor of the kontronic and at 50% I get an easy 2500RPM's and 9:30 of flight time after which I put 3200 back in. My guess is that you run at max throttle as you only get 4 minutes and put 3000 mah back in.

I also have the 19/20 tooth pinions of kovi but waiting with installation for my DPR power analyzer to arrive so I can measure the difference and get that information across on this forum.

Greetz,

Marc

[rotodingo]

My Hacker Master ESC really gives me a different gov head speed depending of the batt voltage at start up. Really not cool! But with ly-po the voltage will be almost always the same. With Ni-mh voltage is not the same just out of the charger and 20min after...

Nicolas.