Setup
Cobra 2814/16 KV: 1050 3.84oz.
Prop: APC E 9 X 6
Turnigy 4s 14.8V 1800mah
ESC: Castle Pheonix 35
Lines: 012 X 56
Timer: E-flite (for testing)

I am still playing around with this setup. I am using an E-flite timer which allows me to set the RRM using a POT by turning it clockwise from 0 to 100%.   The problem I have is that it is very difficult to set the exact RPM.

For example, if I want the RPM to b e around 11K, it jumps from 10.6 to 11.2K with no gradient in-between.

Although I was able to get a good flight at 11.2K, I would like to have a finer adjustment.  So, I decided to play around with the ZTRON CLT3.0  Timer which I original purchased for this project.

Setting the Dip switches to 80% produced the same 10.6K RPM.  Then I set the power to 90% and still the motor output was still 10.6K.

Question:

1.   Is this because my Governor Mode is set too High “Governor H”?  Would "Governor L" or "set RPM" resolve this"

2.   If I use “set RPM, which as precedence, the ESC or the Timer? 

3.   In “set RPM” mode, should the Timer be set to 100%, or does it matter?

All these options to play with is the main reason I use the KR timer with built in governor feature.  Setup is just like adjusting a needle valve, attach the programmer start the motor measure the revs with the tach and adjust it up or down to where you want it.  It's that easy.  Set up takes about minute and it's done and the RPMs are locked in.  I have four planes with this setup and I really like it.

Hello Heman,
Governor High mode is probably what you want. Simply setting a timer up by taking a stab at the pulse width and then making large adjustments will make you frustrated.
I do recommend that you buy a servo pulse generator/meter that will allow you to control the motor and ESC and actually see what control pulse width you need to achieve the RPM you want to start with.
Then you set up the timer and measure its output with the same meter. Adjust until it's right, and then (in my opinion) you are finally ready to put the beast in the air.
For one thing, you will find that the relationship of RPM to control pulse width is not linear. Small changes in pulse width (equivalent to only two or three percent on the timer adjustment) may change the RPM by 400 or more!
Some timers have better or finer resolution steps than others. All this requires a pulse generator/meter. They used to cost a bit, like the VEXA RC unit I still use but now the import places sell them for less than the plastic case would cost, here at home. Go figure ...

I don't recommend running in SET RPM Mode (though many pilots are completely happy with it!) because I like to keep the option open to tweak the RPM up 100 or 200 RPM for changes in weather from morning to afternoon heat. This requires a timer that is easy to set up. As moderator I try not make a recommendation, but if you spend some time surfing through older threads and reading the "list your setup" section you will see what works for flyers ranging from Sport to high level competitors.

As far as your jumping RPM problem is concerned, try this for some bench tests: put a small prop on the motor just so you can tach it. Then take your timer and set it for 30 seconds run and make a chart of RPM versus pulse width percentage. Try 10%, 20%, 30%, 40%, ... I'll bet that all the RPM from 40% on up are the same in RPM High Gov. You'll probably end up running close to 30%, and 1% steps will be several hundred RPM. When you ask for 80%, you are probably asking for an RPM that the motor/prop/battery cannot make and the ESC produces unpredictable garbage.

Got an RC flying buddy who will lend a TX and RX to the cause? Maybe that will allow you to ballpark the percentage quickly by looking at the TX stick movement.

I hope this helps ... meanwhile go searching through the listed setups for something similar.

take care,
  Dean P.

get the Hubin FM-9V  with programming box - problem solved....you can set the RPM on the programming box to be where you want it - and get 1000rpm up or down from there with the FM9V timer (just aske for the 1000rpm +/- pot) the pot works like a needle valve and changes RPM in real time. 

Yes I already ordered 3 timers from Will, but I am saving them for my big stunter.  The Ringmaster is just for testing and understand how ESC and motor works.

PWM Rate was only set to 4, the default is 12KHz.  Could this be the problem?

Yep! Could be.