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Zoom › How do I use Governor mode with Phoneix 25
10-18-2004 09:33 PM  13 years agoPost 1
iskoos

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Orlando, FL

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We used tacometer and read 2300rpm at about 75% throtlle. However this is with 0 pitch. And as soon as you pitch up, rpm drops. How do I set this with governor mode, so it maintains 2300rpm throughout pitch range.

I looked at the manual but didn't seem to understand. It talks about high and low governor mode. What is the difference?

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10-18-2004 09:50 PM  13 years agoPost 2
CRAZYKEV

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Cincinnati,Oh -​U.S.A.

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iskoos,

I use the high gov. mode which allows adjustments in the higher rev range. I would also use at least 85% throttle ( your cc-25 makes less heat and should last longer the closer to 100% ). I run mine at 100% with Park400 motor / 8 tooth pinion and Like90 blades. The higher head speed shouldn't be a problem unless you feel as if it is too twitchy. I cannot remember what pinion you use, but at an 8 tooth let that motor sing man.

Kevin

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10-18-2004 10:16 PM  13 years agoPost 3
iskoos

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Orlando, FL

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CRAZYKEV

Himax 2025-4200
CC P-25
8T
Like90 Woodies

I may go up to 85% and I probably will but I just need to warm up first.
Say I want u, how do I do it?
I have USB interface and can use my computer which makes it lot easier.

So How does it work? I can pick "High Governor mode" but then?
Will leaving the throttle curve straight line at 75% do the job?

Or what?

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10-18-2004 10:26 PM  13 years agoPost 4
CRAZYKEV

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Cincinnati,Oh -​U.S.A.

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I have the USB cable also, it makes it a hell of a lot easier. If you have messed with the cable and know how to use it pick the high gov. mode and you still need to set up your radio to 85% throttle. Don't worry about that 10% differance in speed you really won't notice it too much.

If you haven't used the cable yet you need to down load software from cc's web site and then follow the directions. Let me know if you need more help on this. I am a really slow two finger typer.

Kev

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10-18-2004 10:54 PM  13 years agoPost 5
BlakeMcBrayer

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Georgetown, Ky

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I'll keep an eye on this post too if you need any help on the setup. Here is what I use.

Cutoff Voltage: 9V
Cuoff type: SOFT
Break type: DISABLED
Throttle type: HIGH GOV
Soft Start: SOFTEST (change to fast before trying auto, in case you need to bail out)
Motor Timing: STANDARD
Current Limiting: NORMAL
PWM freg: DEFAULT

Don't come off the throttle untill you see your GOD!

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10-19-2004 04:06 AM  13 years agoPost 6
iskoos

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Orlando, FL

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My ESC setup

I did download and installed the program Kevin so everything is working fine.

My ESC setup as follows;

Cutoff Voltage: 9V
Cuoff type: SOFT
Break type: DISABLED
Throttle type: FIXED
Soft Start: SOFTEST
Motor Timing: STANDARD ADVANCE
Current Limiting: NORMAL
PWM freg: 13KHZ
Software version:1.021

As you can see BlakeMcBrayer, our setups are almost same except the PWM Frequency and throttle type (which I will change to what you set High Gov. mode).

So, I don't think it will be difficult then. I will set the governor to High Mode and then set the throttle curve either 75% or 85% and ESC will do the rest.

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10-19-2004 04:09 AM  13 years agoPost 7
BlakeMcBrayer

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Georgetown, Ky

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You got it. The progam makes it easy.

Don't come off the throttle untill you see your GOD!

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10-19-2004 04:49 AM  13 years agoPost 8
iskoos

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Orlando, FL

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Okay then, what is the High - Low Governor Mode difference?

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10-19-2004 06:10 AM  13 years agoPost 9
ammo

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Singapore

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I set up the travel limits for my cc25 so that i get power as soon as i lift the throttle a little and red light comes on only when i'm at top throttle stick. Then i switch to governor mode and run about 60% but when i fly it, i find that it lights up more than half the time.(which shows that it's running full power)
i'm only doing hovering and gentle circuits now and then...
so i went back to curves again. but if anyone can advice on what to do, i would prefer governor also

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10-19-2004 10:30 AM  13 years agoPost 10
WreckRman2

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Orlando, FL

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Copied from one of my posts on rcgroups explaining a little on how to setup the governor mode.

Here is the thread if you want to read the posts:

http://www.rcgroups.com/forums/show...37&goto=newpost

-------------------------

The main purpose of a governor is to try and maintain a constant rpm or head speed no matter what the load is on the motor. If you setup a governor to run at 2400 rpms with no pitch and you give pitch, place a load on the motor, the governor will automatically increase the throttle to try and constantly maintain the same 2400 rpm.

To setup the governor mode using a Castle Creations ESC you simply select the HIGH or LOW governor mode in the settings. You do this with the throttle stick in the settings mode or by using a USB link.

When using the governor mode you MUST use a flat line throttle curve. This means you setup your throttle curve to 0-85-85-85-85 or whatever with the first number a 0 and the rest all the same. This would be for a normal flight mode. Once you get into using Stunt or Idle Up modes you set them to a constant flat curve such as 85-85-85-85-85.

The number you choose to use on your throttle curve can be as low as 30 or as high as 100. The goal is to set it to what ever number that gives you the desired rpms on your heli. Mine is at 48% but remember that this DOES NOT mean you are running at 48% percent throttle. There is no direct relation between the throttle percentage on your radio and the throttle position on your ESC.

To get an idea of where 100% throttle on the ESC is in relation to your radios throttle percentage setup your throttle curve to have a flat curve with NO pitch. Run up your heli with the stick at full throttle and move your throttle curve until the red light on the ESC goes out. That red light when on means the ESC is running at 100% throttle. You may want to have an idea of what your head speed is at 100% throttle so adjust your throttle curve until the light comes on and stays on then tach your blades. Mine was at 2700 rpms so I then continued to lower my throttle curve until the tach read 2400 rpms. At 2400 rpms the Shogun flys very well and is very solid in a hover.

Once you have your throttle curve setup to run at the desired head speed you can then re-adjust your pitch curve. The goal you are shooting for with a governor is to have the heli run at the same head speed no matter if you are hovering or climbing with full collective.

Hopefully that helps explain it a little. Castle did recommend using the LOW governor mode with the Himaxx motors but I have always ran mine is HIGH governor mode without any problems.

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10-19-2004 12:31 PM  13 years agoPost 11
engwerda

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Melbourne, Australia

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sorry for my ignorance, but whats a tacometre?

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10-19-2004 01:28 PM  13 years agoPost 12
ericfly

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Cornwall, UK

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Tachometer = RPM meter

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10-19-2004 01:52 PM  13 years agoPost 13
iskoos

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Orlando, FL

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Great explanation WreckRman2, but I would be very glad if you touched base on the LOW- HIGH Governor mode differences as well.
Some says, use high gov. mode with higher rpms and low mode with lower rpm. If this is true then what is the braking point between high and low rpms? Say one wants to maintain 1800rpm, would it require low gov. mode?

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10-19-2004 02:30 PM  13 years agoPost 14
CRAZYKEV

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Cincinnati,Oh -​U.S.A.

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iskoos,

I wouldn't recommend that you fly at 1800 rpm. The like90 blades were designed for high rpm. You could e-mail them and ask, but I would imagine that 2000+ is what you should use. I cannot fly 3d yet, but I still am running 100% throttle with Park400 and 8tooth pinion which according to fxaeromodels calc works out to 2700 rpm probably with no load.

2,781 rpm to be exact!

Kevin

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10-19-2004 06:56 PM  13 years agoPost 15
iskoos

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Orlando, FL

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Nope CRAZYKEV, I am not targeting 1800rpm. That was just an example to see when to use high or low gov. mode.
I flew and liked the stability with 2300rpm and will go for it. It may even be more than 2300 who knows?

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10-19-2004 08:56 PM  13 years agoPost 16
WreckRman2

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Orlando, FL

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Great explanation WreckRman2, but I would be very glad if you touched base on the LOW- HIGH Governor mode differences as well.
Thanks... The only thing I know about the HIGH-LOW difference is that a Castle rep told me that if HIGH doesn't work then try using LOW. He did say that being the Himaxx motors are 2 pole motors they will perform better on LOW governor mode. I have always used HIGH so I gave LOW a try. One thing I quikly noticed is that the rpms dropped and dropped alot. Where it currently takes 48% on my radio to maintain 2400 on the head speed in HIGH mode it took 76% to get the same 2400 in LOW mode. What's worse is at 76% the red led light was constantly lit on the ESC indicating it was running at 100%. This meant I didn't have anymore to give once I loaded the blades so I switched back to HIGH mode and will continue to use it. I haven't had any problems using the HIGH mode.

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10-19-2004 09:02 PM  13 years agoPost 17
WreckRman2

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Orlando, FL

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100% throttle with Park400 and 8tooth pinion which according to fxaeromodels calc works out to 2700 rpm
Here is some good math to figure head speed with no loads and it is dead on. I figured mine out to be 2432.876rpm... my tach showed 2430 rpms. You can't get much closer than that.

Now for your case... the Park 400 is 4200kv.

132 tooth main and a 8 tooth pinion
16.5 to 1

4200x11.1v=46620/16.5=2825.4545rpm

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10-19-2004 09:05 PM  13 years agoPost 18
WreckRman2

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Orlando, FL

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Here are a couple other posts by me on that other thread about adjusting the ATV on your radio to match the ESC and on using HIGH vs LOW governor mode...

Just spoke with Castle Creations... he actually advised not to change the ATV for throttle. He said that every heli combo/radio will be different and it's best to just adjust the throttle curve to your desired rpms no matter what the percentage is on the curve. He said just because your radio says 20% the motor/esc could be running at 85% so there is no true way to really know what you are running it at except for the rpms.

He did advise that using a Himaxx motor and using a CC25 ESC it is best to use the LOV GOV mode instead of HIGH. He said the Himaxx motors are 2 pole motors and run better with LOV GOV. I've always ran high so I'll change mine to low and see if it changes anything.

With the 10t pinion mine is now turning 2700 on the head at 100% or with the light on. I am going to adjust my curve in order to bring it back down to 2400 HS and see how she flys like that. The 2400 is a good HS for sport flying but with the 9t it took 100% to get 2400 and with a full collective burst the rpms dropped to 2100. With the 10t I will be able to adjust it down to 2400 and with a full collective burst I hope it will have the extra speed needed to maintain the 2400.

--------------

Well I got time to try a few things... First I setup 0 pitch and adjusted my curve so that I had a 2400 head speed. On my radio this was a curve of 0-48-48. Next I put back in some pitch and went outside to fly it. It flew probably the smoothest it ever has. While hovering the full throttle LED light on the ESC was out. I gave it a few quick full collective jumps and I bet I didn't loose 100 rpms on the HS. During the jumps the LED light did come on indicating it was at 100% throttle but it bogged down no where near what it did with the 9t pinion. I performed just as I had hoped however it was still on HIGH GOV mode.

Next I changed it to LOW GOV mode as the Castle guy suggested. I quickly noticed that the rpms was way down so I tached it and now I only had 1800 on the HS. Way down from the 2400 I wanted so I increased my throttle curve all the way up to 76% to get my desired 2400 on the head speed. Only problem was the red LED light was on. I flew it and it flew just like it did with the 9t pinion. It was bogging way down with full collective because it was already running at 100% throttle just to get 2400 HS. Needless to say I switched back to HIGH GOV mode and plan to keep it there.

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