RunRyder RC
 7  Topic Subscribe
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 2452 views POST REPLY
HomeAircraftHelicopter
e-
Electric Motors-Controllers-ESC
Other › I was just told noone uses Gov mode
10-06-2006 01:20 AM  11 years agoPost 21
xStatiCa

rrApprentice

New Port Richey, FL

My Posts: All  Forum  Topic

Any of you have a data logger to log the RPM during the flight(voltage and amperage too)?

I am really curious how stable the RPM is held with the newer(as of a few months ago) CC software.

PM  EMAIL  Attn:RR  Quote
10-14-2006 05:59 PM  11 years agoPost 22
DeaninMilwaukee

rrNovice

milwaukee WI

My Posts: All  Forum  Topic

So let me see if I understand this correctly. To get my CC 35 controller to be its most efficient, instead of just using the throttle curve to set rpm in govener mode, ( 40% is giving me 2400 rpm), I instead want to set the throttle curve at 70% and reduce rpm by reducing throttle endpoint at my tx?

I can see how this would set rpm, but I don't see how its any better. Does'nt the esc have to in the end do exactly the same thing either way to get the identical rpm?

Dean in Milwaukee

PM  EMAIL  Attn:RR  Quote
10-14-2006 06:19 PM  11 years agoPost 23
murp

rrApprentice

Nova Scotia, Canada

My Posts: All  Forum  Topic

You want to have your ESC run at 70% throttle at your desired head speed for it to operate most efficiently, basically it will run cooler. Also you want your motor to run the fastest at this point so you should pick the lowest tooth pinion that works.

To do this you can change your gearing by selecting the correct pinoin to get you close. I would recommend making sure that your TX endpoints are matched to your ESC. In fixed throttle mode adjust your lower endpoint so the ESC just arms and the upper endpoint so that the full throttle LED just comes on solid. Now tach your heli at 75% throttle (while in fixed throttle mode), if you get the head speed you want then you are golden. Just switch over to governor mode and adjust the TH point until you reach your desired headspeed again (I find that it doesn't end up being 75% oddly enough), that's it! This also makes sure that you have some head room for the ESC to increase the throttle to recover from heavy loads - and that is another big plus of setting it up this way.

I guess the point to all this is that gearing is important when setting up the ESC. Because ultimately if you are running the right pinion for the headspeed you want this stuff almost works itself out. But you want to avoid running a pinion with too high a tooth count at low throttle - hard on your motor and ESC. Running a pinion with too low a tooth count maxes your motor and ESC out so that there is little reserve power to recover from heavy loads.

The other minor point here is that you must setup all this stuff in fixed throttle mode. In governor mode the TH% does not relate linearly to the ESC TH%. For example, 50%TH in governor mode gives me 2400RPM which is close to 75-80% in fixed throttle mode. If Joe Ford is still kicking around perhaps he can verify that I have this correct - this is what I noticed from using CC ESC's.

BTW - you may already be operating very close to this already - I found that my setup was pretty good but making sure your TX endpoints match the ESC is good form IMO.

Anyhow, I hope this is useful.


cheers,

murp

PM  EMAIL  Attn:RR  Quote
10-14-2006 09:10 PM  11 years agoPost 24
DeaninMilwaukee

rrNovice

milwaukee WI

My Posts: All  Forum  Topic

"For example, 50%TH in governor mode gives me 2400RPM which is close to 75-80% in fixed throttle mode. "

Well that would explain why at 40% gov. everythings staying fairly cool. I can put my finger directly on the esc after 10 minutes of hovering and it only feels warm, and my motor, a 450th is virtually stone cold. I calculated average amp draw in hover and I'm just over 10.

This is good because I already have the 11t pinion on, and thats apparently as small as you can go with a 3.17 shaft.


Dean in Milwaukee

PM  EMAIL  Attn:RR  Quote
10-14-2006 11:33 PM  11 years agoPost 25
Joe Ford

rrNovice

Olathe, KS USA

My Posts: All  Forum  Topic

That is correct murp. Excellent explanation of how to set up a heli properly in gov mode.

Product Specialist for Castle Creations

PM  EMAIL  Attn:RR  Quote
10-17-2006 01:05 AM  11 years agoPost 26
murp

rrApprentice

Nova Scotia, Canada

My Posts: All  Forum  Topic

Thanks Joe - maybe I can get a discount on my next ESC, lol

cheers

murp

PM  EMAIL  Attn:RR  Quote
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 2452 views POST REPLY
HomeAircraftHelicopter
e-
Electric Motors-Controllers-ESC
Other › I was just told noone uses Gov mode
 Print TOPIC  Make Suggestion 

 7  Topic Subscribe

Monday, June 25 - 5:11 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online