V-Bar Neo Governor Settings (Gear Ratio)

[ronaldst]

I got a GAUI X7 with a 520kV motor, 10T pinion on motor, main gear on helicopter is 100T. I have probably messed up something in the settings.

I can not hear any difference in RPM when switching banks. Castle 160HV log is showing full throttle at about 2300RPM continously.

Bank 1 is set to 1900RPM
Bank 2 is set to 2000 RPM
Bank 3 is set to 2100 RPM

Neo logs are showing this in Bank 1
Warn 7:38 Governor Full Throttle

What should gear ratio be set to?

I have used the expert icon in Neo Setup, and choosen pinion/main gear, and thought that was sufficient..




But after a closer look I see that the Gear Ratio in the main/easy setup was showing 11.78. I changed this to 10.



Is this correct?

Could this be the cause of my motor running at max RPM before?

Documentation on Vstabi is not good enough. I need some assistance here.

[K2Freak]

Are you sure that the motor is 10 poles?

[ronaldst]

Originally Posted by K2Freak

Are you sure that the motor is 10 poles?

Yes, it's the Align 800MX Brushless Motor(520KV).
http://www.align.com.tw/ManuaLib/Hel...M01-G20414.pdf

[3D Dave]

Make sure the Castle is in external gov. mode.

[K2Freak]

the fact that the V Bar Software reflected the gear ratio Wrong by as much as it looks like it did could definitely have an effect. Have you retested it? In my experience you can take off your blades and play with this all day on your bench.

[rcflyerheli]

One quick way to check out your gearing setting is use the built in Castle link calculator. Just go to demo mode, set heli-governor mode-set RPM, and enter your required information and you will get an idea of what the ESC is capable of doing.

With your ratio of 10 (100/10), you will top out at about 2050, Asking for 2300 headspeed will give you full throttle messages and you will likely tach just a tad more than 2100 headspeed. To get what you sound like you desire, you need to go to a 12 or 11 tooth pinion.

[Vinger]

Castle settings to enable the use of VBar governor are here https://www.vstabi.info/en/node/1979

Your gearing (10t) allows for 1900 to 2000 rpm selection. An 11t pinion will allow 2050 to 2200 rpm to be selected. 12t pinion will allow you to run 2200 to 2350 rpm.

[ronaldst]

Originally Posted by 3D Dave

Make sure the Castle is in external gov. mode.

This is already set.

Originally Posted by rcflyerheli

One quick way to check out your gearing setting is use the built in Castle link calculator. Just go to demo mode, set heli-governor mode-set RPM, and enter your required information and you will get an idea of what the ESC is capable of doing.

With your ratio of 10 (100/10), you will top out at about 2050, Asking for 2300 headspeed will give you full throttle messages and you will likely tach just a tad more than 2100 headspeed. To get what you sound like you desire, you need to go to a 12 or 11 tooth pinion.

I entered pinion/main gear numbers in the log viewer. Is this the one you are referring to?

Am I that much off in my calculations? I used MrMel HS Calculator.



Am I reading the numbers wrong?

Screenshot of the Castle Log Viewer

[Vinger]

10t pinion, external governor and 12S packs




11t pinion




12t pinion

[ronaldst]

Originally Posted by Vinger

10t pinion, external governor and 12S packs

Is that with a 520kV motor? Cause I am able to replicate your numbers if I do a 500kV motor.

I've used MrMel HS calculator from here: MrMel headspeed calculator v3

Even so it should be capable of doing 1900 RPM when this is set. By the Castle logs it runs on max power the whole flight.

How do you explain that? Is it my gear ratio settings or not? (noone seem to be able to answer that...)

[tshelby73]

Sounds like gear ratio should be 10. I think the mikado calculator just tells you what your ratio is but you still need to enter it on the governor page. If 2 stage like Your’s it’s easy to figure on your own you just divide your main gear by your pinion. So 100/10=10.


Sent from my iPhone using Tapatalk

[Vinger]

Originally Posted by ronaldst

Is that with a 520kV motor? Cause I am able to replicate your numbers if I do a 500kV motor.

I've used MrMel HS calculator from here: MrMel headspeed calculator v3

Even so it should be capable of doing 1900 RPM when this is set. By the Castle logs it runs on max power the whole flight.

How do you explain that? Is it my gear ratio settings or not? (noone seem to be able to answer that...)

520KV motor and external governor

[ronaldst]

Originally Posted by Vinger

520KV motor and external governor

Im not able to replicate your numbers by using any hs calculator. Can you please explain how that is?

[Vinger]

Don’t know but that is Mr Mells app on my phone, get the same numbers on iPad app as well. Only the apps are updated NOT the webbased one.

You have to select the correct parameters from battery to which governor you use.

[ronaldst]

Originally Posted by Vinger

Don’t know but that is Mr Mells app on my phone, get the same numbers on iPad app as well. Only the apps are updated NOT the webbased one.

You have to select the correct parameters from battery to which governor you use.

Calculation


Result


This is the results I am getting. Even with the differences in HS calcs it should not be a problem to run governor to 1900 RPM. And it does not explain the reason why my motor is running on 100%.

[Vinger]

10t pinion should give you the correct performance at 1900rpm.

Please check my earlier post about CC settings and then do the VBar governor as per vstabi.

See you also posted on the forum at vstabi, you have to enter the correct gear ratio and not just calculate it.

Which radio system and where have you plugged in the CC on the Neo. You have to adjust your radio as per https://www.vstabi.info/en/neo_transmitter

It seems as if the CC is not geting the proper signal from the Neo. You have to remember that the Neo is in charge of throttle control and NOT your TX.

[ronaldst]

I'm just going to cut to the chase here. I've done another flight today, and to answer the original question in the first post: YES the gear ratio being misconfigured was the reason the governor was all bent out of shape.

I got a 10T pinion and 100T maingear, which makes it really easy to calculate to 10.0 in gear ratio.. So I knew something was not right when I saw gear ratio being 11.47. If I had any other combination of pinions/gears I would probably not have realised it was wrong.

To me it was not obvious that the expert menu was just a calculator, and the settings do not transfer over to the governor gear ratio setting automaticly.

The documentation is, once again, completely rubbish with outdated pictures and non-obvious settings aren't explained in a understandable manner.

Dear Mikado/Vstabi...
I am going to point this out once and for all. Vstabi homepage, including their forums (which does not offer a proper translated english version) have a poor layout, is really hard to navigate, and is lacking in most areas.

Most of their documentation is containing outdated naming (of settings etc.), poorly written descriptions, and old pictures (of which newer Neo users can't relate to).

The FBL is awesome, and is the only reason I keep banging my head towards the wall trying to figure stuff out on my own, or through forums like Helifreak.

[Vinger]

Mikado does not provide support on forums other than their own at vstabi. Their website does take a bit getting used to but actually well laid out to find your settings easily. They are the ONLY FBL company that provide speedy response to questions and problems in their own forum.

If you want to make suggestions as to how and why they should change on their site, the best way is to raise your gripes on the forum over at vstabi.

To get to your confusion as to how to enter the gear ratio, they made it easy for you to CALCULATE the ratio ( it even has a heading called CALCULATOR) and then enter the ratio in the governor page. The step by step setup for ESC as well as radio config is all on their website, so with a bit of patience you will find it there.