Anyone use eMultiGov?

[ArthurKnowles]

I really hate the way my Jazz/CC/InsertFavoriteEscHere govoners work on my electric helicoptors. I detest the spool up and way my heli spins on the ground before I can center it and take off. I have not found a single govoner that actually does a better job than standard throttle/pitch curves.

I do like the way the govoners for glow/gas work (MA Throttle Jockey & CSM/Stator Gator) and I just bought a MultiGov for my Shuttle. At the same time I bought an eMultiGov for my Lepton. It it works well, I may put one on my TRex.

Before I plug it in to my Lrpton though, I thought I'd ask if anyone else has done so already and if/what tips/tricks they can offer. One I can offer is that the MA optical sensor works with the eMultiGov/MultiGov so you don't need to mount the magnets for sensor readings.

[rotodingo]

Curious. Some ESC are doing bad thinks about start-up but the new software of the CC ESC has so much options that you can have a very smooth spool up. My Jazz is also doing a great job on this. Very smooth and reliable when setup to 12 secondes.
The CC software (with the castle link to do the prog) is giving you even more options. You can do anything.

Nicolas

[ArthurKnowles]

I know people like the Jazz ESC because of the govoner, but it is not working for me. The CC ESC does have more options, but I can't always get it to initiate. I have to max my throttle ATVs and even then it doesn't always work in my TRex.

I have really had enough of of ESC govoners! Guess I'll just have to be one of the first with a eMultiGov on a Lepton. Now I'm just waiting for my swashplate leving tool to finish the setup.

[TMoore]

I agree with Nicolas, my CC80 feels just like a nitro machine when I spool it up and flies just fine when it's in the air. I don't need a swash leveling tool to set up the swashplate either.

TM

[ArthurKnowles]

I don't need a swash leving tool either as I have set up many helicoptors without one. However, having a leveling tool, or lock for the swash, helps a lot and can provide a much finer setup.

As for govoners, well I guess if you fly off of grass or something else with enough sticktion to mask the spool up issues then you are in great shape. I fly off cement or bare dirt and I do not like the way my helicoptors spin at spool up. Nor do I want to have to flip in to idle up mode to enable the govoner on the ground before I fly. I much prefer the glow/gas setups so I have a normal, idle up 1, and idle up 2 setup. Hence the eMultiGov. I just hope it works as advertised.

[TMoore]

I don't need a swash leving tool either as I have set up many helicoptors without one. However, having a leveling tool, or lock for the swash, helps a lot and can provide a much finer setup.


How does the swash tool help with the linkages from the servo to the swash? After all, if the linkages aren't exact and the servos perfectly centered and symmetrical, leveling the swash is a moot point, right?


I much prefer the glow/gas setups so I have a normal, idle up 1, and idle up 2 setup. Hence the eMultiGov. I just hope it works as advertised.


I guess I'm missing something here. The CC80 works just like an IC engine. My pitch and throttle curves are almost identical to what I use on an IC setup except the 3D flight modes don't use a flatlined curve for the throttle.

TM

[ArthurKnowles]

I don't need a swash leving tool either as I have set up many helicoptors
How does the swash tool help with the linkages from the servo to the swash? After all, if the linkages aren't exact and the servos perfectly centered and symmetrical, leveling the swash is a moot point, right?


The swash tool will keep your swash level. Period. That makes fine tuning the link lengths much easier. No eyeballing to see if it is perpendicular to the shaft. Plus you can use the swash leveling tool to check for servo interactions or misbehavior when cylcing the pitch. Even the smallest error is visible. The version I used on my TRex was quite a help in setup and getting 3 servos to work at the same speeds/movement (just because you use three identical models doesn't mean they work the same).


I guess I'm missing something here. The CC80 works just like an IC engine. My pitch and throttle curves are almost identical to what I use on an IC setup except the 3D flight modes don't use a flatlined curve for the throttle.


Not for me. Neither the Jazz or CC work to my satisfaction with the govoner enabled. They work just fine using standard throttle (0,25,50,75,100 - est) and pitch curves. Also, if you are not using flat throttle curves for 3D then you are not really using a govoner mode either. Sounds like you have the same concerns I do. :) So you use standard throttle & pitch curves and cyclic to throttle mixing to hold that main blade RPM constant.

[TMoore]

Arthur,

I don't use any cyclic to throttle mixing although the Stylus is very good at that. I haven't found the need. The Stylus has the capability to fine tune CCPM setups and I haven't found the need to use a leveling tool as my pitch gage works just fine for swash leveling. Once I get the head on, I only take it off to balance the flybar.

TM

[ArthurKnowles]

Hmm, not sure how you use a pitch guage to level a swasplate. Care to explain?

The best I can do without something to lock the swashplate level (U clamp or flybar clamp) is to build all linkages the smae length for an ecpm setup with servos in a 120 or 90 degree setup. That's assuming of course that all servos are at neutral and exactly the same distance away from the swasplate. But even using my linkage tool (used to get all the links the same exact length) I've had to make small adjustments to the linkages to get the swash level.

One of the reasons why I like a tool to lock the swashplate in place is to set the linkages to the same length (using a tool to measure/set them), then I can move the servos a bit in their mounts if there is room to slide them up/down/left/right so they are truely centered.

I'm not an expert, but I have found that if you can set up the helicoptor presisely enough, it will often hover hands off for a significant time and be much easier to control. I like my mechanical setup to require zero trim settings and work hard to achieve it. But I'm alwasy open to easier methods to get it done.

[TMoore]

Hmm, not sure how you use a pitch guage to level a swasplate. Care to explain?


Sure. If you place the pitch gage on the flybar paddle and you rotate the head you can see if the swash is level or not by using the pitch gage as an alignment tool. It's much more accurate than a swash leveling tool with the head off because what you are looking for is no motion in the blades or flybar paddles as the head rotates at any pitch setting.

TM

[Jafa]

I really hate the way my Jazz/CC/InsertFavoriteEscHere govoners work on my electric helicoptors. I detest the spool up and way my heli spins on the ground before I can center it and take off. I have not found a single govoner that actually does a better job than standard throttle/pitch curves.


Coming back to the original post - what on earth is going on here?

When you put a Jazz into heli mode it defaults to a soft spool up
which is an absolute delight to use
When I spool up the Lepton I go straight to zero collective (55% throttle)
and wait for the headspeed to come up
The Lepton does not spin on the ground during this process
I think the Jazz is the best ESC I've ever had

[ArthurKnowles]

[quote]
Sure. If you place the pitch gage on the flybar paddle and you rotate the head you can see if the swash is level or not by using the pitch gage as an alignment tool. It's much more accurate than a swash leveling tool with the head off because what you are looking for is no motion in the blades or flybar paddles as the head rotates at any pitch setting.


You must have better eyes than I have, because I can't use the flybar paddles and/or pitch guage to determine if my swashplate is 100% perpendicular to the mainshaft. That's why I need a swashplate leveling tool or flybar lock. And truthfully, I use the flybar lock to set my pitch of the main blades and that works well.

But my greatest difficulty is always making sure the belcranks/servos/whatnot are correct with the swashplate level (i.e. perpendicular tot he main shaft).

FWIW, I've even tried to use a bubble level to set up my helicoptor stand and then the helicoptor. But using a buble level blanced on the head button or main shaft is difficult. I'd much rather use a leveler that fits ont he mainshaft. What I can say is that a helicoptor that is set up with all axis at 90 degrees/perpindicular/horizontal/etc. as required sure flies a lot better and drifts very little. I just wish I could find an easier way to do it. Or had better eyes to see it with.

[ArthurKnowles]

Coming back to the original post - what on earth is going on here?

When you put a Jazz into heli mode it defaults to a soft spool up
which is an absolute delight to use
When I spool up the Lepton I go straight to zero collective (55% throttle)
and wait for the headspeed to come up
The Lepton does not spin on the ground during this process
I think the Jazz is the best ESC I've ever had

I'm glad you like yours. I'm not happy with mine. I do like the built-in BEC, but the govonor doesn't work for me. I do have the eMultiGov installed now and am happy with my bench testing. Tomorrow, or next week, I'll get a chance to fly it and see how I like it in the air.