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06-06-2014 01:17 PM  4 years agoPost 1
coolingfan

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Grand Junction, Colorado

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I am using the Futaba CGY 750 for my governor on my gasser and says in the manual it will record max rpm. So far it hasn't done this. Is there a setting in it I need to turn on? The manual is not very clear about it. No surprise. Maybe I need to look at the home menu before powering down. Does record everything else it supposed too. But doesn't seem to record max rpm. Could it be because of the Stator Gator? Seems like it work on my Nitro birds, but I was using there sensor. It has been awhile since i have used the CGY 750, so my memory is little foggy. Anyone know?

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06-06-2014 03:46 PM  4 years agoPost 2
Mark Dean

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Maryland

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I am using the Stator Gator and the CGY750. There is no setting change required to see max rpm. Are you sure the Stator Gator is working? A quick way to tell would be to verify that you are reading the rpm of the engine on the CGY750 while it is idling. Are you running the power to the stator gator from a source other than the CGY750. Most versions of the Stator Gator will not work if the power is coming from the CGY750. Most of us make a Y cable and send the power and ground to the receiver and the sensor wire to the FBL.

Mark

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06-06-2014 05:00 PM  4 years agoPost 3
rhodesengr

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Pleasanton, CA USA

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if it is like the GV1 max rpm function, it only records the max RPM at full stick. The threshold is like 95%. If you never push the stick that far, you won't get a reading. If you do push the stick that far and don't get a reading then you may not have set the gov limits correctly. It needs to know where max stick is.

The idea of it is a tuning function so you can see the max rpm with wide open throttle and the gov off. You do a vertical climb rolling on the power to full open and it traps the max RPM at full Throttle. Then you can land, look at the reading, tweak the needle, and try again looking for the max loaded RPM.

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06-06-2014 05:48 PM  4 years agoPost 4
coolingfan

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Grand Junction, Colorado

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Well I don't have mine wired that way. But I am fairly sure it is working. I have 3 flight modes set and when I change flight modes the engine rpm increases. In the radio I have a linear throttle curve set the same for all three? If I turn the gov off how will it record max rpm? I thought the purpose of max rpm was to see if you have over speeding?

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06-06-2014 06:19 PM  4 years agoPost 5
geomecc

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Long Island ,NY

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the only way I can get my gv1 to display is if I leave the max rpm on the screen when flying. not sure why but mabe the 750 is the same. try it

R I P Roman Jr. Team SKOOKUM SRW EFC

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06-06-2014 06:19 PM  4 years agoPost 6
Mark Dean

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Maryland

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It sounds like its governing as you said. The linear curves are the dead give away. I would try wiring it like I suggested. It doesn't hurt to try.
If I turn the gov off how will it record max rpm? I thought the purpose of max rpm was to see if you have over speeding?
The display uses the gear ratio you have set along with the signal it is getting from the Stator gator. The on/off switch does not have to be turned on to read the rpm. Its main purpose is exactly what it says. It shows max rpm, with or without the gov function turned on. Can be very useful to see max rpm on climb outs without a gov. This lets you tune very easily.
the only way I can get my gv1 to display is if I leave the max rpm on the screen when flying. not sure why but mabe the 750 is the same. try it
This isn't required on the CGY750. Also it stores the data even if you turn it off.

Mark

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06-06-2014 07:19 PM  4 years agoPost 7
Carey Shurley

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Orlando, FL - USA

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the 750 will record max rpm regardless of throttle setting. The GV1 would only read it at above 95% of the set throttle high position

however as was noted the Stator gator doesn't work consistently with the 750 unless you feed it voltages above about 3.8 volts. Which means you HAVE to use a voltage jumper.

check the sensitivity with the engine running, it should read no less than 97% and preferably 99%

assuming that this is connected to the RC format engine its also possible that you need to flip the polarity on the sensor at the coil. Generally though if this is backwards you won't get any RPM reading on the display at idle.

with the voltage issue you will get a reading however it may not be accurate

Proprietor - Gas Powered Helicopters

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06-06-2014 10:04 PM  4 years agoPost 8
coolingfan

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Grand Junction, Colorado

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Previously I had adjusted the end points in my radio to prevent binding on my throttle arm. At that time I did not go back and calibrate my governor high and low. Last night I went and re calibrated the gov high and low throttle settings. I have not flown it since.

When I received the stator gator I hook it up according to instructions that came with it. If I remember one of the terminals had a red mark on it and I was instructed to connect the red wire to it. And the other one was black. It also said in the instructions "plug and play". Nothing mention about running a voltage jumper . I am using a life pack 6.6 vdc with no regulation. I have Align DS615 on cyclic and Futaba bls 256hv on rudder and Aligb DS650 on throttle. I am using the futaba 6203sb receiver. Power is provided via the switch connected to life pack and then it plugs into sbus receiver. Power to Futaba cgy 750 is supplied by sbus lead from receiver. Does some one have and example of how they have theirs connected. Pictures appreciated!! Thanks.

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06-06-2014 10:58 PM  4 years agoPost 9
rhodesengr

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Pleasanton, CA USA

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it was plug and play with the GV1. I asked about this jumper business myself a while back. Forget where and when. I am sure Carey will get back to you, but you could use a Y cable into the sensor input. Plug the SG into one leg and cut the red wire back to the 750. The other leg connects to your battery so the SG gets the full battery voltage. The black wire needs to be common to all components.

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06-06-2014 11:56 PM  4 years agoPost 10
Mark Dean

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Maryland

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Pull the signal wire out of the stator gator servo connector. Put that signal wire into a servo connector and plug it into the cgy750. Plug the original servo connector containing the red and black wires into your receiver so it can get power from there.
The cgy750 sensor port only needs to see the sensor wire.

Team Synergy Field Representative, Rail Blades, Scorpion Power Systems

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06-06-2014 11:58 PM  4 years agoPost 11
coolingfan

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Grand Junction, Colorado

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And think all I wanted was to read max rpm. I really appreciate all the good advice you guys give on here. But other then the max rpm on CGY 750 everything else is working fine. I believe I will just fly it and forget about max rpm for now. If I remember correctly this setup works perfectly on nitro. As far as what Carey says about checking sensitivity when the engine is running. Well I am not sure I understand that. Do you mean going into the gov menu and looking at the output from the stator gator when the engine is running? Can you do that safely?

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06-07-2014 12:04 AM  4 years agoPost 12
Mark Dean

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Maryland

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Yes you can check the engine rpm while it's idling. Take off the blades for safety.

Team Synergy Field Representative, Rail Blades, Scorpion Power Systems

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06-07-2014 02:46 AM  4 years agoPost 13
coolingfan

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Grand Junction, Colorado

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Just got back from our flying site. Took canopy off at flying site and sure enough the cgy750 was reading the engine idling. So I flew and then before i turn off power to the receiver I pulled the canopy and sure enough it had the max rpm stored. I thought it would store it until next flight. But it only stores it til ya power down and then, it is gone!!! So I guess long story short. It is working like it is supposed too!!!

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06-07-2014 04:03 AM  4 years agoPost 14
Mark Dean

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Maryland

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Great. What version of firmware are you running? I am on 1.3.1 and I can power off and when it is turned back on my max rpm is still there along with the roll rates and engine time.

Mark

Team Synergy Field Representative, Rail Blades, Scorpion Power Systems

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06-07-2014 02:18 PM  4 years agoPost 15
coolingfan

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Grand Junction, Colorado

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1.4 Thats what I originally thought the CGY 750 did. But it's not working that way now. Sounds like that may be something Futaba needs to address. Not a deal breaker for me. But interesting that 1.31 allows it to work the way. I have my flight modes set at normal 1675, Idle 1 1750, Idle 2 1850 rotor rpm. But when I did a test flight yesterday evening in Flight mode 1, which is set to 1750. Max rpm on CGY 750 was 1858. During the flight I did some loops and flips but nothing else. So I wondering if it is over speeding or the gov settings for head speed is not actuate. I have a optical tach and will have one my flying buddies tach me today.

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06-07-2014 05:15 PM  4 years agoPost 16
Mark Dean

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Maryland

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So we are back to the original suggestion
Give the stator gator the required voltage and the governor should work properly. You are probably overspeeding and bogging.

Mark

Mark

Team Synergy Field Representative, Rail Blades, Scorpion Power Systems

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06-07-2014 09:14 PM  4 years agoPost 17
coolingfan

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Grand Junction, Colorado

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Just got back from the ff. Had my friend use my optical tach. It seems that normal which is set to 1675 reads 1700 and Idle 1 set to 1750 read 1800 and idle 2 set at 1850. read 1850 using the hand held optical tach. That is close enough for me. And as far as bogging goes. That's not happening. Can't hear it over speeding either. Power is good! Flies great!! Thanks for you help. Time to burn some gas!!!

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06-07-2014 10:43 PM  4 years agoPost 18
Mark Dean

rrApprentice

Maryland

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I agree.
Speeds sound reasonable to me. Your welcome and I hope the input helps if you decide to rewire the gator.

Mark

Team Synergy Field Representative, Rail Blades, Scorpion Power Systems

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