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Ace Hobby . Esprit Model . Thunder Power RC

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Radio - Servo - Gyro - Gov - Batt > GV-1...How to hook up and does it really help?
 
 
Kurt64
Veteran
Location: Salladasburg, PA

I am considering the GV-1 governor to help keep my TT70 at a constant RPM in my Rap 60. First, I am using a Hitec Eclipse 7 channel radio and the gov manual says that it needs at least 8 channels....why, I dont know. Anyway, is the GV-1 really worth the money for a guy that is just entering true 3D flight? Right now, I am working on inverted stuff and just kind of whipping the machine around doing the usual loops, rolls, stall turns, etc...will it really benefit me at my skill level?
I also wondered what the best hookup method would be when using the Eclipse. I would like to use a switch (gear switch) to be able to turn it off in case of failure, but I am using that channel for 401 gyro control. I can move the gyro control to the flight mode switch so that is no big deal. If the GV-1 fails, do you still have manual throttle control? How does the governor work when you hit the throttle hold for autos?
Would I be better off just getting a more powerful engine?
I know this is fairly long-winded but I need some help. Thanks
06-29-2002 Over year old.
 
 
tadawson
Elite Veteran
Location: Lewisville, TX

Kurt -
You can run the GV-1 in several ways, needing from zero to two additional channels. The simplest is to plug in into the throttle RX port, and plug your throttle servo in to the GV-1, and set the GV-1 speed on the GV-1, and use the throttle stick position to enable/disable the govenor. In this case, the govenor will enable itself at about 20% throttle, and will then kick in when you get to 70% headspeed. It will drop out when you get to 15% throttle or below. When you go into your idle-up curve, it will never drop out, which is what you want.

The next more elaborate thing, is to use a channel to control speed as well. For this, you need (ideally) a three position switch (on my 8103, the flight mode switch toggles ch. 8 from -100%-0%-+100%, which is idea for this - perhaps you have something similar on your radio?) and then you can set a speed on the GV-1 corresponding to each flight mode, which is good if you want an increased headspeed for stunting vs. hover. You can also set one speed position to disable the govenor, if desired.

Thirdly, you can use yet another channel to manually inhibit the GV-1 (I do this on my gear
switch.) so that you can drop it out at will. I may not keep this, but it makes me feel better while the GV-1 is still "new" to me, and it also lets you drop back to your curves and make sure that they are still OK.

RE throttle hold, if the hold position is below 15% and you have the GV-1 setup to drop out at low throttle, it'll let go instantly. If you don't have this setup, then you may need to find a way to mix to the on/off channel on the GV-1 . . . . not sure how/if that would work . . .

So, from what I see in your message, I would suggest:

Use one channel other than throttle (flight mode),
to set your speeds. You can consider a flight mode with the GV-1 inhibited if you need.

Set the GV-1 to drop off at low throttle, and that way when you land or hit hold, it will release, and subsequently reengage when you restore power.

Don't worry about manual inhibit if you don't have a free channel. If the GV-1 loses the tach signal, it drops out anyway. Unless the processor has a total heart attack, it should always be able to "failsafe" and pass your RX throttle signal through directly to the servo.

I hope this helps,

- Tim
06-30-2002 Over year old.
 
 
metalman
Senior Heliman
Location: ada, okla.

GV-1

About the only thing to add to Tim's reply is to activate STSW [ stick switched ] on the GV-1 amp. This will enable thl/hld to override any other commands and drop the GV-1 out when the throttle stick is lowered below 15% and in thl/hld. If you are limited to using your idle up switch for speed control and want the GV-1 off in any particular switch position, just set the RPM at the amp to 999 and the GV-1 will disengage.
I think after you get a GV-1 and get used to using it, you'll love it.
Jim
06-30-2002 Over year old.
 
 
Kurt64
Veteran
Location: Salladasburg, PA

I get the general idea of what you guys are saying, but it is tougher since I dont have one in front of me to look at. Will the magnet work when used with an alluminum fan since the manual (downloaded from Futaba) recommends to keep it away from metal? I think I read that correctly and I dont imagine that there would be any problem, but I just wanted to make sure.
Do you think that the gov is a worthwhile purchase for my skill level?
Also, what servo will work well with the GV-1?
06-30-2002 Over year old.
 
 
crash-
Veteran
Location: Ca

the magnet will work when used with an alluminum fan,
for the servo for the throttle just get a good bb servo.
I am using a futaba 3001 on the rappy works ok.
Set a throttle curve in your radio if gv1 fails
you still have a back up curve.
when I flip throttle hold switch it disable the govenor
My set up is in normal gv1 is not used, when I flip idle up switch enable the govenor.
I hate fliping switches all my flight modes are set up
to my idle up switch
I use the K.I.S.S. program
KEEP
IT
SIMPLE
STUPID

BURN MORE FUEL
06-30-2002 Over year old.
 
 
metalman
Senior Heliman
Location: ada, okla.

GV-1

The magnet nor the pickup will be affected by the aluminum fan as it [ the fan ] is nonferris metal. As for the servo, most any servo that is heli rated is fine. I use 9202 [ Futaba ] only because I have them. Don't use servos that have the pot mounted directly to the output gear shart, i.e., 3004's [ Futaba ] etc. They don't do as well in the high frequency vibration environment of a heli. Also, fast servos don't seem to make any difference in GV-1 performance.
As to whether you need one or not, of course not. But the GV-1 will take a lot of the pitch/throttle curve set up hassles out of the loop and let you fly instead of fiddling.
Jim
06-30-2002 Over year old.
 
 
Kurt64
Veteran
Location: Salladasburg, PA

Quote 
the GV-1 will take a lot of the pitch/throttle curve set up hassles out of the loop and let you fly instead of fiddling.


That is the main reason I want one....to stop the endless fiddling. I have all 3 curves set up pretty well, but I would rather hold a constant head speed no matter what. It will also help with my unintentional occasional stick banging.
06-30-2002 Over year old.
 
 
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Radio - Servo - Gyro - Gov - Batt > GV-1...How to hook up and does it really help?
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