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Radio - Servo - Gyro - Gov - Batt > GV-1 Futaba 9Z. Need help!
 
 
spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum		Hi everybody,

last week,I put a gv-1 governor on my raptor30v2. Because I am not very familiar with Futaba's 9Z programming, I have not activated any mixes in the transmitter. I do not have idle1, idle2 etc. I have only "hold" and "throtle cut". Until now, I am flying only in "normal" mode. GV-1 is connected as manual says, with one of the simplest way (example 4 in governor's manual (2potitions on/off switch)). I have connected the AUX (on/off) governor's wire, in the only free channel of my receiver, which is activated by a 2position switch from the transmitter. In governor's menu, I have made StSw INH (stick operation setting), so that I don't have governor's OFF state, when the stick is in the lowest position. I have put the right gear ratio (9.56 for Raptor30v2), and I have selected rS2 speed setting 1550 rotor turns (rS1 and rS3 are disabled because AUX(rpm)wire is not connected). While the helicopter is in idle condition, I begin to move the throtle-collective stick up to 1/3 of it's way (about 30%), and I activate the covernor with the selected switch. I hear that the engine spins up more certain revs and after that remains constant. All good up to this point. I take off the helicopter and my revs are constants without any fluctuation even when I go up and down. I tried to land the helicopter with the governor active and I observed the following. While the helicopter touch the ground had still constant turns, but as soon as I began to move the stick in a lower point in order to decrease the pitch, engine began spin up a lot more turns. It seems like the governor cannot manage that time the turns of the engine. Regularly, I supposed that the turns must remain the same, independent with pitch input. Thus, I am forced to deactivate the governor in order to fall down the revs in the regular level. Any idea what could be wrong? How can i fix this?

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
10-30-2009 01:27 PM
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Peefor
Veteran
Location: St Albans UK

My Posts This: Topic  Forum		It could be that your GV1 is dropping out (switching off) in relation to the throttle stick position. The throttle is then reverting to the throttle curve which is set higher.

You can reset the position of the throttle stick where the GV1 becomes not active, or lower the throttle curve and see if that has the desired effect.

In my experience the 30 needs almost to run flat-out anyway, so the GV1 is expensive extra weight.

Pete
10-30-2009 06:01 PM
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Dr.Ben
rrProfessor
Location: Richmond, VA, USA

My Posts This: Topic  Forum		Spiros,

Humor me and set it up like this : http://www.futaba-rc.com/team/team-tip-001.html .

See if it works correctly using those steps, and then we can adapt it as needed to what you're doing now.

Ben Minor

Representing
MRC Hirobo Helicopters and Team Futaba for Radios
Morgan Fuels
OS Engines
10-30-2009 07:08 PM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum
Quote 
It could be that your GV1 is dropping out (switching off) in relation to the throttle stick position. The throttle is then reverting to the throttle curve which is set higher.

Hi Pete, i have already done this. As i wrote before "I have made StSw INH (stick operation setting), so that I don't have governor's OFF state, when the stick is in the lowest position."

Quote 
or lower the throttle curve and see if that has the desired effect.

The throtle curve is already lower because as i wrote "While the helicopter touch the ground had still constant turns, but as soon as I began to move the stick in a lower point in order to decrease the pitch, engine began spin up a lot more turns. It seems like the governor cannot manage that time the turns of the engine. I am forced to deactivate the governor in order to fall down the revs in the regular level." I mean that when deactivate the governor via the switch revs fall down to lower level, so the throtle curve is lower at this point.

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
10-30-2009 07:21 PM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum		Hi Ben,

thank you for your reply, but i cannot using exactly those steps because i have only one availiable slot in my receiver. There is no room for the governor's AUX (rpm) lead...

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
10-30-2009 07:40 PM
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fritzthecat
Key Veteran
Location: Virginia Beach, VA

My Posts This: Topic  Forum		Unplug the On/Off lead.
Plug in the Aux (RPM) lead.
Set one rpm to 999. This will turn the GV off.
Set the other rpm(s) to your desired rpm.

Go to SWCd and check if the GV turns on/off when you want it to.
Also try the SWPt setting INH and On/Off to see if it actually works at low stick.


Fritz


'Send Money, Women and Guns!'
10-30-2009 08:35 PM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum
Quote 
In my experience the 30 needs almost to run flat-out anyway, so the GV1 is expensive extra weight.

Pete,

I am starting to believe this...

I forgot to thank you for your reply in my previous post.
I am really sorry.

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
10-30-2009 10:25 PM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum		Hi Fritz,

I 'll try it as soon as possible. This technique is completely new for me and isn't reported in governor's manual. I 'll be back with good or bad news..

Thank you for your reply

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
10-30-2009 10:34 PM
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Peefor
Veteran
Location: St Albans UK

My Posts This: Topic  Forum		In setting up the GV1 with the 9Z I always used the method advised by Modtron, which was an offset mix, and used just the one wire like Fritz....but I didn't think that was the question.

Pete
10-31-2009 12:11 AM
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fritzthecat
Key Veteran
Location: Virginia Beach, VA

My Posts This: Topic  Forum		One more thing. If you disable SWPt then Throttle HOLD will NOT turn off the GV and the engine will continue at high rpm.
You need to make a P-Mix activated by the Trottle HOLD switch that turns off the GV.

Fritz


'Send Money, Women and Guns!'
10-31-2009 06:20 PM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum
Quote 
In setting up the GV1 with the 9Z I always used the method advised by Modtron, which was an offset mix, and used just the one wire like Fritz....but I didn't think that was the question.

Pete,

can you tell me what is the Modtron's method? Is there any step by step guide? The question was, why the GV-1 cannot handle engine's rpm's when i am trying to move the collective to lower position than 40%, even when GV-1 is activated.

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
11-03-2009 09:12 AM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum
Quote 
Unplug the On/Off lead.
Plug in the Aux (RPM) lead.
Set one rpm to 999. This will turn the GV off.
Set the other rpm(s) to your desired rpm.

Go to SWCd and check if the GV turns on/off when you want it to.
Also try the SWPt setting INH and On/Off to see if it actually works at low stick.

Fritz,

with your method, everything works just fine!
I left the SWPt setting to Off. Can i use this method on a 3p switch?

Quote 
You need to make a P-Mix activated by the Trottle HOLD switch that turns off the GV.

Can you tell me how this is done or is there any step by step guide because i am not familiar with the beast!

Thank you for everything

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
11-03-2009 09:22 AM
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Peefor
Veteran
Location: St Albans UK

My Posts This: Topic  Forum
Quote 
can you tell me what is the Modtron's method

The full how, why, and wherefores are shown here.
http://www.littlerotors.com/article...2002/index.aspx

In essence you set up an offset mix which is always on. Mixing in
-100% is off and +100% is your highest selected headspeed. In the setup you start with your highest headspeed first, so when +100% is selected in the TX, you alter the readout on the GV1 to show what you want. All other speeds are then a proportion of that.

The advantage is that you can mix in any proportion of percentage to obtain any lower speed that you fancy, providing you have enough switches. If you want the Gv1 off, then just mix in -100%, for example in Throttle Hold.

Pete
11-03-2009 11:58 AM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum
Quote 
The full how, why, and wherefores are shown here.
http://www.littlerotors.com/article...2002/index.aspx

Very very interesting article!! But in order to I make it, I think that I must find another free slot on my receiver...

I will try to make the mix for throttle hold.

Thank's for your reply

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
11-03-2009 07:32 PM
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Peefor
Veteran
Location: St Albans UK

My Posts This: Topic  Forum		The point of the article is that it shows how to connect with only one lead. You do not need the on/off lead. If you need the GV1 switched off you mix in -100%...cunning eh.

Pete
11-03-2009 08:40 PM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum		Ohhhh!!! I 'll go immediately for programming! But I'll be waiting for calm weather (windy-rainy days this week here) in order to make the test!! I'll be back soon.

Thank you Pete

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
11-03-2009 09:29 PM
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Peefor
Veteran
Location: St Albans UK

My Posts This: Topic  Forum		Good luck with the programming. . If you need any exact details for the 9Z, I still have mine set-up as it was used with the GV1.

I picked up the 9Z today, first time for ages. Nearly strained my shoulder having (quickly) got used to the 12Z.

Pete
11-03-2009 11:09 PM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum		Hi all,

Finally I made it!! Everything programmed and everything is ok.

Pete,

I really don't know if I need any details, but if you want PM me any details that you find usefull for a 9Z newbie, like me.

Thank you again.

Thank you all for your replies.

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
11-07-2009 06:18 PM
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modtron
Veteran
Location: Oxford. UK

My Posts This: Topic  Forum		Spiros,

The method used in the article was shown to me by the Hirobo/Futaba factory flyers from Japan.

As they were making good use of the GV-1 at the time, it seamed a good system to follow.

Glad you got is sorted out in the end.

modtron
Oxford UK
11-07-2009 08:24 PM
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spiacro
Heliman
Location: Athens, Greece

My Posts This: Topic  Forum		Hi modtron,

yes, it finally worked.

Thank you.

Spiros

Raptor 30V2 TT39 Futaba 401 Futaba 9Z
11-09-2009 09:01 AM
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Radio - Servo - Gyro - Gov - Batt > GV-1 Futaba 9Z. Need help!
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