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HomeAircraftHelicopterMain Discussion › Throttle hold........weird
03-03-2008 12:39 PM  10 years agoPost 1
flying buffalo

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Darwin, NT, Australia

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Hi all, Hoping someone can help. I have a 9c super futaba Tx. Flying a TT Titan 50 with Futaba GV-1 govenor. Wanting to start practicing autos using throttle hold. Now with heli on the ground and off,
all settings work fine, either in normal mode or idleup 1. But once I start engine and get into a hoover (This is while Gov. is off) the throttle hold doesnt work, it apperas that the engine rpm actually increases slightly.
With engine running at positions slightly above idle the throttle hold works but once I start to hoover the throttle hold doesnt cut in when activated, yet with engine off it does work as I watch the throttle linkage
move back to idle point. It appears that once I hoover and the throttle stick is arround mid-stick position the throttle hold function doesnt work, it actually raises the engine rpm slightly...
very confused as like I said as heli sits on the ground and I move throttle stick on Tx up slightly the throttle hold does work but once I hoover it doesnt. I have GV-1 activated by the F switch
(on/off) not by throttle stick position so that shouldnt be the problem. Its just very weird, everything moves correctly when throttle stick is below a certain point but once its above that(arround mid-stick)
throttle hold just doesnt cut in, it actually increases engine rpm slightly.........Help

Cheers Robert

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03-03-2008 12:41 PM  10 years agoPost 2
MattJen

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UK

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Have you got throttle hold activated ?

or is it still INH when you look on the menu

the way you can test it, is to go to ADVANCED in the menue and look at throttle curve, click into idle up 1 or 2 and then click the the throttle hold switch, HOLD should apear in the display

Matt

All The Best

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03-03-2008 12:49 PM  10 years agoPost 3
MattJen

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UK

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on My FF9 super

when i click on advanced, i got to throttle hold

my setting for my Venture ( which uses a GV1) is as follows

Mix is off (assigned to switch g)
POSI 4%

RUD OFF SET
MIX INH
OFF SET 0%

All The Best

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03-03-2008 12:50 PM  10 years agoPost 4
jbiter

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Sebring, FL

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Are you sure the gov is off? Sounds like you may need to reverse the F sw function. Check the gov state in the gov menus.

Jeff

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03-03-2008 01:11 PM  10 years agoPost 5
flying buffalo

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Darwin, NT, Australia

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Yes THold is activated and Gov switch is set in the right direction. Ive been flying for 12 months with this Gov and it works fine, but only now have decided to try autos.

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03-03-2008 01:19 PM  10 years agoPost 6
MattJen

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UK

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ok

Maybe try this,

In Governer channel in the advanced menu

to cut the governer for throttle hold is it set to Chan7 ?

it will be on page 2 of the governer menue

Mine is ( for info)

MIX - ACT
CUT-CH CHAN 7
DIR + LIMIT

You may not have it set up in the radio for throttle hold, which is why when you activate hold the governer doesnt know what to do which is why you may get an RPM increase...

Matt

All The Best

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03-03-2008 01:20 PM  10 years agoPost 7
dazzaster

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right next door to hell

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switch on press mode/page button untill your in advance heli menu.
goto thr-hold and select
make sure that mix is not in hibited if it is then just use the cursor to select mix and rotate the jog dial button till it says off or on while on that scrren if you use your throttle hold switch you will see the mix switch from off to on as you move the throttle hold switch.

p.s its good practice and a nice safety featureif you use throtle hold when starting your engine to ensure it dont start in hi stick
Darren

A.K.A 509

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03-03-2008 01:23 PM  10 years agoPost 8
MattJen

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UK

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[quote]Yes THold is activated and Gov switch is set in the right direction. Ive been flying for 12 months with this Gov and it works fine, but only now have decided to try autos.

DAZASTER - read the post, it has been answered by Buffalo already, it is activated!!!!

and in the second post i already said this
Have you got throttle hold activated ?
or is it still INH when you look on the menu
the way you can test it, is to go to ADVANCED in the menue and look at throttle curve, click into idle up 1 or 2 and then click the the throttle hold switch, HOLD should apear in the display

try and keep up

Matt

All The Best

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03-03-2008 01:25 PM  10 years agoPost 9
flying buffalo

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Darwin, NT, Australia

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Hi matt, heres my settings

MIX-ACT
CUT CH-CH8
DIR- +LIMIT

CUT SW- F

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03-03-2008 01:29 PM  10 years agoPost 10
MattJen

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UK

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It looks like it could be cos the channel is wrong on chan cut,

Matt

All The Best

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03-03-2008 01:35 PM  10 years agoPost 11
dazzaster

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right next door to hell

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have you set the fail safe in the govenor? if so set it to off

A.K.A 509

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03-03-2008 01:38 PM  10 years agoPost 12
MattJen

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UK

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sorry forget my above comments, apologies if it is confusing you more...

my mistake, am looking at too many sub screens

disregard the above,

try this,

THROTTLE HOLD IS G

IN GOVERNER - MY CUT CH IS CHAN 7 Which is assigned to switch C

on yours it is channel 8 which should be assigned to switch F

So go into your AUX channel and ensure chan 8 is switch F

Matt

All The Best

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03-03-2008 01:44 PM  10 years agoPost 13
flying buffalo

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Darwin, NT, Australia

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At the moment my Switch F is assigned to channel 5, which turns the GOV on or off manually.

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03-03-2008 01:53 PM  10 years agoPost 14
MattJen

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UK

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Ok

I misread your post, i thought you had channel 8 as your throttle cut channel ( SW f)

What switch is assigned to throttle cut ? is it switch C ?

If so, then your cut chan should be the same as throttle cut, ( what ever channel your switch C is set to)

On my FF9 Super,

in Governer, my MIX is Active, my cut Chanel is chan 7 which is assinged in AUX chan menue to switch C ( which is my throttle cut)

Matt

All The Best

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03-03-2008 02:02 PM  10 years agoPost 15
dazzaster

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right next door to hell

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futaba say the following:
If you are not using the stick switching function, then the only way for the governor to know you want it off in throttle hold are:

a) Put the on/off switch on your throttle hold switch (not recommended as you have no way to turn the governor off without being in throttle hold).

b) Turn both switches off together in flight whenever you go into hold.

c) Using a 9C radio, tell the 9C's software that channel 8 is your on/off in the governor programming. The software will then automatically turn off your governor when you go to throttle hold. Basically, the radio is doing option D for you; or

d) Create TWO mixes within your 9z's throttle hold condition (8-channel users: in your case, both mixes are assigned to the throttle hold switch) which are both:

master = offset
slave = ch 8 (the on/off channel)
percent = 100%
switch (same as throttle hold in the hold position)

(Why do you need two mixes? A 100% mix moves the servo from center to one extreme or, in this case, from one extreme—ON, to center; the second mix moves it from center to the other extreme—OFF.)

A.K.A 509

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03-03-2008 02:03 PM  10 years agoPost 16
flying buffalo

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Darwin, NT, Australia

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No you are OK matt, you havent miss read my post, my screen does read
MIX-ACT
CUT CH-CH8
DIR- +LIMIT

CUT SW- F

Going into AUX CHANNEll it reads this

CH5 SW-F
CH7 SW-C
CH8 VRB..............Could this be where the problem is? I dont use the VRB knob at all.

My switch C is my 3 pre-set head speeds
My throttle hold is assigned to switch G

Thanks for your help matt

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03-03-2008 02:20 PM  10 years agoPost 17
flying buffalo

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Darwin, NT, Australia

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So Matt and Dazz, looks like I need to assign CH8 to switch F, does that make sense. cheers

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03-03-2008 02:22 PM  10 years agoPost 18
MattJen

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UK

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yes

chan 8 needs to be assigned to sw F which is your governer on off....

I have a setup i was sent i have copied and pasted into this thread,
what is slightly confusing is you have your switch C as idle ups, instead of throttle cut,

but each to their own...

Matt

All The Best

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03-03-2008 02:24 PM  10 years agoPost 19
MattJen

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UK

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THIS IS WHAT I WAS SENT A WHILE AGO, SO I CANNOT TAKE CREDIT FOR IT, I FOUND IT HELPFUL INFO....

YOUR CHANNELS ARE DIFFERENT, IN THE ON OFF WIRE IS CHANNEL 8

Receiver Connections:

1) Aux 0n/Off wire = to channel 7
2) Aux rpm wire = to channel 8

9CHP Settings:

1) Aux menu
a)chan 7 = F (gov on/off)
b)chan 8 = E (Norm, idle1, idle2 rpms)

2) Gov menu
a)30% = 1650 rpm
b)50% = 1750 rpm
c)80% = 1900 rpm
d)SW = E
e)page 2 Cut Ch = 7

The Setup:

1) Connect the GV1 Aux On/Off wire to Chan 7 on the RX.

2) Connect the GV1 Aux Rpm wire to Chan 8 on the RX.

3) Connect the GV1 Throttle wire to Chan 3 on the RX.

4) Connect the Throttle servo wire to the GV1 Throttle Input.

5) Connect the Sensor to the GV1 Sensor Input.

6) On the 9C, go to the Aux Menu and assign Chan 7 to "F". This will be the manual on/off to turn the GV1 ON or OFF. This is ideal for troubleshooting or tuning your engine.

7) On the 9C, go to the Aux Menu and assign Chan 8 to "E". This will be for setting various rpms via the flight mode switch "E".

8) On the 9C, go to the Gov Menu. TEMPORARILY set the values as follows: UP = 0%; CNTR = 50%; Down = 100%. I will explain this value later.

9) On the 9C, verify that your End Points for chan 7 & 8 are 100% / 100%. Chan 3 end point should be close to 100% / 100% (no less then 85% / 85%) and equal. It is important that the throttle chan end point values are as mention or the GV1 will not function properly.

10) Turn on the radio then the GV1

11) On the 9C, set the throttle trim to low.

12) On the 9C, Throttle Curve menu, set the NORM values for a straight line, 0% 25% 50% 75% 100%. Also activate idle up 1 and 2 and set the curves for a "V" or a "U" curve.

13) On the 9C activate the Throttle Hold function.

14) On the GV1, activate the SWPt. This function changes the direction of the ON/OFF switch.

15) On the GV1, activate the StSw. This function uses the radio's throttle stick to turn on or off the GV1. Roughly around 25% stick.

16) Lets calibrate the GV1 and the radio's stick position. On the GV1 scroll to the LMT menu. But before we begin, lets understand what is going on here. At half stick the heli is in the ground, hence 0 degrees of pitch.

So from low throttle stick position to half stick nothing happens. In other words, Engine Idle in normal mode happens from low stick position to almost half stick position. We need to instruct the GV1 that the idle position will be roughly around 30% stick position.

Go to the 9C throttle curve menu, NORM, move the throttle stick so that the arrows on the #2 and #3 are both highlighted. Leave the stick in this position. Also, make sure that the throttle trim is all the way down.

On the GV1 activate the LMT menu to accept the Lmt Idle position. The GV1 will now flash Lmt High, move the throttle stick to the full high position and activate the GV1, the GV1 will now flash Lmt Stop, move the throttle stick to full low position.

Now lets verify that the GV1 comes on when it should.

On the GV1, go to the SWCd menu. Move the throttle stick slowly until the SWCd shows ON. Now look at the 9C throttle menu and see where the stick position is on the graph. The stick position should around 30% when the GV1 SWCd menu switches from off to on. If not, adjust the throttle stick position until you obtain this approximate value.

17) Now lets check and see when the GV1 goes on. On the GV1 go to the SWCd menu. Move the throttle stick from low (GV1 shows OFF) to half stick (GV1 shows ON). Now toggle switch "F". The GV1 SWCd menu should show OFF. Toggle switch "F" back, GV1 SWCd shows ON. Toggle switch "E" to idle up 1, GV1 SWCd should show ON. Toggle switch "F", GV1 should show OFF. Toggle switch "F" back, GV1 SWCd should show ON. Toggle the Throttle hold switch, GV1 SWCd should show OFF.

OK you get the picture. At Idle UP 1 & 2 the GV1 SWCd should be on regardless of stick position. If Throttle Hold is activated then the GV1 SWCd should show OFF. If the 9C switch "F" is activated then the GV1 SWCd should show OFF. If the throttle stick is at low stick position then the GV1 SWCd should show OFF.

All The Best

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03-03-2008 02:28 PM  10 years agoPost 20
flying buffalo

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Darwin, NT, Australia

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Thanks heaps guys for the help, If we were closer I would buy you a beer.......or a bourban

Thanks again Robert

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HomeAircraftHelicopterMain Discussion › Throttle hold........weird
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