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New & Emerging R/C Helicopters > century gl450

tim225
Senior Heliman
Location: N Wales (UK)

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Just bought one of these, cracking little thing and looks good too,A word of warning to anyone who has one though,make sure you check that ALL the bolts/screws have been thread locked, as only about 20% of mine were, indeed two bolts were hanging out they were so loose!
The only other problem is the manual which is rubbish it gives esc settings but not how to change /alter them. Other than that it is very stable in the hover, I haven't had chance to do anything else with it, but would like to set it up on the pcm9xii, not sure how,due to the dire set up instructions. If anyone has any info on how to do that I would be more than grateful.
Thanks
Tim

Vario Bell 230 Gasser,Vario Benzin Trainer,T-Rex 600N, Hirobo Shuttle Plus,Century GL450SE

05-01-2008 Over year old.

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coolice
Key Veteran
Location: Northamptonshire, England

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Hey,

I'm glad you liek the little GL450SE, I to adore mine and it goes very well indeed and straight from the box to!
On mine I have changed 2 things to improve matters :

1. The tail servo, went from a Futaba S3153 to a Futaba S9257 which is THE best tail servo to go for if your after maximum hold. It's not cheap but combined with the stock gyro works very well.

2. I have fitted harder head dampers to mine to make it a little more snappy in flight, a cheap upgrade if your into advanced flying.

With my own I was lucky in that all my screws did appear to be loctited, I only lost one from the tail boom support clamp which made me check all the others and surprisingly all the main frame screws were loctited. Of course with any ARTF model you are advised to check all the screws as mistakes/omissions can be made.

With the ESC here is the instructions for setting it up :

http://www.hkgulang.com/script/en_N...13155834312.RAR

I have tried to alter mine but failed miserably

Have not had another go yet as to be honest apart from the slow start option not being turned on, the rest of the settings work great.

I use a JR 9XII to fly my model with and so will help as much as I can. I have basically setup the model with +-11 degree's of pitch, with 0 centre stick and adjusted my pitch curves from there.

As a rough guide I set mine on the bench as follows (low, mid, high) & have not had to change them :

Normal Mode : -3 ~ 0 ~ +10/11
Idle Up 1 : -6 ~ 0 ~ +10/11
Idle Up 2 : -10/11 ~ 0 +10/11

You will find that the little motor will pull 11 degree's of pitch quite well but can be loaded, with good collective management you can use this to your advantage for aggresive flight.

Throttle curves are P-L,1,2,3,4,5,P-H :

Normal : 0 ~ 41.5 ~ 74 ~ 80 ~ INH ~ INH ~ 100
Idle Up 1 : 78 ~ INH ~ INH ~ 88 ~ INH ~ INH ~ 100
Idle Up 2 : 100 ~ INH ~ INH ~ 90 ~ INH ~ INH ~ 100

Here is a video of me flying mine at quite a small indoor hall earlier in the year, the model is moved about even more aggresively outside

http://uk.youtube.com/watch?v=uU7AYKx-7RQ

Any questions just ask matey.
.

Ian Contessa
Team Robbe SchluterUK

05-01-2008 Over year old.

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tim225
Senior Heliman
Location: N Wales (UK)

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Thanks for the info Ian ,very helpful the problem I am having is that for some reason the reciever does not want to power up my motor if I use the pcm 9xii? Tx is set to ppm ,on the correct channel but motor does not start.If I return to the Tx that came with it it's fine.
Tim

Vario Bell 230 Gasser,Vario Benzin Trainer,T-Rex 600N, Hirobo Shuttle Plus,Century GL450SE

05-01-2008 Over year old.

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coolice
Key Veteran
Location: Northamptonshire, England

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Hey Tim,

No worries your welcome matey, glad to help and enjoy doing so.

Ok, 2 things which may be causing the ESC not to arm itself.

1. Some ESC's require a little more ATV on some transmitters to arm/initialise than others. A case in point is the Quarks I fly on some of my models, to arm they need to see (as does the GL) a low stick throttle position as you know. But the low stick position on the JR 9XII may not be going low enough to arm.

A way to see if this is the case is to slowly increase the ATV value on the low stick side of the throttle channel until the ESC arms hopefully and plays it's beeps.
If say you get to 12/130% and still no arming takes place then we can try option 2.....

2. The throttle channel in the 9XII may just need reversing, in this case low stick may be showing full power after it goes through the receiver and onto the ESC.
Just looking at my Tx. on how mines set it is normal (not reversed) and so I am inclined to go with option 1 which may be your problem.

Do all the other servo's work ok using the stock receiver and the 9XII? If they do then I am sure it's just the ATV or channel reverse which is giving you grief.

While messing around like this with the model I'd either remove the main blades or slacken the motor off and move the pinion away from the main gear, so that if the motor starts it's not going to be in a position to give you a whack.

Let me know what you find fixes your problem.
.

Ian Contessa
Team Robbe SchluterUK

05-01-2008 Over year old.

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tim225
Senior Heliman
Location: N Wales (UK)

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Hi Ian thanks for your reply,I have tried all of the above to no avail I'm afraid, I tried to use the throttle set up as per the instructions, as well as your advice but do not get the correct beeps when I move the throttle to the low position?? and thus get no response from the motor

Vario Bell 230 Gasser,Vario Benzin Trainer,T-Rex 600N, Hirobo Shuttle Plus,Century GL450SE

05-02-2008 Over year old.

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coolice
Key Veteran
Location: Northamptonshire, England

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Hey Tim,

Hmmm, thats a strange one. I've not tried linking a JR transmitter to the stock receiver and so can not comment on problems with doing so.

The next option and probably the best is to fit a JR SPCM receiver, the small 7 channel R77 synthesised receiver is the best one to go for. This is what I am using in my GL along with a Turbo Antenna which cuts down on having a long aerial.
This option kills 2 birds with one stone :

1. Your transmitter will work 100% with the model &
2. You will minimise any interference/glitches you could have while flying. I've not had any glitches on my model and on a previous micro it was the addition of the antenna which made the difference.

You could call CenturyUK direct and ask them if anyone else to their knowledge has used a JR Tx. with the stock GL receiver.
They may put you back onto me as I fly JR radios, but they may know others to.
.

Ian Contessa
Team Robbe SchluterUK

05-02-2008 Over year old.

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tim225
Senior Heliman
Location: N Wales (UK)

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Hi Ian thanks again for your info, I have rung Century this morning and they are looking into it for me,I have spent so much on heli's this year

I was hoping not to have to buy anything else!
I will let you know the outcome.
Tim

Vario Bell 230 Gasser,Vario Benzin Trainer,T-Rex 600N, Hirobo Shuttle Plus,Century GL450SE

05-02-2008 Over year old.

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coolice
Key Veteran
Location: Northamptonshire, England

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Hey Tim,

That's no problem mate.

I know what you mean, wait till you've been in it a few more years with the money you spend

For me it's a real thrill to fly heli's, it can get stressful at times especially when things go worng but thats half the challenge.

You know where I am if you need help and my email address is below as well for a quicker response maybe.

I'll be interested to know what CenturyUK say as well as mine was supplied to me without Tx. or Rx. hence why I couldn't comment on how a mix would work out best.
I will no doubt chat to them again in the coming weeks, I always see what new toys I can grab to play with

Chat soon dude.
.

Ian Contessa
Team Robbe SchluterUK

05-02-2008 Over year old.

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trillian
New Heliman
Location: London, UK

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getting stock GL450 gyro into HH mode

I have a GL450 I bought second hand.

Right now, no matter I do it behaves as if the gyro is just in rate mode because it swings the tail to the right when I punch the throttle.

Not being familiar with this gyro I have no idea what's going on.

The red light is on solid, which if it was a gy401 I would expect that to mean it is in HH mode.

I am using a DX7 with the gear switch as the gyro gain but it doesn't seem to matter very much if the switch is up or down or if the red light o the gyro is on or off, so I don't know if it is in HH mode or for that matter if it even has an HH mode.

'Any ideas?

(currently using an el cheapo tower pro servo and will replace it as soon as the better faster one arrives, but having said that I have a 3DX 450 with a CSM gyro that holds fine with the same tower pro servo)

10-15-2009 05:16 PM

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coolice
Key Veteran
Location: Northamptonshire, England

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Hey,

I do not have my GL450 any more as I no longer fly for CenturyUK, but will try to help as best as I can.

As you say it seems like the gyro is not in heading hold mode then I would suggest we test this first.
With any gyro in HH mode if you swing the nose of the model left or right, the tail servo should move the tail to give an opposite command and keep this command in until the nose is swung back to it's original position. To test power up the model (select throttle hold to be safer

) and swing the nose/tail of the model and look at the tail servo, does your setup do this?

From what you've said about it swinging when giving full power it's giving me a clue that it might just be servo related. Basically the small 9g servo does not have the power to hold the tail command in to counteract the torque of the main rotors in a climb out.
Of course you also need to make sure there is no binding/tightness in the tail movement, but it's sounding like you're reaching the limits of the servo.

Definetly a better tail servo is a good upgrade, I went with a Futaba S9257 which although not cheap worked very well. Now, though with experience of Align models and parts a DS520 that has similar specs to the Futaba but is cheaper might be worth you looking at when you change.
.

Ian Contessa
Team Robbe SchluterUK

10-15-2009 10:32 PM

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trillian
New Heliman
Location: London, UK

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gl450 gyro setup

Thanks coolice.

Well, I was trusting a self-proclaimed expert that had set the heli up. But in having a look at the travel adjust and centering it is obvious first of all that not enough pitch was being allowed in both directions so basically at full whack the gyro was not allowed enough pitch at the tail rotor to full counteract the torque. I have set that up so that it is equal in both directions and adjusted the travel on the gyro so there's no binding.

That might just do it.

But you're probably right about the tail servo as well and that would definitely cause the same symptom by not being able to react fast enough.

I have a new servo on the way and I'll test MY gyro setup tomorrow

These little electric helis are just a lark for me as my real interest is in nitros and gassers. (getting Robbe Futura mechanics with 4 stroke conversion BTW, that should be interesting)

10-15-2009 10:45 PM

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New & Emerging R/C Helicopters > century gl450

coolice
Key Veteran
Location: Northamptonshire, England

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Hey Matey,

Your very welcome.
LOL, I know the true definition of "expert", and "ex" is a has been and a "s'pert" is a drip under pressure

I know this as I keep being reminded by my flying buddies

You're expert might be right in his setup line of thinking though to some degree, the transmitters ATV values do not control tail servo travel but pirouette rate.
The greater the ATV value the faster the tail will spin in relation to rudder stick commands, conversely the lower the ATV the slow the tail will piro through stick inputs.
If you confident in your piros you can test this out one day by reducing the rudders ATV for both directions down to maybe 35~45% and trying a piro, then putting it back up to 100%. Obviously be ready for the speed change.
To change the travel of the tail servo you use the adjusting pot on the gyro itself and/or a longer/shorter servo arm. If memory serves correct there are two pots on the Gulang gyro which like a GY401 adjust delay and travel.

You certainly wont regret fitting a better servo on the tail, the stock Gulang gyro was indeed very good I felt and held very well with the S9257.

I'm the same as yourself to some degree with these smaller machines, although I do like them as they are so cheap to repair and so I find myself trying new things on them.
At present I've skipped the 450 size model and have a Trex 250/500CF/600NSP and 700N, the latter is getting most of my time as the 700 flies so well and can power though the hardcore 3D with ease. My Turbine flying though adds a little extra excitement when I have one flying, I spent a lot of time with CenturyUK's Turbine Predator and done a lot of the initial testing which was fun.
.

Ian Contessa
Team Robbe SchluterUK

10-16-2009 12:08 PM

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New & Emerging R/C Helicopters > century gl450

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