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MTA Hobbies . Model Rectifier Corp . PowerHelis

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Gasser Model RC Helicopters > XCell Gasser Graphite Setup
 
 
caiman
Heliman
Location: Monterrey México

Could anyone help me set up the throttle and pitch curves for this heli? what values are you guys using?

What should be the main rotor RPM for normal FF?

I think I remember reading that on gassers the throttle servo should be faster (or have a longer control horn for that matter) than the pitch servo, is that true?

Thanks.
06-21-2008 07:30 AM
 
 
xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Set your pitch curve linear, -10,0 mid stick,+10 It should be a straight line on your transmitter.. Now if your new to flying, after you get this setup, you can take some of the negative out, in your pitch curves,, so you don't slam it down on the ground,

As for the throttle curves,, you really need a tach, to get things right, but I'll give you the ones I have set up for one of mine,,,, Just remember these are just a starting point!!!!

L=0
1=8
2=16
3=23.5
4=43.0 Hover point for my setup, is between 3, and 4 closer to 4
5=58.0
H=100

Head Speed for the stock gas is,,,
Gear Ratio is 6.43:1,,,Target engine rpm from 11,500 to 12,500, Could be more depending on engine,,, Now this is for optiman output,,, I not saying you have to be in this range, Just where the engine will be putting out it's most H.P. and torque.....
6.43 x 1750 head speed = 11,252.5
6.43 x 1800 HS = 11,574
6.43 x 1850 HS = 11,895.5
6.43 x 1900 HS = 12,217
6.43 x 1950 HS = 12,538.5
I would not go much over this if your are in the beginner stage!!!


Now as far as the throttle servo goes, it's nice to have one that is the same speed as the collective, but if your just starting out, it won't matter much,, The faster servo is only if your doing aerobatics, or 3D with the machine, and a governor of some kind,,

But you do want to have it setup right,, linear,,, meaning at half stick your carb is half open, servo is centered, and they are both 90 degrees to each other,,
Hope this helps you out,, XGM/VGM

I would set it up for normal some where around 1600 to 1650 HS,, Then go from there,, You might need to raise it to fit your flying style,

John Crotts
www.soonerhelicamproductions.com
06-21-2008 03:55 PM
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caiman
Heliman
Location: Monterrey México

XCell Gasser

Thank you for your reply.

Do you think it would be ok to keep the S9202 servos on the collective and cyclic controls or should I change them to the 9252 digitals?
06-21-2008 05:42 PM
 
 
xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Well it all depends on your flying style,, if your just learning, and just hovering, with nice and easy circuits, then yes the 9202 are plenty strong enough to fly the heli,, but if your flying is good enough to do sport aerobatics, and 3D then I would go for JR 8311 on the collective, and cyclic.. The 9252 are good for CCPM where all three servos are working together,, but by them selfs,, I would use a differant servo,, the 9202 are just about the same,, XGM/VGM

John Crotts
www.soonerhelicamproductions.com
06-21-2008 05:49 PM
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caiman
Heliman
Location: Monterrey México

XCell Gasser

And what about using the S9203 for the tail with the GY401? do you think it would work ok, or should I buy the Hitec 6965HB?
06-21-2008 05:54 PM
 
 
xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

I would use the Hitec 6965 servo,, as there are people with good results allready,, XGM/VGM

John Crotts
www.soonerhelicamproductions.com
06-21-2008 06:03 PM
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Gasser Model RC Helicopters > XCell Gasser Graphite Setup
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