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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › /throttle curve help
02-11-2006 05:35 AM  12 years agoPost 1
FenderBean

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Fort Hood TX

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Hey everyone, I have this problem for yeas and since i cant understand it i will ask. I set my throttle up with a 10% low stick 25% 50% 75% 100% throttle curve for normal hover, but its always to much throttle after i fly it and adjust it the curve looks like this
10% 20% 40% 60% 80%..........is this from have to much throw or something seems like the throttle is moving slower than the pitch so im not getting the power i need or something.... I run a gov, but i always back it up and hedck i just want to learn the art


its still linear curve just on the lower end of the stick, how do i stretch it out were i can get closer to 10% 25% 50% 75% 100%
when i set it like this the throttle goes from full open to idle and then with trim completely off

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02-11-2006 07:50 AM  12 years agoPost 2
Gearhead

rrMaster

Vt

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Ok, go to Rick's site (see link),,, once at Rick's in the column on the left scroll down and click on "tips", in tips click on "setting up your throttle", read it, read it twice if needed LOL, it will help,,,

if that's not your problem reply back and tell us..

http://www.rcheli.com/

Jim

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02-11-2006 05:06 PM  12 years agoPost 3
FenderBean

rrElite Veteran

Fort Hood TX

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you kow i really feel like a newb, but im not, i just want to get a few bugs that i havent been able to over come.....I want to show off for the century rep we have here hehe ...........

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02-11-2006 05:15 PM  12 years agoPost 4
FenderBean

rrElite Veteran

Fort Hood TX

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you know I read the setup tips and I know what hes saying..........i know that having the throttle curve not linear makes it sluggish or faster in certain areas............I do the 90 angles and stuff thats kinda or should be a know fact to all heli flyers.......i just cant ever get the barrel of carb to match........the curve no matter what I try.......my pitch curves are linear and stuff there just to short, i need to know how to stretch them out i guess..........how do u get them across the hold stick or throttle curve range, if that makes since

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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › /throttle curve help
02-11-2006 06:19 PM  12 years ago •• Post 5 ••
SteveH

rrProfessor

Texas

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FenderBean,

I'm not too shure what you are saying, but from what you said in your first post in the thread, it sounds to me like the throttle curve may be fine, but you may not have enough pitch at the top.

When I set up a heli, I set the hover pitch where I want it, and then adjust the throttle curve for the rotor RPM I want. Then with 100% throttle on the climb out, I adjust the top end pitch to maintain that RPM.

The government cannot give you anything without first taking it from someone else.

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02-11-2006 06:24 PM  12 years agoPost 6
Buzzin Brian

rrProfessor

College Station, Texas

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I do it much like Steve said. But I also make sure I use a throttle servo that is fast enough to be a little ahead of the pitch curve. That helps out a lot when it comes to useing a governor.

Build it, fly it, crash it. Repeat as often as needed.

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02-11-2006 07:09 PM  12 years agoPost 7
Gearhead

rrMaster

Vt

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I'll try to make this easy,,,

the ball on your throttle's servo arm may be to far out, ideally you want the carb arm ball and throttle servo arm ball to have the same leverage rate, so if the ball on your servo arm is 12mm out from center screw you will want the ball on the carb's arm the same distance (12mm), same leverage means linear travel,,,, same speed too,,, it is the linear travel you want, you want the carb arm to move the same speed and distance as the servo arm or as close as you can possibly get the 2 to move, or as Brian said you will want the servo a little faster (see below),,,

and make sure your throttle's ATV (servo end points) are set as close to 100% as possible !!

note, "hole/ball distance from center screw",,, usually the holes in most all servo arms do not exactly match the holes in most stock carb arms, that means 1 arm/ball will always have a higher leverage rate (more travel) and the other will have a lower leverage rate (less travel), so at that~ always make the servo's ball have the higher rate, because if the ball on the servo arm has the lower leverage rate your carb may not fully open, then you MAY need to raise your throttle's ATV (servo end points) higher than 100%,,, so keep them as close as you can to linear with the servo ball having the higher leverage,,,

so look at all the servo arms you have, and find the one with it's holes closest to the holes on your carb's arm, try to get it down to within a 1/2mm !!

(there are aluminum carb arms you can buy to match your servo arm)

Jim

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