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HomeAircraftHelicopterBeginners Corner › Dual rates and exponential rates
01-13-2009 11:15 PM  9 years agoPost 1
misfits0311

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Santa Clarita, CA - USA

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Can someone explain what these rates are/affect/mean? I am having a hard time grasping the concept here and don't want to sound like a dummy but I could use some seasoned mentoring. Thanks.

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01-13-2009 11:19 PM  9 years agoPost 2
A. Bundy

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Aurora,IL. 30W/SW of Chicago

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A dual rate is a linear line with less max throw at the lower rate setting.An exponential is a curving line usually set to make less travel at the initial stick movement and the curving upward until it reaches it's final max travel.It's used to make a heli not twitchy and still aggressive.

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01-13-2009 11:24 PM  9 years agoPost 3
A. Bundy

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Examples-
***************************
Dual rate
High-
1/2 stick 50%
Full stick 100%

Low-
1/2 stick 40%
Full stick 80%
****************************
Expo-
1/2 stick 25%
Full stick 100%

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01-13-2009 11:28 PM  9 years agoPost 4
misfits0311

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Now that makes a heck of a lot more sense. But how in the world do you know where to begin, trial and error?

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01-13-2009 11:29 PM  9 years agoPost 5
deafheliflyer

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Arizona

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hi
I dont use expo at all except 15% on rudder because I always accidently hit rudder while pushing on collective..

I like the feel of the sticks and my bird without Expo... Expo softens things up way too much for me.

To each his own

Crash-Prone and overcoming it!!!

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01-13-2009 11:30 PM  9 years agoPost 6
A. Bundy

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Yes.Soften the expo about 35% smoother on the cyclic and adjust to your liking from there.I never use expo on the rudder.

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01-13-2009 11:31 PM  9 years agoPost 7
misfits0311

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Santa Clarita, CA - USA

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Also, when would this be appropriate? i.e. what type of flying or maybe it is necessary for a certain manuever? Thanks.

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01-13-2009 11:36 PM  9 years agoPost 8
A. Bundy

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A newbie hovering would like more expo.I like a 25-30% smoother cyclic just to smooth things out in the precision stuff.

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01-14-2009 01:55 AM  9 years agoPost 9
JRjoe

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Jonesville , IN USA #1

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I'm a big fan of lots of expo on the rudder. 70 to 80% works good. You don't wanta be in the rudder when pumping collective.

Just my 2 cents.

You gotta play with it to find out what works for you.


JRjoe.....
Indoor plumbing??? No, we don't need that!!!

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01-14-2009 01:56 AM  9 years agoPost 10
JRjoe

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Jonesville , IN USA #1

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25 to 35% expo works well on the cyclic..


JRjoe.....
Indoor plumbing??? No, we don't need that!!!

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01-14-2009 01:59 AM  9 years agoPost 11
rcjon

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Macon, GA

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And to further confuse the issue, negative expo on a Futaba Radio is the same as positive expo on a JR. JR is backwards

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01-14-2009 02:20 AM  9 years agoPost 12
JRjoe

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Jonesville , IN USA #1

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And to further confuse the issue, negative expo on a Futaba Radio is the same as positive expo on a JR. JR is backwards
No Futaba is backwards....LOL


JRjoe.....
Indoor plumbing??? No, we don't need that!!!

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01-14-2009 01:45 PM  9 years agoPost 13
TDriver

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Portage IN

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25% to 30% works good for me .And when im helping a new guy out ill always set his dual rate to 60 or 65 . I dont know how many times ive watched guys try to fly on 100% rate and as soon as i turn it down everything smooths out ..

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01-14-2009 02:42 PM  9 years agoPost 14
Skarn

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Pasadena, MD

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And when im helping a new guy out ill always set his dual rate to 60 or 65 . I dont know how many times ive watched guys try to fly on 100% rate and as soon as i turn it down everything smooths out ..
But the problem with that is they don't get used to how it really does fly and if they NEED the extra movement to get out of an emergency, they won't have it.

I am a firm believer in 100% rates...you don't HAVE to push the stick all the way and when needed it will be there. The best reason though is so you don't have to "re-learn" how it flies all over again with 100% rates.....same with pitch curve. One should learn to fly with full linear pitch curve as soon as possible....again, so you don't have to re-learn how to fly with full negative collective.

Skarn

It's better to burn out than to fade away...

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01-14-2009 03:01 PM  9 years agoPost 15
TDriver

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Portage IN

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I am a firm believer in 100% rates...you don't HAVE to push the stick all the way and when needed it will be there. The best reason though is so you don't have to "re-learn" how it flies all over again with 100% rates.....same with pitch curve. One should learn to fly with full linear pitch curve as soon as possible....again, so you don't have to re-learn how to fly with full negative collective.
LOL try and tell a new guy not to push the stick all the way ..This has worked with about 10 guys . And they have no trouble moving it up little by little

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01-14-2009 04:59 PM  9 years agoPost 16
sonnyhad

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Holland,Mi

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TDriver,

Myself, being a new guy, I like your approach. Much easier on the pocket book as well. Then after you really know your(speaking of the new person) heli can really fly then adjust little by little. I think too many times when a new guy gets help, someone sets his radio up and doesn't tell him whats what! I know from experience, I still have a ton to learn but slowly, very slowly, I am learning!

Bald Pilots usually wear hats!

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01-14-2009 06:21 PM  9 years agoPost 17
JetFire

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The Golden STATE

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I am a firm believer in 100% rates...you don't HAVE to push the stick all the way and when needed it will be there.
Thats the way I prefer as well. But I wouldn't recommend it for your average beginner either. I look at it as training gear. Get off it as soon as you can for the reasons Skarn has already stated.


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DX8-2.4
Spartan/BL9088

-The ONLY way you fail is when you quit.-

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01-14-2009 09:42 PM  9 years agoPost 18
misfits0311

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Santa Clarita, CA - USA

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A lot of people have made comments regarding expo, but when would dual rates come in handy?

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01-15-2009 02:18 AM  9 years agoPost 19
GMPCOBRA

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oregon

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dual rates are there so help lower the control movements so your not overcompensating in any direction. i use it on cyclic only and as most of us new guys know it makes it alot more smooth to fly. alot of the small helis are way to quick for a beginner and the dual rates set up properly will slow it down and make it more controlable.
.
as for expo alot of people have it right on here just be aware that positive expo will slow it up around center stick where negitive expo will speed it up at center stick all depending whtch radio you have .

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01-16-2009 06:10 PM  9 years agoPost 20
Skarn

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Pasadena, MD

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LOL try and tell a new guy not to push the stick all the way ..This has worked with about 10 guys . And they have no trouble moving it up little by little
If the new guy starts right off the batt with full negative, there is no learning curve.

At my local flying field, they teach the newbies to fly with a linear 0,25,50,75,100 curve from day one just for that reason.

Both ways work....many ways work....I just think some are more optimal.

Skarn

It's better to burn out than to fade away...

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HomeAircraftHelicopterBeginners Corner › Dual rates and exponential rates
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