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HomeAircraftHelicopterHelicopter Main Discussion › Dual Rates and Expo How many use it?
04-23-2009 12:05 AM  9 years agoPost 1
RCHSF

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NC

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I have got the hang of tail-in, and some nose-in also.
And I was wanting to ask does expo, and dual rates help, or hurt.

Far as control I don't over control the heli, but was just wanting to know if their are other times expo, and dual rates can come in handy.

Seems learning to fly with softer sen around center could not hurt, as long as you have full throw, and more sen as the throw increase's.

Trex 450, Dx7 JR gyro, digital servos.

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04-23-2009 12:17 AM  9 years agoPost 2
duceduc

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Saitama-Ken, Japan

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I never have used it.

Duc S
Do It! Do It!™
AMA:REVOMIX
RCK:24005615-01

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04-23-2009 12:17 AM  9 years agoPost 3
Gearhead

rrMaster

Vt

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for acrobatics very few use 2 diff Dual Rates,, most don't because they want totally control of their Swash at any and all times,,,

now 2 diff Expo Rates I recommend..

Jim
Buzz Buzz Buzz

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04-23-2009 12:19 AM  9 years agoPost 4
chopperben1

rrApprentice

Ontario, Canada

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I don't use dual rates, but I use expo to make the heli's I fly and the heli's on my simulator "feel" identical in terms of stick movement. I find that this helps me to get a more connected feel between the simulator and the real helis.

I suppose expo can also make your heli less twitchy or more twitchy, but if that is not an issue, then no need to adjust for that.

- Ben

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04-23-2009 12:20 AM  9 years agoPost 5
Flying Brian

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St. Clairsville, Ohio

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I use the D/R switch for different Expo settings, but as far as the D/R, I tried it, but don't really see that it is needed.

"I just don't Listen" "

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04-23-2009 12:22 AM  9 years agoPost 6
Hellsiege

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Colorado Springs, CO

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Expo guy here as well. Dual rates would screw me up as like with planks I'm sure I would forget to turn the switch back moving between maneuvers. Expo lets me dial in the "feel" to where I like it. My $.02

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04-23-2009 12:29 AM  9 years agoPost 7
rexxigpilot

rrProfessor

Florida

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Most who fly a heli setup with 3D cyclic rates and piro rates will use expo on the aileron, elevator and rudder. All my helis use about 25% expo for cyclic and 30-40% on rudder. Even if you don't over control the heli without expo, you will gain precision in minute (as in small, not 60 seconds or angular unit of measurement) adjustments if you set some expo in the cyclic movements. If you don't have the piro rate set to blaze, you can probably get way with no rudder expo.

I don't recommend dual rates. Too often you will need maximum cyclic and/or collective to get out of trouble. It won't be there instantly if you have dual rates set. Having to flip a switch when disaster is imminent is not a good idea. It's hard enough to remember to hit t-hold when she's doing an unscheduled landing.

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04-23-2009 12:43 AM  9 years agoPost 8
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Multiple Forward Flips
edit

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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04-23-2009 12:43 AM  9 years agoPost 9
TaleGunner

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Deer Park WA

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the only place I use expo is on the throttle curve. no dual rates

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-23-2009 01:17 AM  9 years agoPost 10
RCHSF

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NC

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What can Expo do for me? As a beginner. I don't have no special setting.

Just all leniar curves, and gyro sensing.

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04-23-2009 01:19 AM  9 years agoPost 11
S76 Mech

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Hatboro, Pa.

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Expos for Pussies!

Gaui Greatness X7, X5, NX4, X3

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04-23-2009 01:34 AM  9 years agoPost 12
Flying Brian

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St. Clairsville, Ohio

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What can Expo do for me? As a beginner. I don't have no special setting.
Expo will make your helicopter more or less sensitive during flights. Give it a try, and see how you like it. If you need help setting it up, just ask, Im sure somone can help you out.

Edit: I believe the DX7 requires + expo, for more of a softer center stix.

"I just don't Listen" "

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04-23-2009 02:55 AM  9 years agoPost 13
bulldogs

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~OC~ ,CA USA

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10% Expo on the tail for me.

~TEAM OCHC~
A strong man stands up for himself a STRONGER man will stand up for others.

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04-23-2009 02:56 AM  9 years agoPost 14
caseyjholmes

rrElite Veteran

Portland, Oregon

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I use a d/r for in flight piro rate adjustment.
Never used expo until I bought a 450 Pro..

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04-23-2009 03:08 AM  9 years agoPost 15
pcliftonjr

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Phoenix, AZ

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Dual rates no...expo yes.

Paul

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04-23-2009 03:13 AM  9 years agoPost 16
holzback

rrKey Veteran

noblesville IN United States

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actually a lot of people use D/R to control the piro rate of their gyro. expo helps when you are moving the sticks fast and do not move them perfectly straight.

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04-23-2009 05:24 AM  9 years agoPost 17
zaw

rrKey Veteran

Lebanon, NH - USA

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You can turn up the EXPO to get more response out of sticks too.

ಠ_ಠ HBK2 built with inexpensive parts! ٩๏̯͡๏)۶ Gaui425

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04-23-2009 06:42 AM  9 years agoPost 18
Sam2b

rrElite Veteran

Tacoma, WA

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Expos for Pussies!
Heck I've seen some real dicks use expo.

On a serious note: I use lower aileron dual rate to compensate for the natural CCPM aileron overshoot when the swash mix elevator & aileron have the same values. On the DX7 series transmitters, if you have different values for elevator and aileron, you will have interaction throughout the full collective range. Just dial out the aileron overshoot to match the elevator pitch using a pitch gauge on the work bench. My heli's feel awesome in the air since I've started doing this.

I also like about 20%-35% expo (depending) to help smooth out stick movements in big maneuvers and not show as bad corrections which appear as twitching or jerking. FAI guys use positive expo and lower dual rate to get their perfect hovering. Then switch to a different flight mode for the other maneuvers with other dual rate & expo settings.

_Sam B_

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04-23-2009 06:56 AM  9 years agoPost 19
Dale M

rrApprentice

Lakewood Ca USA

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Expo is a good thing! If you're running a 770 gyro then expo and dual rate is required to make it work correctly. I used to fly without expo until a friend asked me to hold the helicopter in an inverted hover for photos. Found out how hard it was to keep it steady for the pics.... A little expo fixed that problem right away! Give it a try

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04-23-2009 07:43 AM  9 years agoPost 20
Bad Karma

rrVeteran

UK

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You can turn up the EXPO to get more response out of sticks too.
What....

No, it just seems like its more responsive, all you have done is make it go further on the swash near mid stick, and there is no good reason why, if the heli doesnt roll fast enough then you need to adjust the swash mix, end points or the mechanical setup eg paddles to get a faster rate, for a quicker responce time you need quicker servos.

All you achieve by using positive (futaba) expo is to make the heli unnaturally twitchy at centre stick, and only seem more responsive.

Its a poor setup.

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HomeAircraftHelicopterHelicopter Main Discussion › Dual Rates and Expo How many use it?
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