pitch curves thro curves expo etc

[loz]

could anyone shed a bit of light on what pitch curves, throttle curves and d/r expo settings a begginner with a trex 500 and the dx6i should be using, cheers, loz

[adieuk]

this is some settings a mate gave me
Hopefully this helps you.

some models may vary.

Throttle curves:
PointNormal modeIdle-up 1Idle-up 2
L (or 0)0 100 100
1 Inh Inh Inh
2 Inh Inh Inh
35065 (100 is also fine)65 (100 is also fine)
4 Inh Inh Inh
5 Inh Inh Inh
H (or 7)100 100 100

In Normal mode a linear curve works fine. After about 20-25% throttle, the governor takes over.

In idle-up 1 and 2 any high value will work because the governor will control the speed. I just had my Point 3 set to 65 because I’m used to setting up nitro helis and nitro helis need to have a “V” or “U” curve (most of the time J). On an electric heli, a lot of people use a straight line “curve” (like 100-100-100 or 90-90-90) because electric motors run well on such a “curve”.

Pitch curves:
PointNormal modeIdle-up 1Idle-up 2Hold
L (25.0) 0 0 0
1 Inh Inh Inh Inh
2 Inh Inh Inh Inh
3 50 50 50 50
4 Inh Inh Inh Inh
5 Inh Inh Inh Inh
H (or 7)100 100 100 100

in Idle-up 1 and 2 the pitch curve needs to be linear for 3D flight. A 3D flight pitch curve is based on center stick being 0 degrees pitch. All positions above center stick translate to positive pitch and all positions below center stick translate to negative pitch. The 3D flyer wants the throw above and below center stick to be equal. A linear pitch curve does this. If not linear then you would have unequal pitches above and below center stick.

Think of it like this….50% is center stick (0 degrees). 100% is full stick and full positive pitch (say 10 degrees). 0% is full low stick and full negative pitch (-10 degrees). Halfway between center and full positive stick would be 5 degrees pitch. Halfway between center and full negative stick would be -5 degrees pitch. Both sides of the stick result in equal pitches. That is the proper 3D set-up. Why? Because the 3D flyer makes no distinction between upright and inverted flight. He wants the heli to respond the SAME in both upright and inverted flight.

As you can see I make ALL pitch curves the EXACT same in all modes. Why? If all pitch curves are the same, switching between Normal mode and any other mode will NOT affect the pitch and the heli will not “jump” or drop.

If you have EXPO in your pitch curve menu, make sure that you either keep it ON for all modes or OFF for all modes.

Now…there are some arguments that can be made that the 3D pitch curve does not NEED to be linear (to soften the feel around hover, for example), but the curve SHOULD be a mirror reflection between positive and negative. There’s no great reason to not have a linear curve and I suggest keeping it simple and make it linear.

About elevator, aileron, and rudder expo….this is purely subjective. Everyone likes a different “feel” and no one value is correct or wrong. “Normal” values are anywhere from 0 to 30, generally to help neutralize the area around center stick.

Hope this helps.

[loz]

thanks, not sure i really understand it but cheers anyway lol

[adieuk]

someone will come forward and make it easyier to understand

[CookieMan]

Its the same what Adie posted above, but in a tablature format. This is what he gave me to use while learning as well, when I started. It worked well, must add




Tell me which part of this you don't understand and we'l explain that mate.

[adieuk]

ok se if you can understand these settings

thro curve normal
0. 25. 50. 75. 100 expo on

thro curve st-1
100. 68. 57. 68. 100 expo on

thro curve st-2
same as above

pitch curve norm
25. 36. 50. 72. 100 expo on

pitch curve st-1
0. 28. 50. 72. 100 expo on

pitch curve st-2
0. 28. 50. 72. 100 expo on

pitch curve hold
0. 28. 50. 72. 97 expo on

and set your expo to about 20 to 30%

hope this will help you

[loz]

Its the same what Adie posted above, but in a tablature format. This is what he gave me to use while learning as well, when I started. It worked well, must add




Tell me which part of this you don't understand and we'l explain that mate.

hmmm, so whats all this idle up 1 and 2 all about cant find anything that says that in my tx?

[adieuk]

it is stunt mode setup

[loz]

ok se if you can understand these settings

thro curve normal
0. 25. 50. 75. 100 expo on

thro curve st-1
100. 68. 57. 68. 100 expo on

thro curve st-2
same as above

pitch curve norm
25. 36. 50. 72. 100 expo on

pitch curve st-1
0. 28. 50. 72. 100 expo on

pitch curve st-2
0. 28. 50. 72. 100 expo on

pitch curve hold
0. 28. 50. 72. 97 expo on

and set your expo to about 20 to 30%

hope this will help you

yeh these figures look a bit more like what im reading but what does st 1 st 2 mean? still dont really know what 20 or 30% expo means either when i go to d/r expo it just says aile 100% elev 100% and rudd 100% is that ok ?

[adieuk]

D/R will be 100%
but you will need to change the elev aile to 20 to 30%
im not sure how you can do it on the dx6i

[loz]

it looks like i can just reduce aile and rudd from 100% to whatever i want, but down to 20 -30% thats a big difference isnt it?

[CookieMan]

Mate,

Expo is something you add to slow down the responses of the heli to your sticks.

The more you add +20, +30 etc.. the more sluggish you're helicopter will respond to your stick inputs - which in a way is a good thing, when you're a beginner when you tend to give more stick movement than you require, inevitably causing the heli to drift into orientations you maybe uncomfortable with.

On the contrary, if you reduce the expo down to -10, -20, -30 etc... you are making it more 'reactive' to the every micro-millimetre of your stick input. At your stage you do NOT need this.

Now, I don't know much about how to set it up step by step, on the DX6i but I have found you this VIDEO.

The guy seems to explain the setup well. This is the part 3. Also look at part 4.
Oh and try reading the manual as well. I'm sure it explains each setting up part in detail.

[loz]

thanks for all the info guys sorry to be asking all these questions its all foreign to me

[adieuk]

not a problem mate happy to help if i can

[CookieMan]

not a problem mate happy to help if i can

Adie is da man!