(n)mode hover trim help

[apriliamille]

hi
im still very new to copters
3dx/hdx 450 electric using aitronics sd10-g
in my hover (n) mode
im at a spot on the throttle stick where i cant get the sweet spot
i get to about knee high level off the ground. i apply just a tad more throttle stick up and it goes up up up up
i bring it down the tad and it comes down down down fast enough it cant recover in time before terra firma

should i use the hover trim on the throttle stick for head speed. if so up or down
or should i use the hover trim on pitch. if so up or down
thanks

[laughingstill]

Are you saying the stick inputs are fast? If so, you may want to set a softer pitch curve that will make it a little less touchy........Ron

[apriliamille]

im at a spot where
it hovers fine at about knee level. not hands off hover but hovers. if i go up just one tiny bit its like it is too much and shoots skyward and i drop that one tiny bit back it comes down faster then it can recover at the knee level height
this is with the left throttle stick when i mean up or back.
give it that one tad bit more "gas" and boom etc

[Projectx]

what are your throttle and pitch curves?

[cmulder]

Could you tell us what speed controller you are using,what motor how manny cells your battery pack is,and the number of thooth on your motor pinion.
This info helps us to calculate what rpm your rotor (headspeed) has full trottle.
Its simple the voltage of your pack times the "kv" of the motor is the "no load" rpm of your motor.
Then that rpm times the number of thooth of your motor pinion (thooth per min) and that figure devided by the number of theeth of your main gear.

A slower headspeed makes a heli fly calmer (slower to react on inputs) but ofcource is lacking perfomance to pull out of problems.
A faster headspeed makes your heli react quick but for a beginer this might be a bit too mutch to learn on.

The best way in my opinion to "set" the headspeed is to choose the pinion of the motor right and not fly half trottle since that is less efficient on botht he motor as the speed controller (they will get warmer)

I hope this helps a bit ;)

[apriliamille]

turnigy 2836-3700 my scorp motor is on back order
scorpion heli 60 amp v2 in normal flight mode (im having probs with the slow start in heli mode so i left in aircraft mode)
11 tooth pinion
its the standard trex 450 gear so im not sure what the teeth are on the main rotor (155?)
th curve is strait 0-100
p curve is a 50 50 75 100
3s2200 packs
cnc 3dx 450 heli (hdx)

atx sd10g tx

[3D-Seth]

One thing I think off the bat is that some radios have a ratchet on the throttle, does yours? Most heli specific radios dont, but some do for whatever reason.

Like other said too, if the above is not true, you can flatten out your throttle curve where the hover "spot" is to make it easier to find that one particular spot.

Hope this helps.

Seth

[CSpaced]

I'm with the others and think you need to flatten out your pitch curve a little in the middle. I'm not too familiar with that particular radio, but I believe it has a 9 point pitch curve? You only listed 4 points, are you able to activate a 5th? If you can I would set it to 50, 55, 60, 65, 100 and see if that helps any. Take note of what ever settings you change, so you are able to change them back if you need to.

[apriliamille]

it does have a 9
bah i think i messed that up thought i did it like finless
going to go back and re do that and flesh it out more

[apriliamille]

seth
ok yeah i didnt think about that
its ratcheted
will have to read up on loosening that up

[CSpaced]

seth
ok yeah i didnt think about that
its ratcheted
will have to read up on loosening that up

On a lot of transmitters you can open the back of the radio and simply reverse the ratchet spring. This will make the throttle stick smooth throughout its movement, and give a little more precision when hovering.

[apriliamille]

k the ratchet is loosened up. didnt seam that hard to do for a noob who has never opened up a tx before

charging up the lipo then will work on a 50 55 60 65 100

will report back after fly time on sunday of what i failed or succeded at

[apriliamille]

well. quite odd. not sure how to explain
re did the zero degrees at mid stick
what was hapening prior to today was the spot at knee level where one more movement on throttle stick and it shot up high

today it seamed to hover a little higher up in the "band??" at about waist level then the next stick movement up shot it way up.

maybe im expecting it to do something that it isnt suppose to do and i should just learn to "fly" it?

anyhow something gave out in the head and it looks to be a complete write off on the head.
not sure what gave but the aftermath of it spinning at hover speed when something broke was quite a chain reaction through out the entire head. messing up the main hub, one of the wash out levers, one of those cylyndar fly bar tubes and wrapped one of the linkages into a nice coil around the main rotor shaft.

back to my planes while i wait on parts i guess

[JustPlaneChris]

The biggest thing causing the jumpiness is your linear 0-100 throttle curve! This means that not only are you changing pitch in the blades with stick movements, but you are also speeding up and slowing down the headspeed. This is a double whammy, making it feel extremely jumpy. Make your throttle curve "flat" across most of the range to keep the headspeed more constant, and I bet you'll notice a big difference.

[fireplug1111]

k the ratchet is loosened up. didnt seam that hard to do for a noob who has never opened up a tx before

charging up the lipo then will work on a 50 55 60 65 100

will report back after fly time on sunday of what i failed or succeded at

Take the ratchet out and turn it over, Some TXs will come with one for Airplanes and one for Helis. You DON'T want any ratchet. I turned mine over and put a little grease on it and adjusted the tension screw so it fit my needs.