how does a gyro work

[shaggybirdman]

i just don't get how a gyro works, or should i say how heading hold works. why doesn't it center the blades when you let go of the stick? i'm learning to hover with my trex, but in hh mode i have to bump the rudder stick to stop the tail after a correction. why is that? rate mode makes sense to me. so ounce i can hover, and in hh mode will i still have to bump the stick to stop the tail from drifting the other way as well?

ya get told to get a hh gyro, but it doesn't work as expected. push right stick, and it moves right, but doesn't stop. well at least while on the ground. i'm using Radd's flight school. have a few more packs to go before i get to leave the ground.

please explain it to me.

[Skarn]

When in flight, HH gyro will stop the movement when you stop giving it rudder input. It works fine in the air, but on the ground it will not recenter itself.

If you are having to bump your rudder to stop a commanded rudder movement, something is not setup right in the gyro.

Skarn

[shaggybirdman]

When in flight, HH gyro will stop the movement when you stop giving it rudder input. It works fine in the air, but on the ground it will not recenter itself.

If you are having to bump your rudder to stop a commanded rudder movement, something is not setup right in the gyro.

Skarn

it's when it's on the ground. i'll have to just use rate mode till i get airborne.

[Tomas Ahl]

it's when it's on the ground. i'll have to just use rate mode till i get airborne. No you don't! A heading hold gyro won't center when you release the stick while the heli is on the ground because the gyro has heard your request for a swing of the tail and until the gyro senses that swing it wont let go! In the air the gyro has authority and there it will work as you expect it.

You can never judge a heading hold gyro by its behaviour on the ground!

[darkchiild]

Rate mode works the way you expect because it responds to rudder inputs directly. When you let go, it re-centers the tail. It also doesn't hold a heading perfectly. It'll drift around. Think of the HH gyro as a computer that locks on to a specific heading.

When you hit some right rudder, you're not controlling the tail directly. You're telling the gyro that you want to change the heading of the nose to the right. When you're in the air, the gyro will then change the tail pitch to accomodate your command, and the gyro will then re-center your tail slider when it reaches the heading you told it to go to. On the ground however, the gyro can't move the heli so well, so when you tell it to change the heading, the tail will continue trying to go right until the heli has changed the heading to wherever you specified, which will likely be never until you get it in the air.

Make sense?

[Skarn]

it's when it's on the ground. i'll have to just use rate mode till i get airborne.

Bro, as I mentioned before, there is no reason for you to use rate mode!

Even when doing Radd's, you should use HH mode and never look back!

Skarn

[shaggybirdman]

Rate mode works the way you expect because it responds to rudder inputs directly. When you let go, it re-centers the tail. It also doesn't hold a heading perfectly. It'll drift around. Think of the HH gyro as a computer that locks on to a specific heading.

When you hit some right rudder, you're not controlling the tail directly. You're telling the gyro that you want to change the heading of the nose to the right. When you're in the air, the gyro will then change the tail pitch to accomodate your command, and the gyro will then re-center your tail slider when it reaches the heading you told it to go to. On the ground however, the gyro can't move the heli so well, so when you tell it to change the heading, the tail will continue trying to go right until the heli has changed the heading to wherever you specified, which will likely be never until you get it in the air.

Make sense?

that's basically what i said in the above post, but with an explanation witch ansured my question.

[shaggybirdman]

Bro, as I mentioned before, there is no reason for you to use rate mode!

Even when doing Radd's, you should use HH mode and never look back!

Skarn

you do realise that till the end of his training (pack 10) you never leave the ground. basically it teaches you stick movement/feel. as you explained hh is basically useless while on the ground.

[shaggybirdman]

well it had to happen. my first crash. not bad, but i gotta get parts. need a tail, and the head although align calls it something else. see the head damage. gotta start a wall of shame :thumbup:

[Hawk18052]

Had to be pavement or a brick wall.

Just curious,
Hawk

[Skarn]

you do realise that till the end of his training (pack 10) you never leave the ground. basically it teaches you stick movement/feel. as you explained hh is basically useless while on the ground.

Yes I realize that and no HH mode is not useless on the ground...you misunderstood.

When I referred to "on the ground" I was referring to it not flying as in bench testing/setup. If you are doing Radd's, you are still "flying" to a point and the tail will move. HH mode works because the tail does move and it will be ok.

Again, use HH mode when learning Radd's as well! You do not need to fly in rate mode.

Good luck man, you're getting there!

Skarn

[shaggybirdman]

neither. on carpet in my basement. was in idle up. poped her up, and i did something stupid to make me have to land. landed hard, and the head just broke off. lost the head, and one tail blade. above it said tail, but it was just a blade. have the parts in hand. after dancing with the stars i'll do repairs. got the so called bat blades now for tail duty.

i'll snap a pic of where i was doing my Radd's flight school.