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Aerial Photography and Video > First HC flight ... could do with some input please!
 
 
nooobs
Veteran
Location: Toronto, Canada

Quote 
The AUTO TRIM FUNCTION DOES NOTHING in regards to bringing the heli back to some preset value thats going to make the heli fly right after the fact. Dont even use the grey wire. If it goes out of trim (wich it most likley wont) just trim it back.

chris10362 this is incorrect information. The autotrim does work.

When you flick the switch for your autotrim the lights should flicker red. You only need to do this for a second then switch it back.

You only need to hover for 8 seconds before flicking on the AUTOTRIM.

The heli will hold the position. If you rotate your heli around then you'll have to re-autotrim.
03-31-2008 04:53 AM
HOMEPAGE  
 
 
Vortex Aerial
Senior Heliman
Location: Huntington Beach Ca

Quote 
I settle into a hover, hold for a few seconds, flip autotrim, and it just sits there like I was still hovering it.
Quote 


Trimming for level hover with the HC switched on does the same thing. You dont need the auto trim and the grey wire makes it a hastle for those with limited output ports and there receivers.

You do not have to worry about landing and hitting the set button again.

As far as the set button goes you only use it ONCE and thats during initial setup. After that you never touch it again. Trimming for hover and then landing to use the set button changes the reference setting you programmed when you first set it up.
03-31-2008 04:54 AM
HOMEPAGE  
 
 
Vortex Aerial
Senior Heliman
Location: Huntington Beach Ca

Noobs,

I had the exact same idea as you but Chandler told me that by the time youve sweated out a 8 second, dead-nuts hover (a feat for all but the seasoned pilot) and hit the auto-trim switch.....you could have just trimmed it with your Tx and been good to go plus not have had to wonder which port your going to use the grey wire on.
03-31-2008 04:58 AM
HOMEPAGE  
 
 
nooobs
Veteran
Location: Toronto, Canada

Quote 
I had the exact same idea as you

It's not an "idea"... I do use it and it does work.


Quote 
Chandler told me that buy the time youve sweated out a 8 second, dead-nuts hover (a feat for all but the seasoned pilot) and hit the auto-trim switch.....you could have just trimmed it with your Tx

Practice, practice, practice... You do not have to be in a dead-nuts hover...

Quote 
not have had to wonder which port your going to use the grey wire on

AUX


Sounds like all excuses from Chandler... to each their own I guess...
03-31-2008 05:05 AM
HOMEPAGE  
 
 
Vortex Aerial
Senior Heliman
Location: Huntington Beach Ca

Not trying to argue. No loyalty to Chandler. I just think he deserves mentioning because he cleared up alot of things that made no sense or were unclear.
Ive just found its a simpler way to go. The HC is confusing enough as it is if your new.
03-31-2008 05:11 AM
HOMEPAGE  
 
 
Hogster
Key Veteran
Location: Surrey, UK

Had another flight this morning with the altered gyro settings - WOW!!! It works beautifully!!! No wag, no drifting whatsoever, smooth stops after giving yaw inputs .... am most pleased! So evidently the default setting isn't heading hold at 65%

I also had a go with the trimming ... so I got the helicopter into a stable hover using trims, landed, held the SET button until the light went green, then flew again. But the heli still tends to drift a little bit when gain is added ... I'm looking forward to trying the auto-trim thing, as having to land every time to press that SET button is a real pain. Coming from the AP2000i, I'm used to trimming the heli in-flight which always worked well with the AP2000i ... for instance if I yawed the heli so it was pointing in a different direction relative to the wind, I could just add a click or two of trim to account for the difference in wind direction ....

Have ordered the software and serial-to-USB converter which will be here tomorrow.

Cheers!


David
03-31-2008 12:30 PM
HOMEPAGE  
 
 
_architorture_
Heliman
Location: Tampa, Florida

At least try the autotrim, I think you'll be happy with it. I was kind of dissappointed with the helicommand using the manual trims, there was more drift than I thought there was going to be, but it's much better with autotrim.

Not to be rude, but I would think that if you can't hold a hover for 8 seconds, you shouldn't be strapping a camera to your helicopter. It doesn't have to be rock steady, but the more accurate your hover is, the more accurate your trim will be.
03-31-2008 01:32 PM
 
 
rerazor
Elite Veteran
Location: Mich.

Autotrim does work and works quite well. Chandler is wrong on this point and I think if he goes back and re-tests it he will find it is beneficial.

You will always have a little drift (on a flat level plane) but after all that is all you really want with horizontal hold. Preventing drift is the Position Holds job albeit at very low altitudes and being unpredictable. Applying a little cyclic is not a big deal when you never have to worry about the heli rolling/pitching.

Plus, using the auto trim once in awhile I think helps reset the gyros and center them. After all the HC## versions are just using simple Piezo gyros.
03-31-2008 01:53 PM
 
 
_architorture_
Heliman
Location: Tampa, Florida

rerazor is right on. You will need cyclic corrections, but it's not the same as flying with no helicommand. Hard to explain, it's like controlling the heli's position in a flat X-Y axis. Normally, cyclic inputs cause the heli to roll or pitch, and left uncorrected you would go into the ground eventually. With the helicommand horizontal hold mode, cyclic moves the heli around in a flatter manner, and when you let go of the stick, it rights itself, however it does retain momentum, so it kind of slides sideways until you correct it. Very helpful though, I like it a lot.
03-31-2008 03:10 PM
 
 
Hogster
Key Veteran
Location: Surrey, UK

This is great thanks so much for the feedback guys People are right when they say this forum is like a decent instruction manual for the HC!

I know what you mean about moving the helicopter around on an XY plane - it was similar with the AP2000i - that kept the helicopter level too and it still maintained momentum, but I loved it! I hope I can get the HC set up to perform just as well

Thanks again!


David
03-31-2008 03:15 PM
HOMEPAGE  
 
 
nooobs
Veteran
Location: Toronto, Canada

Quote 
Not to be rude, but I would think that if you can't hold a hover for 8 seconds, you shouldn't be strapping a camera to your helicopter

Thinking of testing out a HC3D.

Just did my first inverted nose-in hover for 5 minutes with a Trex600. Without HC.

I think I'll test out a HC3D and see how it works while inverted.
04-01-2008 04:26 AM
HOMEPAGE  
 
 
Vortex Aerial
Senior Heliman
Location: Huntington Beach Ca

Just got back from testing/videoing.

Let me say publicly that i hooked my autotrim back up on the HC.

You guys are absolutely correct....it DOES work better than just trimming alone. My apologies. Before i was kind of chasing it with the trims on the TX. This thing appears to have some kind of a "learning feature" programmed into it. Itll hover very well.....then..if you fly it around at speed with banked turns (just circuit flying, nothing radical) itll go out of trim. But if you force a hover from that point itll eventually start to hover on its own again.
At any rate the thing works like i thought it was supposed to now.
04-01-2008 06:53 PM
HOMEPAGE  
 
 
_architorture_
Heliman
Location: Tampa, Florida

I thought the same thing when I got it and did not have the autotrim set up. I was contemplating returning it actually. Then I hooked up the autotrim and life was good. Glad to hear you like it so much!
04-01-2008 06:57 PM
 
 
Hogster
Key Veteran
Location: Surrey, UK

This is most encouraging! I look forward to using the Auto-trim soon (have got the remote-trigger set up now)!

Cheers,


David
04-01-2008 08:26 PM
HOMEPAGE  
 
 
nooobs
Veteran
Location: Toronto, Canada

Quote 
it DOES work better than just trimming alone

Glad to hear you got it working.

I always fly fast forward flights taking wild sharp banking turns where the heli is almost 90° sideways with slight horizontal mode gain. Same with lateral and backward figure eights. Makes no diff.

As soon as you hover it's back to normal. It just holds. For hover I raise the gain a bit more. ...then of course you can autotrim whenever you like. Sweet.
04-01-2008 10:38 PM
HOMEPAGE  
 
 
Crazy-Joe
Heliman
Location: Germany

Hey guys,
came in here too late... everything seems discussed already
Only to mention one thing again: the autotrim-function is not only an option but especially for AP works even recommended. As you often change your payload and consequently your helis balance, the AUX channel should always be set up for autotrim at anytime. So this function is really more than just a nice one, it's necessary in my opinion.
The SET button proceedure is just for getting it trimmed manually at first, not using the autotrim, or if you change the trims on your radio significantly, wherefore ever.
All this is also explained on top of page 30 and 31 in the manual V1.6.

Cheers,
Joe
04-02-2008 11:35 AM
 
 
_architorture_
Heliman
Location: Tampa, Florida

Quote 
With that being said, how is everyone setting their heads with the helicommand? Doesn't the autotrim feature set a little trim in the pitch and roll axis, so they would not be correct when setting everything to 90 degrees. Being that you cant use subtrim, what do you do if your servo arms are a little off? What is the best way to set 0 and full pitch?

I still have not heard how people are setting up their heads correctly with helicommand. I have too much cyclic pitch and need to reduce it, and I'm not sure if my swash is exactly level. I usually make these adjustments in the radio, so now I use the software from helicommmand?
04-02-2008 01:33 PM
 
 
nooobs
Veteran
Location: Toronto, Canada

Quote 
I have too much cyclic pitch and need to reduce i

Use the Mixer tab's "control travel" sliders...






Quote 
I'm not sure if my swash is exactly level.

I use a swash plate leveler...

04-02-2008 02:08 PM
HOMEPAGE  
 
 
_architorture_
Heliman
Location: Tampa, Florida

Where did you get that leveler?
04-02-2008 05:13 PM
 
 
AceBird
Elite Veteran
Location: Utica, NY USA

I made my own. Anybody can do it if you have a drill press and tap.

Ace
What could be more fun?
04-02-2008 05:42 PM
 
 
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JR-Spektrum . E-flite . Futaba-RC

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Aerial Photography and Video > First HC flight ... could do with some input please!
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