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HomeAircraftHelicopterBeginners Corner › Trimming up
10-10-2011 11:52 PM  6 years agoPost 1
taxus812

rrApprentice

Conecticut - USA

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I can hover now keeping the heli within a few inches. Steady enough to tell I needed some trimming out( a feat in itself).

It was a calm day and I was able to trim it up so it can hover thumbs off in all orientations. it took about 4 clicks right arilion on and 2 back elevator.

What do you do to complete trimming.

Do you
1) Take note of the trim positions and leave it.
2) Set sub trim and nutralize the trims on the TX
3) mechanically correct trim and neutralize the trims on the TX

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10-11-2011 12:02 AM  6 years agoPost 2
Dood

rrProfessor

Wescanson

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Do you
1) Take note of the trim positions and leave it.
2) Set sub trim and nutralize the trims on the TX
3) mechanically correct trim and neutralize the trims on the TX
It is a definite NO for 2 and 3. 1 is acceptable.

Some will argue that 3 is acceptable, but I say it is unacceptable because step #1 rule in heli setup is to build everything square and set geometry to 90° at mid stick. Once you start trying to mechanically trim everything, you begin interfering with your 90° setup, which isn't good. Same thing with sub trim. The only time you should use sub trim is to get servo horns 90° to the pushrods at mid stick. Using sub trim after the fact throws that off.

Some people go crazy with leveling their swashplate, but I don't get too fussy with that.

The best and most effective way to lock in and minimize usage of trims is to ensure you've got a properly balanced helicopter. There are no shortcuts to get around this.

Please note: a properly trimmed helicopter will tend to drift slightly to the LEFT. This is OK.

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10-11-2011 01:12 AM  6 years agoPost 3
taxus812

rrApprentice

Conecticut - USA

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Wouldn't you want to trim out that slight drift ?

Also what is this balancing you speak of . I never knew you needed to do that (and don't think anyone I spoke to did it). There was no mention of it in the manual.

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10-11-2011 01:37 AM  6 years agoPost 4
Dood

rrProfessor

Wescanson

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what is this balancing you speak of . I never knew you needed to do that (and don't think anyone I spoke to did it). There was no mention of it in the manual.
I seriously hope you're joking. You need to balance your helicopter.

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10-11-2011 01:55 AM  6 years agoPost 5
taxus812

rrApprentice

Conecticut - USA

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Lol Nope not joking. Outside of blades, never once checked CG. As a beginner I spent a lot of time with very experienced pilots going over my setup never a mention of it. Manuals have no mention of it (unlike planks).

Since these birds are engineered and made from standardized parts, I thought even with variations in manufacturing put it within the tolerances for the birds CG.

So far this has held true.

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10-11-2011 01:56 AM  6 years agoPost 6
Heli 770

rrProfessor

USA.

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10-11-2011 02:00 AM  6 years agoPost 7
Dood

rrProfessor

Wescanson

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This video shows the same method as on the raptor technique link.

Watch at YouTube

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10-11-2011 09:42 PM  6 years agoPost 8
taxus812

rrApprentice

Conecticut - USA

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Sure as poop just a bit nose heavy. When I move the rudder servo to the tail it should be on the money. For now one click back elevator will be fine. (since I know what to do)

Looking at my trims I actually only had two clicks right aileron to compensate for small left drift. So it sounds like it is good laterally

Thanks for the help.

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10-11-2011 11:21 PM  6 years agoPost 9
Garrett5ss

rrNovice

Mobile, AL USA

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I must also thank you guys for giving me a few tips on balance and trim and what to NOT do, also what to expect.. Im still a newbie though, just got my first mini 4 channel, but this really helps out! (Too bad the damn thing came with a servo that wouldnt push the bearing up high enough to move left or forward, just shook uncontrollably(sp?), so had to send it back... BLAH, its ok though, I had bought a Esky 4 ch nano co-ax, but im about to order a Wall Xieda 9958 4 ch mini FP while i wait for them to send me a replacement, also ordering from a different company this time lol even though xheli.com is supposed to be a leading site for r/c copters, but ive found many more that I like just as much!

Thanks for the trimming and balance tips for us newbies!

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