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Beginners Corner > Possible stupid question from newbie
 
 
drken
Heliman
Location: Edgewater, NJ

I've only flown in a simulator (Phoenix), so this may not be relevant to the real world. But, I've noticed that when I lift off the heli will drift to the left, then to the right if I leave it to it's own accord. Adjusting the trim can decreases the amount of left drift, but also speeds up how fast it swings back right. As I don't have a real heli yet, I've been using several different ones such as TRex, Raptors, etc and it happens with all of them. While the nitros are more stable, they still do the left, then right thing.

Is this normal for helis, it makes it very difficult for me to adjust the trim. Although slowly but surely I am starting to get the hang of tail-in hovering, at least for short periods of time.
09-26-2008 06:02 AM
 
 
Spitfire1
Veteran
Location: Perth Australia

The heli wont stay in one spot for too long without you haveing to stop it, after a while you will just put those inputs in without thinking, I personally find screwing around with the trims all the time gets annoying, specially since the winds alway a bit different or maybe how you strapped on the pack, but try and get it trimmed at least close so the heli is easy to fly.
Also ive found that allthough expo makes the flying smoother it can make a slightly out of trim heli harder cause you need to hold more stick.
09-26-2008 06:10 AM
 
 
drken
Heliman
Location: Edgewater, NJ

I've noticed that the heli has a mind of it's own. Just when I think I've got it confined to one spot, it starts moving around on me. That I get. But, this is consistent and shows up every time I lift off. Does every heli do this?
09-26-2008 06:15 AM
 
 
jrett
Senior Heliman
Location: san jose, ca.

First let me get a clear picture of what you are doing.

Are you saying that with no input from you, it simply goes left, then right, all by itself? This is indeed odd, but the first thing I would check is to make sure that your simulator has 0 MPH for the wind. Turn off wind in your simulator. That may explain this.

On the other hand, if your heli goes left, then right, as a result of you compensating for it going left, then this is normal. Flying a helicopter is like balancing a ball on top of a ball. Okay, maybe not that hard, but the point is, the helicopter needs constant minor command inputs from you to hover. This is very much normal. You'll get the hang of it.

That being said, you should try trim your helicopter so that it is as steady as possible, just remember, it will NOT hover hands off. Not for long.

I hope I was helpful.
09-26-2008 06:54 AM
 
 
ruddernate
Veteran
Location: sulphur,Ok.

it is normal for the heli to go left on take off. they all do due to forces at work in the head. this is a realistic part of all the sims i've flown. on spool up your tail will try to go right and take off the heli will go left. get used to it. all helis do it. check out radd's school of flight. he discusses this in more detail. it's normal.when i first started, my first challenge was to lift off perfectly straight up. giving a little right input. it shouldn't automatically start going right though, without your input. the way i'm understanding you it sounds like you need a little left trim and a little more right input just on take off. get her in a stable hover and trim her out and then see how she takes off.

fly it like you stole it
09-26-2008 09:29 AM
 
 
BarracudaHockey
rrMaster
Location: Orange Park FL

Its not really the head its the tail rotor.

The tail rotor is blowing (in most cases on a model) the helicopter to the left. It's called translating tendency. You have to compensate with a little right cyclic so the helicopter leans to the right a bit in a hover.

If you have one of the rare models with a left hand main rotor (counter clockwise) then everything is opposite, it pushes to the right and leans to the left.


AMA 77227
http://www.jaxrc.com
09-26-2008 11:43 AM
 
 
mikeflyz
Senior Heliman
Location: Westlake Village, CA

The left drifting is called "translating tendency."

The tail rotor pushes the heli to the left (in addition to providing antitorque thrust), requiring some right cyclic. The heli will hover right skid low as a result.

The opposite happens with counter-clockwise turning blades.

Mike
MA Fury Extreme, Logo 600 and T-Rex
09-26-2008 12:16 PM
 
 
drken
Heliman
Location: Edgewater, NJ

Thanks everyone!

I've noticed the slight lean to the right when hovering. I'm glad to hear that's normal. I'll keep practicing and eventually, I'll get it down pat.
09-26-2008 04:48 PM
 
 
neilg.
Heliman
Location: massachusetts

i find when i hover heli gets away from me but i know it is because my fingers on the srick are sending inputs to the servos. i just can't find a way having lighter stick control. and then i see saw because i hold stick a little too long and then compensate.

reinstated with helifreak -- for now
09-27-2008 03:20 PM
 
 
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Beginners Corner > Possible stupid question from newbie
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