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HelicopterMain Discussion › How many of you have mixing enabled?
07-11-2008 11:54 PM  9 years agoPost 1
QuantumPSI

rrElite Veteran

Atlanta, GA

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So I seem to be having a phasing problem with one of my machines and I've been playing with the phasing ring to get it to respond correctly. Of course the other option is to do it electronically. The benefit of this is that I wouldn't have to redo my linkages as a result of turning the phasing ring. So I'm just wondering. How many of you all out there are running mixes on your machine? I've never considered using them until now.

...now where was I, dh/dt = BS-dx/dt
I will fly you forever... till earth do us part

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07-12-2008 12:13 AM  9 years agoPost 2
AzHyper

rrKey Veteran

Peoria, Az.

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I'm using ail>ele and ele>ail (2 mixes) on one of my 600n's to help with an issue. It's free - try it out.

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07-12-2008 12:34 AM  9 years agoPost 3
ckoelliker

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St. Simons, GA

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Exact same as the post above.

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07-12-2008 01:37 AM  9 years agoPost 4
Eury

rrProfessor

Dover NH

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I ran them on my 600N to get fix the phasing error built into the head prior to switching to the V-bar. Easy to setup, and really makes the heli fly better.

Nick Crego

Citizen #0168

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07-12-2008 01:39 AM  9 years agoPost 5
AirWolfRC

rrProfessor

42½ N, 83½ W

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phasing error built into the head
Can you elaborate ?

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07-12-2008 01:47 AM  9 years agoPost 6
Eury

rrProfessor

Dover NH

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Not really, how much elaboration can be done? As it came out of the box, every 600N I've built and setup would not give pure elev or ail inputs even when everything below the swash was setup perfectly. It's not off by much, last one I did was around 3% IRC, but it is off. I've heard that the new washout and swash they came out with about 6 months ago helps, but haven't seen one so I can't say.

Nick Crego

Citizen #0168

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07-12-2008 03:29 AM  9 years agoPost 7
QuantumPSI

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Atlanta, GA

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For the longest time, I've been religiously against using mixing but it would save me some headache. I'm gonna give it a try next time I go out

...now where was I, dh/dt = BS-dx/dt
I will fly you forever... till earth do us part

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07-12-2008 12:13 PM  9 years agoPost 8
Autoeject

rrKey Veteran

Ashtabula, OH, USA

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Don't be against it when all your doing is neutralizing an inherent mechanical error. It's not as though your programming away poor flying habits.

Mark Webber
wai-rc.com
Spartan RC Distributor
Outrage Helicopters

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07-12-2008 01:26 PM  9 years agoPost 9
funflysteve

rrNovice

Sayre, Pa USA

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OK so i fly a 600N and i believe i have a phasing problem with it. What is a way to test to see if i need say ail-elev mixing or vice versa? Does it have to be done in flight and by feel or can it be checked on the bench somehow? The initial set-up is as Eury said as perfect as i can get it. It just seems to me that the machine is not flying straight during manuevers.

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07-12-2008 01:32 PM  9 years agoPost 10
Eury

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Dover NH

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It's easy to see on the bench. If the phasing is off it'll show up on the paddle son the bench. With the blades out, line the paddles straight with the boom, and moe the stick. Off the top of my head, elevator input with the paddles in this position won't move the paddles at all (I could be wrong, it may be ail, one way wll give full input to the paddles, the other should give none.) If you see the paddles wiggle a little, that's the phasing error (If they move a ton, then I screwed up and told you to give the wrong input). Set up a mix and play with the values until the paddles don't move at all. It'll end up being in the 3-7% range from my experience. Then move the blades so the paddles are perpendicular to the boom and do the other control input. After that the heli will track straighter through maneuvers, and fly more true. It'll take you all of 5 minutes to do it.

Nick Crego

Citizen #0168

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07-12-2008 01:37 PM  9 years agoPost 11
funflysteve

rrNovice

Sayre, Pa USA

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Great....Thanks for the help and i will check it out. This may put to bed a problem i have been trying to ignore for a month now. Or it may prove its just me ...lol

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07-12-2008 02:15 PM  9 years agoPost 12
lrogers

rrKey Veteran

Mobile, Al

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I just finished setting up my first use of mixes when setting the phase timing on a 5 blade head. It looks good on the bench, hopefully I see how good it is in the air today or tomorrow.

The sad part of this entire thing is that the manuals aren't much help. I copied the set up another fellow used. It appears to work but, I still don't understand the how to's and what for's!

Is there anyone out there that can shed light on this mystical process? Give a start point, if the head does this, you need to adjust this, sort of thing? I did discover the mixing vaules used on a JR radio must be reversed (like expo) on a Futaba. I also read that that when set up, if the cyclic stick is pushed forward, the swash should tilt forward and to the left (clockwise rotor rotation). Any other tid-bits?????

Larry Rogers - R/C Helicopter Pilot

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07-12-2008 04:01 PM  9 years agoPost 13
AirWolfRC

rrProfessor

42½ N, 83½ W

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The way it's supposed to work,
With a main blade over the tail, exercise the elevator cyclic.
- - notice I did not mention swash plate.
The blade should NOT show any change in pitch.
- - If it does, you need some phasing.
I go into some of the dynamics here, http://www.AirWolfRC.com/NFB.html

To adjust the phasing, you mix some elevator to aileron and some aileron to elevator in equal amounts.

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07-13-2008 12:35 AM  9 years agoPost 14
lrogers

rrKey Veteran

Mobile, Al

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Airwolf, let me see if I'm understanding this correctly when you say add in equal amounts. Do you mean in the aileron/elevator mix the amount should be the same +/- and like wise for the elevator/aileron mix or are you saying the two mixes should be equal?? If you mean the later, I think I have a problem!

Larry Rogers - R/C Helicopter Pilot

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07-13-2008 03:09 AM  9 years agoPost 15
Eury

rrProfessor

Dover NH

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No, each side will end up equal. My mixes for ail-elev and elev-ail were always off by a few points to get it to work. Just set it to whatever it needs.

Nick Crego

Citizen #0168

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07-13-2008 07:56 PM  9 years agoPost 16
AirWolfRC

rrProfessor

42½ N, 83½ W

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The equal settings is just a starting point.
There will always be slight variations that will need to be trimmed after first flight shows what's going on.

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