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Home✈️Aircraft🚁Helicoptere-AlignT-REX 450 › Washout assembly position at HIgh stick
07-31-2007 07:23 AM  13 years ago
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zsultan

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Washout assembly position at HIgh stick
My wash out assembly has 2mm clearance from Head at high stick, is it ok? Swash is not binding with the frame at low stick with ailerons and elevator at max position.

I read some where that washout assembly should almost touch the head at high stick.

Please advise if my setting is ok

Thanks
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07-31-2007 12:31 PM  13 years ago
TomRex

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read some where that washout assembly should almost touch the head at high stick.
True. A pitch gauge will help you decide where pitch center is! 10*up-10*down is good enough to get you in the air. If you have the pitch center off you may get 8*-12* either the servo to head links need adjusting or the swash to head needs adjusting, or your swash AFR needs adjusting. Remember, zero pitch at center stick. fwiw
Ignorance is the absence of facts.Stupid is lacking the intellectual capacity to comprehend the fact
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07-31-2007 03:47 PM  13 years ago
zsultan

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TomRex,

I am getting +10 at High stick, 0 at mid stick and -10 at low stick without the swash binding. But the washout assembly has around 2mm gap from the head at high stick, Do you think it's ok? or should i move the swash little bit more to the top?

Thanks
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07-31-2007 04:10 PM  13 years ago
gmebey

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Check out the link below (remove the "-" )
http://www.heli-freak.com/viewtopic.php?t=12455

There are some setup videos that are rather good. The one that you are interested in is the CCPM Part 2.
"Once you are in RC you are in for life. You may go away but it will draw you back." By an
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07-31-2007 04:28 PM  13 years ago
TomRex

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The vids are a great addition to the heli community and have helped many a flyer!
Tha washout base can go to the extreme if needed. If the pitch is good a center stick and the pull seems equal upright and inverted then leave well enough alone, except if you're looking for more pitch.
The pitch AFR is where you can ad more to the throw by increasing value. The ability to pitch manage varies from flyer to flyer so set things up to where you're comfortable. Please be carefull to take into consideration the rpm range and batt C' rating, esc heat, motor heat etc. A little fidgiting around can yeld a well rounded flying heli with a bit of care and effort.
Ignorance is the absence of facts.Stupid is lacking the intellectual capacity to comprehend the fact
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07-31-2007 05:23 PM  13 years ago
zsultan

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Thanks TomRex,

So its not important to move the washout all the way to the top if you get -10, 0, +10 pitch, ofcourse with out swash binding ? Did i get that right?
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07-31-2007 06:18 PM  13 years ago
bilbo

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There is nothing really wrong with having a gap between the washout bushing and the head. The only reason it's recommended to make the washout block almost touch the head block at high stick is to maximize collective travel. So if you're already getting as much collective and cyclic throw as you want without binding then there's no real reason to change anything at the moment.

That said, I do think it's a good idea though when assembling a heli to set it up mechanically to maximize travel, and then use the transmitter programming to reduce throws to the desired level. That way you can easily increase throws later if you want just from your transmitter.
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08-01-2007 03:05 AM  13 years ago
zsultan

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I am getting -10, 0, +10 pitch by setting swash mix to -57%, and my AIL and ELE mix is at -45%. How much cyclic throw is optimum for 3D and sport flying? how do you determine that?

Thanks
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08-01-2007 04:46 AM  13 years ago
bilbo

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It's just personal preference. But a good starting point, as recommended by Finless in his Trex assembly videos, is -10/+10 collective, and -6/+6 degrees deflection for cyclic.
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08-01-2007 07:22 AM  13 years ago
zsultan

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Is it ok to have +10/-11 pitch or both negative and positive pitch has to be same? My pitch swash mix is at -60% (DX7) I am not yet doing 3D, just about to start practicing loops and rolls on simulator.

Please advise.

Thanks
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08-01-2007 10:32 AM  13 years ago
pani

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Hi Bilbo,

Can you please advise how we measure the cyclic throw in degrees??

Cheers
Panos

Sultan, my DX7 is at 70% and I have +11/-11.
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08-01-2007 11:10 AM  13 years ago
TomRex

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A pitch gauge on the paddle and the stick thrown to one side.

Ignorance is the absence of facts.Stupid is lacking the intellectual capacity to comprehend the fact
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08-01-2007 11:42 AM  13 years ago
pani

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Ahhh,
this is why I'm getting all these (*&@#*#% things going on. I assumed that the default values on the swash mixing on my radio were ok (65%). Jesus, I am kind of running at least 11 degrees both cyclic controls. No wonder why the thing was so twitchy..

Thanks Tomrex for all the help
A pic would be cool if it's easy for you mate.

Thanks Again
Panos
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08-01-2007 12:28 PM  13 years ago
pani

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Thanks Tomrex!

Sultan, correction. My swash mixings on the DX7 are now: Pitch 60% that gives me +11/-11 very close to yours. Probably we have different lenght from servo hole to center. I now have about 8 degrees on the cyclic with values of 40%. Will go out and try and flight it later...

One word of caution. The DX7 does not seem to keep settings when changed after the low voltage warning goes off at 8 volts. This is the second one, first one going off at 8.5 if I remember correctly.

Tomrex and Bilbo again many thanks...
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08-01-2007 12:31 PM  13 years ago
pani

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Tomrex are you actually running 11-12 degrees cyclic??
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08-01-2007 12:59 PM  13 years ago
TomRex

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Actually around 14-15 with Gorilla paddles/weights and a 220mm flybar. I can't give you an exact number because the gauge doesn't go that high. The head speed I use is 3000-3200 so the G'forces tend to calm it down. Its still pretty tame but quick when needed.
I use about the max settings on all controls because my hands won't go as fast as my thinking, meaning its very responsive to the average guy. I tend to setup most of my RC stuff this way and barely move the sticks to go where its wanted.
Ignorance is the absence of facts.Stupid is lacking the intellectual capacity to comprehend the fact
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