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HomeAircraftHelicopterMain Discussion › Swash levelling tool size
03-01-2018 01:39 AM  4 months agoPost 1
Olorin5

rrNovice

Taupo, New Zealand

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I know there are some adjustable tools out there but does anyone know off the top of their head a proprietary levelling tool that suits a 12mm mast and a swashplate diameter of 56mm, give or take a couple of mm? If anyone has an Align/SAB/other brand 700 size tool around that they can measure I would much appreciate it. Thanks in advance.

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03-01-2018 05:28 PM  4 months agoPost 2
niyot

rrApprentice

Baltimore, Maryland

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There are some swash levelers that have adjustable tabs to fit multiple swash types. Here is one but it does not look like its is located here in the states.
http://www.alphasportrc.com/catalog...323&language=en

Hood HeLi : RIP Roman

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03-01-2018 05:40 PM  4 months agoPost 3
chopper37

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NJ and Long Island

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my align one fits 550-800, just measured it should work for you.

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03-01-2018 05:59 PM  4 months agoPost 4
Richardmid1

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Leeds, England

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Out of stock but I use this one: https://www.fast-lad.co.uk/store/he...22-p-26650.html

60% of the time, it works every time!

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03-01-2018 06:02 PM  4 months agoPost 5
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

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The Align 600 / 700 swash leveler is 70mm in diameter (to the edge) - 35mm radius.

There is a flat pad on the ends of the "spider arms" that is 7mm, so it should handle any swash that is between 70mm dia and 56mm dia

It has a removable insert for 10mm and 12mm main masts.

I use it on my Goblin 700, Trex 700 and Trex 600.

I assume that it will also fit a Trex 550 since the 600 / 550 use the same swash parts and the heads are mostly interchangeable.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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03-01-2018 06:16 PM  4 months agoPost 6
Pistol Pete

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Seffner, FL

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Watch at YouTube

~~Enjoying the hobby one flight at a time~~

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03-01-2018 06:29 PM  4 months agoPost 7
grimthenoble

rrApprentice

Ketchikan, Alaska

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Pistol Pete, LOL! I think a guy could eyeball it as good as a zip tie could do it, swash plate leveler tool is a cheap item. They never said flying RC helicopters is for cheap @ss's

Never go Full Retard!

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03-01-2018 06:30 PM  4 months agoPost 8
ticedoff8

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Morgan Hill, CA. USA

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Richardmid1
Out of stock but I use this one: https://www.fast-lad.co.uk/store/he...22-p-26650.html
That's an interesting option.

I think they are in-stock at the manufacturer

At $12, I might buy one - it seems like a universal solution (8mm to 15m main mast and fits under the swash - not above).

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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03-01-2018 06:41 PM  4 months agoPost 9
Pistol Pete

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Seffner, FL

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grimthenoble
Pistol Pete, LOL! I think a guy could eyeball it as good as a zip tie could do it, swash plate leveler tool is a cheap item. They never said flying RC helicopters is for cheap @ss's
Definitely more accurate than the Eye-O-Meter.

Don't even have to remove head, just links from swash to grips.

Cheap versus resourceful? Just another "proven" option, that's all.

~~Enjoying the hobby one flight at a time~~

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03-01-2018 06:42 PM  4 months agoPost 10
ticedoff8

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Morgan Hill, CA. USA

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grimthenoble
istol Pete, LOL! I think a guy could eyeball it as good as a zip tie could do it, swash plate leveler tool is a cheap item. They never said flying RC helicopters is for cheap @ss's
Here is the thing you may be missing:
No matter whether it is flybar or flybarless, no matter what FBL controller you have and no matter how perfectly level your swash is on the bench, you still have to do a real hover test and adjust the swash links to minimize any drift that occurs.
And, there is always drift.

Assuming you understand why zeroing-out the hover drift is necessary (and how to do it), the zip-tie really does get you close enough.

Personally, I don't use the zip-tie.
I have leveling tools and I do try to get it as close as possible on the bench. But, it always takes one or two flights to zero-out the drift.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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03-01-2018 08:49 PM  4 months agoPost 11
ssmith512

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Indianapolis, IN USA

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ticedoff8
Assuming you understand why zeroing-out the hover drift is necessary (and how to do it)
Please explain!

I thought zeroing out hover drift is only if you need/want the helicopter to hover "hands off". I thought a swash that was not orthogonal to the main shaft would introduce differing cyclic-to-collective interactions between upright and inverted flying.

Maybe I have been doing it wrong all this time?

Thanks in advance.

Steve

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03-01-2018 09:21 PM  4 months agoPost 12
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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You want the swash level/ squared with the main shaft.
it doesn't matter if your bench isn't level.

In a hover you correct drift by adjusting the links to the swash.

I was wondering how long before someone mentioned the zip tie.
.

spending time, paying attention

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03-01-2018 10:30 PM  4 months agoPost 13
Doublah

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USA

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ICUR1-2
In a hover you correct drift by adjusting the links to the swash.
Never heard that before?

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03-01-2018 11:51 PM  4 months agoPost 14
Flyin for Jesus

rrVeteran

Troy, IL. 62294

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I use a pitch gauge to level the heli, then use it to level the swash, then still use it to setup the FBL, then continue using it to track blades.
I have never hover adjusted my helis, they all hold well. But I can see the benefit, I just don't do it.

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03-02-2018 06:05 AM  4 months agoPost 15
grimthenoble

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Ketchikan, Alaska

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I don't think even the most perfectly set up helicopter head will it ever stay hovering in one spot. Always going to take pilot command to keep it in one spot. The zip tie might work for some people but id rather do it with a proper tool, it makes me feel good. more than one way to skin a cat haha

Never go Full Retard!

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03-02-2018 09:26 AM  4 months agoPost 16
Olorin5

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Taupo, New Zealand

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Thanks for the input everyone, given me few things to check out.
ICUR1-2
In a hover you correct drift by adjusting the links to the swash.
I am also intrigued by this. Are you suggesting you level your swashplate in reference to the mast (by whatever method you use), do a hover check and then introduce a mechanical change to the links to the swash to counteract translating tendency, thereby putting it out of whack again?
Depending on your electronics setup and whether FB or FBL, shouldn't drift be taken care of either by a bit of cyclic trim (if you must), or by the gyros?

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03-02-2018 11:20 AM  4 months agoPost 17
CoachE

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Cincinnati, ohio -usa

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In my humble laidmin terms.... even if you have a perfectly mechanically leveled helicopter. The force of the tail rotor compinsaiting for the main rotor torque WILL create a drifting force. Yes you can try to compensate with aleron (rolling side to side) adjustments. But again as others have stated. "Chicken or egg" it is these challenges that make each persons final dialed in setup unique to thier personal prefrence. We have to over time and experience discover our methodology to what makes each one of us comfortably flying our machine. I am sure there are others that can give a much more technical explination but i like to keep thing as simple as possible.

Never stop pushing those questions it helps us all......

BD Team Pilot / Get !T - Got !T - Perfect !T

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03-02-2018 12:51 PM  4 months agoPost 18
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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Olorin5
ICUR1-2
In a hover you correct drift by adjusting the links to the swash.
I am also intrigued by this. Are you suggesting you level your swashplate in reference to the mast (by whatever method you use), do a hover check and then introduce a mechanical change to the links to the swash to counteract translating tendency, thereby putting it out of whack again?
Depending on your electronics setup and whether FB or FBL, shouldn't drift be taken care of either by a bit of cyclic trim (if you must), or by the gyros?
Yes the swash is always squared to the main shaft. It sits level perfectly squared.
If you have to correct for drift then you adjust the swash linkages.It has always been this way even for Flybars since I started.
And yes most FBL units don't have drift anymore

spending time, paying attention

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03-02-2018 01:44 PM  4 months agoPost 19
dkshema

rrMaster

Cedar Rapids, IA

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Gyros alone won't correct for drift due to the translating effect caused by the tail rotor.

Translation shows up as a force that is normal (perpendicular) to the main shaft. The roll-axis gyro will not see any roll motion to counteract, nor will the pitch axis gyro. The yaw gyro is already countering torque, but this too is unchanging.

A helicopter with a truly level swashplate will drift left or right (dependent upon main rotor direction).

Assuming the rotor turns clockwise (viewed from above), the heli will drift to the left, being pushed by the tail rotor.

To counteract the dift, right trim is required. Viewed from behind, in a hover, the right skid will be lower than the left, and the heli will lean about 2 degrees to the right.

The translation effect is present any time the heli is airborne, and is always in the same direction with reference to the airframe. It doesn't matter if you're hovering, in fast forward flight, inverted, or doing some crazy maneuver.

Even with your flybarless system finely tuned, you still end up adding just a touch of roll correction at liftoff, if you intend to lift off straight up.

To sense and correct for drift, your FBL controller would also need to incorporate accelerometers as well as gyros.

This isn't a "chicken vs egg" problem, it is simple cause and effect problem.

Physics is unforgiving, there is no way to defeat it.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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03-02-2018 03:27 PM  4 months agoPost 20
ssmith512

rrKey Veteran

Indianapolis, IN USA

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dkshema
Physics is unforgiving, there is no way to defeat it.
Clearly you have never visited a singularity.

Steve

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HomeAircraftHelicopterMain Discussion › Swash levelling tool size
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