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Home✈️Aircraft🚁HelicopterCentury Radikal G20-30 N640 Hawk Predator › NX swashplate measurements?
02-22-2010 11:01 PM  10 years ago
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David Aldridge

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Austin, TX - USA

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NX swashplate measurements?
I'm looking to buy an "NX dual ball bearing swashplate" pictured below to replace a defective one from another brand helicopter, but I need some dimensions.

Below is a picture of my current swash, with indications of the measurements I need. I'd appreciate it if any of you Century owners with the swash above could help me find the numbers...

Here's a legend for the dimensions:

A. Distance from main shaft to center of ball link for servo linkages
B. Distance from main shaft to center of ball (shorter ball, upper portion of swash)
C. Distance from main shaft to center of ball (longer ball, upper portion of swash)
D. Distance from main shaft to end of anti-rotation pin (I would purchase the required pin from the Predator parts list)
E. Main shaft diameter
F. Diameter of a ball link (hopefully the same for all balls on the swash)
G. Length of anti-rotation pin
H. Diameter of anti-rotation pin

The measurements I have for my current swash are:

A. 27mm
B. 13mm
C. 16mm
D. 39mm
E. 10mm
F. 4mm
G. 16mm
H. 2mm (slightly larger than 2mm, but less than 2.5mm)

Hopefully the numbers for the NX swash are "close enough"...

Thanks a bunch for any info you can provide!

Cheers,
David
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02-22-2010 11:18 PM  10 years ago
rotormonkey

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Ottawa, ON - Canada

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As luck would have it, I just happened to have a swash lying around and my calipurs handy. Here's what you're looking for:

A. 28mm
B. 16mm
C. 16mm
D. 37mm
E. 10mm
F. 4.75mm
G. 13.5mm
H. 4mm

Note that B and C are the same as the balls off the top portion of the swash are all the same length. You can swap them out for shorter balls if you have 'em though. You can order a ball set separate from century, or if you already have balls that are a 3mm thread, they'll work too.

Saving that I think I might have some extras I wouldn't mind mailing out to you should you need them.
If it can't hover, it ain't worth flying.
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02-22-2010 11:19 PM  10 years ago
rotormonkey

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Ottawa, ON - Canada

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That's odd.. I just noticed in the pic that you posted, the swash does have long and short balls on the top portion.. Mine doesn't. And I JUST opened the packaging it was in. Weird.If it can't hover, it ain't worth flying.
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02-22-2010 11:39 PM  10 years ago
David Aldridge

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Austin, TX - USA

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Thanks for the reply, rotormonkey!

Those measurements are soooo close, but I think the ball diameter is going to screw me... I'm guessing by looking at my picture that the threads on my balls are NOT 3mm. Given that the ball diameter is 4mm on mine, I'm betting they're 2mm, so I wouldn't be able to use mine in the NX swash... Nor, given the washout base, etc. design on my heli, I couldn't switch all my links to those that fit the Centry 4.75mm balls.

Bah. You wouldn't happen to have a spare NX swash lying about that you could loan me for a week or two (I'd pay shipping both ways)? Century's return policy unfortunately doesn't allow me to open the package on a new one and return it...

Crap, and my swash (and most other parts) is twice the cost of the Century. Anybody want to buy a Kyosho?
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02-23-2010 01:00 AM  10 years ago
rotormonkey

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Ottawa, ON - Canada

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Why not, PM me your address and I'll send it off to you at some point in the next week or so.If it can't hover, it ain't worth flying.
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02-23-2010 01:49 AM  10 years ago
David Aldridge

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Austin, TX - USA

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PM sent - thanks a bunch!!!
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