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HelicopterHIROBOOther › Sceadu SWM (CCPM) linkage question
12-21-2003 04:51 AM  13 years agoPost 1
mainblades

rrApprentice

Tucson, AZ USA

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Hello all. So here's the dilemna. I'm converting a Sceadu to SWM and the directions are something to be desired, Jeff G. is sending me a set for the whole SWM kit, but I want to work on it now. I need the measurement for the 3 linkages from the bellcranks to the swashplate. I'm sure they're all the same. Just need a place to start.

Thanks in advance

Greg Bartel
AMA 70898

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12-21-2003 05:13 AM  13 years agoPost 2
Brian Bennett

rrKey Veteran

Dugway/Tooele UT, USA

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Sceadu SWM linkage lengths

For my setup using the Aluminum SZ-IV rotorhead get +10.5 to -10.5 pitch range with no binding at the corners:

bellcrank to swashplate (3x) = 67 mm

Servo to bellcrank on right side (looking down on the heli with the tail pointed at you) = 98 mm
Servo to bellcrank on leftside (looking down on the heli with the tail pointed at you) = 134 mm

You will have to fiddle to get the pitch range where you want with the center stick at 0 degrees pitch. Just be patient and work it till its right.

Oh yeh those are measured center of ball to center of ball.
Hope this helps,

Brian

Team MRC-Hirobo and Model Avionics Rep

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12-21-2003 05:25 AM  13 years agoPost 3
Rotorhead

rrApprentice

Spokane, WA

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Maybe having the blades at 0 degrees pitch, making the bell cranks 90 with servos centered and then adjust the links to fit would work

To start with maybe, then you can change it all back to whatever the instructions say

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12-21-2003 06:55 AM  13 years agoPost 4
tonysrepair

rrVeteran

portland oregon

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My swm manual has the elevator lever /swash rod (center rod ) at 29.5 ,rod length measured between the ball links.
The aileron levers/swash rods (right and left rods) are at 30.0 mm between the ball links .
Mixing arm rods (2) 36mm between the ball links
swm elevator lever rod to servo 77.5mm between ball links
swm aileron lever rod to servo 62.5mm between ball links
swm aileron lever rod left side 100.5 mm between links
tail facing you

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12-21-2003 07:47 AM  13 years agoPost 5
mainblades

rrApprentice

Tucson, AZ USA

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Rotorhead you're a Smart Arse

I would do that if I had my EVO head parts and blades. As you know this is a winter project. Go do something constructive and try to get that vibe out of your Craptor 60. Not to mention you obviously didn't read, that I dont have the directions. Duh.

By the way, I'll need my Governor sensor back soon.

Greg Bartel
AMA 70898

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HelicopterHIROBOOther › Sceadu SWM (CCPM) linkage question
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