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Old 08-29-2021, 07:13 PM
dremu dremu is offline
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Default Re: 1:10ish Alvis Stalwart 6x6 high mobility carrier, wrongest of the wrong

Speaking of trial and error in geometry, the crane was another pain point. I've done a crane before on my PLS (HEMTT, whatever), but this one is shaped differently. I also wanted to try and stay as close visually to the 1:1 as possible. The end result isn't quite right, mostly limited by the actuators available, but it has lots of range and strength.

The most annoying part is the junction between the main arm and the jib. Rather than being a simple single-point hinge, it's a compound one. See where the actuator doesn't actually push on the upper arm, but on part of the hinge? This allows greater travel at the expense of complexity and hair loss for me =))











See how that by the end of the cylinder's travel, the thing has folded in itself like it's double-jointed. Sorting out Just The Right Lengths of those components was time consuming, plus determining which part went outside and which inside.
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I mean, how hard can it be?

Last edited by dremu; 08-30-2021 at 01:00 PM.
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