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  1. pleegwat

    42126 - Ford F150 Raptor

    My most common disassembly tools with technic are an 8l axle with stop to push things out, or a pair of pliers (more commonly my teeth) to pull them out. Though the modern brick separator has a 1l axle attached it's generally not long enough for me.
  2. pleegwat

    Battleship with cannon

    Looks impressive. I agree proportions seem off for a simple cannon. I think it might work as a missile launcher, though I don't think those use closed barrels? Something futuristic could explain a fat barrel (plasma artillery maybe?) but anything which isn't a self-propelled projectile is likely to involve more recoil than this silhouette can handle.
  3. Even when losing the diffs (including everything related to diff locking)?
  4. pleegwat

    42129 - 4x4 Mercedes-Benz Zetros

    Is the steering motor on the axle or on the chassis (suspended or unsuspended)?
  5. My first thought seeing this was "Don't I own a set which motor-drives these?" Well yes indeed. 8539. The hubs have pinholes, but can be driven by putting a 16z gear inside them.
  6. That's not quite that simple. The motor has an internal brake and does not backdrive easily, but you do need to take measures to prevent the motor from back-driving the manual input.
  7. pleegwat

    Powered Up 3 Speed Auto Gearbox

    You can try the following formula: o = o * (1 - a) + i * a where `i` is the input, `o` is the output, and `a` is a scaling factor between 0 and 1. A higher `a` is more sensitive to input changes. Of course strictly this is not a running average - instead if `a` is 1/3, then the most recent input counts as 1/3, the second most recent is 2/9, the third 4/27, etc.
  8. pleegwat

    42129 - 4x4 Mercedes-Benz Zetros

    But they do regularly omit the centre diff in 4x4 vehicles.
  9. pleegwat

    Nico71's Creations

    According to bricklink, it uses 2742 out of 3696 parts.
  10. pleegwat

    42128 - Heavy-Duty Tow Truck

    I think any kind of suspension is unlikely on a set that has a lifting axle. I do expect a driveline. 2 rearmost axles, simple difs, probably a mini L6. We hardly ever see the large cylinder pieces any more.
  11. @Thirdwigg I did the B model, though likewise not admissible since it was posted before. And I may have taken too many liberties.
  12. pleegwat

    General Part Discussion

    True, but those don't always match the position you want to mount the hose in. In some cases a pin perpendicular to the bush direction in that piece would work better.
  13. pleegwat

    [MOC] 8868B revisited

    The mechanism has two pneumatic valves, both of which are actuated automatically. The forward valve is connected to the main arm (in the original using a lever mechanism, in mine using a gear) and controls the pneumatic cylinder in the rear of the cab.. As the arm tips over, this valve switches to the other position. Importantly, this valve is in neutral approximately when the arm is at its topmost position. The pneumatic cylinder in the rear has as its only function to toggle the rear pneumatic valve. This rear pneumatic valve controls all other cylinders - the two cylinders raising the main arm, and the cylinder (one large on in the original, two small ones in my version) which close the jaw. The cycle starts when the arm is in the forward position. Pressure is applied to close the claw and raise the boom. On the original, the claw tends to close first, as it has the lowest load. In my version, this does not work very reliably, as the internal resistance of the two small cylinders is too high. The big cylinders at the sides start raising the boom. Once the boom crosses its topmost position, the forward valve switches. This reduces the pressure on the forward system, as part of the pressure is diverted to the rear cylinder. However, the main boom tips over and falls to its rearmost position before the rear cylinder has much of a chance to move. The rear cylinder takes a second or so to fully switch the rear valve, inverting the direction on the front system This causes the front system to work in reverse. Again, the claw tends to move first (even in my version, if there is a load in the claw the claw will open before the boom starts moving). The boom pulls back forward, and as it crosses the topmost position the forward valve is switched again. After the forward valve switches, the boom falls back into its full forward position, and the rear cylinder moves inverting the front system back to its starting position. The loop repeats.
  14. I don't think you could get them to mesh reliably.
  15. pleegwat

    [MOC] 8868B revisited

    Exactly - the original required a more space-consuming lever mechanism. Between that and the steering axle sitting below the racks instead of above I've freed up quite some space, though most of it ends up sitting unused below the compressor unit.