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About lmdesigner42

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    31070 Turbo Track Racer

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    Lego (obviously), Nerf, reading, chess, cycling


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  1. Love those tires, both the size and the tread. Something this large seems to be asking for an XL motor for steering (but probably not necessary)
  2. If so, I hope they do a better job on the drivetrain, 1WD instead of the real-life AWD would be disappointing. Also hoping the lines translate well to technic, that hasn't always happened with other small-scale cars.
  3. This model is really great with its combination of appearance, functionality, and performance. Thanks for sharing! Would it be worth using the new 12z spur gear and 20z with clutch spur gear (from the Airbus) in the gearbox instead of the double-bevel versions?
  4. Thanks for the praise @mitx2529, putting functions in a small chassis is hard. There's a lot of other good examples of compact builds in the other contest entries.
  5. We won't know until the reviews are out, but I wonder how they fixed the gearbox problems from the Osprey. I think the fuselage is 2 studs wider, maybe that helps?
  6. Thanks for the positive comments! @Erik Leppen the real rough-terrain cranes are very minimalist, which looks great but leads to rather tight builds for Lego versions. I agree that the carrier looks slightly too bulky, this could have been fixed maybe by going to a larger scale (62.4 mm wheels) or using bricks and plates for the chassis.
  7. 25. Mini Rough-Terrain Crane Functions: 4-wheel steering Synchronized outriggers Superstructure rotation Boom elevation Boom extension Winch with ratchet Detailed cabin Final size is 14x14x45 or 8820 cubic studs.
  8. All done! Final size is 14x14x45 or 8820 cubic studs. Time for the entry post. Features include: 4-wheel steering – Smooth 4-wheel steering with steering shaft running through the center of the chassis. Wheels are just the right size to allow a close fit with other chassis parts. Synchronized outriggers – 4 outriggers controlled with a black 12t gear on the left side of the chassis with a 1:1 ratio. Somewhat stiff, but the outriggers lock into the lowered position and lift the chassis slightly. Superstructure rotation – Controlled by black 12t gear on right side of chassis. Also rather stiff, since a 3L axle with stud is used to add friction. Boom elevation – XL linear actuator gives more than enough range of motion, a bit over 90 degrees. Boom extension – Dual winches are attached to the inside end of the extending section, wound in opposite directions. One string used for retraction goes through the back of the boom, the one for extension runs over the boom, around the end, and inside the top. Turning the 12t gear on the side one way retracts one winch and extends the boom, turning it the other way pulls on the other winch to retract the boom. A ratchet is included to prevent collapse when extended. Main winch – Includes separate ratchet and custom hook setup, strong enough to lift 9V battery box with batteries and PF L motor with the boom extended when at the right angle. The low weight of the crane is a greater limiting factor than the strength of the boom. Exterior details – Cabin with seat and control sticks, headlights, taillights, raised engine section, and hazard stickers. Size comparison with 42128: See more pictures at https://www.bricksafe.com/pages/lmdesigner42/mini-rtc
  9. I think the designer did an excellent job on the exterior of the Ferrari, maybe even better than the Sian. In comparison with 1:8 MOCs from 6 years ago, the new panels really help with smooth and clean lines. But, however well-executed and striking the exterior is, I still feel like these modern supercars lack the clean and simple beauty that older generations had. This is not the Lego designer's fault, but I feel like the bodywork and facias are too busy and less appealing compared to something like the 911. So I think I will save my money and see what the next installment in the 1:8 series brings.
  10. Sorry for the very late replies, need to turn on my notifications. @mdemerchant The boom will be extended by a piece of string (to be added) running over the top of the boom, inside, and then tied to the base of the extending section. There's a millimeter or two between the beams which allows the string to fit. @Jurss @2GodBDGlory Thanks for the positive comments on the boom! I borrowed the alternating triangle technique from a mobile crane I saw some time ago with multiple extending sections. I am pretty happy to have something sufficiently strong but only 3 studs wide. Current progress update: Outriggers are now working, all 4 are synchronized and can lift the chassis slightly. I'll need to work a little faster this week to finish in time for the contest.
  11. Good to know, thanks for the detailed explanation @johnnym. It's always great finding unexpected compatibility between different Lego parts.
  12. I like that idea, sounds very strong. How did you brace the 28z idler gear from the diff? It's only 0.5 studs thick if I recall correctly.
  13. I like your model! Great work! It's an excellent example of how flexible 8081's chassis and bodywork are for making many functional and aesthetic variants. Have you considered putting planetary hubs or 12/28 bevel gears (like new diff) into the axles to increase the gear reduction and torque?
  14. The new rims for the Ferrari have fivefold symmetry with the five spokes. It also looks like there's a black pin/pinhole at the base of each spoke. Is it possible there are new hubs with five pins/pinholes??