LEGO Technic 2024 - Planet Earth and Moon in Orbit - LEGO 42179 Speed Build Review 

Yep.. I replaced the handle with a gear and that's it for modding this build for me. Now I can use my old Lego train controller and a 35 year old Lego motor with wormgear attached to it to motorize it by putting the wormgear on top.😅 But the train controller and 35 year old motor look ugly so next month I'm gonna order a modern Lego motor and battery pack for this set.

From what I read it's 1.75 days short per year (364.5 instead of 366.25 sidereal days) and 8 hours on the moon (27 instead of 27.3 days)

@@Stereomoo Huh, surprisingly accurate!

Moon orbits at 5 degrees to ecliptic so the model show way too many eclipses :-(

@@spudgossie Ah :(

I also purchased the set and calculated the gear ratios. One of the important points is that since some gears have axles that rotate respective to the base frame, it is technically a planetary gear system. The crane rotates at 1/121.5 of the input crankshaft. The 20-tooth gear (1) that transmits power to the crane rotates at 1/3 of the input, which is 79/243 measured from the rotational frame of the crane. The sun rotates at 1/3 of that angular velocity respective to the crane. Thus, respective to the base frame, the sun rotates at (1/3)(79/243)+2/243 = 85/729 of the input. The revolution of the moon in this set has the same angular velocity as the rotation of the sun, which means that a sidereal month takes 729/85 cranks. The rotation of the earth, in this model, is powered by the 24-tooth gear below it, which rotates 3 times for each rotation of the 20-tooth gear(1), measured in the frame of the crane. thus, the 24-tooth gear rotates -79/81 time for each crank input (negative sign indicates that the gear rotates in opposite direction as gear(1) ). Measured in the base frame, this corresponds to -235/243 rotation each crank input. The earth rotates at thrice that speed in the positive direction in the base frame. Summary: 1 crank on base = 1/121.5 years = 85/729 solar rotation or sidereal month = 235/81 sidereal day 1 year = 14.1667 sidereal month = 13.1667 synodic month 1 year = 352.5 sidereal day = 351.5 solar day

Lego Technic were also the first series of Bionicle in 2001 :)

that's nice to hear :)

Will come......

There still a thing 😅😅😅😅😅😅😅😅😂😂😂😂😂😂😂😂😂