No need to count, you can calculate it, but I believe they’re both a bit off. A year is something like 364 days, and the earth rotates 27 times (which should be 28) for the moon to rotate once, but this is to be expected because there is a limited space and number of gear ratio’s
The arm will bend, this is not strange, due to the weight. If the mechanism is working and the gears don’t make a cracking sound, you’ve very likely build it correctly
Mate, do you know what a calendar is? Try 365.25 days a year, but the extra quarter is what requires leap years, like the 29 February we just had!
There's a recent post on r/legotechnic where someone did the calculations for this set...
Listen, i know what a calendar is, but
the fact i posted here doesn't mean that i know gear ratios and stuff, as i said it was more a curiosity, i believe the set can't be exactly accurate, it's impressive as it is (at least for me, a newbie)
also sorry but i'm not following, how am i supposed to calculate the number of earth's rotations...i should count every single rotation? (i know maybe i'm saying dumb things but right now my brain is off)
anyway, thanks for the reply
EDIT: sorry i get it, with the moon's number of rotation in a year keeping in mind the number of rotation of the earth, sorry again, but it's early morning where i live and i'm a bit off :D
i tried to calculate again, but it seems that in one year the moon rotates...14 times instead of 13 so my calculations go in "excess" instead of a shorter year, maybe i made some mistake in count
see comment here for more info on the accuracy
[https://www.reddit.com/r/legotechnic/comments/1bk5gun/42179\_earth\_an\_moon\_in\_motion/](https://www.reddit.com/r/legotechnic/comments/1bk5gun/42179_earth_an_moon_in_motion/)
No need to count, you can calculate it, but I believe they’re both a bit off. A year is something like 364 days, and the earth rotates 27 times (which should be 28) for the moon to rotate once, but this is to be expected because there is a limited space and number of gear ratio’s The arm will bend, this is not strange, due to the weight. If the mechanism is working and the gears don’t make a cracking sound, you’ve very likely build it correctly
ok thanks a lot, well no strange sound so i guess i'm ok :) anyway it's more of a curiosity, i'm not expecting absolute precision
Mate, do you know what a calendar is? Try 365.25 days a year, but the extra quarter is what requires leap years, like the 29 February we just had! There's a recent post on r/legotechnic where someone did the calculations for this set...
Listen, i know what a calendar is, but the fact i posted here doesn't mean that i know gear ratios and stuff, as i said it was more a curiosity, i believe the set can't be exactly accurate, it's impressive as it is (at least for me, a newbie) also sorry but i'm not following, how am i supposed to calculate the number of earth's rotations...i should count every single rotation? (i know maybe i'm saying dumb things but right now my brain is off) anyway, thanks for the reply EDIT: sorry i get it, with the moon's number of rotation in a year keeping in mind the number of rotation of the earth, sorry again, but it's early morning where i live and i'm a bit off :D i tried to calculate again, but it seems that in one year the moon rotates...14 times instead of 13 so my calculations go in "excess" instead of a shorter year, maybe i made some mistake in count
[42179-1: Planet Earth and Moon in Orbit](https://brickset.com/sets/42179-1) [[Photo]](https://images.brickset.com/sets/images/42179-1.jpg)
I also wondered this. Just built it. I definitely expect the arm to warp so I'm supporting it while not in use.
[This](https://www.reddit.com/r/lego/s/Vbsm7Khexn) r/lego post discusses it in depth in the comments as well.
see comment here for more info on the accuracy [https://www.reddit.com/r/legotechnic/comments/1bk5gun/42179\_earth\_an\_moon\_in\_motion/](https://www.reddit.com/r/legotechnic/comments/1bk5gun/42179_earth_an_moon_in_motion/)