Mechanický tellurion

Fantastic amount of fun to build. The engineering in the gear train and movement is phenomenal.

one of the easier ones to build.

Excellent kit, a bit tricky to build but satisfying in the end.

My daughter liked it, but she didn’ t manage to put it in the right way, so at finish it didn’ t turn.
She had got plasure that d’hydrogéné week-end are enjoy!

Beautiful model. Works perfectly. I saw a review that the earth's axis doesn't tilt correctly, but mine does showing more or less sun on the northern hemisphere each summer (they should probably create several versions of part 126 for people elsewhere).

This was the first model I ever assembled. I broke a pieces 104 during step 3 on page 31, which taught me not to put pressure on a part from too far a distance. I received replacements (thanks!). For the rest, the connections click very well in place if you exert enough pressure (but be careful how because you can break things, see above) and the connections are surprisingly sturdy given the material.

I encountered a few gotchas during construction. It is easy to forget part 120 during step 2 on page 33 (e8 is not a single fixed thing). If you do, the moon will not move around. I was able to fix that by lifting part 123 and putting 120 in. The images om pages 27-28 are not entirely correct but that doesn't present a problem. One could also put part 126 in wrong and page 26 doesn't tell you correctly how. Also easily fixed.

After installing so many gears, I was quite surprised that it worked

Great product. Well illustrated, single-sentence polyglot instruction manual.

Not recommended for older, arthritic hands. I broke several pieces in setting up the pieces. Earth globe assembly is particularly fragile. Contacted customer service (user-friendly website) and they shipped replacement parts without cost, including free shipping (international mail).

Once finished, after many hours of focused attention in several sessions and some frustration, it's quite a rewarding experience to gaze on and teach others a model (it's just a model) for the mechanics of the phases of the moon and the seasons of the year based on ratios of wheel gears correctly engaged. A misplaced single piece can derail the whole motion, an important lesson in group work. Every manager and team leader should have one on their desk to show that a team is as strong as its weakest link.

I was pretty careful to make sure the gears moved smoothly before moving on the next part. Seem to work except for the moon doesnt move with the crank. Is it supposed to be connect? Or just to its own side gear to turn it? Instructions are not clear on that part.

My favorite model from UGears. Brilliant, complex design with surprising details: even the plane of orbit of the Moon is inclined with respect to the plane of orbit of the Earth. Amazing educational model, all in plywood.

This is only my second assembly, I took it slowly, being very careful to sand and wax as I went along and it works beautifully. I’ve already ordered 2 more clocks…