1st Place

PMC-Addison Model 62L Airport Utility Tractor - by AnHNWhiteCornet

Design: 9/10 (Instantly recognizable as an airport tractor)
Aesthetics: 10/10 (Looks outstanding!)
Details: 8/10 (Nicely detailed - even features some undercarriage bits!)
Build Quality: 8/10 (Very efficient part use, and great angles - especially on the front)
Basic Functions: 6/10 (Drives, but steering while accelerating is iffy.)
Advanced Functions: 8/10 (Working lights and windshield wiper)
Realism: 4/5 (Accurate scale and features, though the driving could use a little more work)
Description: 5/5 (Accurately describes what it is and how to use it. Also, nice work on the thumbnail)
BONUS: 4 (Very nice interior with moving controls and functional gauges).

The only negatives I have are super nitpicky things (it could use more weight in the front to help it steer better, etc.). Outstanding!

Total: 62 points

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2nd Place

pushback (simple) - by aurelienBTC3937

Design: 6/10 (It is simple, but it looks right)
Aesthetics: 5/10 (Very minimalistic style, the headlights could use some work)
Details: 3/10 (The only exterior details are the lights, and there's not much inside either)
Build Quality: 5/10 (Nice angling, but quite simplistic)
Basic Functions: 8/10 (It drives as it should, though the steering angle is rather absurd)
Advanced Functions: 5/10 (I wasn't able to successfully tow anything, but the picture is convincing. Interesting towing system though)
Realism: 4/5 (Seems to be the right size. Towing system is rather illogical, but looks to function well given SP physics and mechanics)
Description: 3/5 (It says what it is and how to use it, but there's little else).
BONUS: 1 (Has an interior)

Nice job replicating the overall look of a pushback tractor! I'm not entirely sure how to get it under a nose wheel, but the aircraft I tested on may simply have been incompatible for one reason or another.

Total: 41 points

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3rd Place

simple baggage car - by CR929thenewSPplayer

Design: 5/10 (You can tell what it is, but the proportions seem a bit wacky to me).
Aesthetics: 5/10 (Nice, but quite simple)
Details: 5/10 (Extra credit for the label artwork on the belt, but not much other than that)
Build Quality: 6/10 (No fancy techniques, but it looks good and all the parts are where they are supposed to be)
Basic Functions: 7/10 (Nothing falls off, and it is capable of movement. Also, the gauges in the interior function properly)
Advanced Functions: 0/10 (No advanced functions)
Realism: 2/5 (Good scale, but the driving is far from realistic)
Description: 2/5 (At least it credits who made the plane in the background).
BONUS: 1 (Has an interior)

The small wheels have a huge effect on handling. Nice cab shaping though.

Total: 33 points

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Honorable Mention

Ground Support Challenge SUBMISSION - by LuckyTurbulence

Design: 4/10 (A very blocky fire truck, but a fire truck nonetheless)
Aesthetics: 3/10 (It looks like three boxes stuck together with a person on top)
Details: 4/10 (Nice ladder and grille, but very little else)
Build Quality: 3/10 (Nothing innovative in terms of building techniques)
Basic Functions: 5/10 (It drives, but is pretty top-heavy)
Advanced Functions: 5/10 (Ladder can reach anywhere within its length, but can tip the truck when turned sideways.)
Realism: 3/5 (It's functional as a fire truck, and you can move the ladder around and shoot "water").
Description: 3/5 (Has instructions, but that's about it)
BONUS: 1 (Water cannon)

This looks kind of like something I'd expect to see in Minecraft (which isn't necessarily a bad thing). I'd suggest experimenting with combining smaller shapes to make more intricate shaping, like what you did with the firefighter.

Total: 32 points

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Thanks to everyone who entered! Rewards will be distributed in accordance with the site cooldowns.