Thunder Underground

Want to get the scoop on future CFL leagues? This is the place to find early discussion.

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Re: Thunder Underground

Post by BEES » Thu Aug 02, 2018 11:00 pm

Interesting... I don't have to enter all weight classes...

Kind of like that actually.

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Hooray For Lexan
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Re: Thunder Underground

Post by Hooray For Lexan » Sun Sep 09, 2018 8:33 pm

Uh yeah I'm entering stuff. Entries coming at some point.



Anti-spinner config
Forks config
Anti-hammer config
Flipper range of motion (shown with no modular armor apart from short spatula. Would not actually fight like this.
Flipper range of motion, side view


Speed: 8
Traction: 7
Torque: 2
Weapon: 4
Armor: 9 (+2 front wedge or shock-mounted top plates)

More fandombots! I've been wanting to make a bot based on Ori from Ori and the Blind Forest for like a year, but I didn't know what kind of weapon would be a good analogue to his iconic Bash (aka reflect projectiles or enemies one direction and throw self in the other direction) ability. I mean, besides a punching bar, because those suck.

Anyway, Ori is a featherweight 2WD four-bar flipper. The weapon is powered by a gas spring, which is basically a pneumatic cylinder without the ports or entire rest of the pneumatic system. The flipper is retracted by a powerful gearmotor-driven winch winding a thick Kevlar cord. Once the flipper is fully retracted a catch engages to hold it in place and the winch is automatically unwound so it won't create any extra friction. Pushing the catch free fires the weapon. The flipper can fire approximately every 3-4 seconds, and since the retraction is electric won't run out of shots or reduce in power during a match. Also, because the flipper is held in place by the catch when in the ready position, the bot's weight is in fact resting on the spatula at the end of the arm, so it acts as a 2WD wedge. Ori has a brushless drivetrain capable of reaching about 20 MPH. He can run upside-down and self-right using the flipper. A 2-1/2 foot flip height (vertical stroke of the arm is about 6") is plenty to self-right since featherweights are physically small.

There are four modular wedge/armor configs. The first is a long spatula and steel plates bolted onto the sides of the wedge. The second removes the spatula entirely and uses a pair of steel plates with long pontoon-like forks, to counter the inevitable "lol angle-in" strategies. In this config the flipper is NOT flush with the ground: the bot's weight rests on the forks instead. The third config uses a shorter spatula on the flipper and a set of 3/4" UHMW blocks covering the wedge to protect against horizontal spinners. The fourth has no additional armor plates on the wedge, and instead uses a short spatula on the flipper and a set of shock-mounted top plates covering part of the top in the hopes of having some defense against hammers and other overhead weapons.

The percentage of the robot's chassis surface area receiving an armor bonus is as follows: 29% when using the long spatula or forks configs, 30% using the UHMW blocks (the UHMW ones are a little taller), 32% in the anti-hammer config, where the shock-mounted plates receive an armor bonus.



Speed: 5
Traction: 4
Torque: 1

Ko Config
Weapon: 13
Armor: 7

Ken Config
Weapon: 11
Armor: 9 (+2 front wedge)

Nen Type: Specialist

Terpsichora is a Pulsar-style drisc spinner based on Neferpitou from Hunter x Hunter. There are two configurations. "Ko" configuration has a relatively thin, bolted-on wedge with sharpened forks that can get underneath the defenses of almost any opponent, and the deadly claw-like discs are at full speed. "Ken" configuration ditches the forks in favor of a thicker, shock-mounted wedge for fighting powerful spinners. To make weight the weapon battery has to be replaced with a smaller, lower-voltage one, which reduces the weapon's rpm, but those claw-like teeth can still grab and launch opponents, and hit hard enough to be dangerous.

Can self-right by the weapon hitting the arena floor.

Alternate Configs:
Four-pronged Plow
Two-pronged Plow
ABR Plow
Anti-VS Plow

Speed: 6
Traction: 5
Torque: 2
Chassis Armor: 7

Normal Configs - Four-pronged Plow and Two-pronged Plow:
Weapon: 10 (3-point saw arm)
Armor: 7

Anti-Spinner Configs - Anti-VS Plow and ABR Plow:
Weapon: 8 (3-point saw arm)
Armor: 9 (+2 front plow)

I actually built a sawbot! Meet Manglerfish, which is actually based on multiple deep sea fish including a Stoplight Loosejaw. Has a selection of sturdy shock-mounted plows and a diamond-coated rescue saw blade. Two of the plow options, the ABR and Anti-VS Plows, are extra-beefy to stand up to spinners, but their heavier weight means some of the weapon batteries have to be removed, making the saw a bit less effective.

The saw arm has a range of motion of 180 degrees, from All the way behind the robot to extending slightly below the front forks. The saw actuator uses a harmonic gearbox with a friction clutch, so it can move freely in impacts but it won't flop around under its own weight. This allows the arm to easily be held at any angle. If it's being kept behind the robot, the springy "lures" on top help prevent wheelies. The fangs on the saw guard are soft plastic.

Note: the back of the chassis has a bevel to prevent high-centering. Also note that the ABR plow has thick "ears" on top extending an inch above the chassis to help stop high-mounted spinners.

Starfish Prime
Speed: 4
Traction: 3
Torque: 1

Undercutter Config: Weapon 15, Armor 7
Flail Config: Weapon 14, Armor 8 (+1 weapon bar and flails)

Starfish Prime is a horizontal spinner with a special party trick: it can fight as either an undercutter or a flail!

How the config change works: First, the drive wheels. In the undercutter config the wheels stick out both the top and bottom, allowing Starfish Prime to run either way up. For the flail config they are replaced with smaller wheels mounted an inch higher. These ONLY stick out the "top," which really becomes the bottom: in the flail config the entire robot is upside-down.
The flail config is not invertable. It can also start inverted in undercutter mode. The power switch access holes are on the back of the robot to allow safe inverted powerup. Second, a pair of standoffs (shown here) are attached to the frame to allow the flail to clear the ground in front. In either config the tips of the weapon are about 4" off the ground in the front when the chassis is inverted. Third, the weapon drivetrain has two stages of chain reduction from the LEM-200 motor, with a friction clutch on the intermediate shaft. The first stage has a 2.5:1 ratio, the second stage is 1:1 in undercutter mode and 2:5:1 in flail mode. Accounting for aerodynamic drag, this gives the 42" long bars and the 10 ft diameter flail about the same tip speed of about 250-270 MPH.

Finally, the weapons themselves. The two undercutter bars - one straight and one curved - are 42" long, weigh about 90 lb, and store 80-90 kJ at 2,000 rpm. The flail assembly consists of a 5' long, 57 lb central bar and two 10 lb flail teeth at the end of 2' long Kevlar ropes, giving a total diameter of 10 feet (accounting for the height of the impactors). Each flail stores about 30 kJ at 750 rpm, with the central bar storing an additional 13 kJ. While the flail bar is longer and thinner, it's a slightly softer steel and is tempered to be springy, or worst-case bend slightly if it takes a direct hit, and the flails' ability to move reduces the stresses on it. The flail bar also has over an inch of vertical clearance from the chassis. The flails' central bar is long enough to keep them from getting caught on the chassis.

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Re: Thunder Underground

Post by NoiseyGiraffe » Mon Sep 10, 2018 6:38 pm

FW - Little Labyrinth - My Reddit entry now has a little sister. Little Labyrinth is an adaptable bar spinner, meaning it can be either a horizontal or vertical bar spinner depending on which side it is driving. It does this by using four brushless motors powering an angled wheel each at each edge of the robot so it behaves like a regular 2WD robot. The body has been designed so that can't get stuck it will always land onto it's wheels. The bar is 360mm long and is powered by four brushless motors.

Speed: 4 / Traction: 2 / Torque: 1 / Weapon: 14 / Armour: 9 - CAD -



LW - Killjoy 3 - An invertable 2WD robot with 360° lifting jaws designed to grab opponents, lift and push them around the arena. Drive electronics are under hardox wedges and the weapon motors are within the arms itself. The arms can push itself over and self right it.

Speed: 6 / Traction: 5 / Torque: 3 / Weapon: 4 (Lifter: 3 / Clamp: 3) / Armour: 12 - CAD -



MW - Vortex 3 - Vortex continues with its' experimental 4-bar mounted drum spinner. The drum is now mounted on a longer arm allowing for a bigger punch from the 4 bar flipper. This is on a new screw propelled chassis to allow it move sideways as well as forwards, backwards and rotate left and right. The front wedge is 10mm Hardox and has a hinged skirt to allow it to get under opponents easier. It is invertable and can use the 4-bar drum spinner to self right.

Speed: 6 / Traction: 4 / Torque: 3 / Weapon: 7 (Lifter: 5 / Drum: 5) / Armour: 10 (+1 front wedge) - CAD -



HW - Vertigo 4 - My trademark vertical spinner has been redesigned yet again. Now featuring completely brushless 2WD and weapon motors, a new 10mm thick front wedge with ground scraping tongue and "anti-angle in" skirts and chassis mounted magnets to help eliminate gyro-dancing. The bar also self rights the robot when flipped.

Speed: 5 / Traction: 3 / Torque: 1 / Weapon: 13 / Armour: 8 - CAD -



SHW - Titan - A 4WD Brick with mecanum drive so it can keep its pneumatic scoop can always facing the enemy. The pneumatic scoop is a low pressure system for a more flips during a fight over potential OOTAs. The scoop can self right it and there are side skirt to stop other flippers getting underneath.

Speed: 5 / Traction: 5 / Torque: 3 / Weapon: 3 / Armour: 14 (+1 scoop) - CAD -


Last edited by NoiseyGiraffe on Wed Jan 02, 2019 5:26 pm, edited 5 times in total.

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The Monsterworks
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Re: Thunder Underground

Post by The Monsterworks » Fri Sep 14, 2018 2:44 pm

Death's Head Sarsaparilla

Death's Head Sarsaparilla by FloatingCastleRobotics on Sketchfab

What would happen if a battlebot met a late nineteenth century locomotive boiler met East Kentucky moonshine? I honestly don't know how many people would even think to ask that question, but here's the answer anyway! I swear I wasn't drinkin' any of the stuff when I made this.

Barrel aged to perfection and supreme potency is Death's Head Sarsaparilla. A diesel-powered shell spinner (I'd have liked to do steam, but that's just not even close to viable), it uses its functional smokestack as a self-righting pole. A close examination reveals the filigree work on the teeth and parts of the shell, as well as spoked chrome wheels supporting whitewall tires, loosely based off of the 1930s-era Auburn Boattail Speedster. But dontcha go thinking this diabolical contraption is all show and no go. Step up and take a shot at your own peril.

Stats: TBA

Elrathia 2

Elrathia 2 by FloatingCastleRobotics on Sketchfab

Given the walker nerf and the hammer nerf, this thing is just here to look pretty. Stats TBA.
Last edited by The Monsterworks on Sat Nov 03, 2018 12:14 pm, edited 3 times in total.

Evil Toaster
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Re: Thunder Underground

Post by Evil Toaster » Sat Sep 22, 2018 4:47 am

Team wait what

Bot name: A.M.M.N.O

A simple boxy heavyweight bot with a spinner beater bar and a tail in the back, along with simple extensions off the wheel guards to try to help out with it not getting stuck. Mainly designed to fight most bots with wedges or vertical spinners but can take a few hits from anything else



5DF7CED4-2672-4D06-902B-F8482DA2A6BF.jpeg (46.99 KiB) Viewed 600 times

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Re: Thunder Underground

Post by Hiicantpk » Thu Sep 27, 2018 12:25 am

Maybe not?

LW: Tidal Wave 2
Shields off

MW: Chronic Jobber

stats tbd
Last edited by Hiicantpk on Tue Dec 11, 2018 8:17 pm, edited 2 times in total.
".. if Kody is removing OOTAs, I'm flying to Canada for the sole purpose of taking a shit down his chimney. :v: " - GF93

Team 57

LW: Tidal Wave II
MW: Chronic Jobber
HW: Bass Drop II
SHW: Lifter 2: Electric Boogaloo

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Re: Thunder Underground

Post by Cha0sFerret » Sun Oct 07, 2018 3:47 am


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Re: Thunder Underground

Post by Plerco » Sat Oct 13, 2018 1:56 am

Idk how entering tournaments and stuff works here, but I'll give it a shot

Featherweight- Wormhole
A zippy vertical spinner with the spunk and energy of Brutus, but hopefully a bit more appeal in the looks department.
Speed: 6
Traction: 4
Torque: 1
Weapon: 12
Armor: 7

Blatant Mecha Rampage clone. Huge wingspan, no hubmotor, and capable of landing some pretty devastating blows.
Speed: 4
Traction: 3
Torque: 1
Weapon: 14
Armor: 8

HW- Riddle
A gigantic dual vertical spinner aiming to outdo HUGE as the tallest vert. Easily self rights with the huge force of its gigantic weapon, with ground scraping wedges to encourage engagement with the bars.
Speed: 2
Traction: 1
Torque: 1
Weapon: 16
Armor: 10

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Re: Thunder Underground

Post by Rocket » Fri Nov 02, 2018 3:04 pm


FW: Tree Surgeon 2
Tree Surgeon 2 picturesShow
Speed: 5 | Traction: 3 | Torque: 1 | Weapon: 11 (10/10 saws, 3-pt arm) | Armour: 10 (+2 wedge prongs) | 2WD | Static wedge

Returning with a highly revamped setup in no way inspired by a certain Mr. Go, Tree Surgeon 2 is sporting the two most powerful chainsaws in Thunderground, which is a bit like calling someone "the most beautiful girl in the burns unit". The most obvious point of departure from the previous model is the chainsaw, both in number and orientation, but the drivetrain has been altered from tank tracks to 2WD for a much improved wedging game aided by the stabilizing tail. The wedge forks are also serrated, meaning that in theory it's harder for opponents to get off as they snag in wheel bays and so forth, thus meaning that we can go full Razer and have the opponent beached on the wedge taking more and more damage for the entire fight. Finally, the slightly underwhelming snaptrap mechanism is no more, replaced with an actuated arm that whilst slower is a lot more reliable. This is a much-improved machine and one that, almost uniquely among Team Worst Swordsman's stable, has some hopes of troubling the playoff berths in a manner beyond simply playing spoiler to more conventional robots. We do things differently around here, and while that usually means "badly", it doesn't have to any more. =]

GPODAWUND picturesShow
Orth shot without side skirt
Overhead oblique
The memery continues
Speed: 7 | Traction: 5 | Torque: 2 | Weapon: 5 | Armour: 11 | 2WD | Hinged wedge

GPODAWUND takes the design ethos of ROBOT2 bad ideas machine Hobart and... goes in completely the opposite direction, favouring a low-power, high-torque eggbeater drum and enough armour to survive global thermonuclear war. Its fast drivetrain and removable hinged wedge plates on the front allow it to take on spinners and beat them at their own game, and its weapon, while not hugely powerful, is able to fling its opponents around. It's also the first invertable bot I've ever entered into a competition, though its self-righting mechanism consists of ramming its face into the opponent and hoping that the resultant bounce is kind. It's a tough little machine designed for speed and staying power, and here's hoping it doesn't go 0-16. =]

Dragonfist pictureShow
Speed: 3 | Traction: 1 | Torque: 1 | Weapon: 16 | Armour: 9 | 2WD | Full-body spinner

With revisions to the internals making it a lot more reliable, Dragonfist is back and better than ever! Team Worst Swordsman's sole previous playoff hopeful is returning with its weird combination of horizontal flails and shell spinning. The weaponry now hits quite a lot harder, and we were able to skimp a bit on armour to get the shell up and running at full damage capacity. With the power turned up, Dragonfist is here to show people once again that flail meta is best meta. =]

Tabor Mark 3 picturesShow
ImageOblique shot
ImageTop down. Please note that the scoop isn't flush with the ground in this shot, and is instead at about a thirty-degree angle. When it is, there's plenty of room for the turret to turn without the scoop getting snagged on anything.
ImageThe meme will never die.
Interchangeable scoopsShow
Type 1 Meme-Sized Plough; shot here to demonstrate ground clearance, hence why the side skirts are missing.Image
Type 2 Anti-Rambot Wedge, the anti-monstertrucking spikes of which actually contain some very small Egyptians.
Type 3a/b Anti-HS ABR Plough. 3a is a plain wedge, 3b is the one with the teeth.
Type 4 Omni-Directional Assault Spatula
Speed: 6 | Traction: 4 | Torque: 3 | Weapon: 7 (5 turret / 5 lifter) | Armour: 10 (+2 lifter) | 4WD | Omni-Directional Assault Spatula

She's back, baby. Tabor Mark 3 is a very different beast from the falling-over-trons of competitions past. She's now sporting a much longer wheelbase, hinged side skirts, shock-mounting for the arms as well as on the interchangeable scoops, a completely rebuilt turret (complete with branding and a pretty sick logo), and a snazzy new paint job. All things being equal, the old girl should now be able to lift much more effectively and without pitching forward all the time, which I hear helps. With powerful drive and defensive prowess, it might finally be Tabor's time to shine. Do your worst.

Labrys 2 PicturesShow
Speed: 4 | Traction: 2 | Torque: 1 | Weapon: 17 (13 spinner / 13 axe / 4 clutch) | Armour: 6 | 2WD | Forked Wedge

A refinement of the original lesbian combat robot, Labrys 2 is a much improved design from the original chunky 4WD version, featuring better disc placement and a wedge that can actually wedge stuff. Its wide stance and short, fat drisc helps it to control its gyroscopic forces, meaning it can turn better, and it also features stabilizing tails so it doesn't hop around as much when firing the axe. Said axe has been beefed up considerably too, with a full 13 power for dealing with unpleasant bricks, thus making it one of the few truly effective two-weapon bots in the competition. Here's hoping, anyway.
"The world's best swordsman doesn't fear the second-best; he fears the worst swordsman, because he can't predict what the idiot will do."

Active Roster:-
Cherry Bomb Classic 3
LW: HOBART 2: FEAR NAUGHT (1-2) (Lifetime: 4-6)
MW: DRAGONFIST (2-1) (Lifetime: 7-7)
HW: TABOR MARK 3 (3-0) (Lifetime: 7-8)
SHW: KEGATRON (0-3) (Lifetime: 0-3)

Mobilize, Britbongs!
HW: AD ASTRA (0-0) (Lifetime: 0-0)
HW: VICTORIANA (0-0) (Lifetime: 0-0)

New Era 2: Electric Boogaloo

Full Roster
Lifetime Figures: 22-33 (0.400)

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Re: Thunder Underground

Post by GF93 » Sun Dec 09, 2018 7:38 pm

Alex V is return

FW - ???

LW - ???

MW - ???

HW - ???

SHW - ???

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Re: Thunder Underground

Post by Shaba117 » Sat Dec 15, 2018 1:49 am

Running all classes except Featherweight. Will also offer to write, as well (hopefully my Spring semester classes aren't too crazy)

LW: The Thieving Magpie



2WD rear-hinged pneumatic flipper-can OOTA opponents over relatively low walls & easily self-right.

STATS: SPD-7 // TRA-6 // TOR-2 // WPN-5 // ARM-10

MW: Harpy



Nachtfalke's little Sister...4WD ramming 'brick'-can run inverted (though a bit less effective when running inverted with the plow). Both spikes/plow are hinged.

Stats: SPD-8 // TRA-8 // TOR-3 // WPN-0 // ARM-11 (+2 plow)

HW: Death Metal


Still as onerous as ever and seems to just randomly 'glitch' just to piss me off (with the occasional electric shock), I swear. But, once in the arena, Death Metal means business-you're gonna need those armor bonuses...and prayers to the Bot gods!

Stats: SPD-5 // TRA- 2 // TOR-1 // WPN-15 // ARM-7

SHW: Triple 6




Powerful 4WD pneumatic flipper that can easily self-right. Horns are purely for aesthetics and come off fairly easily. There are also spikes on the sides and the rear wheels extend out of the back to prevent stranding.

Stats: SPD-6 // TRA-5 // TOR-2 // WPN-7 // ARM-10

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