Fragment

From NHRL

Fragment is an overhead spinner. This robot was built by Sam Pierce, a high school junior from Fairfax, Virginia. This is the first bot ever to turn off Brett the Brick.

Robot Facts

Fragment
Driver Sam Pierce
Weight Class 3lb
Body Material Glass Fiber Nylon, Carbon Fiber Nylon, Carbon Fiber, Grade 5 Titanium (6Al-4V)
Weapon AR500 Overhead Spinner
Weapon Drive Brushless Outrunner
Drive Brushed Gear Motor
Power 850 MaH 3S Lipo

Tournament Results

2021

NHRL February Did Not Compete
NHRL March 2 Wins - 2 Losses

Combat History

Fragment Version 1
  • Version 1:
    • Overhead Horizontal Spinner - 4200 rpm, ~120mph tip speed
    • 3s 850mAh
    • 40amp esc
    • Brushed drive (22mm Botkits gear motor)
    • NylonX and Nylon 645 Chassis with 2mm Carbon Fiber top and bottom plates.
    • 250mm diameter AR500 Weapon
      Fragment Version 2
  • Version 2:
    • Overhead Horizontal Spinner - 9300 rpm, ~250mph tip speed
    • 4s 850mAh
    • 51amp esc
    • Brushless Drive (Modified 22mm Botkits gear motor)
    • Unibody Bridge Nylon chassis with 1.5mm aluminum top and bottom plates.
    • 220mm diameter AR500 Weapon
      Fragment V1.1
  • Version 1.1 (Back to old-reliable)
    • Overhead Horizontal 250mm diameter - 8000 rpm, ~250mph tip speed
    • Battery: Turnigy Graphene Panther 850mAh 4S
    • Weapon Assembly: 1/2" low-profile steel shoulder bolt with a thrust bearing, roller bearing, thrust bearing stack
    • Weapon Motor: Aerodrive SK3 3536 1400kv
    • Weapon ESC: DYS Aria 70A with extra heat sinks
    • Drive Assembly: 22mm brushless direct drive, belted back wheel. Titanium spike wheels as seen on Lynx
    • Drive Motor: Aerodrive SK3 2118 3100kv
    • Drive ESC Multistar 21amp
    • Chassis: Unibody Taulman bridge nylon armor, 2mm CF top and bottom plates








Statistics

Info

  • Rank: #78 in 3lb.
  • Last 5 fights: WLLWL
  • Current streak: L1 (1 KOs/KO'd)
  • Longest winning streak: 2 (1 KOs)
  • Longest losing streak: 2 (1 KO'd)
  • Avg fight time (seconds): 116.5

Record

Year Events Fights W L % KOs KO'd
2018-19
2020
2021 2 7 4 3 0.571 2 3
2022 1 3 1 2 0.333 1 1
All-Time 3 10 5 5 0.500 3 4


Events

Date Fought as Reached Place Fights W L KOs KO'd
March 20, 2021 Fragment Winners 4 3 2 1 1 1
July 24, 2021 Fragment Losers 4 4 2 2 1 2
July 16, 2022 Fragment Elimination Round 4 3 1 2 1 1


Opponents

Opponent Fights W L KOs KO'd Last Meeting
Booooring 1 1 0 1 0 March 20, 2021
The Student 1 1 0 1 0 July 24, 2021
Revolver 1 1 0 1 0 July 16, 2022
Vespula 1 1 0 0 0 March 20, 2021
The Shrew 1 1 0 0 0 July 24, 2021
Silk 1 0 1 0 1 March 20, 2021
Nibblema 1 0 1 0 1 July 24, 2021
Adrift 1 0 1 0 1 July 24, 2021
Kamino 1 0 1 0 1 July 16, 2022
Sombra (3lb) 1 0 1 0 0 July 16, 2022

Click "Expand" to see this table.


Full Fight History

Date Opponent Round Result By Points Fight Length (s) Video
March 20, 2021 Pitstop Winners 1 Win Forfeit 0.00
March 20, 2021 Vespula Winners 2 Win Judges Decision 1.00 180 https://youtu.be/qh1H8ajmCpE
March 20, 2021 Booooring Winners 3 Win KO 1.01 90 https://youtu.be/533rD3hugXo
March 20, 2021 Silk Winners 4 Loss KO -1.00 32 https://youtu.be/1WC4IW-Woz8?t=22315
March 20, 2021 Judge's Dream Losers 5 Loss Forfeit 0.00 https://youtu.be/RUbP3ogRGDM
July 24, 2021 The Shrew Winners 1 Win Judges Decision 1.00 180 https://youtu.be/YdFhoHFowgM
July 24, 2021 Nibblema Winners 2 Loss KO -1.06 114 https://youtu.be/DtlIWhSw7yQ?t=15603
July 24, 2021 Harlequin Losers 2 Win Forfeit 0.00
July 24, 2021 The Student Losers 3 Win KO 1.00 34 https://youtu.be/DtlIWhSw7yQ?t=25166
July 24, 2021 Adrift Losers 4 Loss KO -1.16 96 https://youtu.be/xEQmIu-H_YE
July 16, 2022 MilkTankette Undefeated Round 2 Win Forfeit 0.00
July 16, 2022 Sombra (3lb) Undefeated Round 3 Loss Judges Decision -1.00 180 https://youtu.be/Y7ICJDeDdfY?t=22948
July 16, 2022 Revolver Elimination Round 3 Win KO 1.10 145 https://youtu.be/p76hqdy44QU?t=22534
July 16, 2022 Kamino Elimination Round 4 Loss KO -1.00 114 https://youtu.be/Y7ICJDeDdfY?t=36292

* Forfeits are not counted in a bot's W-L record.

For more information on how points are calculated for rankings, click here.

Click "Expand" to see this table.

Select Fights