Forrest and Jim Yeh from Team Robomaster fighting with Ragin Scotsman
Team Robomaster, based out of Piedmont, California began their career in 2000 with the Lightweight Battlebot, Robomaster. Jim and Forrest Yeh have since continued as a father-son team to build several weight classes for each year of Robogames, Combots Cup, King of Bots, and Battlebots.
Team Robomaster Logo
Robots:[]
Ragin Scotsman (220lb)[]
Team Robom
Ragin Scotsman slams Foxic into the wall in a Robogames 2016 rumble
aster’s best-known robot, originally built by Forrest Yeh in the Piedmont Highschool Scotbotics Club in 2010, but rebuilt to a 4-wheel design in 2011 for the Killer Robots Science Channel special with Grant Imahara. The flamethrower mechanism used in Ragin Scotsman is currently the largest in the sport and the same design used in Free Shipping (Battlebots) with a maximum length of 25ft. Because Team Robomaster adopted Ragin Scotsman once Forrest graduated highschool, the whole team has traditionally worn kilts at each year of Robogames.
Ragin Scotsman demonstrating its flamethrower
Ragin Scotsman defeats Polar Vortex at Robogames 2018
Prometheus (220lb)[]
Prometheus fights Ragin Scotsman at Robogames 2017
Using the original chromoly frame from the 2010 Ragin Scotsman , Forrest Yeh modified it when he went to his undergraduate at The University of California, Merced. Team Robomaster helped the UCM Robotics Society run Prometheus until Forrest graduated.
Who’s Your Daddy (120lb)[]
Who's Your Daddy
The red, 4-wheeled drum spinner featured hinged side-skirts made of titanium, but was eventually replaced when Jim Yeh built Who’s Your Daddy Now.
Who's Your Daddy fought at Steel Conflict and won 2nd place at Combots cup
Who’s Your Daddy Now (120b)[]
Robogames 2017
Based on a similar drive train as Ragin Scotsman , with 4 wheels.
Come to Mama (60lb)[]
Come to Mama
Originally built for Jim’s wife, Buffy Yeh. With an aluminum chassis, four concealed wheels, and a drum.
Buffy (Top, Left), Jim (Top, Right), Sierra (Bottom, Left), and Forrest (Bottom, Right)
Robomaster (60lb)[]
The team's first robot for Battlebots in 2000, a lifter with titanium armor that has since been retired.
The Bully (30lb)[]
Forrest Yeh with The Bully
Four protected wheels and a titanium wedge. Forrest’s first robot when he was 10 years old that later became the top ranked Featherweight on BotRank. The Bully was the first robot from Team Robomaster to use a flamethrower, but the weapon was removed in 2011.
Swamp Serpent[]
(Left to Right) Rick Russ, Jim Yeh, Dave Caulkins, Forrest Yeh
Built with Dave Calkins and Rick Russ in 2017 for the Chinese Competition, King of Bots. A 4-wheeled design based off of Vlad the Impaler with a red drum spinner and flamethrower. Competed in RoboGames 2024 to little success.
Outside RoboGames[]
Free Shipping (BattleBots, 250lb)[]
Team Special Delivery, Battlebots 4.0 (2019)
Team Robomaster joined forces with Gary Gin as Team Special Delivery to build Free Shipping in Battlebots 2018 & 2019 as well as the Re:MARS Amazon Conference in Las Vegas. The flamethrower mechanism was based off of the same design as Ragin Scotsman.
RoboGames Record[]
| Competition | Team Robomaster Robogames Record |
|---|---|
| 2004 | 120lb Combat with Who's Your Daddy? 30lb Combat with The Bully |
| 2005 | 120lb Combat with Who's Your Daddy? 30lb Combat with The Bully |
| 2006 | Did not enter |
| 2007 | Did not enter |
| 2008 | 30lb Combat with The Bully |
| 2009 | 30lb Combat Silver Medalist with The Bully |
| 2010 | 30lb Combat with The Bully |
| 2011 | 220lb Combat with Ragin Scotsman 30lb Combat with The Bully |
| 2012 | 220lb Combat 4th Place with Ragin Scotsman 30lb Combat with The Bully |
| 2013 | 220lb Combat with Ragin Scotsman and Prometheus |
| 2015 | 220lb Combat with Ragin Scotsman and Prometheus |
| 2016 | 220lb Silver Medalist with Prometheus 220lb Combat with Ragin Scotsman 120lb Combat with Who's Your Daddy Now? |
| 2017 | 220lb Combat with Ragin Scotsman and Prometheus 120lb Combat with Who's Your Daddy Now? |
| 2018 | 220lb Combat with Ragin Scotsman |
| 2023 | 250lb Combat with Ragin Scotsman 120lb Combat with Who's Your Daddy Now? |
| 2024 | 250lb Combat Silver Medalist with Ragin Scotsman 250lb Combat with Swamp Serpent 120lb Combat Silver Medalist with Who's Your Daddy Now? |
| Competition | Team Robomaster RFL Championship Record |
| 2004 ComBots Open | Did not enter |
| 2004 | Middleweight Division with Who's Your Daddy? Featherweight Division with The Bully |
| 2005 | Did not enter |
| Competition | Team Robomaster Combots Record |
| Combots Cup I | Middleweight Runner-Up with Who's Your Daddy? |
| Combots Cup II | Did not enter |
| Combots Cup III | Featherweight Runner-Up with The Bully |
| Combots Texas Cup | Did not enter |
| Combots Cup IV | Featherweight Champion with The Bully |
| Combots Cup V | Heavyweight Division with Ragin Scotsman Featherweight Third Place with The Bully |
| Combots Cup VI | Heavyweight Division with Ragin Scotsman Featherweight Runner-Up with The Bully |
| Combots Cup VII | Heavyweight 4th Place with Ragin Scotsman Featherweight Third Place with The Bully |