Q & A
Eighteen Years Ago...
March 4th, 2019 marks the eighteenth anniversary of Team Run Amok's victory at Robotica. The final fight took place at about 2:30 AM and it had been a very long day. Since that time, we've won a few more championships and we've been on the podium at more than half the events we've entered. We've organized three Antbotica competitions, traveled to compete in England twice, and answered more than 6500 questions about combat robotics at the Ask Aaron page. We're still at it, albeit with a heavy heart.
Combat Guide: FlySky FS-i6 Transmitter
The rise of inexpensive Chinese R/C gear has had a large impact in combat robotics. The lists of features on these radios are impressive and the prices are amazing, but the documentation is horrible and the menu systems can be maddeningly frustrating. The FlySky FS-i6 has become the most popular of these Chinese radios.
I'm not a fan of 'going cheap' on combat radio gear, but I also don't like to see builders struggle with an important aspect of their robot's performance. If you're going to use one of these radios you're going to need some help to set it up properly. This guide will save you time and trouble.
'Ask Aaron' Website Answers 6500th Question!
When my son Aaron and I started the 'Ask Aaron' website, we didn't even know there WERE 6500 questions about combat robots. Aaron started the site in 2003 to discuss robots and learn more about robotics by researching answers he didn't already know. I took over the answering duties in late 2013.
US RoboGames 2019 Cancelled
Rumors started circulating following a message in a personal message to a builder inquiring about the 2019 RoboGames: "No event" was all it said. A couple days later a more official message from the RoboGames director appeared in a Facebook forum:
There will not be a RoboGames 2019 in California. RoboGame Egypt 2018 & 2019 will likely have a small non combat event. But there are no plans for a large combat events anywhere on the planet under my direction using my arena, ect.I'll point out that RoboGames skipped a year (2014) previously, and there is nothing in either message specific to years beyond 2019. No need to get your knickers in a knot. Stay tuned.
Spring Powered Flipper Weapons
Pneumatic flipper weapons are awesome but their complexity can be troublesome, particularly in smaller combat robots. Flippers powered by mechanical energy stored in springs or elastic bands could offer attractive alternatives to pneumatics if designs that use electric gearmotors to trigger and reset spring flippers were better known to builders. I've put together animations and discussion of four poorly known spring flipper designs and wrapped them up in a new webpage. Take a look; it might light a fire in your imagination.
Robert Cowan YouTube Channel
There once were a great many combat robot build logs out on the 'net. A new builder could learn from the experiences of other builders and find answers to questions they didn't even know they had. Now there are very few builders that even maintein websites,and fewer still who are willing to share their build secrets.
Fortunately, builder Rober Cowan has taken on the task of providing well produced videos of the intimate details of building a combat robot, as well as other tech projects he undertakes. His YouTube channel page is here. You might want to start with his video series on his antweight robot 'Sgt. Cuddles'.
Are Boring Designs Killing Robot Combat?
I regularly see complaints in social media bemoaning the disappearance of the wide range of designs that once appeared in combat robot tournaments. The posts will point out that when there were more than three or four designs that had a real chance of winning a tournament there was great media interest in our sport and there were multiple television shows covering our activities.
It isn't unusual for the number of workable designs to fall as more becomes known about what is and is not successful a sport, but a wide variety of design isn't required for popularity.
Example: in the 1960's there were a huge number of different designs at the Indianapolis 500. Many teams built their own chassis -- some with engines in the front, some in the back. Front-wheel, rear-wheel, and all-wheel drives showed up to qualify. Engines of all types were tried: supercharged, tubocharged, normally aspirated, converted street engines, and even pure gas turbines. Four manufacturers offered race tires, and wheel sizes varied from 12" to 18". It was difficult to find two cars alike.
Today all Indy car chassis are identical, only two engines are available, and the tires come from a single manufacturer -- but the crowds at the speedway are as big as ever and the TV audience is huge because the event puts on a good show. You shouldn't blame the drop in combat robot populartity on a lack of design diversity -- correlation does not imply causation. The problem lies elsewhere.
Combat Robot Hall of Fame
Literally thousands of combat robots have fought since the first Robot Wars in 1994. Which do you think were the absolute best? Team Run Amok founded the Combat Robot Hall of Fame in 2003. We polled members of the robot community to select the initial 25 inductees. Robots from both sides of the Atlantic gained membership based on:
Combat Robots in 1988?
Six years before the first Robot Wars, a group of toymakers got together to melt each others' creations in a battlefield filled with road flares and flaming lighter fluid. It looks a lot like robot combat to me!
The contests continued irregularly for many years. Here's video from the 2009 event:
T.i. Combat Robotics Website Goes Dark
The resource-packed website provided by Total insanity Combat Robotics shut down in October of 2015. Most of the content is still accessable from the Internet Archive: Archived T.i. Combat Robotics. However, the Archive does not have a copy of the popular T.i. Four Bar Lifter Simulator.
With the permission of the simulator's author Adam Wrigley, Team Run Amok has created a 'mirror' of the Four Bar page where you can download the simulator software. We are also working with Adam to update the software to run on current Windows computers, but for the moment you will need to install the simulator and the required .NET Framework 1.1 on a pre-Windows 7 machine.
Robotica Sounds Page Update
Someone on Reddit noted that our 'Robotica Sound Clips' page was showing it's age and had unpredictable behavior in sound playback. Given that I hadn't looked at the page in fifteen years was a miriacle that it worked at all! I took a few minutes to update the code to something that modern browsers can appreciate. Same classic Robotica sounds, shiny new sound console players. Go retro and give a listen!
More than a decade ago I wrote the Run Amok Spinner Spreadsheet that models the performance of a combat robot spinning weapon based on the weapon's size, shape, material density, motor, and drivetrain. The spreadsheet has proven itself to be a useful tool in the design of combat spinner weapons, but it does require Microsoft Excel to operate.
The new Run Amok Spinner Calulator runs in your web browser. It's 'mobile friendly' and provides the same performance calculations available in the spinner spreadsheet. The full spreadsheet offers nicer graphic output and a battery capacity estimate, but the new calculator is convenient if you want to quickly model a spinner design on your phone or tablet.
Full release version 1.02 is on-line now. Give it a try and let me know what you think:
BattleBots Allows Complete Spare 'Bots in their 'Tournament'?
Confirmed: several teams at ABC BattleBots 2016 had duplicate robots - complete and ready to fight, waiting in the pits if needed. See the actual pit photo of the twin 'Broncos' at right. At least one team swapped in a spare 'bot for a fight because it was 'convenient'. Traditionally you have one robot and a limited amount of time to repair the machine between rounds. Bringing in a whole new robot has never been allowed.
I suppose it helps if you don't think of 'BattleBots' as an actual robot tournament; think of it instead as a major network TV reality show with huge production costs. The producers don't want to wait around with the clock running while a team struggles to repair a badly damaged robot. Pretty much anything goes to keep the filming on schedule.
I'm told that the decision on which teams got a 'second chance' slot after a defeat was largely based on who was ready to fight. That makes having a complete spare 'bot an appealing - if expensive - option. This practice throws a strong advantage to better financed teams.
BattleBots has long made 'sporting compromises' to favor television. Starting in Season 3 of the original Comedy Central series, popular robots were allowed to sit out the first several rounds of the tournament which gave them battle-weary opponents and a better chance at making the finals. Shenanigans like this have kept Team Run Amok well away from competing at BattleBots.
Tentacle Combat Robotics Torque/AH Calculator (reloaded)
Several years back, Steve Judd of Tentacle Combat Robotics wrote an on-line application to model combat robot drivetrains. The app allows builders to explore the performance of specific robot designs with a wide variety of commonly used electric motors. The tool has proven itself to be an invaluable design aid in matching motors, gearing, wheels, batteries, and speed controllers to provide optimum performance in robots of any weight class.
Steve Judd was a highly respected builder and a selfless supporter of combat robotics. His death in 2010 was a great loss to the community. Following Steve's death, Team Run Amok adopted the task of maintaining and updating the calculator. We have revised the layout and format of the main screen, added support for new motors, and expanded the help file system. Support for the calculator is available thru our Ask Aaron website.
Richard Stuplich from Team Killerbotics also maintains an updated version of the torque/amp calculator: Killerbotics Torque/Amp-Hour Calculator. The original version of the calculator remains available on the Tentacle Combat Robotics site.
UPDATE: In response to multiple requests for assistance in using the Tentacle calculator I've added a walk-thru of an example drivetrain analysis. The walk-thru can be accessed from a link in the calculator help page, or directly from this link:
Updated Robot Combat Tournament Trees
Interest in the RoboGames tournaments has led me to piece together their tournament trees. Complete trees for 2004 thru 2017 are up. The weight-class winners and links to full match results for RoboGames and other major tournaments can be found at:
The archive contains trees and rules for: U.S. Robot Wars ('94 thru '97), U.K. Robot Wars (all seven wars plus the world championships), Robot Wars Extreme Warriors (2001 and 2002), Robotica (all three seasons), BattleBots ('99 Long Beach thru season 5.0.), the RFL Championship Tournaments (2004 thru 2006), and now the complete set of RoboGames tournaments.
There are also links to archive photos of the 1995 and 1996 Robot Wars robots. Click on any '95 or '96 weightclass 'result' and follow the photo link.
New Roaming Robots Website -- The largest robot fighting group in Europe has an exciting new website. In addition to a cool new look, the site feaatures fight videos, robot database, games, puzzles, event schedules, special features and more. Don't miss the 'Battle Zone'.
What Weapons Win? 2016 Update!
Do spinning weapons win more robot combat matches than wedges? Are active weapons better than passive rammers?
In 2006 I ran a statistical analysis of combat robot tournaments for the prior year to compare the performance of robots with kinetic energy spinning weapons to other 'active' weapons and to robots with passive weapons. The results surprised many builders!
There have been significant changes to spinner weapons in the last ten years -- brushless weapon motors, exotic single-tooth impactors, much higher energy storage -- so I decided to re-do my analysis with current data. Once again, the results are surprising:
Talon SRX Speed Controller – Combat Robot Quick Guide
The Talon SRX from CTR Electronics is a robust and capable brushed motor speed controller that should be finding broad use in larger combat robots. The controller was developed for use by competitors in the FIRST Robotics Competition with interface and control options that far exceed the needs of combat robotics. All those options inflate the size of the 'user guide' to 40 pages plus a 'software guide' that runs another 140 pages. The size of those manuals make it difficult find the information needed for combat applications.
I consulted with builders who have used the Talon SRX in combat applications and edited the manual down to a 'Quick Guide' just 3 pages long. The quick guide contains only the information needed to install and set up the Talon SRX in your combat robot.
Combat Robotics on the Rise in Russia!
While nobody was watching there has been a surge of interest in robot combat in Russia. There were two tournaments in 2015: 'ArmorBot' in Moscow (100kg and 50 kg classes), and 'Rise of the Machines' in Perm (60kg class). Lots of new builders making new builder mistakes, but the matches are fun.
Here's a page of competitor photos: Imgur: Rise of the Machines 2015 bots gallary 1 -- gallary 2. Most of the 'bots look like they came from the same shop -- look carefully at the construction details. I think all the armor is painted foamcore that rips away to make a better show. The event sponsors put on robot events for hire, and I suspect they build all the 'bots as well.
Golden Age Robot Combat Videos
Robot combat historian Nate Franklin has been very busy collecting videos from the 'Golden Age' of the sport. Check his YouTube Playlists for hundreds of videos.
Twenty Years of Robot Combat: 1994 to 2014
The first Robot Wars competition took place at the Herbst Pavillion at Fort Mason Center in San Francisco on August 20th and 21st, 1994. Here's a first person account of that first event by one of the competitors: Team Minus Zero.
The first seven years of robot combat were frantic and exciting, with huge media exposure and hundreds of active competitors in Europe and North America. Then came a long downhill slide in popularity and participation. Yet there still remain a few devoted teams working late into the night to build machines designed to pulverize the creations of other fanatical builders. Now a new surge of enthusiasm for combat robotics spreads across South America and the Indian subcontinent, and fresh leadership has appeared in the United States. Fight on, roboteers!
Robot Combat on Television is Alive and Well -- in Korea?
It seems that Korean television has been hiding a robot combat competition called 'Robot Power' for the last decade or so. Best I can tell the show started in 2005 and ended in 2011 There are quite a few episodes available for viewing on YouTube: here's the first episode (I think).
The show is rich in computer graphics depicting fanciful robots on other-worldly arenas, but the competition itself is mostly wedge robots wandering around an arena and sometimes bumping into each other. There are races, arena combat, and even some small humanoid walkers in later episodes.
A Tribute Video from a Fan - Run Amok at Robotica!
Wow, I've never had a tribute video before. It took thirteen years, but I'm terribly grateful. Music by Ahmet and Dweezil Zappa.
'Ask Aaron' 10th Anniversary Celebration - - Write a Haiku, Win a Robot!
Back in March of 2003, Team Run Amok started 'Ask Aaron' to answer the occasional robot combat question sent to our team. Ten years and nearly 5000 questions later we're still here and still fielding a very broad range of practical, theoretical, arcane, obscure, and sometimes just plain silly questions.
To celebrate ten years of Q&A, we held a Combat Robot Haiku contest with an AWESOME robot prize package that included an autonomous waking robot!
I get a lot of requests from robot builders for help calculating the spin-up time and effectiveness of their spinning weapon design. I've written an Excel spreadsheet to calculate the Moment of Inertia, spin-up time, and total energy for spinning discs, bars, drums, and combinations of these shapes. The newest version (19d) allows accurate modeling of brushless motors and adjustments to 'SimonK' controller firmware. Let me know if you find it useful.
If you're interested in the physics of spinning weapons, I recommend reading Paul Hills' Spinner Guide.
UPDATE: We've been getting a lot of questions about electric powered overhead hammer/axe weapons. To analyze their performance I have been using a customized version of the Spinning Weapon Spreadsheet re-focused to look at the first revolution a spinner weapon makes when spinning up to speed. I took some time to make this custom version 'friendlier' and more accurate, and I added a graphic output. I don't generally recommend electric hammer weapons because their energy output is very small compared to a full spinner weapon of the same mass and power source, but if you want to explore their design this spreadsheet can help.
The First Self-Righting Robot? -- Early on in the history of combat robots, builders discovered that an overturned robot was toast. The number of robots designed to overturn their opponent began to increase and countermeasures were needed. Invertible robots, able to continue operating when flipped over, are immune to an overturning attack -- but designing for invertability will either limit or complicate weapon and armor choices. A better solution might result from an active mechanical means of returning an incapacitated overturned 'bot to correct 'wheels down' orientation.
So, who was the first immobilized robot to save itself by self-righting? Several claims have been made for assorted robots under differing conditions, often relying on arena walls or intervention by another robot. Here are the best candidates, in my opinion, for first true self-righting:
The Robot That Never Was -- Here's the untold story of a mock-up robot that just may have been the key to Team Run Amok's acceptance into the Robotica competition. The robot never had a name and it never was fully operational, but without it our whole robot combat career may never have made it off the ground.
Robotica Ring Tone? -- I've had several Robotica sound clips available for a while in .WAV format, but I just recently converted them to .MP3 to make them a better match for portable applications. The "Robots Ready" clip makes a great ring tone.
The Rise and Fall -- Bill Gurstelle, author of magazine articles and multiple books on fringe technology has an entertaining post on his "Notes From The Technology Underground" blog called The Rise, Fall, and Rise of Robotic Combat. It's an interesting perspective, if not entirely accurate.
Antbotica! -- Growing just a little tired of the usual robot combat scenario? Looking for something a little more challenging? Why just trash a field of robot competitors when you can out-think, out-maneuver, and just plain out run them?
Check the rules and results and start building for the next event.
Gyros! -- Remote control combat robots have stability problems. Two-wheeled 'bots don't want to go straight, and four-wheeled 'bots don't want to turn! We can borrow a little technology from R/C helicopter pilots to make the job of driving them a little easier.
You Be The Judge -- Working as a judge at a combat robot tournament is no picnic! Get the match right and everybody nods, but if the crowd doesn't like your call they let you know. Try scoring the five example matches given here and you can see just how tough it can be.
What counts more, a flip or a bash? How many points for smoke? Rip off a wheel - does that win the match for you? Is it better to do damage early or late in the battle? What counts as 'aggression'?
Battbotica Wars -- Think that robot combat is all guts and glory? You may want to think again after you read this list of things that actually happened to Team Run Amok and our friends on journeys to robot combat tournaments in the U.S. and England.
Gallery Update -- My collection of pictures and info on the competitors from the inaugural Robotica competition has been a popular part of the website for a while. Lately, I've received requests for pictures and info on the competitors from seasons two and three. I've scrounged info on almost all of the competitors -- take a look, and if you have material for any of the missing competitors, send it my way!
Robotica Journal -- What was it really like to compete at the inaugural Robotica? Right after I got back from Robotica, I wrote down all the behind-the-scenes bits and happenings for my own files. There are a few things in here that have never come to light 'til now. I also put my favorite picture from Robotica in here.
UPDATE: September, 2017 - I've crawled thru archived websites and dug thru my files for photos from 'Robotica' before the gulf of time swollowed them. I added a selection of these photos to the 'Robotica Journal' and freshened the layout. I think it's an improvement.
Posters? -- I'm searching for posters from the early ('94 thru '97) Robot Wars. Got one rolled up in your closet? Have one taped to the workshop wall? There are hundreds of these posters out there -- why can't I find any??