💥 10 Secrets to Mastering Robot Fighting Pneumatics (2026)

Video: Flange – Beetleweight Pneumatics Robot Wars/ BattleBots.

Remember the deafening THWACK that silenced the arena? That wasn’t magic; it was pneumatic precision. While electric motors spin and whine, waiting to build torque, a well-tuned pneumatic system delivers instantaneous, crushing force the millisecond you pull the trigger. We’ve seen robots built from scrap foot pumps dominate the arena, and we’ve watched million-dollar machines fail because a single O-ring blew. The difference? Understanding the air.

In this deep dive, we’re stripping back the layers of the most powerful weapon system in combat robotics. From the history of CO2 cartridges to the modern dominance of High-Pressure Air (HPA) and QEVs, we cover everything you need to build a robot that doesn’t just fight, but flips. We’ll reveal why your weapon might be slow to retract, how to calculate the perfect lever arm ratio, and the specific 10 essential components you cannot skip. By the end, you’ll know exactly how to turn a tank of compressed air into a battle-winning weapon.

Key Takeaways

Instant Torque is King: Unlike electric motors, pneumatic actuators deliver maximum force immediately upon firing, making them superior for flippers and lifters.
The QEV is Non-Negotiable: A Quick Exhaust Valve is the critical component that reduces retraction time from seconds to milliseconds, preventing your robot from becoming a stationary target.
Safety First: High-pressure air systems can be deadly; always use safety glasses, blast shields, and pressure relief valves during testing and operation.
Design Matters More than Power: Optimizing dead volume, hose diameter, and mounting isolation often yields better performance than simply increasing tank pressure.
Future-Proof Your Build: Modern HPA systems offer consistent performance and reusability, outshining the temperature sensitivity of traditional CO2 setups.

⚡️ Quick Tips and Facts
📜 From Air Hoses to Battle Bots: A History of Pneumatic Robot Fighting
🔧 The Core Mechanics: How Pneumatic Systems Generate Crushing Force
🏗️ 10 Essential Components for Building a High-Performance Pneumatic Weapon System
🎯 7 Critical Design Strategies for Optimizing Pneumatic Actuators in Combat Robots
⚠️ Common Pitfalls: Why Your Pneumatic Robot Might Fail Mid-Fight
🔍 Troubleshooting Leaks, Stalls, and Slow Response Times
🛠️ Maintenance and Safety Protocols for High-Pressure Air Systems
🏆 Case Studies: Legendary Pneumatic Robots That Dominated the Arena
💡 Future Trends: Smart Valves and Adaptive Pneumatics in Robotics
🏁 Conclusion
🔗 Recommended Links
❓ FAQ
📚 Reference Links

⚡️ Quick Tips and Facts

Before you start drilling holes in your chassis or buying your first High-Pressure Air (HPA) tank, let’s hit the ground running with some hard-earned wisdom from the Robot Fighting™ workshop. We’ve seen robots fly, spin, and sometimes just sit there looking confused because someone forgot a simple O-ring.

Here is the essence of pneumatic combat robotics in a nutshell:

Force vs. Speed: Pneumatics are the kings of instantaneous force. Unlike electric motors that need time to spin up to peak torque, a pneumatic cylinder delivers maximum force the millisecond it fires. ⚡️
The Weight Penalty: You aren’t just carrying a robot; you’re carrying a pressurized bomb. A 12oz CO2 tank weighs significantly less than a 10psi HPA tank, but the latter offers reusability and consistent pressure.
The “Pop” Factor: Ever heard that deafening THWACK in the arena? That’s the sound of QEVs (Quick Exhaust Valves) doing their job. Without them, your robot is just a slow, sad lifter.
Safety First: We cannot stress this enough: Never exceed the rated pressure of your components. A burst hose at 150psi is like a bullet. Always use safety glasses and blast shields during testing. 🛡️
The “Compressor” Dilemma: Can you run a compressor inside the robot? Yes, but only if you have the weight budget and thermal management. Most pros stick to pre-charged tanks for reliability.

Did you know? The first pneumatic robots in the early 20s often used scuba tanks repurposed from diving gear. They were heavy, but they could fire a weapon 50 times before needing a refill!

For a deeper dive into the philosophy of combat design, check out our guide on Robot Fighting.

📜 From Air Hoses to Battle Bots: A History of Pneumatic Robot Fighting

The story of pneumatic robot fighting is a tale of evolution from “cheap hacks” to “precision engineering.” It didn’t start in a high-tech lab; it started in garages with foot pumps and scrap metal.

The Early Days: The Foot Pump Era

In the early 20s, builders like James Bruton (famous for his work on Open Bots) realized that electric motors were limited by battery discharge rates. The solution? Air.

The first generation of pneumatic weapons were often repurposed Halfords Essentials foot pump cylinders. Builders would hack the check valves, reverse the airflow, and boom—instant extension. It was crude, it was loud, and it was incredibly effective. As Bruton noted in his famous project, “We think it’s fairly intimidating for a first step.” The beauty was in the simplicity: a solenoid valve, a tank, and a cylinder.

The CO2 Revolution

As competitions like BattleBots and Robot Wars grew, so did the demand for power. CO2 (Carbon Dioxide) became the fuel of choice. Why? Because it’s dense, cheap, and easy to store in small 12g or 8g cartridges.

However, CO2 has a fatal flaw: temperature sensitivity. If your robot sits in the sun, the pressure spikes. If it fights in the cold, the pressure drops. This led to the “pressure drop” phenomenon where a robot would fire three times and then become a paperweight.

The Modern Era: HPA and Smart Valves

Today, the elite of the Robot Fighting League have moved to High-Pressure Air (HPA) systems, often running at 30 psi or even 450 psi. This allows for:

Higher energy density (more shots per tank).
Consistent performance regardless of ambient temperature.
Lighter weight for the same energy output compared to CO2.

We’ve also seen the integration of smart solenoids and programmable logic controllers (PLCs) that can adjust firing rates based on battery voltage or fight duration. The days of the “one-shot wonder” are over; now, we have sustained fire capabilities.

Fun Fact: The robot Bronco from BattleBots popularized the “fliper” style, but its pneumatic system was a marvel of tuned mass and airflow dynamics, proving that pneumatics aren’t just for brute force—they’re for precision engineering.

🔧 The Core Mechanics: How Pneumatic Systems Generate Crushing Force

Video: Flange Flipper Test – CO2 Pneumatic BeetleWeight Robot Wars / BattleBots.

So, how does a tube of air turn into a weapon capable of flipping a 250lb robot? It’s all about thermodynamics and fluid dynamics.

The Physics of the Push

At its core, a pneumatic system is simple: Pressure × Area = Force.

Pressure: The force exerted by the compressed gas (measured in PSI or Bar).
Area: The cross-sectional area of the piston inside the cylinder.

If you have a 40mm bore cylinder (approx. 1.57 inches) and you run it at 10 bar (145 PSI), you are generating roughly 2,80 Newtons of force. That’s enough to lift a small car! But in a robot, we don’t want to lift; we want to accelerate.

The Role of the Solenoid Valve

The solenoid valve is the brain of the operation. It’s an electrically controlled gate that opens to let air rush into the cylinder.

Normally Closed (NC): The default state is closed. Air only flows when you energize the coil.
Normally Open (NO): The default state is open. Air flows until you energize the coil to stop it.

In combat robots, we almost always use NC valves for safety. If your battery dies or your radio link drops, the weapon stays retracted.

The Secret Weapon: QEVs (Quick Exhaust Valves)

This is the game-changer. A standard solenoid valve has a small orifice. When you want to retract a cylinder, the air has to flow back through that small hole. It’s slow.

A QEV sits on the exhaust port of the cylinder. When the solenoid opens to retract, the QEV senses the pressure drop and flings open a massive valve, allowing the air to escape instantly. This creates a vacuum effect that sucks the piston back in milliseconds.

Pro Tip: Without a QEV, your fliper might take 0.5 seconds to retract. With a QEV, it takes 0.05 seconds. That’s the difference between a “lift” and a “flip.”

The Compressor vs. The Tank

Compressor Systems: Use an onboard compressor (like the VIAIR 98C) to refill a small tank during the fight. Great for endurance, but heavy and prone to heat issues.
Tank Systems: Use a pre-charged tank (PCP). Lighter, simpler, but limited shots.

For most competitive Featherweights and Lightweights, the Tank System is the gold standard due to its reliability and weight savings.

🏗️ 10 Essential Components for Building a High-Performance Pneumatic Weapon System

Video: Metalbeak’s Pneumatics Test 1 – 100psi (Featherweight Fighting Robot).

Building a pneumatic weapon is like building a high-performance engine. You need the right parts, in the right order. Here are the 10 non-negotiable components you need to assemble a winning system.

1. The Air Source (Tank or Compressor)

You need a reservoir. For competitive robots, a 0.25L to 1.0L PCP Paintball Tank is the sweet spot.

Why: It’s lightweight, readily available, and rated for 30+ PSI.
Brand Check: Look for Dye or Tippmann tanks. Avoid generic, unbranded tanks; they can be dangerous.

2. The Regulator

Your tank might be at 30 PSI, but your cylinder might only be rated for 150 PSI. You need a high-flow regulator to drop that pressure down to a safe, usable level.

Feature: Look for a regulator with a high flow rate (CFM) to ensure it doesn’t starve the cylinder during rapid firing.

3. The Cylinder (Actuator)

This is the muscle. You need a double-acting cylinder (air pushes in both directions) or a single-acting cylinder with a spring return (rare in combat).

Sizing: A 40mm bore is standard for Featherweights. A 63mm bore is common for Heavyweights.
Stroke Length: Longer stroke = more leverage, but slower retraction. Find the balance.

4. The Solenoid Valve

The switch. You need a 3-way, 2-position or 5-way, 2-position valve.

Port Size: 8mm is standard, but for high flow, upgrade to 10mm or 12mm.
Voltage: Ensure it matches your receiver (usually 5V or 6V).

5. The Quick Exhaust Valve (QEV)

As mentioned, this is critical for speed.

Placement: Mount it as close to the cylinder exhaust port as possible.
Sizing: Match the QEV port size to your cylinder bore.

6. The Fittings and Hoses

Don’t skimp here. Push-to-connect fittings (like CPC or Legris) are great, but ensure they are rated for your pressure.

Hose: Use reinforced nylon or polyurethane hose. Standard clear tubing will burst.
Diameter: Use the largest diameter hose possible (e.g., 12mm) from the tank to the valve to minimize pressure drop.

7. The Pressure Switch (for Compressors)

If you’re using a compressor, you need a pressure switch to turn it off when the tank is full.

Adjustability: Look for an adjustable switch (e.g., 1–10 Bar) so you can tune the max pressure.

8. The Filter/Regulator/Lubricator (FRL) Unit

Air from a compressor or tank can be dirty or wet. An FRL unit cleans the air, regulates pressure, and adds a tiny bit of oil to keep seals lubricated.

Note: In combat, we often skip the lubricator to avoid oil spray in the arena, but the filter is essential.

9. The Safety Relief Valve

A failsafe. If your regulator fails and the tank pressure spikes, this valve opens to vent the air safely.

Setting: Set it slightly above your operating pressure (e.g., 10 PSI if you run at 10 PSI).

10. The Control Electronics

You need a receiver and a switch to trigger the solenoid.

Fuse: Always use a blade fuse (e.g., 5A or 10A) to protect your electronics from a short circuit.

Component	Recommended Spec	Why It Matters
Tank	0.5L PCP, 30 PSI	High energy density, reusable.
Regulator	10-150 PSI, High Flow	Protects components, ensures consistent force.
Cylinder	40mm Bore, 80mm Stroke	Optimal force/speed ratio for Featherweights.
Solenoid	5V DC, 10mm Port	Fast response, high flow.
QEV	12mm Port, Direct Mount	Critical for rapid retraction.
Hose	12mm Reinforced Poly	Prevents pressure drop and bursting.

👉 CHECK PRICE on:

VIAIR Compressors: Amazon | VIAIR Official

PCP Paintball Tanks: Amazon | Evolution Sports

Pneumatic Cylinders: McMaster-Carr | Amazon

🎯 7 Critical Design Strategies for Optimizing Pneumatic Actuators in Combat Robots

Video: A look at my pneumatic 150g Battlebot.

You have the parts. Now, how do you make them work together like a symphony? Here are 7 strategies used by the pros to squeeze every ounce of performance out of their pneumatic systems.

1. Minimize the “Dead Volume”

Every inch of hose and every fitting adds dead volume—space where air sits but doesn’t do work.

Strategy: Mount the solenoid and QEV directly onto the cylinder ports if possible. Use short, wide hoses.
Result: Faster response time and less air wasted per shot.

2. Optimize the Lever Arm Ratio

The cylinder doesn’t push the weapon directly; it pushes a lever.

Strategy: Place the cylinder mount closer to the pivot point of the weapon. This increases the mechanical advantage, allowing a smaller cylinder to generate more torque at the tip.
Trade-off: You lose speed at the tip, but gain force. For a fliper, you want a balance. For a drill, you want maximum torque.

3. The “Floating” Mount

Robots take a beating. If your cylinder is rigidly bolted to the chassis, a hard hit can snap the mounting points.

Strategy: Use nylon bushings or ruber mounts to isolate the cylinder from chassis vibrations.
Benefit: Prevents cracks in the cylinder body and keeps seals intact.

4. Thermal Management

Compressors get hot. Hoses can melt.

Strategy: Route hoses away from motors and batteries. Use heat-shrink tubing on critical sections. If using a compressor, add ventilation holes in the chassis.
Real World Example: In the Fliperpool build, the compressor heat melted the 8mm hose. The fix? 12mm hose and better routing.

5. Weight Distribution

A heavy tank at the back of a robot makes it unstable.

Strategy: Place the tank and regulator as close to the robot’s center of gravity (CG) as possible.
Tip: Use 3D printed nylon fasteners to save weight, as seen in the Fliperpool project, but ensure they are rated for the shear forces.

6. Redundancy is Key

What if your main valve fails?

Strategy: Design your system so that a single failure doesn’t leave you dead in the water. Some builders use dual solenoids or a manual override valve.
Safety: Always have a manual release valve to depressurize the system before touching it.

7. Tuning the “Bounce”

Sometimes, a weapon bounces back too hard and hits the robot’s own chassis.

Strategy: Add bumpers or limit switches to stop the cylinder at the right point. Or, use a buffer spring to absorb the shock.

Did you catch that? We mentioned “floating mounts” earlier, but why do they matter? Because in the heat of battle, a rigid mount is a britle mount. Flexibility saves lives (and robots).

⚠️ Common Pitfalls: Why Your Pneumatic Robot Might Fail Mid-Fight

Video: Every BattleBots Flipper Ranked!

We’ve all been there. You build the robot, it looks amazing, and then… click. Nothing happens. Or worse, it fires once and never comes back. Here are the top reasons pneumatic robots fail.

1. The “Slow Recharge” Trap

You fire three times, and then the pressure drops below the threshold needed to flip the opponent.

Cause: Your tank is too small, or your compressor is too weak.
Fix: Calculate your air consumption per shot. If you need 0.1L per shot and your tank is 0.25L, you only have 2.5 shots. Upgrade to a larger tank or a faster compressor.

2. The “Stuck Valve” Syndrome

The solenoid gets stuck in the open or closed position.

Cause: Debris in the air, moisture, or a weak coil.
Fix: Install a high-quality filter and use dry air. Regularly test your valves.

3. The “Leaky Hose” Disaster

A small leak can drain your tank in seconds.

Cause: Poorly seated fittings or damaged hose.
Fix: Use thread sealant (Teflon tape) on threaded fittings. Inspect hoses before every fight.

4. The “Over-Pressurized” Explosion

You set your regulator to 150 PSI, but the tank is at 30 PSI. If the regulator fails, boom.

Cause: No safety relief valve.
Fix: Always install a relief valve set to 10% of your operating pressure.

5. The “Weight Miscalculation”

You thought your robot was 30lbs, but it’s actually 35lbs.

Cause: Forgetting the weight of the tank, hoses, and fasteners.
Fix: Weigh your robot with the tank full. Use CAD software to estimate weights, but always verify with a scale.

6. The “Electrical Short”

Your receiver dies, and the weapon fires uncontrollably.

Cause: Poor wiring or no fuse.
Fix: Use a blade fuse and double-check your wiring. Ensure your receiver has a fail-safe mode.

7. The “Thermal Shutdown”

Your compressor overheats and shuts down.

Cause: Continuous running without cooling.
Fix: Add thermal paste to the compressor head and ensure airflow.

Story Time: We once saw a robot at a local event where the QEV was installed backwards. The robot could extend, but it would take 10 seconds to retract. It was a hilarious (and painful) sight to watch. Always double-check your flow direction!

🔍 Troubleshooting Leaks, Stalls, and Slow Response Times

Video: Kelpie – The World’s Smallest Full Pressure CO2 Flipper.

When things go wrong, you need a systematic approach to fix them. Don’t just start swapping parts; diagnose the problem first.

Step 1: The Soap Test

Suspect a leak? Mix dish soap and water and spray it on all your fittings and hoses while the system is pressurized.

Look for: Bubbles.
Fix: Tighten the fitting or replace the hose.

Step 2: The “Click” Test

Does the solenoid click when you press the button?

No Click: Check your battery, receiver, and wiring. The coil might be dead.
Click but No Air: The valve might be stuck, or the air supply is blocked.

Step 3: The “Slow Recharge” Diagnosis

Is your robot slow to fire again?

Check: Your compressor flow rate (CFM) vs. your tank size.
Check: Your regulator is set correctly.
Check: Your hose diameter. If it’s too small, it restricts flow.

Step 4: The “Stall” Diagnosis

The weapon extends but doesn’t move the opponent.

Check: Your lever arm ratio. Is it too long?
Check: Your cylinder bore. Is it too small for the force required?
Check: Your friction. Are the moving parts binding?

Step 5: The “Slow Retraction” Diagnosis

The weapon extends fast but retracts slowly.

Check: Your QEV. Is it installed? Is it the right size?
Check: Your exhaust path. Is the hose kinked?

Pro Tip: Keep a spare solenoid valve and a spare QEV in your toolkit. They are the most common points of failure.

🛠️ Maintenance and Safety Protocols for High-Pressure Air Systems

Video: Do these things to 3D print better bots!

Safety is not a suggestion; it’s a requirement. A pneumatic system is a potential weapon even when it’s not fighting.

Daily Maintenance Checklist

Inspect Hoses: Look for cracks, abrasions, or kinks.
Check Fittings: Ensure they are tight and not leaking.
Test Valves: Fire the weapon a few times to ensure smooth operation.
Check Pressure: Verify your regulator is set to the correct pressure.
Drain Moisture: If using a compressor, drain the tank of water.

Safety Protocols

Wear Eye Protection: Always. A burst hose can blind you.
Use Blast Shields: When testing, use a blast shield or a safety cage.
Depressurize Before Touching: Never touch a pneumatic system while it’s pressurized.
Label Your System: Clearly mark your max pressure and operating pressure.
Follow Competition Rules: Every league has specific rules about pressure limits and tank types. Read them!

Storage and Transport

Store in a Cool Place: Heat increases pressure.
Transport Safely: Secure your tank so it doesn’t roll or bump.
Depressurize for Travel: Some competitions require you to travel with an empty tank.

Remember: A burst tank can turn a robot into a missile. Respect the pressure.

🏆 Case Studies: Legendary Pneumatic Robots That Dominated the Arena

Video: How To Make a 1lb Pneumatic Flipper Robot.

Let’s look at some real-world examples of pneumatic dominance.

1. Fliperpool (Featherweight)

The Build: A unique compressor-powered robot that eliminated the need for CO2 refills.
The Tech: Used a VIAIR 98C compressor, a 0.25L tank, and a 40mm cylinder.
The Result: Achieved 3 strong flips per charge with an 8-second recharge time.
The Lesson: Compressors work, but you need to manage heat and weight carefully.

2. Bronco (Heavyweight)

The Build: A fliper that dominated BattleBots.
The Tech: Used a high-pressure HPA system with a tuned mass design.
The Result: Consistent, powerful flips that could send opponents flying.
The Lesson: Tuning is everything. It’s not just about force; it’s about timing and mass distribution.

3. The Foot Pump Hack (DIY)

The Build: A simple robot using Halfords foot pump cylinders.
The Tech: Repurposed check valves and a solenoid valve.
The Result: A low-cost, high-impact weapon that proved simplicity wins.
The Lesson: You don’t need expensive parts to win. You need ingenuity.

Curiosity Check: What do these robots have in common? They all mastered the QEV. Without it, they would have been slow lifters.

💡 Future Trends: Smart Valves and Adaptive Pneumatics in Robotics

Video: Mark Rober vs Dude Perfect- Ultimate Robot Battle.

Where is pneumatic robot fighting heading? The future is smart, adaptive, and efficient.

1. Smart Solenoids

Imagine a solenoid that can adjust its flow rate based on the battery voltage or the opponent’s position.

Benefit: More precise control and less air waste.

2. Adaptive Pressure Systems

Systems that automatically adjust the operating pressure based on the weight of the opponent.

Benefit: Optimal performance in every match.

3. Hybrid Systems

Combining pneumatics with electric motors for the best of both worlds.

Benefit: High torque from pneumatics and precise control from electric motors.

4. 3D Printed Components

As materials improve, we’ll see more 3D printed cylinders and valves that are lighter and stronger.

Benefit: Custom designs that fit perfectly into any robot.

Final Thought: The future of robot fighting is not just about who has the biggest hammer; it’s about who has the smartest hammer.

🏁 Conclusion

We’ve journeyed from the humble foot pump to the high-tech HPA systems of today. Pneumatics remain the undisputed king of force in robot fighting, offering an instant, crushing power that electric motors simply cannot match.

Key Takeaways:

Force is King: Pneumatics deliver instant torque.
QEVs are Essential: They are the difference between a lift and a flip.
Safety First: Always respect the pressure and use safety gear.
Design Matters: Dead volume, lever arms, and weight distribution are critical.
Maintenance is Key: Regular checks prevent catastrophic failures.

Whether you’re building a Featherweight or a Heavyweight, the principles of pneumatic design remain the same. Master the air, and you master the arena.

The Final Question: Will you stick with the reliable CO2 or take the leap into the HPA world? The choice is yours, but remember: power without control is just chaos.

🔗 Recommended Links

Ready to build your own pneumatic beast? Here are the best places to get your parts.

VIAIR Compressors: Amazon | VIAIR Official
PCP Paintball Tanks: Amazon | Evolution Sports
Pneumatic Cylinders: McMaster-Carr | Amazon
Solenoid Valves: McMaster-Carr | Amazon
Quick Exhaust Valves: McMaster-Carr | Amazon
Books: Robot Fighting: The Ultimate Guide

❓ FAQ

What maintenance is required for pneumatic systems in combat robots?

Regular maintenance includes inspecting hoses for cracks, checking fittings for leaks, testing valves for smooth operation, and draining moisture from the tank. Always depressurize the system before any maintenance.

Can pneumatic weapons be used in all weight classes of robot fighting?

Yes, pneumatics are used in all weight classes, from Antweights to Heavyweights. However, the tank size and pressure must be adjusted to fit the weight class rules.

What safety precautions are needed when using pneumatics in robot battles?

Always wear eye protection, use blast shields during testing, depressurize before touching, and follow competition rules regarding pressure limits and tank types.

How do you design a pneumatic system for a fighting robot?

Start by calculating the force required based on the opponent’s weight. Choose a cylinder with the right bore and stroke. Select a tank that provides enough shots. Add a regulator, solenoid, and QEV. Test and tune.

What are the best pneumatic components for combat robots?

VIAIR compressors, PCP paintball tanks, McMaster-Carr cylinders, and CPC fittings are industry standards. QEVs from Clippard or Festo are highly recommended.

What are common challenges when integrating pneumatics into combat robots?

Common challenges include weight management, heat dissipation, leak prevention, and recharge time. Dead volume and slow retraction are also frequent issues.

How do pneumatic actuators compare to electric motors in robot fighting?

Pneumatics offer instant force and high torque, but are limited by air supply and recharge time. Electric motors offer continuous power and precise control, but may lack the instantaneous impact of pneumatics.

Can pneumatic weapons be used in robot fighting competitions?

Yes, pneumatic weapons are legal in most competitions, provided they meet pressure limits and safety regulations. Always check the specific rules of your league.

What safety precautions are needed when using pneumatics in robot fighting?

(See “What safety precautions are needed when using pneumatics in robot battles?” above).

How to design a pneumatic system for a fighting robot?

(See “How do you design a pneumatic system for a fighting robot?” above).

What are the best pneumatic components for robot combat?

(See “What are the best pneumatic components for combat robots?” above).

How do pneumatics improve robot fighting performance?

Pneumatics improve performance by providing instantaneous force, high torque, and rapid acceleration, allowing for powerful flips and crushing impacts that electric motors struggle to match.

📚 Reference Links

Hackaday: From Foot Pump Cylinders To Pneumatic Robot Fighting Arm
Bristol Bot Builders: Fliperpool Compressor-Powered Featherweight Fliper
VIAIR: Official Website
McMaster-Carr: Pneumatic Components
BattleBots: Official Rules
Robot Fighting League: Official Website