Fuel cells don’t have polluting exhaust, can be refueled just as easily as gasoline, and provide hours of flight time while being lighter than a gasoline system. Hydrogen has three times the energy density of gasoline and can be converted to electricity using a fuel cell without the complexity of an internal combustion engine. Hydrogen fuel cell drones may be a good middle way between gasoline drones and battery-powered drones. Fuel Cell Drones Might Be the Best of Both Worlds Peter Sobolev/ A battery-powered drone is more like a smartphone than an RC aircraft, and most users don’t need more than modern drones’ typical 30-minute flight times. This makes them less than ideal as consumer products. Internal combustion engines require heaps of maintenance they are dirty, complex, expensive, and much more likely to fail than an all-electric drone. There’s a reason why we don’t simply use gasoline to power our drones. Gas-Powered Drones Have Problems of Their Own Paday/ With drones like these, you can refuel them in minutes, fly for hours, and complete missions that are simply impossible with battery-powered drones. The drone you can buy can operate for up to four hours, with a Maximum Takeoff Weight (MTOW) of 25kg (approximately 55lbs). Either way, the energy is stored as a liquid fuel, then converted to electrical power to drive the drone’s rotors. There are drones that use standard gasoline, and then there are drones that use “nitro”, which is a methanol-based fuel that’s common in the world of RC planes, cars, and helicopters. Most gas-powered drones are still ultimately electric it’s just that the electrical power comes from a gasoline engine. Yet, lithium-ion batteries have an energy density 100 times less than gasoline! So instead of having enough power for 30 minutes of flight, you’d have enough energy for 50 hours of flight! That doesn’t account for the engine’s extra weight, but even then, you’re looking at a massive increase in flight endurance. The average length of a 1/10 scale small-sized RC car is between 17.5 inches to 21.6 inches, the height is between 4.2 inches to 9.1 inches, and the width is between 7.8 inches to 14.4 inches. Electric car ranges have also been steadily climbing to the point where they are practical for almost all daily driving uses. A 1/10 scale RC car weighs between 3.2 and 11.2 pounds. Thanks to their ability to back energy into a small space, we have laptops, smartphones, and other devices that can last for hours or even days in some cases while offering high-performance levels. Lithium-ion batteries are the most energy-dense commercial batteries in existence.
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