HX15 Stirling Helicopter Engine Model Key benefits Stable, consistent power output through sustained temperature differential between hot and cold cylinders, supporting steady rotor performance. Reduced piston weight and improved sealing and wear resistance from glass over metal cylinder piston material, lowering friction and minimizing surface strain during speed operation. Clear, serviceable mechanical power transfer that converts reciprocating motion into driven rotation for main and tail propellers with predictable gear ratios. Features and function 16cylinder swash plate Stirling design with hot and cold cylinders arranged in an opposed structure to limit heat conduction between hot and cold sides and enhance heat exchange efficiency. Glass over metal cylinder piston material selected for hardness, corrosion resistance, and long service life. Opposed cylinder piston movement transmitted through two round gears to adjust speed ratio, plus four bevel gears arranged at 90 degrees to change the direction of power output. Power is mechanically routed to the helicopter main propeller and the tail small propeller, making the mechanical layout intuitive and easy to follow. Mechanical design focused on improving conversion rates from piston motion to propeller drive. Material and performance highlights Cylinder piston: glass over metal material for lower mass, improved sealing, enhanced wear resistance, and resistance to rust. Thermal layout: opposed hot and cold cylinders reduce heat transfer between sides, maintaining a larger temperature differential for longer durations and more consistent output. Applications and use scenarios Model helicopter powerplant: direct use as the engine module for scale or experimental RC helicopters where Stirling cycle operation is desired. Educational and demonstration unit: demonstration of Stirling engine principles, swash plate mechanics, and gearbased power transmission in classroom or laboratory settings. Development and testing platform: evaluation of heat exchange strategies, piston materials, and gearbox arrangements for smallscale engine research. What to expect A compact, mechanically transparent Stirling engine assembly designed for model helicopter propulsion and experimental use. Intuitive gear train layout that clearly shows speed ratio change and 90 degrees power redirection to propellers. Durable piston materials and opposed cylinder layout aimed at stable thermal performance and reduced maintenance needs. Note Model name: HX15. Configuration: 16cylinder swash plate Stirling with hot and cold cylinders in opposed arrangement. Power transfer: two round gears for speed ratio adjustment and four bevel gears at 90 degrees for directional output to main and tail propellers.