In the mid 1880's the world was introduced to the first two stroke engine that worked on the principle of compressing an air/fuel mixture in the operating cylinder. From that point it was only a short ten years or so for the concept to develop close to the highly efficient engine as we know it today, with ports for fuel induction, transfer and the removal of burnt gasses.
For the next 100 years the only advancement has been to improve the efficiency of introducing fuel and removing the exhaust gasses. There have been attempts to completely separate those two functions, but they have only been successful in achieving one thing, to destroy the one big advantage of the two stroke engine, It's simplicity.
At Sphere Hobbies, we have an entire line up of light weight, strong, rugged, powerfull and cost efficient OS Engines. Use our online shopping cart to get one for yourself.