OS Speed 91HZ-R 3D Engine : 18642

O.S. GT15HZ II Petrol with PowerBoost Pipe : 38157The GT15HZ, which made its sensational debut as the world's first 15cc gasoline engine exclusively for 700-class helicopters, has been improved and...

The biggest, pure helicopter engine that OS have ever made delivers the levels of torque and power demanded by top fliers for both F3C and sport applications.The 15% increase in...

O.S. MAX 105HZ-R Helicopter Engine : 18750The biggest, pure helicopter engine that OS have ever made delivers the levels of torque and power demanded by top fliers for both '3D'...

O.S. MAX 105HZ-R W/Powerboost Pipe : 18751Identical to the regular 105HZ-R technically but supplied with the latest Powerboost 105 pipe. The pipe has been purpose designed to suit the 105HZ-R...

The max 50SX-H Hyper has established an enviable reputation for power, reliability and ease of use. The Max 55HZ Hyper moves that to a whole new level!, Designed primarily with...

OS Engine O.S. GT15HZ II Petrol : 38156The GT15HZ, which made its sensational debut as the world's first 15cc gasoline engine exclusively for 700-class helicopters, has been improved and upgraded...

Following on from the concept developed in the 70SZ-H, the latest 37SZ-H brings a new level of performance to '30-class' helicopters.Just about everything has been changed compared to the 32SX-H...

The best '50-class' engine on the market just became amazing with the introduction of the new 50SX-H Hyper.That CNC machined cylinder head has been developed to give better power and...