The Ultra-light Airplanes are typically driven by a 4 stroke engine, “Rotax 912” type.
This type of engine is reliable, powerful and is a “reduced weight” motor but it still adopts the two independent carburetor connected with too small pipe.
Major defects with the original manifold system:
This original plan, it has some one remarkable defects
- The slight going out of phase of the opening of 2 butterfly valves (usually due to the cables) often creates unpleasant imbalances of the load (i.e. power produced) between the motor banks which generates abnormal and alarming vibrations.
- In a case of broke an wire command to one butterfly valve, must switch of the engine, or open also the other carburetor, and going only in full power.
- Under 2500 RPM,(during the heating time), the engines made a lot of vibration.
- Absence of vibration regardless of the difference in the opening of carburetor.
- Possibility of continuing to fly (to 50% of power) even in the case of breakage of a wire command of a carburetor.
- Better balancing equally used cylinders independently from each other.
kit, available for Rotax 912 e Rotax 914, has 9 components.
- 2 intake manifolds
- 1 big pipes
- 2 Rubber manifold
- 4 Metal clamp