Merlyn Wastegate mod for the Justflight Turbo Arrow III and Turbo Arrow IV

This add-on introduces the Merlyn wastegate to the Justflight Turbo Arrow III and IV, enabling consistent manifold pressure up to 19,500 feet, replicating real-world Merlyn performance. It prevents engine overboost and maintains stable operation. A brief overboost warning may occur with rapid throttle movements, but pressure stabilizes quickly. The modification is still in development, and some instrument indicators, such as EGT, may not function correctly.