TL90 Helicopter Rotor Height and Level Gauge The TL90 gauge is a precision tool designed for both stabilizerequipped and flybarless helicopters. It offers accurate, digital height and horizontal detection for efficient rotor adjustments and flight performance. Key Features and Benefits: Compatible with helicopters using stabilizers or flybarless systems, ensuring versatile use across different models. Builtin digital measurement system automatically detects rotor height and displays results clearly on a backlight LCD screen for easy reading in various lighting conditions. Automatic horizontal detection ensures your rotor is leveled for stable and safe operation. Automatic screen inversion function allows convenient viewing from any angle during adjustments. Supports main rotor lengths from 250mm to 800mm (9.84 to 31.50 inches), covering a wide range of helicopter sizes and setups. Performance and Reliability: precision measurements help reduce setup time and improve flight stability by ensuring correct rotor height and level alignment. Clear backlight display enhances visibility in both indoor and outdoor environments. Rugged construction designed for consistent accuracy during repeated use. Practical Applications: 1. Preflight checks to verify rotor height and horizontal alignment for maximum safety and efficiency before takeoff. 2. Maintenance and tuning sessions where accurate rotor level detection improves mechanical adjustments. 3. Helicopter assembly or upgrades, ensuring newly installed rotors are correctly configured for performance and handling. The TL90 gauge combines dependable accuracy with userfriendly operation, making it a valuable addition to any helicopter pilot's maintenance and setup toolkit.