TH 39" EPP Crack Yak-55

TH 39" EPP Crack Yak-55

The 39" Crack Yak-55 brings the familiar stability and responsive 3D performance of the original Crack Yak into a larger, fully airfoiled design with improved visibility and better outdoor wind handling.  Its tapered wing, T-canalizer, side-force generators, and dual aileron-servo layout provide excellent roll authority, knife-edge stability, and predictable control throughout precision and aggressive 3D flight.

Features and Specifications

• Wingspan: 39 inches
• Estimated Flying Weight: Approximately 375 to 390 g / 13.2 to 13.8 oz
• Construction: Lightweight EPP foam with a fully airfoiled wing and carbon-fiber reinforcement
• Aerodynamic Features: Tapered wing tips, T-canalizer, and side-force generators
• Control Setup: Dual aileron servos with adjustable pushrod assemblies
• Recommended Battery: 3S 850 mAh LiPo with XT30 connector
• Flight Style: Sport, precision, freestyle, and aggressive 3D aerobatics
• Pilot Level: Intermediate to Advanced

Required to Complete

This is an airframe kit. The recommended power system, radio equipment, battery, charger, adhesive, and spinner are sold separately. No printed manual is included; downloadable PDF resources are available below.

3S Setup: Use a 3S 850 mAh LiPo with XT30 connector and the included 10 x 4.7 Slow Fly propeller. A 25C or higher pack is recommended, with 25C to 60C burst maximum being a good range for this setup.

PC11 Power System Includes

• CSP 2213 1100KV 60 g brushless motor
• BOLT 22A ESC with XT30 connector
• Four CSP-D14M digital metal-gear servos
• 10 x 4.7 Slow Fly propeller

Important: Always confirm proper CG, control direction, motor direction, and ESC throttle calibration before flight. Remove the propeller before throttle calibration or ESC setup.

Additional Required Items

• 4-channel or greater transmitter and compatible lightweight receiver
• 3S 850 mAh LiPo battery with XT30 connector
• LiPo-compatible balance charger
• Foam-Tac and CA glue as specified during assembly

Upgrades and Compatible Parts

• View the Crack Yak-55 Carbon-Fiber Upgrade Kit
• View the TMW 39-Inch Aluminum Motor Mount
• Shop Compatible 37 to 39-Inch Replacement Parts
• View Compatible LED Lighting Kits

Resources

• View or Download the Crack Yak-55 Build Manual
• Watch the Crack Yak-55 Build Video
• View the Crack Yak-55 RCGroups Build Thread