Tron 5.5 ORION Helicopter Kit (w/o Blades) + RadioMaster GX15 Radio (Standard, Prominence Red)

Start your 550-class build with a matched airframe and radio. This bundle pairs the Tron 5.5 ORION Helicopter Kit (w/o Blades) with the RadioMaster GX15 Radio (Standard, Prominence Red), a Gemini 2.4GHz ExpressLRS transmitter with a top-mounted touchscreen.

What’s Included

• 1 × Tron 5.5 ORION Helicopter Kit (w/o Blades) (TR550-989)
• 1 × RadioMaster GX15 Radio, Standard / Prominence Red

Tron 5.5 ORION Highlights

• 100% full carbon frames with a completely new upper and lower frame design
• Extruded aluminum CNC battery tray with an easy lock/unlock design, for easier battery insertion and removal
• Adjustable tail belt tensioner that eliminates tail belt slap
• Full CNC aluminum rotor head with a redesigned all-metal swashplate and larger main blade grips
• 18mm CNC main gear (137T) and a 14mm one-way bearing
• 3 large bearings for main shaft support
• Tail servo mount with aluminum adapters for full or mini size servos
• Supersonic canopy mounts included

RadioMaster GX15 Highlights

• STM32 H7 processor
• Gemini 2.4GHz ExpressLRS with dual Semtech SX1281 RF chips
• 3.5-inch top-mounted color touchscreen (600 nits)
• V6 high-precision Hall sensor gimbals
• Single USB Type-C port for data, charging and simulator use
• Smart active balance charging, external module support and external SD card support

Tron 5.5 ORION Specifications

• Main blade size: 550–560mm (not included)
• Tail blade size: 92–97mm (not included)
• Dry weight: approx. 1400g without blades and electronics
• Stock tail ratio: 4.21 (19T rear pulley, 80T front pulley)
• Stock motor pinion: 16T (6mm bore), main gear ratio 9.78

Required to Complete the Build (Not Included)

• ESC, 80A–160A
• Motor, 4020–4025 size (1200KV)
• Flybarless (FBL) unit
• 3 × mini cyclic servos and 1 × mini or full size tail servo
• 6S 4500–5800mAh LiPo battery (typical)
• 550mm main blades and 95mm tail blades
• ExpressLRS 2.4GHz receiver, or an FBL unit with an integrated ELRS receiver, to connect your helicopter to the GX15

Compatibility Note

The GX15 transmits on ExpressLRS 2.4GHz, so your helicopter needs an ELRS 2.4GHz receiver to work with it. The kit does not include a receiver or flybarless unit.