KDE Direct T-Rex 500 Flybarless Main Rotor Housing

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This is an optional KDE Direct Flybarless Main Rotor Housing, and is intended for use with the Align T-Rex 500 helicopter. This part replaces stock Align part AGNH50125. The Flybarless Main Rotor Housing upgrade encompasses the latest technology, for an optimum setup of the flybarless mechanics, incorporating a series of design enhancements that provide a truly noticeable increase in flight-performance and capabilities for hard-3D and F3C flight. Direct-mounted washout arms guarantee true-parallel alignment of the linkage rods and an interaction-free setup to the main shaft. No more hassles with the main shaft clamp and difficult linkage alignment, simply bolt on the washout arms and go fly with an optimal setup every flight. An M2 clamp mechanism is built into the upgrade design, providing a solid hold to the main shaft that is truly noticeable in flight with a significant reduction in shaking, bobbing, and other effects evident under hard 3D flights.  


  • Strengthened Housing Design: Geometry has been increased in key areas for significantly raised strength and stiffness characteristics in flight, without additional weight.
  • Innovative Clamping Mechanism: All designs include a M4/M3/M2 clamping mechanism for a rock-solid lock of the housing to the main shaft. This key design aspect provides unprecedented accuracy for all types of flying styles.
  • Direct-Mount Washout Arms: The washout arms are direct-mounted to the main rotor housing for optimal alignment of the arms and Flybarless linkages. No shaft clamps or alignment features to worry about –simply bolt on the washout arms and enjoy the optimal Flybarless mechanics in flight.
  • Full CNC-Machined Construction: All housings are machined from Aluminum 6061-T6 for optimal strength and weight characteristics.
  • Weight: 31g FEA optimized design for maximum strength and minimum weight.

NOTE: To achieve the best possible setup and perfect alignment of the flight mechanics, the following ALIGN flybarless components are recommended for use with the new design:

AGNH50133: 500FL Main Shaft
AGNH50127: 500FL Metal Washout Control Arms
AGNH50130: 500FL Linkage Rod (A) Set


  • (1) TREX 500 Series Aluminum Flybarless Main Rotor Housing
  • (2) 3x0.5x10mm Socket Head Cap Screws (Class 12.9 BP Alloy Steel)
  • (2) 3x0.5x12mm Socket Head Cap Screws (Class 12.9 BP Alloy Steel)

This product was added to our catalog on January 28, 2011.

Jermaine Minors
Thursday, Sep 22 2011 (about 4 years ago)
KDE Direct T-Rex 500 Flybarless Main Rotor Housing
Very well made piece!! Function and bling all in one! Have to give it 4 stars though because the hole for the Jesus Bolt is a bit over sized, therefore allowing the bolt a bit too much wiggle room, and the space for the nut on the other side is too big of a square and too shallow for typical size locking nut that comes with the main shaft kit. Mine upon tightening simply ground out the aluminum and now turns freely. The up side is that the head comes with two bolts that clamp on either side of the head and these are enough to hold the head on VERY well. the built in mixing arm mounts....in a word....PERFECT! My first FBL conversion and my arms came out perfectly level.

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