GT-VX1 Component Details

Airframe: The airframe of the aircraft is machined from 6061-T6 extruded aluminum tubing, plate and solid stock. 303 stainless and 4130 Chromoly are used for many shaft components, as well as various plastics for bushings. There is no welding on any structural components.

Rotor Head: Our rotor head is designed / machined to our exacting standards, as are all the aircraft components.

We use the highest quality, full-complement, dual-row, angular contact sealed bearing available. A ¾” gimbal offset and accompanying trim spring add dynamic stability to the aircraft.

A hydraulic rotor brake system is integrated directly into the torque tube. The brake pad assembly is pushed outward to the ID of the PR ring gear much like a drum brake. When disengaged, the brake pad retracts slightly away from the ring gear, and is completely clear of the rotating components with no chance of interference during flight.

The outward force of this system is much more effective than traditional gyro rotor brakes that push upward on the bottom of the ring gear and do little more than causing excessive flexing of the disk assembly.

Plastic teeter-stop inserts prevent metal-to-metal contact of the hub bar and rotor head.

Pre-Rotator: The PR drive system mounts to the engine gearbox. We offer adapter plates for Rotax B, C, and E gearboxes as well as some Hirth models.

GT-VX1 PR Drive - 3203

A Poly-Vee drive belt is tensioned against the drum pulley, sending the power through the drive shaft system.

Our proprietary drive engagement system pulls the drive belt outward to the containment guards when dis-engaged. This assures that the belt is completely out of contact, and not dragging on the drum pulley during flight. The power is then transmitted through our own custom 90° gearbox where the rotation direction is reversed. Power is then delivered up through our telescoping coupling to the Bendix unit on the rotor head.

A very quick spin-up of 200+ RRPM is easily achieved.

Pre-Rotator Engagement Lever: The PR system is engaged by lifting a lever that resembles a “collective” on a helicopter.

A safety catch must be released prior to engaging the pre-rotator (PR) drive.

Once the blades are up to the desired speed, the lever is lowered, and the safety catch snaps shut. This prevents the drive system from being unintentionally engaged during flight.

Throttle Options

Twist Throttle:

The twist throttle is integrated into the PR engagement, or “collective” lever. Throttle is advanced by twisting outward. (like a helicopter, but opposite from a motorcycle).

The benefit of this system is it allows for quick and frequent throttle adjustments. Also, since it is mounted upon the same lever that is used to engage the pre-rotator, it allows easy engine RPM adjustment while finessing the pressure applied to the PR drive system. Results: a very quick and smooth spin up of the blades.

Throttle quadrant:

For those who desire a more traditional throttle assembly, we offer a quadrant system that attaches to the seat pan.

**Both throttle systems feature our proprietary unidirectional friction system. The friction disks are only active and provide resistance to keep the throttle from closing but are by-passed as the throttle is being advanced. This makes for a reliable, maintained throttle position and silky-smooth, effortless adjustments.


The 56.5″ tall x 48″ wide tail section includes a stationary leading edge with an independent rudder section. The horizontal stabilizer is (ground) pitch adjustable.

All the internal ribs are machined from ½’ inch solid 6061-T6 aluminum plate. 22 Ga 5052 aluminum skin is laser-cut including all rivet holes. Perfect alignment! We can deliver fully assembled, or you can come to our shop to assemble and rivet yourself.

Instrument Pod:

The high-tech machined theme of the entire aircraft carries through to the instrument pod as well.

The side plates are machined from solid ½” thick aluminum. The machining process remove all but the rivet and bolt mounting points, and .050” thick side walls.

We offer several choices for instrument panel layout, or, send us a sketch of your desired layout and your instrument sizes. We will design and machine a custom panel face for you! (Included with each kit)

The standard pod face is 8” wide x 10” tall. We do offer a 12” wide x 10” tall version for those who really like a lot of gadgets.

Each instrument pod includes a removable back plane for terminal strips and electrical system connections.

A Pitot tube and hose fitting is included.


The cyclic control stick transfers the pilot’s inputs through a simple “pump-handle” style control system. Less moving parts = dependability and fewer joints that could impose slop in the controls.

The position of the cyclic grip is positioned so that the pilot’s wrist is resting across their thigh, for a casual, comfortable position.

**We offer an optional push-to-talk button to be mounted directly in the top of the cyclic handle

Nose Wheel:

The nose wheel design provides the best of both worlds: The safety and forgiveness of a full-caster system, while providing the smooth, precise ground control of a hard-linked system.

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The nose wheel assembly is linked to the rudder pedals with push rods through a spring compliance device. This device allows the nose wheel to free caster +- 8° before hitting the hard stops. If you happen to touch the nose wheel down with it slightly askew from the direction of travel, It will straighten itself out and prevent you from darting off to the side of the runway.

Brake Calipers:

Our hydraulic brake calipers and floating disk system offer dependable stopping power with minimal weight. Calipers feature dual ¾” hydraulic pistons, quad ring profile seals, metal backed brake pads and standard automotive style bleeders.

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Brake Caliper

Master Cylinder:

Our dual master cylinder is as attractive as it is functional. The front piston controls the wheel brakes, and the rear piston is for the rotor brake.

A common, easy to view reservoir feeds both systems.

Both are fitted with a latching mechanism to keep the wheels / rotor secured. A simple touch of the lever to activate, and a simple squeeze to release.


Machined aluminum hubs, spun aluminum wheels, and triple ply tires complete the main wheel assembly.

Seat and Harness:

An aluminum Kirkey ® racing bucket seat with contoured padding and upholstery provide a wonderfully comfortable and secure feeling. We provide a 4-piont harness system for safety.

Foot Pedals:

The foot pedals can be mounted in 2 different locations to suit pilots of different heights.


A pair of 960# /in coil springs provide plenty of forgiveness for those “non-greaser” landings!

Cable Control:

The foot pedals are linked to the rudder via 5/32” stainless cable routed through precision machined cable pulleys with ball bearings and cable retainers.

Fuel tanks:

Two spun aluminum fuel tanks offer a total of 7.5 Gallons capacity.

A central manifold provided connects the tanks together for a single fuel source. This manifold also allows for 2 separate outputs (Mechanical and electric fuel pumps), a 1/8” NPT output for primer pump circuit, and a spring-loaded fuel sampling valve is included. (Manifold is located at the lowest point in the fuel system for water separation.)

SAE 5-Hole Fuel level sender port included in one tank, as well as independent air vent fittings for each tank.

**The size and location of the fuel tanks has been carefully designed in order to position them to be very near the CG of the aircraft. A hang-angle change of only 1° is seen from full to empty tanks.

Engine Mounts:

The most popular engine of choice for the GT-VX1 has been the Rotax 582. Widely available and great power to weight ratio.

We also have engine mounts for a Hirth 3203, and we will design for other power plants that are suitable of the gyro frame geometry.

You will enjoy the convenience of the built in tie-down anchor points for use when hauling your machine!

Folding Mast:

A key element in the GT-VX1 design is the folding mast system which provides convenient transport and compact storage.

Once the blades have been removed, the mast can be lowered in less than 5 minutes. Disconnect trim spring and telescoping PR drive shaft, loosen 1 bolt and remove 3. The upper mast easily folds forward, and control rods remain connected, and the tail remains supported.

The machine measures Just over 6′ tall when in the folded position.

Your tail looks really cool and was constructed with high precision.  It was so easy to install due to your fixing hardwares are made so precisely. He has been so satisfied at your precision machining and workmanship!    Mr. Yozaburo Imai  (Japan)