FSX Ultralight Interplane Skyboy SLSA

Experience the distinct capabilities of a Czech-designed, lightweight aircraft with this complete freeware Ultralight Interplane Skyboy package by Don Halcom, featuring the Rotax 912 engine by Byron Warwick. Developed for Microsoft Flight Simulator X, it offers an authentic feel of a real-world Special Light Sport Aircraft (SLSA) configuration. This single-prop unit integrates minimal instrumentation for VFR [Visual Flight Rules] only, making it a solid choice for short-field practice and low-and-slow flight exploration.

Design Focus of the Skyboy

This sleek airframe employs a combination of metal, fabric, and fiberglass construction. It incorporates a high-wing layout, which generally contributes to excellent visibility and stable low-speed handling. The absence of flaps calls for adequate throttle management on final approach, allowing pilots to hone their energy control skills. Pilots can expect a well-proportioned cabin (up to 41 inches in width), which replicates the cozy interior typical of ultralight aircraft.

Technical Data and Operating Thresholds

Overall Length

20 ft 3 in (6.17 m)

Height

7 ft (2.13 m)

Wingspan

30 ft (9.14 m)

Wing Area

143 sq ft (13.28 m²)

Empty Weight

700 lbs (317.51 kg)

Design Gross Weight

1320 lbs (598.74 kg)

Useful Load

572 lbs (259.47 kg)

Fuel Capacity

15 gal (56.78 L)

Never Exceed Speed [VNE]

130 knots

75% Power Cruise

100 knots

Stall Speed

38 knots

Powerplant

100 HP Rotax 912S

Being a light sport aircraft, it remains comfortable within +6 to -3 g load factors. Additionally, its reflective exterior surfaces ensure high visibility in various lighting conditions.

Skyboy cruising through the skies.

Alert Regarding Textures

Because of a known issue in FSX with “parts within a part” rendering, there might be occasional texture hiccups. This is a minor visual bug and does not affect the flying characteristics. Nonetheless, it adds an extra layer of realism for enthusiasts who appreciate the quirkiness of dedicated flight simulator modeling!

Steps for Installing This Add-On

1. Create a convenient folder (for example, “Temp”) anywhere in your Windows file system.
2. Extract the contents of “skybyfsx.zip” into that newly created folder.
3. Locate the “Interplane Skyboy” folder, then copy it (Ctrl + C).
4. Navigate to “C:\Program Files\Microsoft Games\Microsoft Flight Simulator X\SimObjects\Airplanes” and paste (Ctrl + V) the entire “Interplane Skyboy” folder there.
5. Open and read the “READ_ME.txt” for any additional notes or information.
6. Launch your simulator and enjoy test-flying the Skyboy.

Additional Observations

This model emphasizes throttle-based landings as it does not include flaps—an authentic challenge for pilots looking to expand their short-final control techniques. The simple flight deck encourages basic navigation and scenic exploration, consistent with the typical usage of ultralight platforms in real-world aviation.

Crafted by Don Halcom and powered by the Rotax 912 by Byron Warwick, this freeware release on Fly Away Simulation comes as a complete standalone package. Once installed, it stands ready for immediate use in Microsoft Flight Simulator X—ideal for honing those close-to-the-ground maneuvers and discovering the joy of simple, unrestricted flight.