XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)
XTPRO GLJ Model 25 CSE (MSFS 2020)

XTPRO GLJ Model 25 CSE (MSFS 2020)

GLJ25CSE-V1-MSFS2020-DL
CAN$49.95

COMMING SOON!  The GLJ Model 25 Classic SE is our new study-level Gates Learjet 20 Series business jet addon for Microsoft Flight Simulator 2020 (compatible with MSFS 2024)!

This complex aircraft simulator features the classic retrofitted GNS 530 virtual cockpit, 14 liveries, full PBR materials and textures, high resolution 3D models, hundreds of animations, visual effects, and sound effects, custom aircraft systems, support for optional third-party GPS/GNS systems and radars*, interior/exterior dynamic lights, and a new 300-page flight manual available in English or French.

*: See "Product Features", below.



Our New Native Gates Learjet 25 Addon for Microsoft Flight Simulator 2020 (compatible with MSFS 2024)

Our new GLJ Model 25 addon is a native MSFS aircraft from top to bottom! 3D models and animations from our previous versions for other platforms needed to be fully revised, modified and optimized for the new simulator. Collision meshes, “occluders”, and new “levels of details” were added to the models to conform to the official recommendations and to improve performance in multiplayer and AI modes. Aircraft systems were rebuilt in accordance with the new simulator’s requirements, and over 30,000 lines of code for the model behaviors had to be rewritten and organized within the new MSFS XML template system. New PBR materials and textures were created, along with new dynamic lights and visual effects.

Our Gates Learjet 25 model has never appeared more impressive than within the visually stunning graphics environment of the new Microsoft Flight Simulator!

Most notably, we also produced a new sound package in Audiokinetic Wwise, a powerful sound authoring software for video games that sets new standards in MSFS. Authoring interactive sounds and implementing an immersive, realistic, and accurate representation of a simulated environment with Wwise for our Learjet Model 25 addon was a complicated task but the impact on the simulation is worth mentioning.


A Fighter in Civilian Clothing

Nicknamed “fighters in civilian clothing” because of their sleek design and amazing performance, the classic Lear Jet/Gates Learjet 20 Series aircraft were the first true private jets and redefined business aviation during the 1960s and 70s, flying high above the weather at transonic speeds. Their capabilities earned them a place among the extreme aircraft, setting record after record. Capable of maneuvers you would never attempt with another civilian aircraft, their performances as general aviation business jets are simply unequaled, according to real-world Learjet 20 Series pilots, even by today’s standards!

With the longer-range Gates Learjet Model 25D, by which this addon is inspired, came a longer cabin, increased seating capacity, more flexible loading options, greater fuel capacity and a sleek-looking stretched fuselage.

A Unique Addon for your Hangar

The Xtreme Prototypes GLJ Model 25 Classic SE for MSFS is a next generation addon designed to take advantage of the new and more powerful gaming computers and graphics hardware that are available today. Nothing was spared in our efforts to faithfully reproduce its retrofitted instrument panels, still in use today, carefully modeling, and animating each “steam gauge” and mechanical device with all the necessary moving parts. Except for the GNS 530 and radar screens, the ADDUs, and the new radio’s VFD displays, which are flat by nature, no legacy 2D gauges are used in our model.

The result is a unique addon that strives to bring you not only the actual feeling of flying a high-performance aircraft now equipped with modern avionics, but also the spirit of maneuvering such a vehicle at times where large LCD screens and powerful computers did not exist, and where pilots needed to know how to fly and navigate with minimal resources and rely on their own experience, abilities, and judgment.

At Xtreme Prototypes, we consider our addons as real micro aircraft simulators rather than just games. Our products require extended periods for development and testing by a passionate team of artists, technicians, and pilots. We pay attention to every detail, and we do our best to make sure that we provide our users with the best flight simulation experience they can get within the limitations of the available simulation platforms.

We believe our GLJ Model 25 addon is the most advanced, detailed, and faithful classic Learjet simulation you can find.


Designed by Users for Users

Becoming one of our users makes you an important member of our development team. This new version of our GLJ Model 25 addon is the product of the many ideas, comments, and suggestions we received from desktop pilots like you from around the world since version 1 of our 20 Series business jet addons for Microsoft Flight Simulator X was launched back in 2009.

We wish to express our gratitude to all our users, followers, reviewers, test pilots (real and desktop), ex-Learjet employees, partners, and friends for their contribution to the making and success of this extreme aircraft simulator.

Thank you for your continuous support!


Download the Manual

Download the full 300-page flight manual
(English version, 78 MB, PDF format)

Manuals are updated frequently, make sure you have the latest version.


What you Need to Know

  • Optional third-party GPS/GNS navigation systems and radars are not included and must be purchased separately. The basic GNS 530 that comes with MSFS is included. See "Product Features", below.
  • You must accept the end-user license agreement before you can download, install and use this software.
  • Please read "Minimum System Requirements", below.
  • Software features, prices and release dates are subject to change without notice. Please refer to the “Release Notes” at the beginning of the manual for last minute changes. Some functionalities may differ from those in the real aircraft due mainly to software limitations in MSFS.

The Xtreme Prototypes GLJ Model 25 Classic SE is an add-on software package that requires Microsoft Flight Simulator 2020 (or later*, see below) to be installed on your personal computer. The software is not a stand-alone product and cannot be used without the underlying simulation platform.

Note: The Xbox version is not available at this time (see “Release Notes” at the beginning of the manual).

IMPORTANT: Xtreme Prototypes next generation addons are designed to take advantage of the new and more powerful gaming computers that are available today. Increased performance will be noticed on more powerful systems. Before purchasing this product, make sure you have the minimum system requirements or better. For obvious reasons, downloads are not refundable.


  • Flight Simulation Platform: Microsoft Flight Simulator (MSFS) 2020 (or later*) for Windows PCs
  • Operating System: Microsoft Windows 10 (update 1909)/11 or later, 64 bits (Windows 11 recommended)**
  • Computer Memory (RAM): 16 GB (32 GB or more recommended)**
  • Processor: Quad Core 3.0 GHz (Octa Core 3.7 GHz or better recommended)**
  • Hard Drive Space: Downloaded compressed zip file size approx. 3 GB; addon size approx. 6 GB when copied to your MSFS Community Folder (MSFS 2020 requires at least 150 GB**)
  • Graphics Card: A high-end graphics card with at least 8 GB GDDR5 or better is highly recommended. Make sure you have the latest driver for your graphics card.
  • Graphics: DirectX 11/12**
  • Internet Connection: 20 Mbps (50 Mbps or better recommended)**
  • Other: Monitor, wheel mouse, game controller (joystick or yoke), pedals (optional), sound card and speakers, Adobe Acrobat Reader and a printer (for reading/printing the manual). A wheel mouse is required to actuate 3-position switches and knobs.

*: This software version is a native MSFS 2020 add-on aircraft that is also compatible with MSFS 2024. New addon versions may become available for future versions of MSFS, including MSFS 2024 (see “Release Notes” at the beginning of the manual). Make sure you download and install the correct addon version for your version of MSFS.

**: Refer to the MSFS 2020/2024 documentation for more information about minimum system requirements


General Features

14 aircraft variations inspired by actual and fictitious models and liveries*: 

  • (USA Demo) White, Black, Gray and Red (fictitious tail number N25XP)
  • (AUS) Gray, White and Black (fictitious tail number VH-KVXP)
  • (BRA) Green, Yellow and Blue (fictitious tail number PR-KBHXP)
  • (CAN) White, Turquoise and Red (fictitious tail number C-KJVXP)
  • (CHL) Blue, Gray and Yellow (fictitious tail number CC-KFGXP)
  • (DEU) White, Gray and Turquoise (fictitious tail number D-GFXP)
  • (FRA) White, Blue, Red and Gray (fictitious tail number F-QAXP)
  • (GBR) White, Blue and Red (fictitious tail number G-AGXP)
  • (MEX) White, Brown and Black (fictitious tail number XA-KZXP)
  • (NASA Research) White and Blue (fictitious tail number N617XP)
  • (US Army) Green Camo (fictitious tail number 68076XP)
  • (USA) Black, Orange and White (fictitious tail number N384XP)
  • (USA Charter) Red, White and Blue (fictitious tail number N256XP)
  • (USA) Red, White, Blue and Gold (fictitious tail number N958XP)

*: All liveries are imaginary, though some may be inspired by actual airplane liveries. Any match with actual tail numbers is a pure coincidence. See appendix 7 in the manual.


Flight Model Features

Optimized 20 Series flight dynamics to simulate the performance of a high-powered civilian jet aircraft, within the present limitations and capabilities of the available simulation platforms: 

  • Two General Electric CJ610-8A single-spool turbojet engines (2,950-pound static thrust at sea level)
  • Service ceiling: 45,000 ft.
  • Absolute ceiling: 51,000 ft.
  • Maximum speed: 359 KIAS
  • Maximum Mach: Mach 0.82 (at 24,000 ft.)

20 Series Aircraft Systems

The following Learjet 20 Series aircraft systems are simulated to conform as closely as possible to the operation of the real airplane, within the present limitations and capabilities of the available simulation platforms: 

  • Flight controls
  • Stall/overspeed warning systems with stick nudger/puller and stick shaker
  • Electrical system (can be connected to a GPU available in the simulator)
  • Cockpit and cabin lighting systems with independent controls and dimmers, including emergency lighting
  • Emergency batteries
  • Hydraulic system (including an electric auxiliary hydraulic pump)
  • Landing gear, anti-skid system, differential brakes
  • Fuel system (including cross-feeding, and wingtip tanks fuel jettison system)
  • CJ610-8A power plant
  • Fire detection and suppression system
  • Pneumatic (high pressure), bleed air, pressurization, and environmental control systems
  • Air conditioning and cabin temperature (H-valve) system
  • Anti-ice system (simulated within the limitations of the of the available simulation platforms), with ice effects on the windshield, windows, and exterior aircraft surfaces
  • Automatic flight control system (AFCS) with autopilot, flight director, dual yaw damper, and speed hold mode (the Lear J.E.T. autopilot is retrofitted to be fully functional in GPS/GNS mode and compatible with the default autopilot available in the simulator)
  • RVSM system, complete with digital altimeters/altitude preselectors (ADDUs) with blue VFD display, analog standby altimeter, and control panel
  • Caution and warning system (annunciator panel)
  • Avionics, radios, and classic navigation systems: COM1, COM2, NAV1, NAV2, ADF1, ADF2, transponder, DME, marker beacons
  • Generic GNS 530 navigation system (see “Aircraft Interior 3D Model Features”, below)
  • Generic weather radar 3D model (see “Aircraft Interior 3D Model Features”, below)
  • Custom ground proximity warning system (GPWS) with aural alerts
  • Emergency gear extension system
  • Passenger and crew oxygen system
  • Main entry door (fully animated)

Aircraft Exterior Model Features

Fully animated exterior 3D model, inspired by the real Gates Learjet Model 25D aircraft (optimized for MSFS):

  • 7 levels of details (LODs) to improve performance in multiplayer and AI modes
  • 4096 x 4096 high resolution PBR textures
    • High resolution decals and markings
    • Unique livery for each aircraft variation (14 liveries in total)
  • Movable aerodynamic control surfaces:
    • Horizontal stabilizer (moving tail)
    • Elevator
    • Ailerons with trim and balance tabs
    • Flaps
    • Vertical stabilizer/rudder with trim tab
    • Spoilers
  • Fully animated landing gear, complete with flexible hoses, landing and taxi lights, anti-skid system, snubbers, and more
  • Fully animated main (passenger and crew) door lower and upper sections
  • Detailed CJ610-8A power plant with animated (compressor and turbine) blades and inlet guide vanes
  • Fully animated and highly detailed thrust reverser on both engines
  • Dynamic lights with real projected light beams:
    • Independent left/right 2-intensity landing and taxi lights
    • Animated rotating beacon lights (belly, tail)
    • Right wing inspection light
    • Recognition lights (optional on the left wingtip tank)
    • Navigation lights (wing, tail)
    • Strobe lights (wing, tail)
  • Animated stall vanes on the nose
  • Optional nose boom with animated vanes
  • Three user-selectable pilots (with headset and optional sunglasses)
  • “Remove before flight” (parking) items

Aircraft Interior Model Features

Fully animated interior 3D model of the classic retrofitted GNS 530 cockpit and cabin (optimized for MSFS):

  • 8 levels of details (LODs) to improve performance in multiplayer and AI modes
  • High resolution virtual cockpit with retrofitted instrument panels
  • Full-3D animated “steam” gauges, switches, knobs, levers, light indicators, and flight instruments with localized tooltips in both English and French
  • New radios with yellow digital VFD front displays and standby frequencies to replace the original sets with analog displays from the 1960s: COM1, COM2, NAV1, NAV2, ADF1, ADF2, ATC/XPDR
  • Fully animated 3D model of a generic GNS 530 navigation system, pre-programmed for the basic GNS 530 that comes with MSFS. Screen, light, buttons and knobs can be programmed to work with most existing and future third-party navigation systems*. Experimentation may be required.
  • Fully animated 3D model of a generic weather radar. Dummy radar screen included. Screen, light, buttons and knobs can be programmed to work with most existing and future third-party radars*. Experimentation may be required.
    *: Optional third-party GPS/GNS navigation systems and radars are not included and must be purchased separately.
  • Highly detailed instrument panels:
    • Captain’s panel
    • Center panel
    • Copilot’s panel
    • Annunciator panel
    • Thrust reverser control panel
    • Center pedestal
  • 4096 x 4096 high resolution PBR textures
  • Advanced cockpit lighting system:
    • Dimmable cockpit/cabin ceiling lights (0-100 % brightness)
    • Dimmable map lights (captain’s, copilot’s, controlled independently, 0-100 % brightness)
    • Dimmable glareshield yellow flood lights (captain’s side, copilot’s side, controlled independently, 0-100 % brightness)
    • Dimmable backlit panels (0-100 % brightness)
    • Dimmable annunciators and other panel lights (0-100 % brightness)
    • Dimmable landing gear status lights (0-100 % brightness)
    • Dimmable instrument lights and post lights with independent controls for captain/center/copilot instrument panels (0-100 % brightness)
    • Cockpit/cabin emergency lighting
    • Cabin lighting system (ceiling lights, signs, entry lights, refrigerator blue light, passenger reading lights with individual switches)
      Note: Cockpit and cabin environment lights, panel instrument lights, panel post lights and flood lights are true dynamic lights, like in the real world.
  • Animated control columns and yokes (hidable, user-selectable), with functional autopilot remote buttons
  • Stick nudger/puller and stick shaker with animation and sound
  • Animated rudder pedals with differential brakes
  • RVSM system, complete with digital altimeters/altitude preselectors (ADDUs) with blue VFD display, analog standby altimeter, and control panel
  • Automatic flight control system (AFCS) with autopilot, flight director, yaw damper and speed hold mode
  • NAV1 or GPS/GNS navigation modes
  • DME head
  • Custom ground proximity warning system (GPWS) with aural alerts
  • Lear engine sync spinner
  • Analog and digital clocks with stopwatch
  • Lear Jet Stereo “Jetstar 8” 8-track tape player that plays selected music tracks (a tribute to the inventive genius of Bill Lear)
  • Oxygen valves and fan control knob
  • Pilot seats with adjustable/retractable armrests
  • Optional sheepskin pilot seat covers
  • Animated sun visors (foldable, slidable)
  • Hidable throttle quadrant
  • Thrust reverser subthrottles
  • Black leather interior with dark honey beech wood cabinets
  • Fully modeled passenger seats, cabin tables with props, cabin toilet, front and rear cabin curtains
  • Cabin refrigerator with light, animated door and props
  • Cabin TV

Dynamic Lights and Visual Effects

  • Cockpit/cabin lights*: panel yellow flood lights, ceiling lights, map lights, instrument lights, panel post lights, passenger reading lights, entry lights, refrigerator light, bounce and ambient lights
    *: Cockpit instruments and all interior objects are illuminated with real dynamic lights, like in the real world.
  • Aircraft lights, some animated: landing, taxi, recognition, navigation, strobes, rotating beacon, wing inspection
  • Engine smoke effect
  • Engine exhaust heat effect
  • Engine contrail effect
  • Fuel jettison effect
  • Wing vortices and vapor trails
  • Windshield and windows rain effect
  • Windshield, windows and structural ice effects

Sound Effects

  • Genuine interactive sound package entirely authored in Audiokinetic Wwise (soundbank)
  • 20 Series 3D sound set, including starter and engine sounds recorded from the real aircraft and positioned in the 3D space
  • Over 80 additional cockpit stereo sound effects, many from the real aircraft: switches, knobs and levers, pneumatic valves, blower fan, alerts and horns, Learjet unique brake sounds, nose wheel steering sound, cabin door, music for the tape player
  • More than 100 sounds in total

Miscellaneous

  • Easy MSFS method of installation (“Community Folder”)
  • 8 basic cockpit presets (*.flt) for the different phases of the flight, including “Cold and Dark” (hangar and parking/apron) and “Auto Start” (taxi, runway, climb, cruise, approach, final)
  • 24 interior camera views
  • 14 exterior camera views
  • A 300-page flight manual available in English or French (printable PDF format, requires Adobe Reader)
  • Advanced MSFS localized instrument tooltips in English or French
  • Customization packages, including a “paintkit” for creating your own aircraft liveries

IMPORTANT:

Software features, prices and release dates are subject to change without notice. Please refer to the “Release Notes” at the beginning of the manual for last minute changes. Some functionalities may differ from those in the real aircraft due mainly to software limitations in MSFS.

The GNS 530 physical 3D model in the virtual cockpit is preprogrammed for the basic GNS 530 that comes with MSFS. The weather radar model shows a dummy radar screen by default. Navigation system and radar 3D models are user-programmable and may be compatible with most existing and future third-party add-on software. Instructions are provided in appendix 2 of the manual for adding third-party addons to the cockpit of the GLJ Model 25 add-on aircraft. Experimentation may be required.

Optional GPS/GNS navigation systems and radars are not included and must be purchased separately from third-party vendors/developers (MSFS basic GNS 530 is included). Some third-party navigation systems may change the behavior of the autopilot. Some third-party add-on software may not be compatible with the latest versions of MSFS. Please contact the developer for support. Xtreme Prototypes cannot provide technical assistance for third-party addons.


Reviews about our GLJ Model 25 Classic SE addon for MSFS will be posted here when available.


Listed below are the latest available patches for your Xtreme Prototypes GLJ Model 25 Classic SE addon for MSFS - for registered users only. To download these files, please login to your Xtreme Prototypes online account.


No files available at this time.