Start here
A few places to begin, from the aircraft’s story to the people who fly it.
Aircraft and configuration
The Learjet 25 Classic uses two CJ610 engines, retractable tricycle gear and hydraulic flaps and spoilers. The Xtreme Prototypes manual describes manually powered elevator, aileron and rudder controls, with electric secondary trim.
Learjet 25 Classic
Xtreme Prototypes · Read more ↗Meet Learjet 25 Classic
The Learjet 25 Classic uses two CJ610 engines, retractable tricycle gear and hydraulic flaps and spoilers. The Xtreme Prototypes manual describes manually powered elevator, aileron and rudder controls, with electric secondary trim.
History & design
A longer-cabin member of the early Learjet family
The Model 25 extended the early Learjet concept with a longer cabin and greater seating and loading flexibility. The later 25D added fuel capacity for longer flights. Xtreme Prototypes models that Gates-era development, and traces its own 20-series add-ons back to 2009. Its GLJ25 therefore represents the turbojet generation of Learjets, with its operating character kept separate from the later turbofan-powered 30 series.
Xtreme Prototypes · Learjet 25 Classic — simulator documentation ↗Xtreme Prototypes manual, introduction pages 1-3 and welcome; the modeled 25D is distinguished from the wider Learjet family.
Systems & details
Controls and equipment
The simulated STICK N/P function uses the autopilot for stall nose-down and overspeed nose-up commands; recovery leaves attitude hold engaged. The four-way yoke trim switch is disabled, with pitch and roll trim available through separate bindings.
Reading the classic engine instruments
Xtreme Prototypes’ GLJ Model 25 manual describes separate engine rpm, exhaust-gas-temperature and engine-pressure-ratio indications. The EPR gauges include adjustable target markers, while the electrical-system description identifies the AC supplies needed by particular instruments. The result is a cockpit in which power setting and instrument availability require attention to more than one display. These details describe the simulated classic Learjet panel and help explain why its workflow differs from a modern consolidated engine display.
In your simulator
No released simulator product is listed for this aircraft in the developers reviewed. Announced products are excluded.
Manuals & resources
Find your next read
Choose a topic for a short introduction and a link to the original source. Simulator references identify the developer and edition they cover.
Simulator documentation
Controls and equipmentLearjet 25 Classic
The simulated STICK N/P function uses the autopilot for stall nose-down and overspeed nose-up commands; recovery leaves attitude hold engaged. The four-way yoke trim switch is disabled, with pitch and roll trim available through separate bindings.
GLJ25 Classic SE manual · pages 130–131, 168–169 and 200–201
Xtreme Prototypes · Read the source ↗Read the original documentation from the people who created it. Manuals open on their publisher’s website.
Simulator documentation
Learjet 25 Classic — simulator documentationXtreme Prototypes · GLJ25 Classic SE manual · pages 130–131, 168–169 and 200–201Built-in force-feedback profiles
Read the documentary basis, editable starting settings and remaining questions for the aircraft you fly. Each explanation refers to the exact profile revision shown.
Catalogue programme-20261011-v3 · 2 profile choices
Xtreme Prototypes GLJ Model 25 Classic SE
Xtreme Prototypes · Free and Pro · Revision 2 · Inherited starting point
MSFS 2020 · MSFS 2024
The classic CJ610-powered Learjet with manual primary controls.
Learjet 25 Classic
Free and Pro · Revision 1 · Partial review
MSFS 2020 · MSFS 2024 · X-Plane 12
The classic CJ610-powered Learjet with manual primary controls.
Learjet 25 Classic
The classic CJ610-powered Learjet with manual primary controls.
Aircraft and simulator scope
- Learjet 25 Classic · MSFS 2020 · Variant starting point
- Learjet 25 Classic · MSFS 2024 · Variant starting point
- Learjet 25 Classic · X-Plane 12 · Variant starting point
Universal named airframe/configuration; intended MSFS2020/MSFS2024/XP12 starting point, not add-on or edition acceptance. · Physical facts and prior documentary review are reused from their archived dated sources; new market availability is not inferred.
The simulator model and controls
The classic CJ610-powered Learjet with manual primary controls.
How this profile feels
Spring resistance builds with the selected airspeed response. A separate aerodynamic term adds speed-dependent control load.
Valid trim provides the configured pressure relief. Autopilot following is off.
Aircraft and configuration
Two CJ610 engines, retractable tricycle gear, hydraulic flaps/spoilers and the documented ground-reverse function.
Controls and equipment
The simulated STICK N/P function uses the autopilot for stall nose-down and overspeed nose-up commands; recovery leaves attitude hold engaged. The four-way yoke trim switch is disabled, with pitch and roll trim available through separate bindings.
About the values
Strengths are normalized hardware-feel settings. They set the effect balance; hand force depends on the device and its limits. The IAS reference is a tuning value.
What the documentation establishes
Learjet 25 Classic: Two CJ610 engines, retractable tricycle gear, hydraulic flaps/spoilers and the documented ground-reverse function.
Documentary review and sources
These decisions describe the documentary basis and remaining gaps for this revision. Aircraft documentation and a starting setting describe different kinds of evidence.
Aircraft and variant
ReviewedThe classic CJ610-powered Learjet with manual primary controls.
Flight controls
InheritedThe classic CJ610-powered Learjet with manual primary controls.
Trim
InheritedThe simulated STICK N/P function uses the autopilot for stall nose-down and overspeed nose-up commands; recovery leaves attitude hold engaged. Pitch authority 0.3 provides load relief and permitted centre movement; roll authority is 0.15.
Autopilot and stability
ReviewedAutopilot following is off; the configured spring and load retain the hardware feel.
Equipment
InheritedTwo CJ610 engines, retractable tricycle gear, hydraulic flaps/spoilers and the documented ground-reverse function.
Speeds and limits
InheritedThe indicated-speed references set the profile response scale; they are separate from aircraft operating limits.
Simulator integration
ReviewedThe profile targets msfs2020, msfs2024, xplane12. Add-on-specific controls use only the supported references configured by this profile.
Force-feedback settings
InheritedThe settings define the profile’s effect balance. Device output limits affect physical hand force.
Starting settings and their rationale
These configured values are starting estimates. The explanations describe what each setting controls; physical validation appears separately below.
| Setting | Starting value | What it controls and why |
|---|---|---|
| Spring strength | Starting value0.74 | What it controls and whyPrimary controls: Manually powered. The baseline spring is 0.74. Its low-speed blend reaches baseline strength at 90 KIAS. |
| Master force gain | Starting value0.85 | What it controls and whyScales overall profile strength while preserving effect balance, subject to device and output limits. |
| Profile force gain | Starting value0.8 | What it controls and whyThe aerodynamic-load gain is 0.8 with an indicated-speed reference of 240 KIAS. This supplies speed-dependent loading alongside the spring. |
| Force tuning speed/reference | Starting value240 kt | What it controls and whySets the IAS reference for aerodynamic loading. It is an estimate, not published cruise TAS or a flight limit. |
| Spring response reference speed | Starting value90 kt | What it controls and whySets the IAS where the low-speed blend reaches baseline strength; high-speed stiffening also uses it. |
| Aileron force scale | Starting value0.72 | What it controls and whyRoll and pitch aerodynamic scales are 0.72 and 1, respectively. They set the aerodynamic axis balance. No custom spring-travel curve is enabled. |
| Elevator force scale | Starting value1.0 | What it controls and whyScales pitch aerodynamic loading; pitch spring travel and trim responses are separate settings. |
| Trim feel | Starting valueDisabled | What it controls and whyRetained for compatibility and group membership. Trim relief, rather than this flag, controls centre movement. |
| Trim relief | Starting valueEnabled | What it controls and whyAllows trim relief with supported control law and valid telemetry. Axis authorities set its amount. |
| Autopilot follow | Starting valueDisabled | What it controls and whyAutopilot following is off; the configured spring and load retain the hardware feel. |
| Autopilot neutral hold | Starting valueDisabled | What it controls and whyPermits centering hold during a supported AP state, separate from following a moving target. |
| Output force limit | Starting value0.55 | What it controls and whyCaps directed-force output. Native spring effects and device limits remain separate. |
All 44 starting settings and their rationale
The settings define the profile’s effect balance. Device output limits affect physical hand force.
| Setting | Starting value | What it controls and why |
|---|---|---|
| Spring strength | Starting value0.74 | What it controls and whyPrimary controls: Manually powered. The baseline spring is 0.74. Its low-speed blend reaches baseline strength at 90 KIAS. |
| Profile force gain | Starting value0.8 | What it controls and whyThe aerodynamic-load gain is 0.8 with an indicated-speed reference of 240 KIAS. This supplies speed-dependent loading alongside the spring. |
| Elevator force scale | Starting value1.0 | What it controls and whyScales pitch aerodynamic loading; pitch spring travel and trim responses are separate settings. |
| Aileron force scale | Starting value0.72 | What it controls and whyRoll and pitch aerodynamic scales are 0.72 and 1, respectively. They set the aerodynamic axis balance. No custom spring-travel curve is enabled. |
| Output force limit | Starting value0.55 | What it controls and whyCaps directed-force output. Native spring effects and device limits remain separate. |
Learjet 25 Classic: No simultaneous TrimFeel. This does not interpret the disabled four-way cockpit animation as working trim feedback or implement an AFCS maneuver button. Estimated pitch/roll trim authorities 0.3/0.15; exact add-on sign, travel, units and build-specific neutral remain unqualified. Rudder trim never substitutes for roll trim.
| Setting | Starting value | What it controls and why |
|---|---|---|
| Elevator Authority | Starting value0.3 | What it controls and whyThe simulated STICK N/P function uses the autopilot for stall nose-down and overspeed nose-up commands; recovery leaves attitude hold engaged. Pitch authority 0.3 provides load relief and permitted centre movement; roll authority is 0.15. |
| Aileron Authority | Starting value0.15 | What it controls and whyScales supported roll-trim relief and permitted centre movement. Zero removes roll response. |
Learjet 25 Classic: 240 KIAS is the retained estimated tuning reference. It is not published cruise TAS, VNE, a new flight limit or a measured force threshold. Source-specific operating quantities remain attached to their original configuration and conditions.
| Setting | Starting value | What it controls and why |
|---|---|---|
| Force tuning speed/reference | Starting value240 kt | What it controls and whySets the IAS reference for aerodynamic loading. It is an estimate, not published cruise TAS or a flight limit. |
Spoiler, shaker, nudger and puller force contracts remain unqualified. Jet propulsion excludes piston/propwash assumptions.
| Setting | Starting value | What it controls and why |
|---|---|---|
| Gain | Starting value0.35 | What it controls and whySpoiler, shaker, nudger and puller force contracts remain unqualified. Jet propulsion excludes piston/propwash assumptions. |
| Shaker Enabled | Starting valueDisabled | What it controls and whySpoiler, shaker, nudger and puller force contracts remain unqualified. Jet propulsion excludes piston/propwash assumptions. |
| Gain | Starting value0.06 | What it controls and whySpoiler, shaker, nudger and puller force contracts remain unqualified. Jet propulsion excludes piston/propwash assumptions. |
Exact configured values with software explanations. Force magnitudes remain editable estimates; disabled features retain inactive values.
| Setting | Starting value | What it controls and why |
|---|---|---|
| Spring deadband | Starting value0.04 | What it controls and whySets travel around the centre before the baseline spring resists. Smaller values engage it sooner. |
| Master force gain | Starting value0.85 | What it controls and whyScales overall profile strength while preserving effect balance, subject to device and output limits. |
| QBlend Enabled | Starting valueEnabled | What it controls and whyAllows baseline spring strength to rise with indicated airspeed where the control law permits it. |
| QSpring Minimum Factor | Starting value0.55 | What it controls and whySets low-speed spring strength as a fraction of baseline when blending is enabled. One keeps full strength. |
| QSpring Start Knots | Starting value30 kt | What it controls and whySets the IAS where the low-speed spring blend starts rising. This is a feel threshold, not a flight limit. |
| Spring response reference speed | Starting value90 kt | What it controls and whySets the IAS where the low-speed blend reaches baseline strength; high-speed stiffening also uses it. |
| Airspeed spring stiffening gain | Starting value0.15 | What it controls and whyThe high-speed spring-stiffening gain is 0.15. It strengthens the permitted spring response above 90 KIAS, with the squared-speed ratio capped at 5. |
| Airspeed spring stiffening limit | Starting value5 | What it controls and whyLimits the squared airspeed ratio used for high-speed spring stiffening; it is not a device-force cap. |
| Trim feel | Starting valueDisabled | What it controls and whyRetained for compatibility and group membership. Trim relief, rather than this flag, controls centre movement. |
| Trim relief | Starting valueEnabled | What it controls and whyAllows trim relief with supported control law and valid telemetry. Axis authorities set its amount. |
| Force Trim Enabled | Starting valueDisabled | What it controls and whyEnables local force trim, separate from aircraft-owned trim and add-on integration qualification. |
| GLoad Enabled | Starting valueEnabled | What it controls and whyAllows load-factor changes to modify permitted spring laws. Passive fly-by-wire feel can suppress it. |
| Rate Damping Enabled | Starting valueEnabled | What it controls and whyEnables rate damping with the configured coefficients and control law. |
| Autopilot follow | Starting valueDisabled | What it controls and whyAutopilot following is off; the configured spring and load retain the hardware feel. |
| Autopilot follow authority | Starting value0.1 | What it controls and whySets admitted AP-follow gain, not a percentage of travel. Runtime ownership and input limits still apply. |
| Autopilot neutral hold | Starting valueDisabled | What it controls and whyPermits centering hold during a supported AP state, separate from following a moving target. |
| Autopilot neutral hold strength | Starting value0.6 | What it controls and whySets admitted AP neutral-hold strength; inactive while neutral hold is disabled. |
| Enabled | Starting valueEnabled | What it controls and whyEnables aerodynamic cues; each still needs nonzero strength and its simulator conditions. |
| Gain | Starting value0 | What it controls and whySets high-Mach buffet strength; onset and full-strength thresholds are separate. |
| Gain | Starting value0 | What it controls and whySets flap buffet at the configured position and speed gates. Flap movement texture is separate. |
| Maximum flap index | Starting value2 | What it controls and whySets the final flap index for detent normalization. UP plus three detents uses maximum index3. |
| Minimum flap index | Starting value2 | What it controls and whySets the first flap detent that admits buffet; this is a handle index, not degrees. |
| Gain | Starting value0 | What it controls and whySets gear aerodynamic buffet; movement and ground-contact cues are separate. |
| Stick shaker amplitude | Starting value0.5 | What it controls and whySets triggered shaker strength; inactive while the shaker feature is disabled. |
| Enabled | Starting valueEnabled | What it controls and whyEnables ground effects; each still needs its own strength and contact or motion telemetry. |
| Gain | Starting value0.4 | What it controls and whySets rolling texture strength, modified by speed, surface and undercarriage configuration. |
| Gain | Starting value0.25 | What it controls and whySets gear-bump texture during ground motion, separate from touchdown impact. |
| Gain | Starting value0.65 | What it controls and whySets landing-impact strength; landing telemetry and response shape determine the pulse. |
| Gain | Starting value0.1 | What it controls and whySets reverse-thrust vibration with valid reverser and engine conditions. Zero removes the cue. |
| Enabled | Starting valueEnabled | What it controls and whyEnables engine cues with nonzero settings and valid running-engine telemetry. |
| Enabled | Starting valueEnabled | What it controls and whyEnables accessory cues with configured strengths and observed accessory movement. |
| Gain | Starting value0.12 | What it controls and whySets texture from observed flap movement; a command without movement does not establish the cue. |
| Gain | Starting value0.12 | What it controls and whySets texture from observed gear movement, separate from aerodynamic and touchdown effects. |
Limits and open questions
- Learjet 25 Classic is a universal starting point; exact add-on matching, edition operation and physical hand-force calibration remain unqualified.
- Autopilot movement and unknown custom trim, failure or force-input signals are disabled. Confirm the selected equipment fit and trim direction for the implementation in use.
- Force magnitudes and speed tuning are editable inherited estimates. Owner physical and installed-aircraft acceptance remain pending.
Physical validation
No physical force validation is recorded in this public catalogue for this revision. Documentary review and software checks do not establish how a particular device feels.
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