Start here
A few places to begin, from the aircraft’s story to the people who fly it.
Aircraft and simulator background
EagleLabs' Eagle 315 is a retro-style general-aviation design created for X-Plane. Its published specifications list two 160 hp engines, with counter-rotating constant-speed propellers and retractable landing gear.
EagleLabs Eagle 315 HP Twin Prototype
X-Plane.org authorized store · Read more ↗A simulator twin's systems
The product lists a custom S-TEC autopilot and 24 independently simulated fuses with failure behaviour. Black and white cockpit styles provide alternative presentations of the same design. The manual is supplied with the purchase.
EagleLabs Eagle 315 HP Twin Prototype
X-Plane.org authorized store · Read more ↗The earlier and later Eagle designs
The author's description identifies counter-rotating 160 hp engines and constant-speed propellers with retractable landing gear. The improved 2024 store model is a development of the free 2019 design; the versions have separate histories.
EagleLabs Eagle 315 HP Twin Prototype
EagleLabs · Read more ↗The v2.1 flying-control revision
The June 6, 2024 v2.1 notes describe differential ailerons to reduce adverse yaw and wingtip vortex generators intended to delay aileron stall. Elevator effectiveness, trim precision, centre of gravity and low-speed stability were also revised.
EagleLabs Eagle 315 HP Twin Prototype
X-Plane.org authorized store · Read more ↗Meet EagleLabs Eagle 315 HP Twin Prototype
EagleLabs' Eagle 315 is a retro-style general-aviation design created for X-Plane. Its published specifications list two 160 hp engines, with counter-rotating constant-speed propellers and retractable landing gear.
The paid product develops an earlier freeware design. Its custom S-TEC autopilot, 24 separately simulated fuses and failure options accompany alternative black and white cockpit styles.
EagleLabs Eagle 315 HP Twin Prototype
EagleLabs → · Explore the family →
EagleLabs Eagle 315 HP Twin Prototype
X-Plane.org authorized store · Eagle 315 HP Twin Prototype exact product classification ↗Aircraft type designators
No type designator selected for this reference.
History & design
A virtual twin built for practice
EagleLabs presents the Eagle 315 as a retro-style simulator design built around visibility, readable instruments and VFR/IFR training. Its two 160 hp engines, custom avionics and simulated fuse panel are part of that virtual prototype, rather than a production aircraft’s certification record.
X-Plane.org authorized store · Eagle 315 HP Twin Prototype exact product classification ↗Developer product introduction
A control-focused revision
Version 2.1, released on 6 June 2024, revised low-speed stability, elevator authority, trim precision and centre of gravity. Differential ailerons and a modified wingtip/aileron arrangement were included to improve roll response as the wing approached the stall. These are documented changes to the simulation.
X-Plane.org authorized store · Eagle 315 HP Twin Prototype exact product classification ↗Version 2.1 change history
Systems & details
A simulator twin's systems
The product lists a custom S-TEC autopilot and 24 independently simulated fuses with failure behaviour. Black and white cockpit styles provide alternative presentations of the same design. The manual is supplied with the purchase.
The earlier and later Eagle designs
The author's description identifies counter-rotating 160 hp engines and constant-speed propellers with retractable landing gear. The improved 2024 store model is a development of the free 2019 design; the versions have separate histories.
The v2.1 flying-control revision
The June 6, 2024 v2.1 notes describe differential ailerons to reduce adverse yaw and wingtip vortex generators intended to delay aileron stall. Elevator effectiveness, trim precision, centre of gravity and low-speed stability were also revised.
In your simulator
Systems, equipment and documentation for each developer’s aircraft.
X-Plane 11 · X-Plane 12EagleLabs Eagle 315 HP Twin Prototype
EagleLabs · Released
EagleLabs Eagle 315 HP Twin Prototype
EagleLabs · Released
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.
Developer documentation
Eagle 315 HP Twin Prototype exact product classificationEagleLabs Eagle 315 HP Twin Prototype
Features and v2.1 requirements
X-Plane.org authorized store · Read the source ↗Eagle315 author configuration and versionsEagleLabs Eagle 315 HP Twin Prototype
Author specifications and storev2.1 changes
EagleLabs · Read the source ↗Read the original documentation from the people who created it. Manuals open on their publisher’s website.
Developer documentation
Eagle 315 HP Twin Prototype exact product classificationX-Plane.org authorized store · Features and v2.1 requirements Eagle315 author configuration and versionsEagleLabs · Author specifications and storev2.1 changesBuilt-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 · 1 profile choice
EagleLabs Eagle 315 HP Twin Prototype
EagleLabs · Free and Pro · Revision 2 · Inherited starting point
X-Plane 12
A retro-style simulator twin with counter-rotating engines and custom electrical failures.
EagleLabs Eagle 315 HP Twin Prototype
A retro-style simulator twin with counter-rotating engines and custom electrical failures.
Aircraft and simulator scope
- EagleLabs Eagle 315 HP Twin Prototype · EagleLabs · X-Plane 12 · Add-on starting point
The simulator model and controls
EagleLabs Eagle 315 HP Twin Prototype is the selected EagleLabs configuration.
How this profile feels
Spring resistance builds with the selected airspeed response. A separate aerodynamic term adds speed-dependent control load.
Pitch-trim relief is off. Autopilot following is off.
Aircraft and configuration
EagleLabs' Eagle 315 is a retro-style general-aviation design created for X-Plane. Its published specifications list two 160 hp engines, with counter-rotating constant-speed propellers and retractable landing gear.
A simulator twin's systems
The product lists a custom S-TEC autopilot and 24 independently simulated fuses with failure behaviour. Black and white cockpit styles provide alternative presentations of the same design. The manual is supplied with the purchase.
The earlier and later Eagle designs
The author's description identifies counter-rotating 160 hp engines and constant-speed propellers with retractable landing gear. The improved 2024 store model is a development of the free 2019 design; the versions have separate histories.
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.
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
InheritedEagleLabs Eagle 315 HP Twin Prototype is the selected EagleLabs configuration.
Flight controls
InheritedA retro-style simulator twin with counter-rotating engines and custom electrical failures.
Trim
InheritedThe profile uses the trim behaviour configured below. Pitch relief is off, with stored authority 0; roll authority is 0.
Autopilot and stability
InheritedAutopilot following is off; the configured spring and load retain the hardware feel.
Equipment
InheritedEagleLabs' Eagle 315 is a retro-style general-aviation design created for X-Plane. Its published specifications list two 160 hp engines, with counter-rotating constant-speed propellers and retractable landing gear.
Speeds and limits
InheritedThe indicated-speed references set the profile response scale; they are separate from aircraft operating limits.
Simulator integration
InheritedThe profile targets 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 whyThe product lists a custom S-TEC autopilot and 24 independently simulated fuses with failure behaviour. The baseline spring is 0.74. Its low-speed blend reaches baseline strength at 65 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 145 KIAS. This supplies speed-dependent loading alongside the spring. |
| Force tuning speed/reference | Starting value145 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 value65 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 | 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 valueDisabled | 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 whyThe product lists a custom S-TEC autopilot and 24 independently simulated fuses with failure behaviour. The baseline spring is 0.74. Its low-speed blend reaches baseline strength at 65 KIAS. |
| Spring deadband | Starting value0.04 | What it controls and whySets travel around the centre before the baseline spring resists. Smaller values engage it sooner. |
| Profile force gain | Starting value0.8 | What it controls and whyThe aerodynamic-load gain is 0.8 with an indicated-speed reference of 145 KIAS. This supplies speed-dependent loading alongside the spring. |
| 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 value8 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 value65 kt | What it controls and whySets the IAS where the low-speed blend reaches baseline strength; high-speed stiffening also uses it. |
| Force tuning speed/reference | Starting value145 kt | What it controls and whySets the IAS reference for aerodynamic loading. It is an estimate, not published cruise TAS or a flight limit. |
| 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 65 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. |
| 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 | What it controls and whyScales pitch aerodynamic loading; pitch spring travel and trim responses are separate settings. |
| Output force limit | Starting value0.55 | What it controls and whyCaps directed-force output. Native spring effects and device limits remain separate. |
| 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 valueDisabled | What it controls and whyAllows trim relief with supported control law and valid telemetry. Axis authorities set its amount. |
| Elevator Authority | Starting value0 | What it controls and whyThe profile uses the trim behaviour configured below. Pitch relief is off, with stored authority 0; roll authority is 0. |
| Aileron Authority | Starting value0 | What it controls and whyScales supported roll-trim relief and permitted centre movement. Zero removes roll response. |
| 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 value0.35 | What it controls and whySets stall-buffet strength. Zero removes the cue without changing simulator stalls or warnings. |
| 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 value3 | 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. |
| Shaker Enabled | Starting valueDisabled | What it controls and whyPermits shaker at supported warning conditions; the switch does not establish aircraft equipment. |
| 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 | 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. |
| Gain | Starting value0.12 | What it controls and whySets estimated engine vibration using configured telemetry and response, not measured cockpit vibration. |
| 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 value0.025 | What it controls and whySets texture from observed gear movement, separate from aerodynamic and touchdown effects. |
Limits and open questions
- Manual flight controls with conservative IAS-dependent loading; no measured breakout force or travel ratio is available. A conventional GA feel is an engineering interpretation of this fictional design, not a real control-system claim.
- No public calibrated trim-to-inceptor relationship was established. Automatic trim-neutral movement is disabled.
- No calibrated AP servo target is published. AP-follow and neutral hold remain disabled; mode indicators are not servo demand.
- Read-only motion and accessory telemetry. No guessed custom servo outputs, input compensation or hardware writes outside the production Armed force path. Installed identity remains unobserved. The free2019design is not claimed to have all storev2.1systems.
- 145 KIAS is an estimated control-feel reference, not cruise TAS, V-speeds or an operating limit.
- Spring 0.74, lateral scale 0.7, trim relief 0/0; editable estimates, not measured hand forces.
- Physical and installed-aircraft checks are deferred. Save this profile as the aircraft default if telemetry omits its developer or configuration.
- Only actual accessory-position changes drive movement textures. No pressure-dependent failures, guessed servo outputs or input compensation.
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.
Discuss this aircraft (0)
Questions, observations and useful sources from the community.
No published discussions yet. Bring a question or share a useful source.
Open aircraft discussions →Content expanded · What’s new
Something missing or a source that needs attention?
Suggest a correction ↗