Start here
A few places to begin, from the aircraft’s story to the people who fly it.
Aircraft and configuration
The HpH 304S Shark configuration represented here is an unpowered 18-metre sailplane. It has a retractable main wheel, water ballast, spoilers and flaps with both negative and positive settings. STMA offers metric and imperial GPS and variometer displays.
HpH 304S Shark Unpowered
STMA · Read more ↗Meet HpH 304S Shark Unpowered
The HpH 304S Shark configuration represented here is an unpowered 18-metre sailplane. It has a retractable main wheel, water ballast, spoilers and flaps with both negative and positive settings. STMA offers metric and imperial GPS and variometer displays.
History & design
From the Glasflugel 304 to the Shark
HpH acquired the production technology and documentation for the Glasflugel 304 in 1997. Its updated 304CZ was followed by the 304C Wasp, a Standard Class version. The company describes the later Shark family as a new design programme drawing on that accumulated manufacturing experience.
The 304 name therefore covers a lineage, not one interchangeable glider. The selected simulator aircraft is the unpowered 18-metre 304S Shark; engine-equipped members of the wider family should not supply its propulsion assumptions.
HpH · Company history ↗HpH company history; unpowered model identity from the linked simulator product.
Systems & details
Flaps, ballast and energy management
STMA describes an X-Plane 12 model developed from HpH polar data. Negative flap settings, cockpit ballast controls and separate variometer and speed-to-fly modes make configuration part of the soaring task. The MacCready setting changes the instrument's speed guidance; it does not add engine power to this unpowered version.
In your simulator
No released simulator product is listed for this aircraft in the developers reviewed. Announced products are excluded.
Manuals & resources
Read the original documentation from the people who created it. Manuals open on their publisher’s website.
Simulator documentation
HpH 304S Shark Unpowered — simulator documentationSTMA · HpH 304S Shark Unpowered product descriptionAircraft documentation
Company historyHpH · Manufacturer account of its own acquisition, production and subsequent design programme.Built-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
STMA HpH 304S Shark
STMA · Free and Pro · Revision 2 · Inherited starting point
X-Plane 12
The unpowered 18-metre 304S Shark sailplane.
HpH 304S Shark Unpowered
Free and Pro · Revision 1 · Partial review
MSFS 2020 · MSFS 2024 · X-Plane 12
The unpowered 18-metre 304S Shark sailplane.
STMA HpH 304S Shark
The unpowered 18-metre 304S Shark sailplane.
Aircraft and simulator scope
- STMA HpH 304S Shark · STMA · X-Plane 12 · Add-on starting point
The simulator model and controls
STMA HpH 304S Shark is the selected STMA 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
The HpH 304S Shark configuration represented here is an unpowered 18-metre sailplane. It has a retractable main wheel, water ballast, spoilers and flaps with both negative and positive settings. STMA offers metric and imperial GPS and variometer displays.
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
InheritedSTMA HpH 304S Shark is the selected STMA configuration.
Flight controls
InheritedThe unpowered 18-metre 304S Shark sailplane.
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
InheritedThe HpH 304S Shark configuration represented here is an unpowered 18-metre sailplane. It has a retractable main wheel, water ballast, spoilers and flaps with both negative and positive settings. STMA offers metric and imperial GPS and variometer displays.
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 whyThis profile uses reversible-control loading for HpH 304S Shark Unpowered. The baseline spring is 0.74. Its low-speed blend reaches baseline strength at 42.5 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 85 KIAS. This supplies speed-dependent loading alongside the spring. |
| Force tuning speed/reference | Starting value85 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 value42.5 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 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 whyThis profile uses reversible-control loading for HpH 304S Shark Unpowered. The baseline spring is 0.74. Its low-speed blend reaches baseline strength at 42.5 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 85 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 value42.5 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 value85 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 42.5 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 value1.0 | 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 valueDisabled | What it controls and whyEnables engine cues with nonzero settings and valid running-engine telemetry. |
| Gain | Starting value0 | 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 | What it controls and whySets texture from observed gear movement, separate from aerodynamic and touchdown effects. |
Limits and open questions
- Manual 18m sailplane controls; no turbine or piston effects.
- Exact trim linkage not established in add-on listing; relief off.
- No calibrated autopilot servo or inceptor-demand output established. AP follow and neutral hold are disabled.
- 85 KIAS is an estimated tuning reference, not a certified operating limit or cruise TAS. Native flap normalization may omit negative travel; texture only when actual movement is reported.
- Native read-only aircraft telemetry only. No custom interface names, units or freshness contract invented; switches and animated controls are not servo demands.
- Spring 0.74, lateral scale 0.7, pitch/roll relief 0/0; editable estimates. No measured hand-force calibration, unsupported failure loads, surface-follow or body-rate torque.
- Installed-aircraft and physical checks are deferred. If telemetry omits the developer or configuration, select this profile and save it as the aircraft default.
- Only actual accessory-position changes drive movement textures. No release or installed-product acceptance is inferred.
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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