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F-22 (Black VR 1.05)

4,380 cosman  3 months ago
Auto Credit Based on GuyFolk's F-22 'Raptor' update 1.11

Introducing the F22 Raptor. This is based off the F22 by GuyFolk although I have heavily reworked the physics of the flight model to be able to achieve what the real Raptor can accomplish and what its airframe and thrust vectoring should theoretically be capable of.

I've worked hard to cut the parts down so it runs smooth on mobile and Quest 2. Feel free to peruse the variable setters and funky trees code to understand how I have coded the engines, control surfaces and thrust vectoring nozzles.

My Goal with this release was not accurate replication but rather a low part, ergonomic, VR friendly and functional cockpit with good forward visibility and an aircraft which does not compromise on capabilities or flight physics. Weapons also reflect this ethos as the traditional armament is x2 sidewinders and x6 AMRAAMs. AMRAAMs have been given multi role capabilities.

Notable achievements with this model include:

1) Fly by wire
Multiple iterations over the previous versions for general overall improvement in stability and maneouverability
- control surface deflection should multiply by the inverse of IAS squared for consistent forces
- thrust vectoring should by multiplied by the inverse of the output thrust
- max deflection allowed in extreme conditions (eg extreme low speed and vertically up)
- absent or reversed control surfaces in certain conditions (extreme AoA, flying in reverse)
- differential thrust available for stability
- differential thrust for extreme yaw maneouvers (Activation Switch 4)
- AoA Limiter (Activation Switch 1)
- G limiter
- Controls sensitvity (VTOL lever). default is medium, can be increased or decreased

2) Landing Auto Throttle
This is enabled by default. Just keep the airbrake on approach and use the stick to adjust your glideslope. a PID controller will keep the Engines active to maintain a ~130knot approach. Flare before touch down to a Pitch Angle of ~12 degrees and plane will slowly kiss the runway.

3) Ground stability and manoeuvrability
Use Roll and/or Yaw controls whilst on the ground. Tire slip angles are calculated to feedback to steering system for smooth steering. at higher speed whilst on the ground, control surfaces automated to provide roll stability to resist wing strikes.

4) Variable setters for Pitch, Roll, Yaw, and Throttle.
This allows adjusting exponential gains for each input axis. Sensitivity slider (VTOL) controls the sensitivity of the flight controls.

5) Throttle Thumbstick Disable
Throttle control from keyboard or thumbstick is disabled by default to allow for smooth independent rudder control in VR without inadvertent engine shutoff or afterburner activation. It also allows simultaneous Throttle and air brake application for tight min radius turns.

6) Radar/Nav System
This has been incorporated into the compass for locating targets and destinations. Destinations with runways also denote the orientation of the runway. you can cycle between desination waypoints by clicking on the compass in the cockpit.

7) HUD
This is purposely kept simple to be relevant in VR. A velocity vector and virtual horizons would need to be projected at a distance of infinity which is not possible (if anyone knows please chime in). So for readability and not obscuring targets, I've left the in game Gunsight/Target Lead and added only absolutely necessary items:
IAS (knots)
Alt AGL (ft) numerical + graphical elements to aid landing
Vertical Velocity (ft/s)
AoA (visual bars that turn amber and red when AoA>35 and AoA>90)
AoS (turn indicator at bottom of HUD)
controls input indicator

Update 1.05
see all changes up to 1.04
- no longer using corrected YawRate or skidded turn identifier from previous version as they introduced some dynamic instability
- corrected RollRate is still used however
- improved takeoff and landing pitch control (via vertical stabiliser functions)
- added cockpit buttons for weapon selection and targetting (feature request)
- added refuelling probe - note auto throttle will maintain tanker speed when probe deployed (feature request)
- single piece canopy (reduced parts count and sun flare now visible from within cockpit)

Spotlights

General Characteristics

  • Predecessor F-22 'Raptor' update 1.11
  • Created On Windows
  • Wingspan 45.1ft (13.7m)
  • Length 139.6ft (42.6m)
  • Height 34.8ft (10.6m)
  • Empty Weight 42,329lbs (19,200kg)
  • Loaded Weight 57,049lbs (25,877kg)

Performance

  • Power/Weight Ratio 3.284
  • Wing Loading 68.9lbs/ft2 (336.2kg/m2)
  • Wing Area 828.5ft2 (77.0m2)
  • Drag Points 2285

Parts

  • Number of Parts 463
  • Control Surfaces 4
  • Performance Cost 1,890