Cessna 182S

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Revision as of 03:03, 10 January 2007 by John Denker (talk | contribs)
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Development status/Issues/Todo

c182-2dpanel Cessna 182 (2D panel)

Outside:

  • cockpit instruments can be seen through the aileron
  • ailerons on the right side are not animated
  • no cockpit light at night visible
  • no pilot and co pilot visible
  • wings are not textured
  • aircraft has no shadow
  • no aircraft light available

3d Cockpit:

  • cockpit instruments do light at night, but the cockpit itself stays dark, which means (among other things) the flap handle can't be seen
  • cockpit instruments can be seen through the rudder controls, they overlay the rudder controls
  • can't hear sound when pressing the switches and levers in the cockpit
  • no elevator trim control available
  • no rudder control pedals available
  • cockpit instruments look flat, they don't have a 3d look
  • cockit is not textured
  • pilot seat is not available
  • no pilot or copilot present


General:

  • engine sound in cockpit does not differ from outside engine sound
  • In the model, the engine noise is the same at all speeds from 1500 RPM on up. (The pitch gets lower as the speed drops below 1500 RPM.) This has an impact on pilot technique; the pilot should be able to hear RPM changes, anywhere in the range.
  • aircraft is flipped when pressing the reset button
  • aircraft has the wrong elevation (approximately 20 meter above the runway) after pressing the reset key
  • The C182 model does not realistically capture the flap/power/trim interaction. In the model, extending the flaps seems to cause a nose-down pitching moment, which is the wrong direction. And the power-dependence of the effect is not realistically modelled. In a real C182 / C172 / C152 / C150, the flap/trim interaction can be described as follows:
    • Changing the flap setting has little effect when the engine is at idle.
    • Changing the power setting has little effect when the flaps are in the retracted position.
    • However, there is a multiplicative effect: Adding power causes a nose-up pitching moment when flaps are in an extended position. Or, to say the same thing, extending the flaps causes a nose-up pitching moment. The effect is in proportion to the amount of power being developed *times* the amount of flap deflection.
  • The model seems never to consume any fuel. A dump of the property list indicates that engines/engine/fuel-flow-gph takes on reasonable values and tracks the throttle setting, while engines/engine/fuel-flow_pph remained stuck at zero. This is a particularly bad disconnect, since apparently the latter is what gets integrated to calculate engines/engine/fuel-consumed-lbs.
  • No "flags" on the instruments. The GS needle goes to mid-scale if there is no valid signal. That'll kill you for sure. I'm told that the hi-res instruments implement flags, but the lo-res ones don't, and the c182 model is using the lo-res versions.
  • Modelling a failure via the "heading indicator" option on the "instrument failures" popup has no discernible effect on the HSI. I dumped the property list and observed that the "serviceable" flag on the heading indicator was false, in accordance with the desired failure ... but somehow the backend routines are not respecting this setting. FWIW replacing the HSI in the panel with a plain old DG allows proper modelling of the failure.

Desirable creeping features:

  • Retractible landing gear. This would increase the value of the model for "transition training" for pilots transitioning into complex aircraft.


Non-Bugs

  • horizon instrument is in wrong position after doing some wild flying maneuvers. This is a realistic model of a tumbled gyro.
  • cockpit window has no windscreen wipers. This is realistic.
  • hud is not available. This is realistic.

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