FlightGear Newsletter February 2018: Difference between revisions

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FlightGear Newsletter February 2018 (view source)

Revision as of 12:28, 3 February 2018

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===== [[Cessna 182S]] =====
[[File:C182STakeOff.jpg|thumb|right|500px|New custom registration Livery]]
Heiko Schulz recently published an update of the [[Cessna 182S]], delivering a huge step forward in realism for that plane to the public, thanks to the hard team work of Heiko, Gilberto Agostinho and Benedikt Hallinger.
 
'''This was achieved so far:'''
*'''Aircraft performance''' matches the POH closely now in virtually all altitudes (<5% difference!).
*'''Davtron clock''' now shows the time and temperatures and also features a stopwach. The Flight timer ("FT") is reset by pressing the control-button longer than 3 secs; the elapsed-time ("ET") is started by the first press, stopped by the second and reset by the third. To cycle temperatures or battery voltage, press the red knob (voltage is signified by "E" after the value).
*'''Checklists''' allow you to follow trough the POH operations.
*New '''fuel system''' simulates not only the selection of the tank, but also crossfeed in unbalanced flights and gravity influences.
*'''Priming''' is simulated realistically if you enable "complex engine procedures" in the aircraft options. For a successfull engine start, follow the checklist. In colder weather, let the fuel flow a little longer, about 1-2 secs. If it is too cold, use the '''preheater''' (-> Ground Equipment) to preheat the engine.<br/>If the engine is "warm" (~75°F), you can omit priming altogether (as long as the remaining fuel in the manifold did not disperse; if it is dry, such like before the first start, inject some small fuel ammount by priming procedure).
* Also be sure in your preflight check to remove '''water contamination''' not only in the wing tanks, but also the fuel strainer (right front) and fuel selector (below aircraft)
* '''In Winter''' (<20°F/-6°C), you can apply the '''winterization kit''' to keep the oil sufficient warm. When the oil is too cold, the engine will cough and not develop full power.
*'''Oil usage''' is now also implemented. Be sure to check the oil level in preflight (cap on left nose top) and also conduct an oil change every 50 hours or so, otherwise the oil gets worn out and consumption rates will rise significantly.
*'''Start-up states''' are available now. You may either use all settings of the last session or choose one of "cold-and-dark" / "ready for takeoff" / "cruise". The "Auto" option selects from the last three depending on the startup situation (parking position->cold-and-dark; runway->RfT, in-air->cruise). For more details see the section below.
*The '''GMA 340 Audio panel''' is now functional and allows fine tuning of radios, NAV/DME/ADF idents and marker beacons.
*The '''radio stack''' received many bugfixes and small additions and should be fully functional now; for example the DME now works correctly with the preset frequency.
* The '''Transponder default VFR-Code''' (which is activated by pressing the VFR-Button) can now be customized by setting the <code>/instrumentation/transponder/factory-vfr-code</code> property.
* The '''electrical system''' was enhanced and now all circuit breakers are working. The electrically driven instruments also behave correctly to loss of power now.
*A '''new livery with custom registration''' is available.
*Clickspots have been improved
*On-screen help texts are now available for nearly all cockpit elements
 
 
'''State support:'''
[[File:C182-aircraft-options.png|thumb|right|New aircraft options dialog]]
Basicly, the Cessna saves all switches and important states between sessions now. In addition, it supports different startup states. You can control these states from the ingame aircraft options dialog. Flightgear initializes to the selected state from the last session automatically at startup unless overridden through the launcher using the <code>--state</code> parameter.<br/>
The default state is <code>auto</code> which means that the state selection depends on the configured startup position: When you select a runway position, the plane is ready-for-takeoff; selecting a parking position yields a parked plane and configuring an in-air position makes the C182S cruise. If you choose "saved" state, the plane always initializes like you have left it behind the last time.
 
You can of course override the currently persisted state setting through the launcher. This makes Flightgear initialize the selected state just for this session (the stored ingame setting is not changed). This makes it very easy to set up Flightgear for example to practice approaches. The state initializing reacts intelligently and adjusts saved state for the given startup situation (remove tiedowns when in-air for example).
 
These states are available trough the launcher:
* <code>--state=auto</code> Automatically set state depending on position (in-air=cruise; parking=parking any other=take-off).
* <code>--state=parking</code> Cold-And-Dark as well as secured to ground; before preflight checks.
* <code>--state=take-off</code> Ready for Takeoff with engine idling.
* <code>--state=cruise</code> Engine on and set to cruise (use with in-air-start)
* <code>--state=approach</code> Engine on and set to cruise (use with in-air-start)
With an in-air-start, airspeed gets initialized to 100kts unless otherwise specified >0 (e.g. <code>--vc=5</code> or selection in launcher).
 
Examples:
*'''Approach to EDDM:''' <code>fgfs --aircraft=c182s --state=auto --airport=EDDM --offset-distance=6 --altitude=3500 --timeofday=noon</code>
*'''Power-off Approach to EDDM:''' <code>fgfs --aircraft=c182s --state=take-off --airport=EDDM --offset-distance=6 --altitude=3500 --timeofday=noon</code> (->engine idles; adding <code>--state=parking</code> gives the funny experience of gliding with all <s>hope</s> power lost and blocked pitot)
 
 
'''Complex engine procedures:'''
[[File:C182-fuelports.png|thumb|right|Fuel selector and strainer quick drain valves clickspots]]
[[File:C182-oil-cap.png|thumb|right|Oil cap location]]
If you activate the new ''Complex engine Procedures and failures'' option, the engine handling gets much more realistic. Especially the engine needs priming before it can start (see above article, ingame checklists and/or POH for reference). If you prime too much, you can flood the engine (put mixture to idle cutoff and throttle to 1/2 to full, then crank. When engine fires, set mixture to full rich and throttle to idle). If it is too cold, you need to preheat the engine. If the engine oil gets too cold, then the engine cannot develop full power and may also cough, so be sure to apply the winter kit if temperature is permanently below -6°C/20°F.
 
When you futher enable ''Allow Fuel Contamination'', the fuel system may be contaminated with water/sediments, so be sure to properly preflight the plane correctly: Inspect the wing tanks (bottom of tanks), the fuel selector valve (below plane) and the fuel strainer (right lower front near the cowl flap).
 
With ''Allow Oil Management'' enabled, the engine will consume Oil. Consumption rate depends mainly on engine RPM but also on the oil age. You can refill and change the oil using the oil management dialog which you can access by clicking on the oil filler cap (located on left top nose).
If the oil level gets too low, the oil temperature will increase to the point where the lubrication film will rip, bringing the engine to a sudden halt.
 
 
<gallery mode="packed">
C182SDavtron803.jpg|New Davtron 803
C182SWinterKit.jpg|The new Winterkit and Preheater
</gallery>
 
 


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Hbeni
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