Difference between revisions of "Cessna 337G Skymaster"

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{{infobox Aircraft
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{{:{{PAGENAME}}/info}}
|image = Cessna337_01.png
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|name = Cessna 337G Skymaster
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|type = Piston, civilian aircraft
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|fdm = JSBsim
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|status-fdm = 3
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|status-systems = 2
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|status-cockpit = 5
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|status-model = 5
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|authors = Fernando Espinosa, Pavel Cueto
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|download = http://www.vivefg.org/index.php?option=com_content&view=article&id=48:cessna-337-skymaster&catid=35:hangar&Itemid=40
+
}}
+
 
+
 
The '''Cessna 337''' is a twin-engine [[aircraft]] built in a push-pull configuration. Instead of the engines being mounted on the wings, one is mounted on the nose and the other at the rear of the pod-style fuselage. The stabilizers are mounted on booms that extend from the wings. The Skymaster has a retractable undercarriage that gives it that little bit of extra speed.
 
The '''Cessna 337''' is a twin-engine [[aircraft]] built in a push-pull configuration. Instead of the engines being mounted on the wings, one is mounted on the nose and the other at the rear of the pod-style fuselage. The stabilizers are mounted on booms that extend from the wings. The Skymaster has a retractable undercarriage that gives it that little bit of extra speed.
  
Line 19: Line 7:
  
 
=== Aircraft keys ===
 
=== Aircraft keys ===
 +
{| class="keytable"
 +
! Key                                  !! Function
 +
|-
 +
| {{key press|d}}                      || Open/close cockpit door
 +
|-
 +
| {{key press|c}}                      || Open/close front cowl flaps
 +
|-
 +
| {{key press|C}}                      || Open/close rear cowl flaps
 +
|-
 +
| {{key press|m}}/{{key press|Shift|M}} || Adjust fuel mixture
 +
|-
 +
| {{key press|n}}/{{key press|Shift|N}} || Adjust speed governor (propeller pitch)
 +
|}
  
* '''d''' - Open/close cockpit door
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=== Limits ===
* '''c''' - Open/close front cowl flaps
+
 
* '''C''' - Open/close rear cowl flaps
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* '''V<sub>NE</sub>:''' 198 KIAS ''(Never exceed speed)''
* '''m/M''' - Adjust fuel mixture
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* '''V<sub>NO</sub>:''' 167 KIAS ''(Max. speed for normal operations)''
* '''n/N''' - adjust speed governor (propeller pitch)
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* '''V<sub>A</sub>:''' 140 KIAS ''(Design maneuvering speed)''
 +
* '''V<sub>FE</sub>:''' 109 KIAS ''(Max. full flap extended speed)''
 +
* '''V<sub>LE</sub>:''' 200 KIAS ''(Max. landing gear extended speed)''
 +
* '''V<sub>LO</sub>:''' 140 KIAS ''(Max. landing gear extend/retract speed)''
 +
* '''Stall''' speed, full flaps: 61 KIAS
 +
* '''Stall''' speed, zero flaps: 70 KIAS
 +
* '''Max. weight:''' 4630 lbs. ''(2100 kg)''
 +
* '''Service ceiling (two engines):''' 18,000 ft
 +
* '''Ground run for takeoff:''' 1,000 ft
 +
* '''Ground roll for landing''' 700 ft
 +
 
 +
== Normal procedures==
 +
[[File:Cessna337-details.png|thumb|250px|The model is pretty detailed, and users can select between 5 HQ liveries]]
 +
[[File:Cessna337-night.png|thumb|250px|Nice view of the Skymaster cockpit at night]]
  
 
=== Startup ===
 
=== Startup ===
Line 57: Line 71:
 
* Deploy flaps gradually under 110 KIAS
 
* Deploy flaps gradually under 110 KIAS
 
* Touchdown at 75/60 KIAS, depending on aircraft weight
 
* Touchdown at 75/60 KIAS, depending on aircraft weight
 
=== Aircraft limits ===
 
 
* VNE: 198 KIAS (Never exceed speed)
 
* VNO: 167 KIAS (Max. speed for normal operations)
 
* VA: 140 KIAS (Design maneuvering speed)
 
* VFE: 109 KIAS (Max. full flap extended speed)
 
* VLE: 200 KIAS (Max. landing gear extended speed)
 
* VLO: 140 KIAS (Max. landing gear extend/retract speed)
 
* Stall speed, full flaps: 61 KIAS
 
* Stall speed, zero flaps: 70 KIAS
 
* Max. weight: 4630 lbs. (2100 kg)
 
* Cervice ceiling (two engines): 18,000 ft
 
  
 
== Systems ==
 
== Systems ==
 +
[[File:Cessna337-avionics.png|thumb|250px|Detail of the avionics panel]]
  
The Cessna 337 still in development, but it has some suitable systems. Electrical, vacuum and fuel system are working, but they have no failure system modelled yet. Users can adjust the weight of each seat on the plane and fuel ammount. Almost all buttons, knobs and levers are functional and properly animated, and all instruments are labeled for a properly identification.
+
The Cessna 337 still in development, but it has some suitable systems. Electrical, vacuum and fuel system are working, but they have no failure system modelled yet. Users can adjust the weight of each seat on the plane and fuel amount. Almost all buttons, knobs and levers are functional and properly animated, and all instruments are labeled for a properly identification.
  
 
About knobs, use scroll mouse for gross adjustments, and left-central buttons for fine tunning. When setting radio frequencies, the mouse scroll will adjust integral numbers, and buttons will tune decimals. Try that method with instruments, cowl flap switches, trim levers, magnetos, etc.
 
About knobs, use scroll mouse for gross adjustments, and left-central buttons for fine tunning. When setting radio frequencies, the mouse scroll will adjust integral numbers, and buttons will tune decimals. Try that method with instruments, cowl flap switches, trim levers, magnetos, etc.
  
 
=== Avionics ===
 
=== Avionics ===
Our Skymaster release is provided with a working Bendix/King avionics pack, capable to full IFR night navigation:
+
 
 +
The Skymaster release is provided with a working Bendix/King avionics pack, capable of full IFR/night navigation:
 +
 
 
* 2 KX-155 COMM/NAV Radios, attached to a pair of KI-206 VOR locators
 
* 2 KX-155 COMM/NAV Radios, attached to a pair of KI-206 VOR locators
* KN-62A DME receiver (in development, attached to NAV1 only)
+
* KN-62A DME receiver with internal frequency hold and NAV1 remote operation
 
* KR-87 ADF receiver, attached to a KI-227 ADF locator
 
* KR-87 ADF receiver, attached to a KI-227 ADF locator
* KMA-24 Audio panel (not useful in FlightGear yet)
+
* KMA-24 Audio panel
* KT-76A Transponder (not useful in FlightGear yet)
+
* KT-76A Transponder, with radar sweep simulation
 
* KI-250 Radar altimeter, capable to mark decision height for low-visibility landings
 
* KI-250 Radar altimeter, capable to mark decision height for low-visibility landings
 +
* Hobbs Meter
 +
 +
{{Note|A full KMA24 audio panel implementation was added in January 2017. The knob on the right of the unit switches the speaker amplifier on and off and also controls the marker beacon receiver. To hear ATIS broadcasts, either switch the comm radio output using the COMM phone switch, or use the COMM speaker switch with the knob in any position other than off. To hear marker beacon idents, the knob must be in any other position than off and one of the MKR switches selected on the panel.}}
 +
 +
Radio stack instruments are modelled according to the Bendix King pilot guides. Refer to those guides for operating instructions. [http://www.bendixking.com/HWL/media/Pilot-Guides/006-18110-0000_5.pdf]
 +
 +
=== Autopilot ===
 +
 +
The [[Cessna 337G Skymaster/Navomatic 400A]] autopilot has a fully working 3D panel and dialog.
  
 
=== ELT ===
 
=== ELT ===
The ELT (Emergency Locator Transmitter) is a device which send a message in case of aircraft crash. That message contains info about aircraft model, owner and approximate coordinates of the crashed plane, and it is made to request SAR (Search and Rescue) services. The Cessna Skymaster is the first plane equiped with a functional ELT on FlightGear; however, it's not very useful yet due a bug in the aircraft wich made it unable to be crashed. We hope it will be fixed soon.
+
 
 +
The [[ELT]] (Emergency Locator Transmitter) is a device which send a message in case of aircraft crash. That message contains info about aircraft model, owner and approximate coordinates of the crashed plane, and it is made to request SAR (Search and Rescue) services. The Cessna Skymaster is the first plane equiped with a functional ELT on FlightGear.
  
 
== External links ==
 
== External links ==
* [http://www.flightgear.org/forums/viewtopic.php?f=4&t=12733 Cessna 337G official forum post]
+
* [http://forum.flightgear.org/viewtopic.php?f=4&t=12733 Cessna 337G official forum post]
 
* [http://www.youtube.com/watch?v=-ijJa0G5NgQ Video Cessna 337G MPG HD]
 
* [http://www.youtube.com/watch?v=-ijJa0G5NgQ Video Cessna 337G MPG HD]
 +
* [http://www.bendixking.com/HWL/media/Pilot-Guides/006-18110-0000_5.pdf Bendix King Silver Crown Plus Avionics Systems Pilot’s Guide]
  
[[Category:Aircraft]]
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{{Cessna}}
[[Category:Civilian aircraft]]
+
  
 +
[[de:Cessna 337G Skymaster]]
 
[[es:Cessna 337G Skymaster]]
 
[[es:Cessna 337G Skymaster]]
 +
[[fr:Cessna 337G Skymaster]]

Latest revision as of 09:27, 14 January 2017

Cessna 337G Skymaster
FGAddon
Cessna337 01.png
General view of the Skymaster cockpit
General view of the Skymaster cockpit
Type Civil utility aircraft
Configuration Twin boom aircraft, High wing aircraft
Propulsion Push-pull aircraft, Propeller aircraft
Manufacturer Cessna
Author(s)
  • Fernando Espinosa
  • Pavel Cueto
FDM JSBSim
--aircraft= Cessna337
Status Production
 FDM Stars-3.png
 Systems Stars-3.png
 Cockpit Stars-5.png
 Model Stars-5.png
Development
 Website The website for the Cessna 337G Skymaster developments.
 Repository The development repository of the Cessna 337G Skymaster.
Download Download the Cessna 337G Skymaster aircraft package for the current stable release (2020.1).
License GPLv2+

The Cessna 337 is a twin-engine aircraft built in a push-pull configuration. Instead of the engines being mounted on the wings, one is mounted on the nose and the other at the rear of the pod-style fuselage. The stabilizers are mounted on booms that extend from the wings. The Skymaster has a retractable undercarriage that gives it that little bit of extra speed.

The combination of a tractor and a pusher engine produces a unique sound.

Aircraft help

Aircraft keys

Key Function
d Open/close cockpit door
c Open/close front cowl flaps
C Open/close rear cowl flaps
m/ Shift+M Adjust fuel mixture
n/ Shift+N Adjust speed governor (propeller pitch)

Limits

  • VNE: 198 KIAS (Never exceed speed)
  • VNO: 167 KIAS (Max. speed for normal operations)
  • VA: 140 KIAS (Design maneuvering speed)
  • VFE: 109 KIAS (Max. full flap extended speed)
  • VLE: 200 KIAS (Max. landing gear extended speed)
  • VLO: 140 KIAS (Max. landing gear extend/retract speed)
  • Stall speed, full flaps: 61 KIAS
  • Stall speed, zero flaps: 70 KIAS
  • Max. weight: 4630 lbs. (2100 kg)
  • Service ceiling (two engines): 18,000 ft
  • Ground run for takeoff: 1,000 ft
  • Ground roll for landing 700 ft

Normal procedures

The model is pretty detailed, and users can select between 5 HQ liveries
Nice view of the Skymaster cockpit at night

Startup

  • Turn ON battery and front and rear generators
  • Turn ON master avionics button (left wall panel)
  • Turn ON the avionics (NAV/COMM Radios, DME, ADF...)
  • Turn ON fuel pumps (not implemented yet)
  • Turn ON required lights and pitot heat
  • Open front and rear cowl flaps
  • Turn ON rear magnetos (mouse wheel), continue turning the knob for starter (left button)
  • Turn ON front magnetos, continue turning the knob for starter

Takeoff

  • Check open front & rear cowl flaps to avoid overheating
  • Check rich mixture and high RPM speed governor (propeller pitch)
  • Full trhottle, release brakes
  • Rotate at 60 KIAS
  • Retract gear

Cruise

The Cessna 337 Skymaster has a constant-speed propeller; so, you can increase propeller pitch to get more airspeed, but with a loss of engine RPM and power.

  • Decrease throttle to desired power
  • Decrease RPM with speed governor (propeller pitch)
  • Adjust mixture depending on flight altitude (for 5000ft or more). Check EGT for best mixture.
  • Close cowl flaps

Landing

  • Open cowl flaps
  • Increase RPM with speed governor (propeller pitch) to maximum
  • Reduce power with throttle
  • Open landing gear
  • Deploy flaps gradually under 110 KIAS
  • Touchdown at 75/60 KIAS, depending on aircraft weight

Systems

Detail of the avionics panel

The Cessna 337 still in development, but it has some suitable systems. Electrical, vacuum and fuel system are working, but they have no failure system modelled yet. Users can adjust the weight of each seat on the plane and fuel amount. Almost all buttons, knobs and levers are functional and properly animated, and all instruments are labeled for a properly identification.

About knobs, use scroll mouse for gross adjustments, and left-central buttons for fine tunning. When setting radio frequencies, the mouse scroll will adjust integral numbers, and buttons will tune decimals. Try that method with instruments, cowl flap switches, trim levers, magnetos, etc.

Avionics

The Skymaster release is provided with a working Bendix/King avionics pack, capable of full IFR/night navigation:

  • 2 KX-155 COMM/NAV Radios, attached to a pair of KI-206 VOR locators
  • KN-62A DME receiver with internal frequency hold and NAV1 remote operation
  • KR-87 ADF receiver, attached to a KI-227 ADF locator
  • KMA-24 Audio panel
  • KT-76A Transponder, with radar sweep simulation
  • KI-250 Radar altimeter, capable to mark decision height for low-visibility landings
  • Hobbs Meter
Note  A full KMA24 audio panel implementation was added in January 2017. The knob on the right of the unit switches the speaker amplifier on and off and also controls the marker beacon receiver. To hear ATIS broadcasts, either switch the comm radio output using the COMM phone switch, or use the COMM speaker switch with the knob in any position other than off. To hear marker beacon idents, the knob must be in any other position than off and one of the MKR switches selected on the panel.

Radio stack instruments are modelled according to the Bendix King pilot guides. Refer to those guides for operating instructions. [1]

Autopilot

The Cessna 337G Skymaster/Navomatic 400A autopilot has a fully working 3D panel and dialog.

ELT

The ELT (Emergency Locator Transmitter) is a device which send a message in case of aircraft crash. That message contains info about aircraft model, owner and approximate coordinates of the crashed plane, and it is made to request SAR (Search and Rescue) services. The Cessna Skymaster is the first plane equiped with a functional ELT on FlightGear.

External links