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Grumman F-14 Tomcat: Difference between revisions
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== Aircraft help == | == Aircraft help == | ||
=== Engine Start (JSBSim) === | === Engine Start (JSBSim) === | ||
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* Select MIL thrust; or afterburners if conditions dictate. It is usual operating procedure on an F-14B to not use afterburners on take off unless heavily loaded as in the event of engine failure after rotation the resulting yaw moment is likely to result in an uncontrolled departure. | * Select MIL thrust; or afterburners if conditions dictate. It is usual operating procedure on an F-14B to not use afterburners on take off unless heavily loaded as in the event of engine failure after rotation the resulting yaw moment is likely to result in an uncontrolled departure. | ||
* At around 145 knots pull back on the stick until the nose raises at which point maintain stick pressure and when 250 feet AGL raise the gear. By 200 knots the flaps should be fully retracted. Note that as the flaps are retracted the longitudinal balance of the aircraft changes and it will tend to pitch down slightly which should be corrected by using the pitch trim. | * At around 145 knots pull back on the stick until the nose raises at which point maintain stick pressure and when 250 feet AGL raise the gear. By 200 knots the flaps should be fully retracted. Note that as the flaps are retracted the longitudinal balance of the aircraft changes and it will tend to pitch down slightly which should be corrected by using the pitch trim. | ||
=== Hydruaulics System === | |||
The F-14 has two separate hydraulic systems; identified as the '''Flight System''' and the '''Combined System'''. The flight system powers the primary flight controls and surfaces, and the combined powers everything else. | |||
Both hydraulic systems are powered by engine driven pumps. There are two backup systems for the hydraulics in case of an engine (primary) pump malfunction. The first of these is a Bi-Directional transfer pump that can powered one system from the other system. The second method is an electrically powered pump. The electrically powered pump has its own small reservoir - so once powered on the electrically powered pump should not be powered off as the hydraulic fuel expands and is lost - so there may not be enough fluid remaining in the reservoir to allow the pump to start. | |||
When there is insufficient hydraulic power the powered items will no longer function; so in the even of a dual engine flameout the flight controls will be inoperable. | |||
Sufficient hydraulic pressure for smooth flight control inputs should be available with one engine windmilling at 18% rpm or two engines at windmilling at 11% rpm. | |||
References: F14-AAD-1 p2-68 to p2-76 | |||
=== Electrical System === | |||
The F-14 electrical system is modeled sufficiently well to provide all visible effects. | |||
There is a generator on each engine powered by a Constant Speed Drive (CSD) with emergency hydraulic generator that is powered by the combined hydraulic system. | |||
* Main generators drop off at 55% N2. | |||
* Emergency generator drop off at 11-12% RPM. | |||
* Engine ignition not available below 10% | |||
* Emergency generator 1kva or kVa essential AC and Buses No1 and No2. and AFCS | |||
* When hydraulic transfer pump operating and sufficient pressure emergency power will drop to 1kVa mode and power only the essential AC and Dc No. 1 buses. | |||
In the model on the left main bus and the DC essential bus are used; however upon loss of electrical power from the main bus the non-essential will no longer be powered (e.g. the HUD, VSD, HSD). | |||
References: F14-AAD-1 p2-68 to p2-76 | |||
=== Autopilot Operation === | === Autopilot Operation === | ||
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At the moment, only the gun and the AIM-9s are operational, others ordinances are displayed under the wing, their weight is correct but they aren't usable. | At the moment, only the gun and the AIM-9s are operational, others ordinances are displayed under the wing, their weight is correct but they aren't usable. | ||
* '''Gun:''' At startup, the ammunition store is filled with 675 round. There is an option on the '''Fuel and Stores''' dialog in the '''Tomact Controls''' Menu to allow the gun to be reloaded | |||
* '''Gun:''' At startup, the ammunition store is filled with 675 round. | |||
To fire the M61A1 Vulcan: | |||
* Select HUD A/A Mode on the Display panel, on pilot's right console. A multikey shortcut is also available {{Key press|:}}{{Key press|A}}{{Key press|H}}{{Key press|a}}. Having the HUD in this mode is not mandatory however when the HUD is in the right mode the guidance symbology will assist with target identification and aiming. | |||
* Select Gun mode with the Stick Weapon Mode Selector ({{Key press|w}}). A pipper, the G symbol with a number showing approximately the remaining rounds x 100 and a closure rate scale are displayed in the HUD. The closure rate scale is active only if a target is locked by the radar with TWS AUTO mode (diamond on the HUD). | |||
* Switch Master Arm on cycle with {{Key press|CTRL-w}}, the X on the G symbol means Master Arm off or in training mode. | |||
* Press {{Key press|e}} to fire the gun. | |||
* '''Sidewinders:''' Crudely modeled on AIM-9L available data. | * '''Sidewinders:''' Crudely modeled on AIM-9L available data. | ||
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** Select HUD A/A Mode on the Display panel, on pilot's right console. A multikey shortcut is also available (:AHa). | ** Select HUD A/A Mode on the Display panel, on pilot's right console. A multikey shortcut is also available (:AHa). | ||
** Select SW mode with the Stick Weapon Mode Selector ({{Key press|w}}). | ** Select SW mode with the Stick Weapon Mode Selector ({{Key press|w}}). | ||
** Switch to the | ** Switch to the RIO view ({{Key press|Ctrl|v}}). | ||
** Select pylons 1 and 8, down position, on the Armament panel, on RIO's left console. A shortcut toggles these two switches so you can select or deselect all AIM-9 in one keyboard stroke ({{Key press|Ctrl|m}}) without leaving pilot's view. | ** Select pylons 1 and 8, down position, on the Armament panel, on RIO's left console. A shortcut toggles these two switches so you can select or deselect all AIM-9 in one keyboard stroke ({{Key press|Ctrl|m}}) without leaving pilot's view. | ||
** Switch back to the pilot's view ({{Key press|Ctrl|v}}). | ** Switch back to the pilot's view ({{Key press|Ctrl|v}}). | ||
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== Pilot's Cockpit == | == Pilot's Cockpit == | ||
[[File:F-14b-pilots-display-control-panel.jpg|thumb|270px|Pilot's Display Control Panel.]] | [[File:F-14b-pilots-display-control-panel.jpg|thumb|270px|Pilot's Display Control Panel.]] | ||
=== Displays Control Panel === | === Displays Control Panel === | ||
* The Display Control Panel is located on the right side of the pilot's main panel, under the Hook lever. The '''3 botom switches''' respectively turn the '''VDI''', '''HUD''' and '''HSD''' displays '''on/off'''. The '''HSD MODE''' switch is also available, it selects '''NAV''' or '''TID''' or '''ECM''' mode. This can also be achieved by cycling through these 3 modes with the {{Key press|h}} key. (''Note: the '''NAV MODE''' push buttons - '''TO''', '''CRUISE''', '''A/A''', '''A/G''', '''LDG''' - are not operational yet.'') | * The Display Control Panel is located on the right side of the pilot's main panel, under the Hook lever. The '''3 botom switches''' respectively turn the '''VDI''', '''HUD''' and '''HSD''' displays '''on/off'''. The '''HSD MODE''' switch is also available, it selects '''NAV''' or '''TID''' or '''ECM''' mode. This can also be achieved by cycling through these 3 modes with the {{Key press|h}} key. (''Note: the '''NAV MODE''' push buttons - '''TO''', '''CRUISE''', '''A/A''', '''A/G''', '''LDG''' - are not operational yet.'') | ||