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Zeppelin NT: Difference between revisions
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→Handling instructions: Renamed to Important controls and keys
(→Handling instructions: Renamed to Important controls and keys) |
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== | ==Important controls / keys== | ||
===Flight controls=== | |||
* Rudder (Aileron input is transferred to the rudder for convenience.) At low speed the rudder is automatically augmented by a tail mounted side thruster controlled by the flight control system. | * Rudder (Aileron input is transferred to the rudder for convenience.) At low speed the rudder is automatically augmented by a tail mounted side thruster controlled by the flight control system. | ||
* Elevator | * Elevator (The elevator trim is seldom used see below for pitch trim.) | ||
===Engines and thrust vectoring=== | |||
The Zeppelin NT has a non-standard set of engine controls. The engines' throttles are controlled by govenors - the throttle levers select the desired RPM. | The Zeppelin NT has a non-standard set of engine controls. The engines' throttles are controlled by govenors - the throttle levers select the desired RPM. | ||
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[[Image:Zeppelin_NT_center_console.jpg]] | [[Image:Zeppelin_NT_center_console.jpg]] | ||
===Gas and Envelope=== | |||
* F/f - Open/close the gas valve. | * F/f - Open/close the gas valve. | ||
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The fore and aft ballonets (air-filled bags inside the envelope) serve two purposes: (i) by inflating/deflating they maintain the pressure differential and volume of the envelope when the gas changes volume; and (ii) the trim of the airship can be changed by the relative inflation of the ballonets. While the required envelope pressure dictate the total volume of the ballonets the airship can be trimmed by having one ballonet more or less inflated than the other. | The fore and aft ballonets (air-filled bags inside the envelope) serve two purposes: (i) by inflating/deflating they maintain the pressure differential and volume of the envelope when the gas changes volume; and (ii) the trim of the airship can be changed by the relative inflation of the ballonets. While the required envelope pressure dictate the total volume of the ballonets the airship can be trimmed by having one ballonet more or less inflated than the other. | ||
====Envelop pressure management==== | |||
When the airship rises the gas in the envelope expands and consequently the the total volume of the ballonets has to decrease or the envelope pressure will increase. There are pressure relief valves that automatically open when the pressure in the ballonet exceeds a set limit (which is lower than that of the gas relief valve to prevent gas being valved before both ballonets are empty) but the prudent airship pilot would rather use the manual ballonet valves than rely on the relief valves. | When the airship rises the gas in the envelope expands and consequently the the total volume of the ballonets has to decrease or the envelope pressure will increase. There are pressure relief valves that automatically open when the pressure in the ballonet exceeds a set limit (which is lower than that of the gas relief valve to prevent gas being valved before both ballonets are empty) but the prudent airship pilot would rather use the manual ballonet valves than rely on the relief valves. | ||
When the airship descends the increasing ambient pressure causes the gas in the envelope to contract and to maintain the envelope pressure above the ambient pressure total volume of the ballonets has to increase. The pilot has to set the ballonet controls for inflation. If the envelope pressure drops too low an alarm will sound. Monitor the gas pressure gauge! | When the airship descends the increasing ambient pressure causes the gas in the envelope to contract and to maintain the envelope pressure above the ambient pressure total volume of the ballonets has to increase. The pilot has to set the ballonet controls for inflation. If the envelope pressure drops too low an alarm will sound. Monitor the gas pressure gauge! | ||
====Pitch trim==== | |||
On the Zeppelin NT pitch trimming is done via the relative fore/aft ballonet inflation rather than with the elevator trim. | On the Zeppelin NT pitch trimming is done via the relative fore/aft ballonet inflation rather than with the elevator trim. | ||
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* To trim towards tail heavy - set the aft ballonet valve for inflation and/or the fore for deflation. | * To trim towards tail heavy - set the aft ballonet valve for inflation and/or the fore for deflation. | ||
===Ballast=== | |||
The Zeppelin NT has no ballast approved for inflight adjustment. Use on ground only. | The Zeppelin NT has no ballast approved for inflight adjustment. Use on ground only. | ||
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* D/d - Drop ballast in 1%/0.1% decrements. | * D/d - Drop ballast in 1%/0.1% decrements. | ||
===Ground crew / Mooring mast=== | |||
* Y - Release mooring mast connection or wire. | * Y - Release mooring mast connection or wire. | ||
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<max-simtime-per-frame>0.1</max-simtime-per-frame> | <max-simtime-per-frame>0.1</max-simtime-per-frame> | ||
==Cockpit and instruments== | |||
[[Image:Zeppelin_NT_cockpit.jpg]] | [[Image:Zeppelin_NT_cockpit.jpg]] | ||