EICAS - Revision history

codex: Link the RCS system reference from the nozzle indication guide

2026-11-09T23:01:15Z

Link the RCS system reference from the nozzle indication guide

← Older revision		Revision as of 23:01, 9 November 2026
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	===E-10 and E-11 RCS indications===		===E-10 and E-11 RCS indications===
	The E-10 and E-11 show RCS activity on the aircraft outline, separately from the main-engine bars and landing gear. The four circular indicators represent vertical RCS groups at the front and rear hull shoulders. Lateral arrows appear beside the front and rear groups. The two forward arrows and the two aft arrows near the tail represent the shared fore/aft RCS indication; each pair repeats the same activity.		The E-10 and E-11 show [[RCS]] activity on the aircraft outline, separately from the main-engine bars and landing gear. The four circular indicators represent vertical RCS groups at the front and rear hull shoulders. Lateral arrows appear beside the front and rear groups. The two forward arrows and the two aft arrows near the tail represent the shared fore/aft RCS indication; each pair repeats the same activity.

	{\| class="wikitable"		{\| class="wikitable"
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	Attitude control and translation share the installed jets. Simultaneous demands can reduce the available response; an indication shows what the jets actually deliver, rather than the pilot's requested command. Opposing trim jets can consume fuel and show plumes while their translational forces cancel.		Attitude control and translation share the installed jets. Simultaneous demands can reduce the available response; an indication shows what the jets actually deliver, rather than the pilot's requested command. Opposing trim jets can consume fuel and show plumes while their translational forces cancel.

			See [[RCS#Controls and directions\|RCS controls and directions]] and [[RCS#Handling and shared limits\|handling and shared limits]] for the installed force ratings and control-mode restrictions.

	===W-6 RCS indications===		===W-6 RCS indications===

codex: Document common 80 kN delivered RCS indication scale and shared nozzle allocation

2026-11-09T22:48:17Z

Document common 80 kN delivered RCS indication scale and shared nozzle allocation

← Older revision		Revision as of 22:48, 9 November 2026
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	\| Cyan arrow \|\| The emitting outlet and exhaust direction. Left-side arrows mean rightward force; right-side arrows mean leftward force. Aft arrows mean forward force; bow arrows mean reverse force.		\| Cyan arrow \|\| The emitting outlet and exhaust direction. Left-side arrows mean rightward force; right-side arrows mean leftward force. Aft arrows mean forward force; bow arrows mean reverse force.
	\|-		\|-
	\| Filled portion of the outer ring \|\| ~~Relative activity of that vertical RCS group~~; ~~more fill~~ means ~~greater indicated output~~.		\| Filled portion of the outer ring \|\| Delivered output on the common 80 kN-per-nozzle scale; a full ring means 80 kN from that nozzle.
	\|-		\|-
	\| Gray outline, with no + or − \|\| Output is at or below the 2% display threshold; small stabilizing corrections may still be present.		\| Gray outline, with no + or − \|\| Output is at or below the 2% display threshold; small stabilizing corrections may still be present.
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	For a nose-up correction, the front circles show '''+''' (underside exhaust) and the rear circles show '''−''' (topside exhaust). For a right roll, the left circles show '''+''' and the right circles show '''−'''. A nose-right yaw correction lights the front-left and rear-right lateral arrows. The opposite corrections reverse these indications. Each of the four circles represents an opposed upper/lower pair; the eight vertical directions are not eight independent channels.		For a nose-up correction, the front circles show '''+''' (underside exhaust) and the rear circles show '''−''' (topside exhaust). For a right roll, the left circles show '''+''' and the right circles show '''−'''. A nose-right yaw correction lights the front-left and rear-right lateral arrows. The opposite corrections reverse these indications. Each of the four circles represents an opposed upper/lower pair; the eight vertical directions are not eight independent channels.

			The E-10, E-11 and W-6 use the same 80 kN RCS nozzle rating. The indications show delivered output after power, health and allocation limits. Each fore/aft arrow pair represents two nozzles firing at the same fraction: 100% is 80 kN per nozzle, or 160 kN for the pair. The 2% display threshold corresponds to 1.6 kN per nozzle.

			Attitude control and translation share the installed jets. Simultaneous demands can reduce the available response; an indication shows what the jets actually deliver, rather than the pilot's requested command. Opposing trim jets can consume fuel and show plumes while their translational forces cancel.

	===W-6 RCS indications===		===W-6 RCS indications===

codex: Document W-6 actual spoiler-position bars and ground lift-dump operation

2026-11-09T19:28:56Z

Document W-6 actual spoiler-position bars and ground lift-dump operation

← Older revision		Revision as of 19:28, 9 November 2026
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	The RCS rings and arrows are separate from the green main-engine STOVL bars and their door status. Main-engine LIFT output does not light the RCS symbols. Amber '''RCS DATA''' appears above the aircraft outline when valid RCS indication data is unavailable.		The RCS rings and arrows are separate from the green main-engine STOVL bars and their door status. Main-engine LIFT output does not light the RCS symbols. Amber '''RCS DATA''' appears above the aircraft outline when valid RCS indication data is unavailable.

			===W-6 spoiler indications===
			The W-6 has one continuous slanted spoiler-position bar on each aft wing, toward the wing root. These bars are separate from the leading-edge flaps, engine indications and RCS symbols. Engine bars and labels remain visible in front where their positions overlap.

			A gray outline with a black interior means the panel is retracted. Green fill increases with extension; a fully extended panel fills the interior green. Each wing follows its own actual animated panel position, including travel between settings, rather than jumping immediately to the selected command. An amber outline means valid panel-position data is unavailable; do not interpret it as normal retraction.

			Automatic ground lift dump requires ground contact, surface-relative rollout above 8 m/s (about 15.6 kt), and idle or reverse selection on all engines. It retracts at or below that rollout speed or when ground contact ends. Wind over a stopped aircraft does not count as rollout, and the parking brake is not a spoiler command. Manually selected flight spoilers remain independent. The position bars continue to indicate panel position on the ground, during VTOL/hover, atmospheric flight, ascent, suborbital coast, orbit and re-entry.

	===W-6 STOVL indications===		===W-6 STOVL indications===

codex: Document W-6 RCS layout, firing-side arrows and separation from STOVL indications

2026-11-09T17:19:25Z

Document W-6 RCS layout, firing-side arrows and separation from STOVL indications

← Older revision		Revision as of 17:19, 9 November 2026
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	For a nose-up correction, the front circles show '''+''' (underside exhaust) and the rear circles show '''−''' (topside exhaust). For a right roll, the left circles show '''+''' and the right circles show '''−'''. A nose-right yaw correction lights the front-left and rear-right lateral arrows. The opposite corrections reverse these indications. Each of the four circles represents an opposed upper/lower pair; the eight vertical directions are not eight independent channels.		For a nose-up correction, the front circles show '''+''' (underside exhaust) and the rear circles show '''−''' (topside exhaust). For a right roll, the left circles show '''+''' and the right circles show '''−'''. A nose-right yaw correction lights the front-left and rear-right lateral arrows. The opposite corrections reverse these indications. Each of the four circles represents an opposed upper/lower pair; the eight vertical directions are not eight independent channels.

			===W-6 RCS indications===
			The W-6 uses the same RCS colors, signs and 2% display threshold described above, with the symbols arranged for the Manx installation. The two front circles sit beside the forward fuselage and the two aft circles sit at the wing roots, below the main-gear indications. The front lateral arrows are beside the nose; the rear lateral arrows are at the wingtips. Paired bow and aft arrows show the shared longitudinal RCS output.

			For rightward translation, the left nose and left wingtip arrows light; for forward translation, both aft arrows light. A nose-up correction shows '''+''' in the front circles and '''−''' in the aft circles. These are aircraft-relative indications, including when banked, in orbit or under automatic control. Gray symbols do not mean the system is disabled: corrections at or below 2% remain hidden.

			The RCS rings and arrows are separate from the green main-engine STOVL bars and their door status. Main-engine LIFT output does not light the RCS symbols. Amber '''RCS DATA''' appears above the aircraft outline when valid RCS indication data is unavailable.

	===W-6 STOVL indications===		===W-6 STOVL indications===

codex: Describe pressure-only W-6 INHIB and actual STOVL flow in orbit

2026-11-08T04:27:46Z

Describe pressure-only W-6 INHIB and actual STOVL flow in orbit

← Older revision		Revision as of 04:27, 8 November 2026
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	Beneath each engine, '''DOOR CLSD''' and '''DOOR OPEN''' report the downward-nozzle door position; '''OPENING''' and '''CLOSING''' identify travel. The doors must open before downward thrust can flow and remain open through normal spool-down. '''DOOR ---''' means valid door/propulsion data is unavailable. Amber '''INHIB''' appears beneath the door status when powered propulsion is outside the permitted lift envelope or inhibited. It does not mean axial thrust is unavailable; read the engine mode and actual flow.		Beneath each engine, '''DOOR CLSD''' and '''DOOR OPEN''' report the downward-nozzle door position; '''OPENING''' and '''CLOSING''' identify travel. The doors must open before downward thrust can flow and remain open through normal spool-down. '''DOOR ---''' means valid door/propulsion data is unavailable. Amber '''INHIB''' appears beneath the door status when powered propulsion is outside the permitted lift envelope or inhibited. It does not mean axial thrust is unavailable; read the engine mode and actual flow.

	These indications follow the ~~existing~~ [[VTOL]] ~~restrictions~~ during ground operation, hover, atmospheric flight, ascent, suborbital coast, orbit and re-entry. ~~Low~~ speed ~~alone does not establish that lift is available~~. In orbit, the doors ~~remain closed~~ and ~~main-~~engine ~~axial output remains available;~~ RCS activity is separate and is not shown by these bars. Landing-gear symbols remain separate.		These indications follow the [[VTOL#Operating envelope\|door dynamic-pressure protection]] during ground operation, hover, atmospheric flight, ascent, suborbital coast, orbit and re-entry. Downward thrust is inhibited above '''4,000 Pa''' and re-enables below '''3,200 Pa''', subject to power, engine condition and other propulsion interlocks. There is no independent speed, altitude or vacuum restriction. In orbit, a lift request can open the doors and produce '''STOVL''' indications once downward flow begins; with no lift request or residual flow, the doors close. Forward, reverse and downward thrust continue to share one engine budget. RCS activity is separate and is not shown by these bars. Landing-gear symbols remain separate.

	== MFD page selection ==		== MFD page selection ==

codex: Clarify RCS emitting-side arrows and all upper/lower vertical directions

2026-11-07T22:10:12Z

Clarify RCS emitting-side arrows and all upper/lower vertical directions

← Older revision		Revision as of 22:10, 7 November 2026
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	==Engine Indication and Crew Alerting System==		==Engine Indication and Crew Alerting System==
	[[File:EICAS-Eseries-annotated.png\|thumb\|center\|1000px\|Annotated E-10 / E-11 EICAS mock-up showing split bow/aft exhaust bars and RCS indications. Main-engine bars show exhaust flow; ~~RCS symbols~~ show body-force direction. Readings are illustrative, not a flight screenshot or a performance specification.]]		[[File:EICAS-Eseries-annotated.png\|thumb\|center\|1000px\|Annotated E-10 / E-11 EICAS mock-up showing split bow/aft exhaust bars and RCS indications. Main-engine bars and RCS arrows show exhaust flow; vertical + / − signs show body-force direction. Readings are illustrative, not a flight screenshot or a performance specification.]]
	EICAS is an acronym for Engine Indication and [[CAS\|Crew Alerting System]]. <br>		EICAS is an acronym for Engine Indication and [[CAS\|Crew Alerting System]]. <br>
	One interlinked system that informs the crew about aircraft operation and warnings about abnormal settings or situations.		One interlinked system that informs the crew about aircraft operation and warnings about abnormal settings or situations.
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	! Indication !! Meaning		! Indication !! Meaning
	\|-		\|-
	\| Cyan '''+''' inside a ring \|\| RCS force toward the top of the aircraft (body up).		\| Cyan '''+''' inside a ring \|\| RCS force toward the top of the aircraft (body up), from underside exhaust.
	\|-		\|-
	\| Cyan '''−''' inside a ring \|\| RCS force toward the underside of the aircraft (body down).		\| Cyan '''−''' inside a ring \|\| RCS force toward the underside of the aircraft (body down), from topside exhaust.
	\|-		\|-
	\| Cyan arrow \|\| ~~RCS~~ force ~~in the arrow's direction: left,~~ right, forward ~~or aft~~.		\| Cyan arrow \|\| The emitting outlet and exhaust direction. Left-side arrows mean rightward force; right-side arrows mean leftward force. Aft arrows mean forward force; bow arrows mean reverse force.
	\|-		\|-
	\| Filled portion of the outer ring \|\| Relative activity of that vertical RCS group; more fill means greater indicated output.		\| Filled portion of the outer ring \|\| Relative activity of that vertical RCS group; more fill means greater indicated output.
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	Cyan arrows, circle signs and cyan ring fill appear only when the magnitude of that group's indicated output exceeds 2%. At or below 2%, the outlines remain gray and the circles have no + or −. Above the threshold, ring fill shows the original output percentage without rescaling. This display threshold does not change RCS thrust or automatic stabilization.		Cyan arrows, circle signs and cyan ring fill appear only when the magnitude of that group's indicated output exceeds 2%. At or below 2%, the outlines remain gray and the circles have no + or −. Above the threshold, ring fill shows the original output percentage without rescaling. This display threshold does not change RCS thrust or automatic stabilization.

	Directions are relative to the aircraft, not the horizon. RCS arrows ~~indicate force direction, whereas~~ the animated main-engine bars indicate exhaust flow. A pitch or roll correction can light opposite signs at different hull groups without translating the aircraft. The indications follow RCS activity under manual control, TVM and DOR, including atmospheric and orbital operation; they do not announce whether main-engine VTOL is available.		Directions are relative to the aircraft, not the horizon. Both RCS arrows and the animated main-engine bars indicate exhaust flow. Vertical + / − signs indicate force on the aircraft. A pitch or roll correction can light opposite signs at different hull groups without translating the aircraft. The indications follow RCS activity under manual control, TVM and DOR, including atmospheric and orbital operation; they do not announce whether main-engine VTOL is available.

			For a nose-up correction, the front circles show '''+''' (underside exhaust) and the rear circles show '''−''' (topside exhaust). For a right roll, the left circles show '''+''' and the right circles show '''−'''. A nose-right yaw correction lights the front-left and rear-right lateral arrows. The opposite corrections reverse these indications. Each of the four circles represents an opposed upper/lower pair; the eight vertical directions are not eight independent channels.

	===W-6 STOVL indications===		===W-6 STOVL indications===

codex: Clarify the RCS display threshold and near-zero idle symbols

2026-11-07T04:15:08Z

Clarify the RCS display threshold and near-zero idle symbols

← Older revision		Revision as of 04:15, 7 November 2026
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	\| Filled portion of the outer ring \|\| Relative activity of that vertical RCS group; more fill means greater indicated output.		\| Filled portion of the outer ring \|\| Relative activity of that vertical RCS group; more fill means greater indicated output.
	\|-		\|-
	\| Gray outline, with no + or − \|\| ~~No activity indicated for that group~~.		\| Gray outline, with no + or − \|\| Output is at or below the 2% display threshold; small stabilizing corrections may still be present.
	\|-		\|-
	\| Amber '''RCS DATA''' \|\| Valid RCS indication data is unavailable. Do not interpret this as zero thrust.		\| Amber '''RCS DATA''' \|\| Valid RCS indication data is unavailable. Do not interpret this as zero thrust.
	\|}		\|}

			Cyan arrows, circle signs and cyan ring fill appear only when the magnitude of that group's indicated output exceeds 2%. At or below 2%, the outlines remain gray and the circles have no + or −. Above the threshold, ring fill shows the original output percentage without rescaling. This display threshold does not change RCS thrust or automatic stabilization.

	Directions are relative to the aircraft, not the horizon. RCS arrows indicate force direction, whereas the animated main-engine bars indicate exhaust flow. A pitch or roll correction can light opposite signs at different hull groups without translating the aircraft. The indications follow RCS activity under manual control, TVM and DOR, including atmospheric and orbital operation; they do not announce whether main-engine VTOL is available.		Directions are relative to the aircraft, not the horizon. RCS arrows indicate force direction, whereas the animated main-engine bars indicate exhaust flow. A pitch or roll correction can light opposite signs at different hull groups without translating the aircraft. The indications follow RCS activity under manual control, TVM and DOR, including atmospheric and orbital operation; they do not announce whether main-engine VTOL is available.

codex: Add annotated E-series EICAS mock-up with split outlet bars and RCS; retain legacy layout link

2026-11-07T03:18:00Z

Add annotated E-series EICAS mock-up with split outlet bars and RCS; retain legacy layout link

← Older revision		Revision as of 03:18, 7 November 2026
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	==Engine Indication and Crew Alerting System==		==Engine Indication and Crew Alerting System==
	[[~~Image~~:~~eicas~~.png\|thumb\|~~right~~\|~~500px~~\|~~Legacy~~ EICAS ~~layout with single~~-~~ended~~ engine ~~thrust~~ bars.]]		[[File:EICAS-Eseries-annotated.png\|thumb\|center\|1000px\|Annotated E-10 / E-11 EICAS mock-up showing split bow/aft exhaust bars and RCS indications. Main-engine bars show exhaust flow; RCS symbols show body-force direction. Readings are illustrative, not a flight screenshot or a performance specification.]]
	EICAS is an acronym for Engine Indication and [[CAS\|Crew Alerting System]]. <br>		EICAS is an acronym for Engine Indication and [[CAS\|Crew Alerting System]]. <br>
	One interlinked system that informs the crew about aircraft operation and warnings about abnormal settings or situations.		One interlinked system that informs the crew about aircraft operation and warnings about abnormal settings or situations.
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	===Legacy engine indications===		===Legacy engine indications===
	On displays with the original single-ended thrust bars, including the T-19, the box above the engine shows an amber "REV" when reverse is selected.		On displays with the original single-ended thrust bars, including the T-19, the box above the engine shows an amber "REV" when reverse is selected. See the [[:File:Eicas.png\|annotated legacy EICAS layout]].

	===E-10, E-11 and A-4 split-flow indications===		===E-10, E-11 and A-4 split-flow indications===

codex: Document E-10/E-11 RCS rings, signed body-force arrows and shared fore/aft indication

2026-11-07T03:03:07Z

Document E-10/E-11 RCS rings, signed body-force arrows and shared fore/aft indication

← Older revision		Revision as of 03:03, 7 November 2026
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	The E-10/E-11 tail engine remains axial during VTOL. Its bar shows actual tail thrust, including thrust allocated to balance axial force from the wing engines. The A-4 has two tilting engines and no tail engine. During atmospheric flight, ascent, suborbital coast, orbit and re-entry, the bars continue to show actual main-engine outlet flow; the presence of a bar does not mean VTOL is permitted in that flight regime. These bars do not display RCS activity. Landing-gear indications remain separate.		The E-10/E-11 tail engine remains axial during VTOL. Its bar shows actual tail thrust, including thrust allocated to balance axial force from the wing engines. The A-4 has two tilting engines and no tail engine. During atmospheric flight, ascent, suborbital coast, orbit and re-entry, the bars continue to show actual main-engine outlet flow; the presence of a bar does not mean VTOL is permitted in that flight regime. These bars do not display RCS activity. Landing-gear indications remain separate.

			===E-10 and E-11 RCS indications===
			The E-10 and E-11 show RCS activity on the aircraft outline, separately from the main-engine bars and landing gear. The four circular indicators represent vertical RCS groups at the front and rear hull shoulders. Lateral arrows appear beside the front and rear groups. The two forward arrows and the two aft arrows near the tail represent the shared fore/aft RCS indication; each pair repeats the same activity.

			{\| class="wikitable"
			! Indication !! Meaning
			\|-
			\| Cyan '''+''' inside a ring \|\| RCS force toward the top of the aircraft (body up).
			\|-
			\| Cyan '''−''' inside a ring \|\| RCS force toward the underside of the aircraft (body down).
			\|-
			\| Cyan arrow \|\| RCS force in the arrow's direction: left, right, forward or aft.
			\|-
			\| Filled portion of the outer ring \|\| Relative activity of that vertical RCS group; more fill means greater indicated output.
			\|-
			\| Gray outline, with no + or − \|\| No activity indicated for that group.
			\|-
			\| Amber '''RCS DATA''' \|\| Valid RCS indication data is unavailable. Do not interpret this as zero thrust.
			\|}

			Directions are relative to the aircraft, not the horizon. RCS arrows indicate force direction, whereas the animated main-engine bars indicate exhaust flow. A pitch or roll correction can light opposite signs at different hull groups without translating the aircraft. The indications follow RCS activity under manual control, TVM and DOR, including atmospheric and orbital operation; they do not announce whether main-engine VTOL is available.

	===W-6 STOVL indications===		===W-6 STOVL indications===

codex: Document the A-4 two-engine split-flow EICAS layout and engine numbering

2026-10-25T21:21:06Z

Document the A-4 two-engine split-flow EICAS layout and engine numbering

← Older revision		Revision as of 21:21, 25 October 2026
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	On displays with the original single-ended thrust bars, including the T-19, the box above the engine shows an amber "REV" when reverse is selected.		On displays with the original single-ended thrust bars, including the T-19, the box above the engine shows an amber "REV" when reverse is selected.

	===E-10 ~~and~~ E-11 split-flow indications===		===E-10, E-11 and A-4 split-flow indications===
	~~In client versions equipped with~~ the ~~split-flow~~ E-10/E-11 ~~display~~, each engine bar grows outward from a central white datum. The upper half shows exhaust from the bow outlet; the lower half shows exhaust from the aft outlet. These are exhaust directions, not directions of aircraft motion: aft exhaust produces forward thrust, while bow exhaust produces reverse thrust.		On the E-10, E-11 and A-4 split-flow displays, each engine bar grows outward from a central white datum. The upper half shows exhaust from the bow outlet; the lower half shows exhaust from the aft outlet. These are exhaust directions, not directions of aircraft motion: aft exhaust produces forward thrust, while bow exhaust produces reverse thrust.

	The number beside each half is actual outlet output as a percentage of its own rating. Each half has an independent 0-100% scale. Both wing-engine halves can be filled during [[VTOL]]; two 100% readings do not mean 200% net axial thrust or 200% vertical lift. The bars report outlet output before its force is resolved into axial and vertical components. Moving chevrons stay inside the filled area and follow the exhaust direction. Remaining flow continues to be indicated during spool-down after the thrust request is released.		The number beside each half is actual outlet output as a percentage of its own rating. Each half has an independent 0-100% scale. Both wing-engine halves can be filled during [[VTOL]]; two 100% readings do not mean 200% net axial thrust or 200% vertical lift. The bars report outlet output before its force is resolved into axial and vertical components. Moving chevrons stay inside the filled area and follow the exhaust direction. Remaining flow continues to be indicated during spool-down after the thrust request is released.

	~~The~~ engine boxes identify ENG1 (left), ENG2 (tail) and ENG3 (right), ~~with these~~ mode labels:		On the E-10 and E-11, the engine boxes identify ENG1 (left), ENG2 (tail) and ENG3 (right). On the A-4, ENG1 is the left engine and ENG2 is the right engine; both use the VTOL bars, arranged side by side without an aircraft background. These displays use the following mode labels:
	*'''FWD / REV:''' aft-only or bow-only exhaust with the nozzles in their axial position. These are green normal-operation indications.		*'''FWD / REV:''' aft-only or bow-only exhaust with the nozzles in their axial position. These are green normal-operation indications.
	*'''MIX:''' both axial outlets have flow.		*'''MIX:''' both axial outlets have flow.
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	*'''DATA:''' valid propulsion data is unavailable; shown in amber with dashes in place of outlet percentages. Do not read this as zero thrust.		*'''DATA:''' valid propulsion data is unavailable; shown in amber with dashes in place of outlet percentages. Do not read this as zero thrust.

	The E-10/E-11 tail engine remains axial during VTOL. Its bar shows actual tail thrust, including thrust allocated to balance axial force from the wing engines. During atmospheric flight, ascent, suborbital coast, orbit and re-entry, the bars continue to show actual main-engine outlet flow; the presence of a bar does not mean VTOL is permitted in that flight regime. These bars do not display RCS activity. Landing-gear indications remain separate.		The E-10/E-11 tail engine remains axial during VTOL. Its bar shows actual tail thrust, including thrust allocated to balance axial force from the wing engines. The A-4 has two tilting engines and no tail engine. During atmospheric flight, ascent, suborbital coast, orbit and re-entry, the bars continue to show actual main-engine outlet flow; the presence of a bar does not mean VTOL is permitted in that flight regime. These bars do not display RCS activity. Landing-gear indications remain separate.

	===W-6 STOVL indications===		===W-6 STOVL indications===