E-10 Saint: Difference between revisions

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(Add separate hover capacity versus CG curve, referenced to current nominal CG)
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== Statistics ==
== Statistics ==
{{AerospaceVehicle
{{AerospaceVehicle
|cabin_pressurization=Pressurized — stored breathing gas
|max_pressure_diff=2,400 mbar (240 kPa), cabin above surroundings
|manufacturer=[[:Category:Trimbal-Kneers Aerospace|Trimbal-Kneers Aerospace]]
|manufacturer=[[:Category:Trimbal-Kneers Aerospace|Trimbal-Kneers Aerospace]]
|role=Explorer-series aerospace vehicle
|role=Explorer-series aerospace vehicle
Line 21: Line 23:
|service_ceiling=Indefinite (capable of reaching [[escape velocity]])
|service_ceiling=Indefinite (capable of reaching [[escape velocity]])
|range=Indefinite (capable of reaching [[orbit]])
|range=Indefinite (capable of reaching [[orbit]])
|thrust=2,746,358 N
|thrust=1.151211 MN per engine, forward/reverse in vacuum; 3.453632 MN total for three engines. Approximately 3.183071 MN total at reference sea level
|weapon_mounts=2
|weapon_mounts=2
|engines=3
|engines=3
Line 27: Line 29:
|avionics_bays=4
|avionics_bays=4
|stowage=7 MT (Bay 0)
|stowage=7 MT (Bay 0)
|acceleration=1.010 G fully loaded and fueled; depends on weight
|acceleration=14.50 m/s² thrust/mass at maximum gross in vacuum; before gravity and drag
|wingspan=48.75 [[meter|m]]
|wingspan=48.75 [[meter|m]]
|length=48.75 [[meter|m]]
|length=48.75 [[meter|m]]
Line 51: Line 53:


== Overspeed warning ==
== Overspeed warning ==
The E-10 currently has no configured Vne (never-exceed indicated airspeed) for the automatic overspeed clacker. The performance speeds above are not clacker thresholds. A silent clacker does not indicate protection against every speed, heating or structural hazard.
The E-10 has no specified Vne (never-exceed indicated airspeed) for the automatic overspeed clacker. The performance speeds above are not clacker thresholds. A silent clacker does not indicate protection against every speed, heating or structural hazard.


'''Client correction, 16 October 2026:''' builds containing this correction require a valid, positive Vne before starting the automatic clacker. Earlier affected builds could treat the E-10's unset limit as zero and clack at low positive indicated airspeed.


On vehicles with a configured Vne, the warning compares indicated airspeed (IAS) with the current limit, including any modeled weight, gear, door and flap adjustments. It repeats while IAS is above the limit and stops on the next audio update when IAS is at or below it, or either speed input becomes invalid. It can re-arm after recovery and follows the current condition after cockpit or audio reloads. Cockpit airspeed is displayed in m/s.
On vehicles with a configured Vne, the warning compares indicated airspeed (IAS) with the current limit, including any modeled weight, gear, door and flap adjustments. It repeats while IAS is above the limit and stops on the next audio update when IAS is at or below it, or either speed input becomes invalid. It can re-arm after recovery and follows the current condition after cockpit or audio reloads. Cockpit airspeed is displayed in m/s.


'''Power and shutdown:''' the automatic clacker requires avionics power. During normal shutdown it stops on the next audio update once power falls through the VMU's existing power cutoff; invalid power data also silences it. It cannot continue or restart from retained airspeed values or an audio reload while unpowered. Restoring power re-arms it only if a valid positive Vne is still exceeded. This is part of the 16 October 2026 correction; earlier affected builds lacked this power check.
'''Power and shutdown:''' the automatic clacker requires avionics power. It stops when the overspeed condition ends, valid speed or power data is unavailable, or avionics power falls below the VMU cutoff during shutdown. Restoring power re-arms it only while a valid positive Vne is exceeded.


This rule applies through ground operation, VTOL/hover, atmospheric flight, ascent, suborbital coast, orbit and re-entry. It uses IAS rather than true airspeed or orbital velocity, with no additional altitude cutoff or Autoflyte-dependent threshold. The automatic clacker is separate from the queued spoken [[GPWS#Audio behavior and self-test|GPWS alerts]].
This rule applies through ground operation, VTOL/hover, atmospheric flight, ascent, suborbital coast, orbit and re-entry. It uses IAS rather than true airspeed or orbital velocity, with no additional altitude cutoff or Autoflyte-dependent threshold. The automatic clacker is separate from the queued spoken [[GPWS#Audio behavior and self-test|GPWS alerts]].


== Operating envelope ==
== Operating envelope ==
These charts describe the current nominal CG configuration in clean, healthy, steady flight on [[Vieneo]]. They are calculated guides to the modeled aircraft, not flight-test clearance. Loading, engine condition, weather, configuration and available control authority can reduce the usable range.
The operating references below assume the nominal CG, healthy propulsion and clean surfaces on [[Vieneo]]. Loading, engine condition, temperature, configuration and control authority affect the achievable flight path. Maximum gross weight is not permission to ignore balance, IAS, AFT or crew/airframe loads.
 
=== Propulsion ratings and fuel ===
The ratings above apply to the upgraded E-series propulsion configuration. Each of the three engines has the stated axial rating in either forward or reverse; MN denotes meganewtons of force, not acceleration. Delivered force depends on atmospheric conditions, engine condition and power. Acceleration changes with the aircraft's current loaded mass.
 
At stabilized full axial output from all three healthy engines, main-engine propellant flow is approximately '''12,757 kg/h'''. Powered idle adds approximately '''23.6 kg/h'''; RCS use adds further consumption. In VTOL or other combined maneuvers, opposing outlets consume propellant even when their longitudinal forces cancel. The displayed total fuel flow can therefore exceed the three-engine axial reference. Maximum gross weight and fuel capacity are unchanged.


=== Hover capacity and CG ===
=== Hover capacity and CG ===
[[File:E-10 Operating Balance.png|thumb|center|1100px|Current E-10 nominal CG and sea-level hover capacity. Orange points are the wing-engine outlets; the shaded strip shows their fore/aft separation, not an approved CG envelope. Click the image for full resolution.]]
The nominal reference for these figures places the CG approximately '''0.500 m aft of the wing-nozzle midpoint''' and '''0.938 m below the wing-engine axes'''. The front wing-engine outlets are approximately '''3.286 m ahead''' of that CG and the rear outlets approximately '''2.286 m aft'''. The complete wing, tail, body and thrust balance matters; this reference point does not define an approved range for moving cargo or the CG.
 
The nominal CG is at the model origin, midway between the wing engines' front and rear outlets. Those outlets are approximately '''2.786 m forward and aft''' of the CG. The CG is about '''48.3% of the measured isolated-wing mean aerodynamic chord (MAC)'''. The complete wing, tail, body and thrust balance matters; the wing MAC percentage alone does not define a safe loading range.


For hover, both opposing outlets on each wing engine tilt downward through '''54°'''. Each outlet can supply the engine's rated output. Equal front/rear flow cancels longitudinal thrust and adds vertical thrust; the tail engine remains fixed. See [[VTOL#Engine arrangements|VTOL engine arrangements]] for transition and control behavior.
Both opposing outlets on each wing engine tilt down through '''54°'''. Equal front/rear flow cancels longitudinal thrust and adds lift; both outlets consume fuel. The aft engine stays axial during VTOL. See [[VTOL#Engine arrangements|VTOL engine arrangements]] for the controls, transition and operating limits.


Under the reference sea-level conditions, main-engine vertical thrust is approximately '''2.747 MN''', corresponding to a theoretical support mass of '''243,730 kg (537,332 lb)'''. This is a thrust ceiling, '''not permission to exceed the aircraft's maximum gross weight'''. No vertical RCS contribution or nozzle ground-effect boost is included.
The three axial engines provide approximately '''3.454 MN total in vacuum'''. Under reference sea-level conditions, their combined axial thrust is approximately '''3.183 MN'''. The wing-engine hover installation provides approximately '''3.434 MN''' vertical thrust, corresponding to a theoretical support mass of approximately '''304,662 kg (671,666 lb)'''. This is a thrust ceiling, '''not permission to exceed the 525,100.4 lb maximum gross weight'''. No vertical RCS or nozzle ground-effect contribution is included.


{| class="wikitable"
{| class="wikitable"
|+ Sea-level hover reference: healthy engines, steady still-air hover
|+ Sea-level hover reference: healthy engines, still air, nominal CG
! Loading !! Mass (kg) !! Fraction of available lift required !! Vertical thrust reserve
! Loading !! Mass (kg) !! Available lift required !! Vertical thrust reserve
|-
|-
| Dry empty || 125,909 || 51.7% || 93.6%
| Dry empty || 125,909 || 41.3% || 142.0%
|-
|-
| Full fuel, no cargo || 153,124 || 62.8% || 59.2%
| Full fuel, no cargo || 153,124 || 50.3% || 99.0%
|-
|-
| Maximum gross || 238,182 || 97.7% || 2.3%
| Maximum gross || 238,182 || 78.2% || 27.9%
|}
|}
Reserve means available vertical thrust divided by weight, minus one. The lift fraction is not a direct throttle recommendation: [[TVM]] and the propulsion allocator coordinate the engine flows. Hover equality leaves no climb or disturbance reserve, and symmetric static balance does not remove the need for attitude-control authority.
Reserve is available vertical thrust divided by weight, minus one. The lift fraction is not a direct throttle recommendation: [[TVM]] and the propulsion allocator coordinate the flows. Allow for engine response and leave control reserve. Off-center loads require unequal thrust and can reduce usable lift; no generic aft or forward CG shift is guaranteed safe.
 
At maximum gross, the E-10 has only about '''2.3%''' ideal vertical thrust reserve. A small loss of engine performance or an additional control demand can consume that margin. Reducing the load gives substantially more room for climb and disturbance recovery.
 
==== Hover capacity versus CG position ====
[[File:E-10 Hover CG Capacity.png|thumb|center|1100px|E-10 sea-level hover capacity versus CG position, with and without pitch-RCS assistance. Zero is the current nominal CG; negative positions are forward and positive positions are aft. Click for full resolution.]]
 
The '''green curve''' shows the main-engine lift ceiling while balancing longitudinal pitch without pitch RCS. The '''purple dashed curve''' includes the available pitch-RCS moment budget, but adds no vertical RCS lift. Its sloping sections reach that pitch-control limit; its flat sections reach the engine-output limit. Using the full pitch-RCS budget leaves no additional pitch-control reserve in that direction.
 
These curves explore hypothetical CG offsets; the current model uses the fixed nominal CG. The wing-MAC markers are geometric references, '''not a permitted CG envelope'''. The hover ceiling must still be reduced for climb, disturbances and control margin, and maximum gross weight remains the loading limit.
 
=== Trim and effective speed envelope ===
[[File:E-10 Trim Envelope.png|thumb|center|1100px|E-10: equivalent ND–NU trim demand and effective speed envelope, full fuel/no cargo, 0–20 km MSL. Augmentation on and off are shown separately. Click for full resolution.]]
 
The upper heat maps show the equivalent pitch-trim demand: '''blue is nose-down (ND), red is nose-up (NU)'''. Actual trim travel is '''±15°'''; the ±15° contours mark those stops. Color beyond a stop expresses unmet demand, not extra available trim. Reaching a trim stop can still leave control-column authority.
 
The lower maps separate four conditions:
* '''Green:''' steady level flight is available within the trim stops, without sustained column pressure.
* '''Amber:''' steady level flight is available, but column input is needed beyond trim alone.
* '''Purple:''' a pitch-controllable state can be calculated, but available thrust cannot sustain steady level flight at that speed. The aircraft would need to decelerate or change its flight path.
* '''Grey:''' no supported, column-controllable equilibrium was found within the sampled range. This is not a prediction of every possible transient maneuver.
 
The E-10 has no configured automatic VNE threshold. These charts use the E-11's loading-dependent 130–150 m/s IAS range as a comparison boundary; this does not establish a new E-10 speed limit.


{| class="wikitable"
=== Augmentation and fixed aft thrust ===
|+ Calculated level-flight bands with thrust augmentation ON (m/s IAS)
The aft engine's front and rear nozzles remain fixed along the aircraft's longitudinal axis during forward thrust, reverse thrust, VTOL and spaceflight. '''AUG does not tilt the aft engine'''. Pitch control uses the available RCS and aerodynamic control surfaces; their authority is finite.
! Loading !! Within trim, MSL !! Within trim, 20 km !! Including column, MSL !! Including column, 20 km
|-
| Dry empty || 80.5–104.5 || 80.3–108.2 || 62.7–104.5 || 62.4–108.2
|-
| Full fuel, no cargo || 89.5–104.1 || 88.5–107.8 || 69.6–104.1 || 69.3–107.8
|-
| Maximum gross || None in sampled range || None in sampled range || 86.4–102.7 || 86.0–107.1
|}
The bands are sampled estimates, rounded to 0.1 m/s; their precision is not an operating margin. The lower chart boundary is a wing-only Vs reference, not a guaranteed trimmed minimum speed. MSL here means free-air conditions, not weight on the landing gear.


The E-10 has no hands-off maximum-gross level-flight band in this calculation, even with augmentation on; column input is needed in the supported range. With augmentation off, neither aircraft has a hands-off level-flight band in the sampled loading cases, although column-controlled flight remains possible in parts of the range. For example, at full fuel/no cargo the E-10's augmentation-off MSL column-controlled band is approximately '''84.2–103.4 m/s IAS'''.
At full forward vacuum thrust with healthy engines and the reference CG, the main engines produce about '''4.84 MN·m''' of pitch torque, against about '''8.67 MN·m''' of pitch-RCS authority. Aerodynamic loads and additional attitude demands also use control authority; a full-thrust command is not a guarantee of trimmed flight.


=== Local static pitch response ===
=== Ascent and spaceflight ===
[[File:E-10 Static Pitch Response.png|thumb|center|1100px|E-10 local static pitch response at full fuel/no cargo. Curves cover sustainable, column-controllable states at 0, 10 and 20 km MSL. Click for full resolution.]]
Maximum gross is the loading ceiling. A viable orbital departure also requires sufficient propellant and a climb within pitch-control, IAS, AFT and occupant/airframe load limits. Hover capability alone does not establish that a departure is feasible. Monitor the DOR plan and actual flight conditions throughout the ascent.


This graph asks what happens immediately after a small increase in angle of attack while controls, thrust and RCS output remain fixed. A '''negative slope''' means the pitch moment changes toward nose-down, opposing the increase: a restoring static response. The plotted states have a restoring slope. The altitude curves lie close together at the same IAS in this model.
All three main engines provide the powered climb after the initial VTOL transition. Continuous F9 is not the high-altitude propulsion procedure. See [[Orbit#Automated ascent|DOR automated ascent]] for PARKING ORBIT and [[Orbit#Ground-to-rendezvous mission|ground RENDEZVOUS]] for an ascent followed by transfer.


Restoring response does not mean the aircraft is already trimmed, or that it will return smoothly after a disturbance. Oscillation damping, feedback behavior, inertia, stall recovery and flutter are separate questions. The calculation holds true airspeed and effective density fixed during a ±0.05° perturbation and does not retrim the aircraft.
The E-series DOR departure clears approximately 750 m AGL, builds forward speed, then uses a nominal 30° pitch target below 25 km MSL and a steeper target as wing support fades. Guidance subsequently lowers pitch to build tangential orbital speed. These are state-limited pitch targets, not a universal altitude/pitch envelope or a fixed FPA. IAS, AFT, current velocity and AP/PE remain essential. Reaching 100 km alone does not establish orbit; low station staging may require a subsequent powered transfer rather than a long unpowered coast.


=== Conditions and spaceflight use ===
'''WING OVHT''' caution is above '''125°C AFT'''; warning is above '''225°C'''. DOR plans below '''100°C''', with a '''95°C''' forecast target for managed atmospheric descent. These margins do not replace monitoring or establish a structural clearance. The E-10 has no configured VNE for the overspeed clacker. DOR uses 130 m/s as a conservative planning reference when that input is absent; this does not add an aircraft clacker limit.
The charts use the current Vieneo flight model, including sea-level density '''3.063 kg/m³''', surface pressure about '''2630 mb''', density scale height '''7.5 km''' and modeled surface gravity '''11.27 m/s²'''. They assume clean surfaces without icing, healthy propulsion and retracted gear/flaps/spoilers. Local temperature and weather affect actual flight conditions; the charts add no extra plume-ground lift.


These are atmospheric steady-flight and sea-level hover references. They do not describe ground contact, nozzle transitions, suborbital coast, [[orbit]] or [[reentry]], and they do not establish a structural or high-Mach clearance. Main-engine VTOL remains subject to the [[VTOL#Atmospheric operating envelope|separate VTOL altitude and air-relative-speed limits]]. Outside that envelope, vertical translation uses RCS; the axial main engines remain available. See [[TVM]] for velocity matching and hover controls.
These references use Vieneo's current atmosphere: surface density '''3.063 kg/m³''', surface pressure about '''2630 mb''', density scale height '''7.5 km''' and surface gravity about '''11.27 m/s²'''. Wing-engine nozzle vectoring is available at any altitude, including vacuum; power, engine condition and balance still limit the delivered thrust. See [[VTOL#Operating envelope|VTOL operating limits]]. Suborbital coast, orbit and reentry require their own guidance and energy management. No terrain/weather avoidance or automatic landing is implied.


== External Links ==
== External Links ==
* [https://docs.google.com/spreadsheets/d/1klZyVkRnXCM8qpCcghM8C3NQGWP4FI1GOc0ox-yrojw/edit?usp=sharing Detailed specifications]
* [https://docs.google.com/spreadsheets/d/1cloDgSMSADpG7jgm6WMtb2LLQzwdo_GBCONwaQvGo80/edit#gid=261026110 Shared E-series specifications]
* [https://docs.google.com/spreadsheets/d/1klZyVkRnXCM8qpCcghM8C3NQGWP4FI1GOc0ox-yrojw/edit?usp=sharing Original E-10 worksheet]


[[category:vehicles]]
[[category:vehicles]]
[[category:Aerospace Vehicles]]
[[category:Aerospace Vehicles]]
[[category:Trimbal-Kneers Aerospace]]
[[category:Trimbal-Kneers Aerospace]]

Latest revision as of 13:33, 1 November 2026

The E-10 Saint model is no longer in production. For current production line please visit E-11 Saint.

E-10 Saint Class

The official blurb: "The E-10 Saint is the flagship of the fleet. Although she is sluggish, she can take you all the way to orbit and beyond. With room for over 100 MT of cargo in her hold and standard VTOL she has all the flexibility you are looking for (if you can get past the sticker price)."

The E-10 is the first of the Explorer line of aerospace vehicles.

The E-10 is a VTOL-capable aerospace vehicle, in so far as it has conventional flight surfaces but is also capable of ascending beyond the atmosphere, maneuvering in orbit and re-entering under its own power.

The E-10 is the second cheapest aerospace vehicle available, with second-hand vessels selling for around 967,000 CR on vBay. It may be considered effectively the cheapest, as it is very uncommon to find P-13 on vBay. It also currently has the largest cargo capacity of any vehicle available on Vieneo, and as a result is by far the most popular.

Statistics

E-10 Saint — Aerospace vehicle specifications
General
Manufacturer Trimbal-Kneers Aerospace Type / role Explorer-series aerospace vehicle
Price / MSRP Not specified Availability No longer in production or available for new sales; superseded by E-11 Saint
Restrictions Not specified IVR series Not specified
Dimensions and weights
Length 48.75 m Width Not specified
Height 14.88 m (with gear) Empty / curb weight 125,909 kg (BOW)
Fuel capacity 27,216 kg (Iagreous) Payload 112,273 kg
Maximum gross / takeoff weight 238,182 kg (gross)
Capacity and equipment
Seats Not specified Passenger capacity Not specified
Cargo bays 6 Cargo capacity Not specified
Internal stowage 7 MT (Bay 0) Avionics bays 4
Weapon mounts 2 Engine count 3
Life support
Cabin pressurization Pressurized — stored breathing gas Rated pressure differential 2,400 mbar (240 kPa), cabin above surroundings
Performance
Engine / propulsion Not specified Maximum speed Depends on loading and available thrust; no single level-flight maximum specified
Normal range Indefinite (capable of reaching orbit) Endurance Not specified
Flight
Wingspan 48.75 m Effective wing area 280.104 m2 (projected wing and aileron area)
Cruising speed Varies with loading, altitude, engine condition and trim authority Service ceiling Indefinite (capable of reaching escape velocity)
Engine critical altitude Not specified Bypass ratio Not specified
Thrust 1.151211 MN per engine, forward/reverse in vacuum; 3.453632 MN total for three engines. Approximately 3.183071 MN total at reference sea level Maximum acceleration 14.50 m/s² thrust/mass at maximum gross in vacuum; before gravity and drag
VTOL capability Yes; subject to loading and balance limits Rain Protection Type Bleed air system
Flight controls and landing gear
Flight Spoilers Not specified Ground Lift Dump (GLD) Not specified
Retractable Landing Gear Not specified Landing Gear Type Not specified
Leading Edge Flaps Not specified Trailing Edge Flaps Not specified
Space operations
Orbital capability Capable of reaching orbit and escape velocity Interstellar capability Not specified
Docking / interfaces Not specified

Maximum gross weight is not a guarantee of hover or hands-off level flight. Available thrust, trim and control-column authority impose separate limits; reaching a trim stop does not mean that all pitch-control authority is exhausted. See VTOL for vertical-flight controls and limitations.

Standard Equipment

C-17 compared with the E-10

Overspeed warning

The E-10 has no specified Vne (never-exceed indicated airspeed) for the automatic overspeed clacker. The performance speeds above are not clacker thresholds. A silent clacker does not indicate protection against every speed, heating or structural hazard.


On vehicles with a configured Vne, the warning compares indicated airspeed (IAS) with the current limit, including any modeled weight, gear, door and flap adjustments. It repeats while IAS is above the limit and stops on the next audio update when IAS is at or below it, or either speed input becomes invalid. It can re-arm after recovery and follows the current condition after cockpit or audio reloads. Cockpit airspeed is displayed in m/s.

Power and shutdown: the automatic clacker requires avionics power. It stops when the overspeed condition ends, valid speed or power data is unavailable, or avionics power falls below the VMU cutoff during shutdown. Restoring power re-arms it only while a valid positive Vne is exceeded.

This rule applies through ground operation, VTOL/hover, atmospheric flight, ascent, suborbital coast, orbit and re-entry. It uses IAS rather than true airspeed or orbital velocity, with no additional altitude cutoff or Autoflyte-dependent threshold. The automatic clacker is separate from the queued spoken GPWS alerts.

Operating envelope

The operating references below assume the nominal CG, healthy propulsion and clean surfaces on Vieneo. Loading, engine condition, temperature, configuration and control authority affect the achievable flight path. Maximum gross weight is not permission to ignore balance, IAS, AFT or crew/airframe loads.

Propulsion ratings and fuel

The ratings above apply to the upgraded E-series propulsion configuration. Each of the three engines has the stated axial rating in either forward or reverse; MN denotes meganewtons of force, not acceleration. Delivered force depends on atmospheric conditions, engine condition and power. Acceleration changes with the aircraft's current loaded mass.

At stabilized full axial output from all three healthy engines, main-engine propellant flow is approximately 12,757 kg/h. Powered idle adds approximately 23.6 kg/h; RCS use adds further consumption. In VTOL or other combined maneuvers, opposing outlets consume propellant even when their longitudinal forces cancel. The displayed total fuel flow can therefore exceed the three-engine axial reference. Maximum gross weight and fuel capacity are unchanged.

Hover capacity and CG

The nominal reference for these figures places the CG approximately 0.500 m aft of the wing-nozzle midpoint and 0.938 m below the wing-engine axes. The front wing-engine outlets are approximately 3.286 m ahead of that CG and the rear outlets approximately 2.286 m aft. The complete wing, tail, body and thrust balance matters; this reference point does not define an approved range for moving cargo or the CG.

Both opposing outlets on each wing engine tilt down through 54°. Equal front/rear flow cancels longitudinal thrust and adds lift; both outlets consume fuel. The aft engine stays axial during VTOL. See VTOL engine arrangements for the controls, transition and operating limits.

The three axial engines provide approximately 3.454 MN total in vacuum. Under reference sea-level conditions, their combined axial thrust is approximately 3.183 MN. The wing-engine hover installation provides approximately 3.434 MN vertical thrust, corresponding to a theoretical support mass of approximately 304,662 kg (671,666 lb). This is a thrust ceiling, not permission to exceed the 525,100.4 lb maximum gross weight. No vertical RCS or nozzle ground-effect contribution is included.

Sea-level hover reference: healthy engines, still air, nominal CG
Loading Mass (kg) Available lift required Vertical thrust reserve
Dry empty 125,909 41.3% 142.0%
Full fuel, no cargo 153,124 50.3% 99.0%
Maximum gross 238,182 78.2% 27.9%

Reserve is available vertical thrust divided by weight, minus one. The lift fraction is not a direct throttle recommendation: TVM and the propulsion allocator coordinate the flows. Allow for engine response and leave control reserve. Off-center loads require unequal thrust and can reduce usable lift; no generic aft or forward CG shift is guaranteed safe.

Augmentation and fixed aft thrust

The aft engine's front and rear nozzles remain fixed along the aircraft's longitudinal axis during forward thrust, reverse thrust, VTOL and spaceflight. AUG does not tilt the aft engine. Pitch control uses the available RCS and aerodynamic control surfaces; their authority is finite.

At full forward vacuum thrust with healthy engines and the reference CG, the main engines produce about 4.84 MN·m of pitch torque, against about 8.67 MN·m of pitch-RCS authority. Aerodynamic loads and additional attitude demands also use control authority; a full-thrust command is not a guarantee of trimmed flight.

Ascent and spaceflight

Maximum gross is the loading ceiling. A viable orbital departure also requires sufficient propellant and a climb within pitch-control, IAS, AFT and occupant/airframe load limits. Hover capability alone does not establish that a departure is feasible. Monitor the DOR plan and actual flight conditions throughout the ascent.

All three main engines provide the powered climb after the initial VTOL transition. Continuous F9 is not the high-altitude propulsion procedure. See DOR automated ascent for PARKING ORBIT and ground RENDEZVOUS for an ascent followed by transfer.

The E-series DOR departure clears approximately 750 m AGL, builds forward speed, then uses a nominal 30° pitch target below 25 km MSL and a steeper target as wing support fades. Guidance subsequently lowers pitch to build tangential orbital speed. These are state-limited pitch targets, not a universal altitude/pitch envelope or a fixed FPA. IAS, AFT, current velocity and AP/PE remain essential. Reaching 100 km alone does not establish orbit; low station staging may require a subsequent powered transfer rather than a long unpowered coast.

WING OVHT caution is above 125°C AFT; warning is above 225°C. DOR plans below 100°C, with a 95°C forecast target for managed atmospheric descent. These margins do not replace monitoring or establish a structural clearance. The E-10 has no configured VNE for the overspeed clacker. DOR uses 130 m/s as a conservative planning reference when that input is absent; this does not add an aircraft clacker limit.

These references use Vieneo's current atmosphere: surface density 3.063 kg/m³, surface pressure about 2630 mb, density scale height 7.5 km and surface gravity about 11.27 m/s². Wing-engine nozzle vectoring is available at any altitude, including vacuum; power, engine condition and balance still limit the delivered thrust. See VTOL operating limits. Suborbital coast, orbit and reentry require their own guidance and energy management. No terrain/weather avoidance or automatic landing is implied.

External Links

Retrieved from "https://www.risetvp.com/index.php?title=E-10_Saint&oldid=5363"