Images for FluxBB

[tahanson43206]

These are results of the extendedMerlin run through 4 seconds.

Plot of thrust

thrust_over_time.png (35.78 KiB) Viewed 47 times

Engine pressure

20251106EngineAt4-Pressure.png (26.47 KiB) Viewed 47 times

Engine Temperature

20251106EngineAt4-Temperature.png (56.11 KiB) Viewed 47 times

Engine Velocity

20251106EngineAt4-Velocity.png (98.3 KiB) Viewed 47 times

Intake pressure

20251106IntakeAt4SecondsPressure.png (11.18 KiB) Viewed 46 times

Intake Temperature

20251106IntakeAt4SecondsTemperature.png (10.2 KiB) Viewed 46 times

Intake Velocity

20251106IntakeAt4SecondsVelocity.png (11.86 KiB) Viewed 46 times

[tahanson43206]

These images show the status of the extendedMerlin engine at 3.75 seconds

Velocity

20251106VelocityAt3-75Seconds.png (96.54 KiB) Viewed 46 times

Temperature

20251106TemperatureAt3-75Seconds.png (75.28 KiB) Viewed 46 times

Pressure

20251106Pressureat3-75Seconds.png (25.33 KiB) Viewed 46 times

Velocity

20251106IntakeVelocityAt3-75Seconds.png (11.83 KiB) Viewed 46 times

Temperature

20251106IntakeTemperatureAt3-75Seconds.png (10.25 KiB) Viewed 46 times

Pressure

20251106IntakePressureAt3-75Seconds.png (11.14 KiB) Viewed 46 times

[tahanson43206]

This image shows thrust over the entire run from .64 through 3.75 seconds.
The plot seems to show gas escaping from the system due to heating at start up.
We are still waiting to see where the thrust will level off as new hydrogen arrives.

thrust_over_time.png (35.38 KiB) Viewed 40 times

[tahanson43206]

Plot of thrust from 3.25 seconds to 3.5 seconds...

Looking for leveling off but it is not yet

thrust_over_time.png (33.06 KiB) Viewed 39 times

[tahanson43206]

These images were prepared by GW Johnson:

rough field starship.png (93.13 KiB) Viewed 37 times

Rough Field Starship

roads to hold loads.png (32.86 KiB) Viewed 37 times

Roads to hold loads

blue ghost lander.jpg (117.65 KiB) Viewed 37 times

Blue Ghost Lander

[tahanson43206]

This plot shows thrust from the extendedMerlin model over 3.25 seconds of simulated run time:

thrust_over_time.png (44.51 KiB) Viewed 37 times

[tahanson43206]

The six images at the links below show the status of the engine and the intake after 3 seconds of operation.

The model is extendedMerlin (using SpaceX original Merlin engine as the design anchor).
Flow rate is 2 kg/s after 2 seconds
Gas is hydrogen at 300 Kelvin
Power input is 40 MW but heat transfer is poor
Heat is on at the beginning of the run.

Intake showing pressure:

20251026IntakePressureAt3Seconds.png (10.93 KiB) Viewed 39 times

Intake showing Temperature:

20251026IntakeTemperatureAt3Seconds.png (10.63 KiB) Viewed 39 times

Intake showing Velocity:

20251026IntakeVelocityAt3Seconds.png (11.93 KiB) Viewed 39 times

Engine showing pressure:

20251026EnginePressureAt3seconds.png (20.69 KiB) Viewed 39 times

Engine showing Temperature:

20251026EngineTemperatureAt3Seconds.png (45.31 KiB) Viewed 39 times

Engine showing Velocity:

20251026EngineVelocityAt3Seconds.png (71.16 KiB) Viewed 39 times

(th)

[kbd512]

Test

LC-Lot-9827-1.jpg (230.44 KiB) Viewed 170 times

[tahanson43206]

These images show the status of the extendedModel after a short run of 9 hours from 1 second to 1.25 seconds

Engine Pressure

20251020EnginePressure.png (16.99 KiB) Viewed 2183 times

Engine Temperature

20251020EngineTemperature.png (40.35 KiB) Viewed 2183 times

Engine Velocity

20251020EnginePressure.png (16.99 KiB) Viewed 2183 times

Intake Pressure

20251020EnginePressure.png (16.99 KiB) Viewed 2183 times

Intake Temperture:

20251020EngineTemperature.png (40.35 KiB) Viewed 2183 times

Intake Velocity

20251020EngineVelocity.png (47.7 KiB) Viewed 2183 times

[tahanson43206]

This image was contributed by GW Johnson

equations.jpg (88.03 KiB) Viewed 2302 times