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- Type: SPH
- Style: spaceplane
- Part Count: 68
- Mods: 2
- Squad (stock)
An efficient Skylon inspired SSTO called Perseus MK1.
Built in the SPH in KSP version 0.25.0.
Climb to around 10 km before breaking Mach 1, then steadily climb up to 20 km while building up speed. after Mach 4.5 climb up to 22 km and hit 7 to switch central engine to rocket mode. Try to keep the AOA low while still climbing and above mach 4.8-9 hit 9 to close air intakes, so the other two engines will go into rocket mode. Burn prograde until the apoapsis is above 80 km, and keep engine burning at low thrust to counteract drag. Circularize orbit as normal upon reaching apoapsis.
Pump fuel to nose of the plane from the lateral tanks. Lower periapsis as desired. Point prograde upon reentry and maintain low AOA to prevent loss of control. Open air intakes with 9 and switch engines back to air breathing mode with 0. Fly as you normally would after dropping below 10 km and Mach 1. Try not to go above 8 degrees AOA to not lose control.
If you lose control at any time, press space. This will engage the parachutes, once the parachutes cause the plane to point prograde, engage thrust and pull up carefully while maintaining a low AOA. Press 8 to cut parachutes and fly as you would normally.
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