According to Twitter user @mlaughlin there is another WK2/SS2 test flight taking place right now. There have been persistent rumours that a drop test of SS2 is imminent, but it is unknown whether it will take place on this flight.
UPDATE: No SS2 drop occurred on this flight. It was later reported in SS2 test logs as Captive Carry Flight 3, a drop test simulation run in preparation for independent SS2 flights. It was the first captive carry flight with the SS2 manned with a test crew.
Objectives achieved. Pilots in SS2 evaluated the systems and procedures for the upcoming glide flights. A simulated SS2 mission was flown from release down to low approach. Performed low approach then full stop on Runway 30.
SS2 mission practice
Low fuel evaluation
Window fog evaluation
All objectives achieved. Climed to 51,500 ft and the ECS performed flawlessly. Flew cross-country to descend over the Pacific to evaluate window fogging. Upon return to the desert, performed controls evaluation which showed good positive control with power loss. Performed "roller coasters" (45° climb, low g pushover followed by 30° nose low dive) to evaluate low fuel states. Touch and goes were uneventful. Full stop landing on Rwy 26.
Monday was a great milestone for the team. We performed five tests from 25 to 60 mph with two different pilots. All objectives were achieved. They were: condition the brakes and evaluate the landing gear/brake steering/skid shoe performance and general ground handling. The vehicle performed as expected and we're excited to move into the manned phase of the test program.
SS2 pressurization evaluation
SS2 electrical system evaluation
SS2 avionics performance evaluation
Post-Flight cold soaked systems testing
All objectives achieved. SS2 was pressurized and powered from the mothership in flight. Peak altitude was 51,000 ft which allowed for a long cold-soak to evaluate the robustness of the hardware. A simulated Spaceship decent/glide mission was made from altitude to high key. Several approaches followed for pilot training/proficiency.
Perform fourth full scale flight design RM2 hot-fire – planned flight fuel
Performed flight design Rocket System evaluation
Pressurization system evaluation
Data Acquisition system evaluation
Fuel formulation evaluation
CTN structural evaluation
All objectives completed. Performed successful hot-fire, including oxidizer flow and pressurization systems, data acquisition system measurements, structural evaluation, nozzle ablation, and fuel regression rate data collection. Determined stability levels.