Aim
- Profile 2: Jet CPU reset, then 200 mph at max dry, with coast down to 100 and gentle braking to stop.
- Profile 3: max reheat to 350 mph, coast down to 200 mph, ESD and coast down to stop.
- Explore cross wind limit in gusty conditions.
Run Details
- Track 24, Km 16.
- Weather 17C, 927 mb, sunny. Wind SW 12-15G20 mph.
- Fuel 57% to 16% indicated. 13:30 run time (4:30 + 9:00).
Run 23 – HST 2
- 1000 local. Engine start facing into wind, good start @ 52 sec.
- Jet CPU reboot test completed successfully. ESD and complete reboot (in correct order) regained all cockpit indications.
- 1015 local. Second start quicker @ 42 sec.
- Car rolled at 53-54NL on hard surface at southern end of track.
- Speedo working and cross-checked with GPS/clock indications.
- Max dry accel to 170, peak at 190 mph. Car noticeably responding to crosswind gusts, with tendency to yaw into the wind, suggesting healthy positive yaw static margin at slow speeds.
- Brakes on at 100 mph, 25 Bar, brake to a stop at Km 12. Minimal indications on brake temp during decel, temp subsequently rose to ~100C.
Run 24 – HST 3
- 1020 local. First max reheat accel. Plan to lift off at 300 to allow for throttle over-swing, but lifted a little early at 290 mph due to gusty crosswinds.
- Good accel performance, peak speed of 334 mph in just under 20 sec.
- Crosswind effects still noticeable at 300+ mph, with gusts causing a minor ‘weave’, controlled with steering inputs of 20-30 deg, mostly to counter weather-cocking, as previous run.
- ESD at 200 mph to measure rolling resistance without jet thrust.
- Car rolled to a stop at Km 5.
- AMAD temp not above 100C.
Summary
Two good runs. Car generally handled well but was occasionally working hard in the gusts. Braking limit still to be established once sensor work complete, but otherwise the profiles achieved all objectives.
Procedural Points
- Based on these tests, crosswind limit for further runs in the HST configuration is recommended as 12-15 mph.
Technical Points
- Fuel indications still under-reading – a fix is in hand.
