Aim
- Profile 6, no chute, to measure drag in the range 200-500 mph.
Run Details
- Track 21, Km 0.5
- 30C, 925 mb, sunny. Wind SSW, 8G13 mph.
- Fuel full.
- 9 miles run.
Run 28 – HST 7
- 0910 local. Engine start 51 sec with a light head wind. 13:00 run time inc. 5 min cooldown. AMAD peak temp 107C.
- Right brake temp indicating full scale before run, settled down during accel, then full scale again during the decel.
- Car generally directionally stable throughout the run.
- Centre screen freeze at 390 mph during accel. Run continued on left screen readout, cross-checked with backup GPS/clock. Screen came live again during decel.
- Throttle back at ~475/480 mph, peak speed 491 mph.
- Brakes on at 200 mph/30 Bar, Car slow-speed at Km 11.5, just short of prediction. Max brake temp (left hand side only) 210C.
- Car driven to end of track, turned under its own power to stop into wind.
- At shut down, Mach No still reading M = 0.11.
- Comms at Km 16 are noticeably less good than further north.
- Second run cancelled. Minor bodywork damage to the rear left delta again.
Summary
Successful profile 6 (no chute). The Car felt more stable laterally, possibly due to the lighter winds. The centre screen failure increases the cockpit workload significantly – while it is manageable (that’s what the backup sources are for….) it should be fixed if possible.
Procedural Points
- Conditions (wind, temp) may be more favourable with an earlier start.
Technical Points
- Centre screen failure.
- Right brake temp intermittent.
- Leading corners of rear deltas showing impact damage from front wheel debris.
