Aim
- Profile 7, 550 mph. Test modified chute (150lb tie) and brake grip limit.
Run Set-up
- Track 19, Km 0.5
- 24C, 929 mb, sunny. Wind 12 o/c 3-6 mph.
- Fuel full.
- 4 miles run.
Run Details
- 0940 local. Engine start 52 sec with a light head wind. 4:40 engine run time, emergency shutdown. AMAD peak temp 50C.
- Car stable throughout the run.
- Intermittent eng bay overheat (‘Fire’) caption came on at ~450 mph, throttle closed, peak speed 481 mph.
- Chute 1 (150 lb tie) at ~440 mph. Video indicates canopy dump despite stronger tie.
- Brakes on at 160 mph/40 Bar, gradually increased a couple of times to 50 Bar. Possible indications (it’s hard to tell with a 6 tonne jet Car) of minor wheel skid just below 50 Bar, with wheel tracks appearing to support this assessment.
- Car stopped after 5.4 miles run. Max brake temp (left hand side only) 175C.
- Fire (overheat) caption still flickering after Car stopped. Engine emergency shutdown, caption extinguished immediately.
Summary
Run aborted at 481 mph due to flickering eng bay overheat caption. Another successful chute deployment, albeit with canopy dump still evident. Apparent wheel grip limit now established for future runs.
Procedural Points
- Nil
Technical Points
- Chute canopy dump.
- Dust in the cockpit is becoming a problem, with a visible film building up on the canopy during the run. Further dust mitigation is required for future runs.
- Max brake pressure 45 Bar to avoid wheel skid.
