X-15 FLIGHT REQUEST




Flight No.: 1-26-45 Date : 4/11/62

Pilot: J. A. Walker

Subject of Test: Evaluation of ASAS and 20° a stability

Airplane Configuration: Basic X-15

Launch: Mud Lake on a magnetic heading of 177°, ASAS "Armed"
 
 
 No. Time Alt V a  Event
           
1. 0 45 790 - Launch, light engine, increase to 100% thrust, rotate to 10° a
           
2. 21 47 1700 10 Maintain 10° a until q = 30°, maintain q = 30°.
           
3. 35 58 2250 4 Pushover to 0 g.
           
4. 75 95 5100 0 Increase a until g = 1.5 (a » 8°)
           
5. 83 100 5900 8 Burnout - increase a to 20°
           
6. 100 112 5500 20 Perform da pulse if no b oscillation is experienced.
           
7. 123 135 5100 20 Disengage roll SAS
           
8. 126 138 5000 20 Extend speed brakes, trim to dh = -25
           
9. 159 153 4600 20 Peak altitude (q » 36 psf), roll to 15° bank using reaction controls, maintain a, b, f for 20 seconds.
.          
10. 190 140 4500 16 Retract speed brakes
           
11. 205 135 4500 10 Reset SAS decrease a to 5°
           
12. 215 115 4600 5 Perform a pullup - pushover (a = 5-20-0) perform da step input at a = 20°
           
13. 233 92 4000 0 Perform a pullup-pushover (a = 0-20-10) 5 g maximum, perform dv step input at a = 20°, disengage roll SAS at a = 12°.
           
14. 258 78 3600 10 Reset SAS, perform 30° left bank turn, evaluate handling qualities make turn at 0°, -5°, -10° a increments.
           
15. 280 75 3000 5 Perform 30° right bank, space positioning turn at 0-5-10° a increments.
           
16.         Vector to high key for landing, start jettison, H2O2 off.
           
17.         Check ventral armed, pressure tanks

18. Before APU shutdown, cycle controls, retract flaps, set stabilizer trim to zero, push-to-test ball nose, data OFF.

Notes:

l. Duration of flight approximately 11 minutes

2. Emergency lakes - Grapevine and Cuddeback

3. q vernier will be set at 30°, a null will be set at 20

 Ground rules for no launch: 1. Malfunction of any SAS channel

2. Malfunction of inertial platform altitudes

3. Malfunction of hot nose

4. Malfunction of microwave.

 Alternate situation after launch: 1. If engine light cannot be affected within 30 seconds, jettison propellants and land at Mud Lake.

2. For delayed engine light add 5 seconds to pushover time and 5 seconds to pullup (75 sec) time.

3. If radar or radio fail proceed as planned.

4. For inadvertent engine shutdown prior to 35 sec, return to Mud Lake, 35-60 sec. proceed to Grapevine, 60-65 sec proceed to Cuddeback , 65 seconds or more proceed to Rogers. Two engine starts may be attempted at any time.

5. For yaw damper failure do not increase a above 15°.

6. For total pitch or roll damper failure proceed to Rogers do not increase a above 12.°.

7. For ball nose failure maintain 2 g until q = 30°,. pushover at 35 seconds proceed to Rogers. Make ASAS checks during deceleration:.

8. For attitude failure, maintain 1.5 g until 40 seconds, pushover to 0 g proceed to Rogers, make ASAS checks during deceleration.