FLIGHT 2-32-55
June 25, 1964
Pilot - L/C R. Rushworth
FLIGHT RESUME
Launch: Hidden Hills
#2 on magnetic heading 227°, SAS Hi-Lo-Hi (8-4-8), ASAS ARMED, heading
vernier (Standby) both BCS "OFF", RAS "OFF", ventral off. Launch point
coordinates: 35° 58' N' 115° 39' W.
1. Launch, light engine, increase to 100% T. Rotate at 10°a (»1.8g) until q = 20°.2. q = 20°. Maintain q = 20°.
3. Extend speed brakes to 35°.
4. Pushover to zero g. (H-dot » 800 fps).
5. Shut down, retract speed brakes, increase a to »4° to maintain 80,000 ft.
6. Disengage ASAS, Yaw and Roll dampers "OFF", perform rudder pulse. Roll "Lo," Yaw "Hi".
7. Pitch damper to low gain (4), perform pitch pulse.
8. Pitch damper "OFF", perform pitch pulse. Pitch damper "Hi".
9. Set up rate of descent of »250 fps.
10. Yaw and Roll dampers "OFF", perform rudder pulse. Roll "Lo", Yaw "Hi".
11. Pitch damper "OFF", perform pitch pulse. Pitch damper "Hi".
12. Cuddeback, extend speed brakes to 35°, increase rate of descent to »400 fps.
13. Yaw and Roll dampers "OFF", perform rudder pulse. Roll "Lo", Yaw "Hi".
14. Pitch damper "OFF", perform pitch pulse. Pitch damper "Hi", ARM SAS, vector to High Key, speed brakes as required.
15. High Key.
I. PRELAUNCH
AND LAUNCH PHASE
2. X-15 radios - They were good during this portion.
3. APUs - O.K.
4. Damper System - It was normal and we got a good check.
5. Flow Direction Sensor - a and b appeared normal.
6. Launch Transients (q, f, y) - I did have a large transient in roll at launch. I didn't do anything in yaw. Pitch, I just pulled the airplane up and trimmed it from where I was to 5° angle of attack. (How was your controllability?) In pitch 1-1/2. I didn't do anything in yaw and although I got some sideslip as I came up in roll it wasn't any problem there. Controllability I'd probably rate about 2-1/2 in that sense.
7. Launch Space Positioning - O.K.
8. Engine Start - O.K.
9. Unforeseen Incidents - None.
2. q Control - It was real good except that I ran out of trim as expected. I was at full back trim and if I had to go to 30° of q I would have had to pull back on the stick.
3. Altitude Profile Versus Simulator - The altitude profile appeared to be very much the same as the simulator. Apparently I was getting to speeds sooner in the airplane and there was apparently an error in the system. I was getting my speed conditions about 100-200 fps before altitude and time.
4. Unforeseen Incidents - None
2. Controllability following each pulse maneuver - The first pulse I did at 4200 fps with speed brakes in, ASAS off, yaw off, and roll off, and hands off. I did a left rudder pulse and after 1-1/2 cycles I was 120° over on my back. The damping was pretty much as I expected and I just grabbed the stick and rolled it up level. The controllability was much better than I expected. Roll damping seemed to be a little bit better for putting in controls without the damper. I put the dampers back on then.
During the oscillations
from the pulse, of course, roll was way out of trim and I'll rate it at
about 2-1/2 in roll. (How about yaw?) I didn't make any control inputs
in yaw, but it didn't seem too bad either. It was a steady state thing
as I rolled around, no problem at all. (Did you have any trouble getting
trimmed up to your angle of attack?) No, I was carrying, during this portion
of it, 1/2° to 1° less angle of attack then what I expected. I
was closer to 3° than 4°. Then, because I had gotten an altitude
callout at this time that I was going low and I knew I must be going low
because I rolled so far over, I pulled it on up to 5° and it seemed
the rate of climb went right up to O and held there so I just left it all
the way. The next series of pulses will be in pitch with the pitch damper
at low. All the other dampers on normal. I'd rate that about 2-1/2 in pitch.
(Is this controllability now?) No, this is just damping. Then another pitch
pulse, damper off. I'd rate that about 3 in pitch. The damping with the
pitch damper on low seemed to be less damped than the simulator. With the
damper off it seemed to be as good or better than the simulator. I could
give you a controllability rating there in pitch of about 2-1/2. I didn't
think there would be much problem over all. It wouldn't be too hard to
control 1-1/2 on both roll and yaw. Incidentally, all through the burning
portion I didn't see any yaw oscillations at all as we have some other
times. Once in a while we get steady state oscillations, small ones. (Due
to this roll residual?) No, cause I was fighting roll all the way. The
second pulse in sideslip would be at about 3600 fps. I was holding against
the roll out of trim and I don't think there will be any stick motions
in there until I've gone 2 or 3 cycles. It looked just like the simulator
or a little bit better. I would say the airplane was a little more stable.
Maybe the q was a little less. I was trying to hold it steady but I had
to put in some left roll input to hold it steady. I don't think there are
any inputs in there. With speed brakes out I did another pulse and it was
normal and very much like the simulator. That must have been around 3,000
fps. I would rate it about 2-1/2 in roll and yaw and 1-1/2 in pitch. Then
I turned roll damper and yaw damper back on. The next one was at 2,600
fps with pitch damper off. I gave it a pretty good pulse and let it go.
It was normal and looked good. I'd rate that one about 2-1/2 in pitch.
Roll and yaw were about 1-1/2, the dampers were on. I did one more sideslip
pulse, I think, with speed brakes out and one more sideslip pulse with
the speed brakes in or with the speed brakes at 20°, I can't remember
which. I may have done them both. I'd rate them all about 2 1/2 with dampers
off. Everything looked normal and like the simulator. Then I did the dampers
all on, hands off roll and I got a right roll of 10-11°. I just let
it go hands-off and see what it was going to be. Dampers on was no problem
pulling it back. I'd rate it 1-1/2 in pitch, roll, and yaw.
1. | 4.3 | 3 | 4 | 3 | 1.5 | 2.5 | 2.5 | |
2. | 4.25 | 1 | 4 | |||||
3. | 4.06 | 6.3 | 2.5 | 2.0 | 1.5 | 1.5 | ||
4. | 3.90 | 5 | 3.0 | 2.5 | 1.5 | 1.5 | ||
5. | 3.55 | 5 | 1.5 | 2.5 | 2.5 | |||
6. | 3.14 | 3 | 1.5 | 2.5 | 2.5 | |||
7. | 2.84 | 2.5 | 1.5 | 1.5 | ||||
8. | 2.50 | 4 | 2.5 | 2.5 | 2.5 | |||
9. | 2.15 | 5.5 | ||||||
10. | 1.98 | 6 | ||||||
11. | 1.28 | 4 | ||||||
12. | 0.81 | 4 | 2 | |||||
13. | 0.56 | 9.2 |
4. Controllability during the approach and landing -
q 1 1/2 , f 2 , y 1 1/2 .
Controllability during the approach and landing I'd rate as shown above.
5. Unforeseen
Incidents - The out of trim in roll.
q 1 1/2 , f 2 1/2 , y 2 1/2 .
The most adverse piloting task was during the out of trim, damper off, roll condition. (The first pulse?) Yes, and I have already rated that as shown above.