12 minutes to launch
 

B-52:	We're getting a little leak out the right BCS nose, Jack.
Engle:	Precool off.
B-52:	10 minutes.
Engle:	APU cooling switch to normal.
Russel:	LN2 off.
Engle:	Both blowers BLN2. Pressure cooling on.
B-52:	Mag heading 027. Attitudes looking good. Inertial velocity reading about 800.
NASA 1:	Roger.
Engle:	Cabin source about 3100, Bob.
NASA 1:	Roger.
B-52:	9 minutes.
Engle:	Helium shutoff valve coming open.
B-52:	Start turn at 8 minutes?
NASA 1:	Affirmative.
Engle:	Data on. #2 APU coming on. No hydraulics yet, there they go. #1 coming on.
Chase:	#l started.
Engle:	Generators reset. Engine reset.
B-52:	8 minutes.
Engle:	Both hydraulic pressures about 3500. Electric power looks good. Controls and flap check. Flaps coming down.
Chase:	Flaps coming down.
Engle:	They're up.
Chase:	Up.
Engle:	C/B's are in, data is off.
NASA 1:	Roger, keep going, Joe.
Engle:	Mixing chamber temps, -45 and -50. a and b look good, Bob. a about 1, b just a hair off to the left.
NASA 1:	Roger. 003, new launch heading will be 215.
B-52:	215, Roger. 7 minutes.
Engle:	Aux cabin pressure switch coming on.
Chase 1:	You're dumping fuel, Joe. NASA 1, do you read Chase l?
NASA 1:	Affirmative.
Chase 1:	He's dumping ammonia ......
NASA 1:	You're not coming through clear, repeat your transmission.
Chase 1:	He's dumping fuel at the present time.
NASA 1:	Roger. Go to pressurize, Joe.
Engle:	Roger, going to pressurize.
NASA 1:	Topoff complete?
Engle:	Fire extinguisher to auto.
Chase:	.....
B-52:	6 minutes.
Russel:	LOX topoff was in overflow condition when he went to pressurize, looks good.
NASA 1:	Roger, thank you. Joe, we will delete the jettison check.
Engle:	SAS check complete. Hi-lo-hi. Alternate SAS is armed. How's the horizontal stabilizer position?
Chase:	... zero.
Engle:	Very good.
NASA 1:	We'll call the 5 minute, Charlie.
B-52:	OK.
NASA 1:	And the 4 minutes. 003, you're 5 minutes now, we'll call the 4.
B-52:	Roger 5.
Engle:	X-15 oxygen 2600. Cabin altitude 3550.
NASA 1:	Roger. You got a good SAS check and you got hi-lo-hi?
Engle:	Affirm.
NASA 1:	Did you get my call that we will not do an in-flight jettison?
Engle:	Affirm.
B-52:	Steady on 215.
NASA 1:	Standby for 4 minutes. 4 minutes now.
B-52:	Roger 4.
Engle:	Data on, calibrate, tank handle is in pressurize.
NASA 1:	Roger, you can turn data off.
Engle:	Data off?
NASA 1:	Affirm. Jettison switches are jettison?
Engle:	Lox and ammonia jettison switches are jettison, negative jettison check.
NASA 1:	Roger. What are your mixing chambers now?
Engle:	-40 on #1 and -50 on #2.
NASA 1:	Very good.
Engle:	Intercom switch going off. How do you read on radio?
NASA 1:	Read you loud and clear. How me?
Engle:	Very good.
Chase:	All control surfaces are zero.
Engle:	OK, thank you.
B-52:	3 minutes.
NASA 1:	Roger, 3 minutes. Give us a set of tank pressures, Joe.
Engle:	Lox reading 62 and ammonia 45. Velocity is about 770 now.
NASA 1:	Roger.
Engle:	My heading is 215. APU bearing temps about 80 on #l and 50 on #2.
NASA 1:	Roger, blood pressure on?
Engle:	It's on.
B-52:	2 minutes.
Engle:	Data on, tape to 15. Push to test ball nose.
Chase:	You moving the stick, Joe?
Engle:	Yes, just did. Good check on the ball nose. a is about l/2-1° and b just about on center. Cine camera pulse.
Russel:	Joe are you getting any vent .......... on your lox tank?
Engle:	Roger.
NASA 1:	We're observing that and we will call l minute. Altitude switch on, Joe?
Engle:	Roger on alt.
NASA 1:	Roger, l minute now. You can start your prime, ready light, precool cycle now.
Engle:	OK, going prime now.
NASA 1:	Precool?
Engle:	Ready and precool. Igniter idle.
NASA 1:	Everything looks good.
B-52:	40 seconds.
NASA 1:	Roger, and hold your pump until 10 seconds, you're on the checklist.
Engle:	Reading 44 on the altimeter, 10 seconds, pump idle.
Chase:	Pump idle.
Engle:	Chamber 175, looks good. 3, 2, l drop.
Chase:	Good light.
NASA 1:	Roger, we have good light, Joe. Track and profile look good. Nudge the throttle forward a little bit, Joe.
Engle:	It's all the way, Bob.
NASA 1:	Roger. On theta. Good track. Standby for pushover. 65, just a little bit steep, Joe. Little bit steep at 80,000. 90,000 and 4,000. Profile is good, you're matching profile. 100,000, standby for shutdown.
Engle:	About 52 or 60 before it finally quit.
NASA 1:	Roger. Very good profile, track is good. Coming up on peak at 113.
Engle:	Roger. Speed brakes coming out.
NASA 1:	Speed brakes at 20. Watch your H dot, Joe.
Engle:	Roger ......
NASA 1:	10° a.
Engle:	OK, coming up .......
NASA 1:	On profile, on track. Roger, come up on H dot. Have you about 41 now, pull it up. Profile is looking good.
Engle:	Pushing over, sure getting a lot more pitch oscillation than showed up in the simulator.
NASA 1:	Roger.
Engle:	Coming up on 10 again.
NASA 1:	Roger. You're going to be north of track, Joe.
Engle:	Very good, I've got the field in site.
NASA 1:	Roger.
Engle:	Make a little turn here, coming up.
NASA 1:	Roger. Check your H dot. We're just a little bit behind on speed, Joe. Track and profile are good. Get your H dot. Speed brakes in. You're coming through 85,000 and get your q down.
Engle:	Roger.
NASA 1:	Watch your H dot.
Engle:	OK, pushing over.
NASA 1:	Roger. Little bit behind on speed now. We have you 50 miles now, what speed are you showing?
Engle:	I'm showing 2800 now and about 88,000.
NASA 1:	Roger.
Engle:	OK, get my center stick .......... here, coming back on with the dampers.
NASA 1:	Roger. Check all your dampers, Joe.
Engle:	Roger, they're all on.
NASA 1:	OK you're abeam Cuddeback, got the field in site?
Engle:	Roger. Russ, I'm below 1 o'clock, little high.
Chase:	Roger, don't have you yet, Joe.
NASA 1:	Got you at 65,000 now.
Engle:	Roger. Little speed brakes.
NASA 1:	Little speed brakes.
Engle:	About your 12:30, Russ.
Chase:	Roger .......
NASA 1:	You're right on profile, Joe.
Engle:	OK. 1 o'clock now, Russ.
NASA 1:	Looks good, Joe. About .......... at 41,000.
Chase:	Has tally ho!
Engle:	Rog, 350 indicated.
NASA 1:	Go to jettison anytime, Joe.
Engle:	OK, speed brakes coming in and going jettison. Getting little bit of buffet at 1.2 'g', 300 knots. Engine master off. SAS disengaged.
Chase:	Still jettisoning.
Engle:	More speed brakes.
NASA 1:	Watch your angle of attack, Joe. You still have a little pitch oscillation?
Engle:	Roger that's affirm. Pitch is still engaged. Alt SAS .......
NASA 1:	Roger.
Chase:	Still jettison a little bit. 20,000.
Engle:	Thank you. Speed brakes in.
NASA 1:	Go to pressurize.
Engle:	Pressurize.
Chase:	13. Everything looks good in the outside.
Engle:	OK, I've got speed brakes parked just a tad out here, I'll bring them in over the highway, in fact, coming in with them now. .......... pitch. Flaps coming down.
Chase:	Coming down.
Engle:	And the gear.
Chase:	2 mains and the nose gear good.
Engle:	Very good.
Chase:	5, 2, 1 beauty!
Engle:	Heading 190. Inertial height about -200. Vertical velocity -60 ft. Inertial velocity 70 fps. X-15 oxygen pressure 2000.
NASA 1:	Joe, do you have a blinking light in the pitch channel?
Engle:	Negative, but I did during the flight. Pitch dropped out right after launch and we engaged it and it stayed engaged or at least the light stayed engaged.
NASA 1:	You don't have a light now?
Engle:	Negative, light is on when the switch is off. Hydraulic pressures good. Tank pressures 580. Bearing temps, #l is +90, #2 is +70. Peroxide low light is off. Mixing chambers, #1 is -50, #2 is -60. Engine pressures, Fox is zero, #1 is 1650, #2 is 1650. APU source pressures, #l is 2450, #2 is 2600. APU tank pressures, #1 and #2 both 550. Cabin source 15,500.