Of note is that the Streak Eagle didn't just take off, point the nose up, and go. It actually followed the Mach-cruise-climb schedule, which involved leveling off, accelerating, climbing, then repeating the same sequence over and over.
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The need for Speed
- Thread starter nugget61
- Start date
Of note is that the Streak Eagle didn't just take off, point the nose up, and go. It actually followed the Mach-cruise-climb schedule, which involved leveling off, accelerating, climbing, then repeating the same sequence over and over.
Is the limiting factor in the -18 the thrust available, or the aerodynamics of the airframe itself? Or both?
Cron
Yankee Uniform Tango
There's a company out there that for $20,000+ will let you sit in a MIG-31 that takes you up to 80,000 feet. There's some amazing footage of it on youtube.
http://www.incredible-adventures.com/migs/mig31-edge-of-space.html
That would be the venerable Rutowski Climb Profile that has been around for many decades but works.
Essentially it is a subsonic climb to approx. 20k, then an unload and actual decent to a supersonic mach, then a resumption to the climb profile supersonic.
Fastest way for us to get to very high altitudes long ago. Probably still is.
PDF link here on page 7.23
That would be the venerable Rutowski Climb Profile that has been around for many decades but works.
Essentially it is a subsonic climb to approx. 20k, then an unload and actual decent to a supersonic mach, then a resumption to the climb profile supersonic.
Fastest way for us to get to very high altitudes long ago. Probably still is.
PDF link here on page 7.23
Whoa!!!! PDF from the old dude! What has this world come to? My dad can't even figure out his DVR!
Luv ya Cat!
That would be the venerable Rutowski Climb Profile that has been around for many decades but works.
Essentially it is a subsonic climb to approx. 20k, then an unload and actual decent to a supersonic mach, then a resumption to the climb profile supersonic.
Fastest way for us to get to very high altitudes long ago. Probably still is.
PDF link here on page 7.23
That link will make you understand why everyone hates calculus...
So, a little "war story" here.
1970 in Danang, the squadron receives an F-4B right out of NARF. New paint and nothing hanging on the wings.
Well it needs a test flight before it can be put into combat service. Of course I get to go on this one.
Pilot and I take off and head north toward the DMZ doing all the required maintenance test flight items, including running up to 1.3 mach to test ramp programming.
When the tests are complete we are somewhere close to the DMZ. As we turn around the old pilot asks "I wonder how fast this thing will really go, want to find out"? My response - does a bear sh*t in the woods.
Up to 40K, unload and light the burners, call Danang radar and ask them to monitor out speed run.
At the end of the run the inside gauges registered about 2.2 mach, Danang radar said 1500+ mph.
Arrived overhead Danang with low fuel light, spiral approach to touch down. Fun was had by all, after all who would know what we did?
Exit the aircraft thinking we had pulled a fast one and then notice that the fresh paint on the leading edges of the wings and the nose of the radar dome was "burnt off". Explain that one to the Maint Officer, who by the way writes your fitness report.
1970 in Danang, the squadron receives an F-4B right out of NARF. New paint and nothing hanging on the wings.
Well it needs a test flight before it can be put into combat service. Of course I get to go on this one.
Pilot and I take off and head north toward the DMZ doing all the required maintenance test flight items, including running up to 1.3 mach to test ramp programming.
When the tests are complete we are somewhere close to the DMZ. As we turn around the old pilot asks "I wonder how fast this thing will really go, want to find out"? My response - does a bear sh*t in the woods.
Up to 40K, unload and light the burners, call Danang radar and ask them to monitor out speed run.
At the end of the run the inside gauges registered about 2.2 mach, Danang radar said 1500+ mph.
Arrived overhead Danang with low fuel light, spiral approach to touch down. Fun was had by all, after all who would know what we did?
Exit the aircraft thinking we had pulled a fast one and then notice that the fresh paint on the leading edges of the wings and the nose of the radar dome was "burnt off". Explain that one to the Maint Officer, who by the way writes your fitness report.
MasterBates
Well-Known Member
I say 'worth it'
........
That is what we thought. Just got the old a** chewing, don't do it again etc. etc.
That was the only time in 1000 hrs that I ever got to go up in a totally "clean" bird
Yeah - worth it
Or write up a HAZREP for the substandard paint that burns off at speeds which were absolutely we swear to G-d nowhere near all that fast, really.
.......
Fester - you are much wiser than I - I perdict a bright future for you, you know, if you ever get to "go fast"
When you pointy nose guys (and E2 types) are saying "unload the jet," do you just mean nosing it over and putting the pointy end at the little houses, or are you trying to get it at less than 1 g for some kind of jet aerodynamics voodoo that I'll never comprehend?
........
Unloading the jet = 0 g's - In the F-4, unloading and lighting the burners was worth about 50 kts almost immediately
Peacetime Training Rules didn't allow a lot of Tomcat aircrews to fight below 10K, but F-14A intakes come alive in thick air and have a ram effect boosting thrust. We got to vary from stateside TR over Oman and Saudi Arabia and see what the jet could do. Very impressive when unleashed down low (same engines made F-111 go speed of light on the deck rivaled only by the Thud).
Hauling ass down low over Saudi returning from Iraqi airspace after Desert Storm mission. Wings are back due to speed, not for pretty picture
HJ Photo
Induced drag is a function of G-loading. You turn tighter by creating more lift via more G, causing the a/c to accelerate in the direction your lift vector is pointing. Downside to this is that induced drag becomes very high, which is why F-16s and such require full burner to yoink the aircraft around in those 9G turns. And why instantaneous G available is almost always greater than sustained G available (you bleed down from the former to the latter).
Thus, if you unload, you're doing the reverse. You remove induced drag, and all available thrust goes towards making you accelerate in velocity, not direction. I bet it would work in a P-3 too. NFOs/Tube rats might want to kill you though . . . :icon_tong