Originally Posted By: tom slick
Was there a big performance difference between the TF30 and F-110-400?
Is there any difference in the sensation of speed going mach 1 and mach 2?
I was amazed at how large a F-14 is.
The F-18 is a beautiful bird.
F-111 didn't work (at all) for the Navy, it was decent for the USAF
F-4 didn't work for the Navy, it was quite good for the USAF.
I hope the F-35 works out for both.
There is really no sensation of speed going supersonic...no "boom"...the jet slows it's acceleration a bit during 0.95 to 1.2 IMN (Transonic drag rise) then starts to pick up again until about 1.5 IMN when the total drag is getting really high...I've seen it fly 1.8IMN in level flight with TF-30s.
I did once look back over my shoulder (we were "bravely" egressing the fight and being chased by an F-16N) while flying at 1.4 IMN (about 800KIAS) at 10,000 feet and I could see the air density change in the shock cone...it was like looking through distorted glass...and it took me a minute to realize what I was seeing, but it was a ring around the airplane, a distortion behind us (from my vantage point) that was staying in the same place...
Interestingly, the top speed of both the TF-30 and GE-110-equipped airplanes are about the same (has to do with compression ratios in the engines as well as inlet performance)...but the F-110 gets there a LOT faster...
The TF-30 was a stop-gap engine...it put out 20,000# of thrust each in the early versions (the P-412)...but that engine had a bad habit of throwing turbine blades out in a catastrophic failure...so the "improved" TF-30 P414A had shielding around the turbine, and was de-rated to 17,000# of thrust to allow the engine to survive the demands of fighter pilots (throttle slams, high-G, high AOA, and for some of us...high AOA and high yaw at the same time...). With those de-rated engines, I've seen the speeds that I described....largely due to the effectiveness of the big intakes, that managed airflow at high speeds....the faster you were going, the more power the engines had (note that airliners lose thrust at high speed, the Tomcat gained thrust...and the wings came back, reducing drag...)
With the F-110s, the jet was simply awesome...they put out nearly 23,000# of thrust...but as the jet went faster, that number went up to 32,000#...each, in a jet that weighted 42,000# empty...it would accelerate in a 60 degree climb with lots of ordnance...it would accelerate going straight up if it was clean...pretty cool to have 90 degrees of pitch and watch airspeed increase...
And, yeah, it's a big fighter...bigger than anything else with reasonable fighter maneuverability...in the hands of a pro...it could fly slow, maneuver tight, and eat lesser airplanes...but the pilot, really, really mattered in the Tomcat...it would not respond well to rough input or poor decisions...but once you learned its sweet spots, and how to manage the dark side of high AOA, you could get behind nearly anything...C model Hornets could fly slow, but with drop tanks, they could not add energy like the Tomcat, so you could beat them up quite well in a fair fight...it was fun..