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By: 22nd July 2004 at 15:15 Permalink - Edited 1st January 1970 at 01:00
-Should be around Mach 2.5, and it should be able to reach it with four AIM-7 or AIM-120 carried along the intake sides, provided they can stand the heat. Any faster than that and you need to start using more temperature resistant materials like in the MiG-25. How long can it sustain it? I dunno, you'd have to find a good figure for engine fuel consumption at maximum power and work from there.
By: 22nd July 2004 at 15:57 Permalink - Edited 1st January 1970 at 01:00
-I am not sure if the F-15 windshied (cockpit) is plexiglass (in F-16, I heard it was)... so the limiting factor could also be the kinetic heating of the windshield.
By: 22nd July 2004 at 23:23 Permalink - Edited 1st January 1970 at 01:00
-That speed is in a clean configuration, an operational pilot wouldn't see anything near that. The F/A-22 is faster using military power while carrying 8 AAM's than the Eagle is in full afterburner while carrying 4 Sparrow/AMRAAM + 4 Sidewinders. That's from a chart the AF published years ago giving relative capabilities of the Eagle and its replacement.
By: 22nd July 2004 at 23:59 Permalink - Edited 1st January 1970 at 01:00
-The F/A-22 is faster in military power than the F-15, but top speed on the F-15 is higher.
The F/A-22 was built with the realization that no one needs a top speed of Mach 2.5.
By: 23rd July 2004 at 01:23 Permalink - Edited 1st January 1970 at 01:00
-Yeah, but my point was useful speed of each, and efficiency, F-15 has to use a LOT of fuel to match the Raptors cruising speed while carrying a warload.
By: 23rd July 2004 at 01:50 Permalink - Edited 1st January 1970 at 01:00
-Yeah, but my point was useful speed of each, and efficiency, F-15 has to use a LOT of fuel to match the Raptors cruising speed while carrying a warload.
notice SOC said only missiles on the corner of the intake, obviously that means no wing pylons.
By: 23rd July 2004 at 13:09 Permalink - Edited 1st January 1970 at 01:00
-Mach 2.5 with any kind of missiles seems too much. How the speed of aircraft effects the range of launced missile, surely the relation must be non-linear.
By: 23rd July 2004 at 16:54 Permalink - Edited 1st January 1970 at 01:00
-Missile range goes up as the launch platform gets faster. More kinetic energy is imparted to the missile at launch, so it goes farther. The higher and faster you go, the farther away you can kill things basically. And as for fast aircraft carrying missiles, the MiG-25P and MiG-25BM carried their R-40 and Kh-58 missiles externally and could hit Mach 2.83 while doing so.
By: 23rd July 2004 at 18:44 Permalink - Edited 1st January 1970 at 01:00
-One other variable is the target speed.... All else being equal, the faster the target, the greater missile range (to be more specific.... the range from launch platform to the target at missile launch).
Another way to look at it is a combination of closure velocity (V sub c) and density altitude. All assuming no target maneuvering (constant velocity vector)
Low altitude, opening Vc --min maximum range; high altitude, high closure-- max maximum range
Mark
By: 23rd July 2004 at 18:51 Permalink - Edited 1st January 1970 at 01:00
-This is also mainly contingent on a head-on engagement. A tail-chase engagement will be slightly different. In that case, the faster your speed and the slower the target speed, the more range you get.
By: 23rd July 2004 at 22:17 Permalink - Edited 1st January 1970 at 01:00
-And as for fast aircraft carrying missiles, the MiG-25P and MiG-25BM carried their R-40 and Kh-58 missiles externally and could hit Mach 2.83 while doing so.
Which gives a new sort of problems. The FAB-500-62M bombs as used by the MiG-25RB series (also capable of being hauled at such speeds) have a special coating to make them withstand frictional heating. Also, these bombs are milled to far more stringent standards than regular iron bombs as even a slight imbalance in their shape (like an off-centre 'tip') might do a lot of harm at such speed thanks to aerodynamics.
Posts: 291
By: fft - 22nd July 2004 at 15:12
Whats the top speed of F-15 in clean configuration, and how long it can sustain it, until the fuel runs out or the temperature limitations of airframe/engine is the main factor.