One Israeli F-15 destroyed by Syrian Mig-25:

“Syria obtained 30 MiG-25PD interceptors, along with five MiG-25PU trainers and eight MiG-25RB reconnaissance machines. Two Syrian MiG-25s mixed it up with two Israeli F-15s on 13 February 1981, both sides losing an aircraft. “

http://www.vectorsite.net/avmig25
“Foxbat in foreign service”

How many Foxbats have been shot down vs. SR-71s?

Firstly, the Mig-25 was used in combat and SR-71 was not.
Secondly, all Mig-25s lost in combat are downed during descent or climb. At its combat altitudes, above 20 km, and at its cruise speed, it is untouchable.
There was at least 10 Phoenix missiles launched on Mig-25 in Iraq, and all in vane. The Migs were too fast.

The Israelis downed a few, but all at lower levels, and with carefuly prepared traps.
Imagine how many Me-262s are downed by Spits, T-bolts and Mustangs.
When you have great numerical advandage, you will down much better fighter.

And third, one A-12 has been damaged over Vietnam on 30.oct.1967 by SAM-2 missile. It was lucky escape. The peaces of missile warhead were found imbeded in lower wing area.
The SR-71 routes are carefuly prepared before each flight, to avoid any SAM missile sites.

You’ll have to tell that to the people who built the F-4 and XF8U-3. Apparently they imagined it all. :rolleyes:

The F-4 and F-8 both have external compression propulsion systems.
Such propulsion systems do not suffer from unstarts.

You obviously know nothing about it. They both had problems as anybody who’s made a passing glance at the history of either aircraft knows.

Sferin, Sferin, these are ABC in theory of jet engines. You should know this if you want to discuss about this matter.
Only mixed compression engines are susceptible to unstarts.

Lot’s of planes had the unstart problem including the XB-70, the Blackbirds, F-4 Phantom, and Crusader III. In none of them was it the engine’s fault and in all of them they eventually got the problem resolved.

First of all, the F-4 and F-8 had no mixed compression engines and, so, they had no experiences with unstarts.

The F-4 and F-8 had ordinary external compression engines, where normal shock wave never entered inlet duct, so there was no unstarts.

On the other hand, the mixed compression engine experience unstarts by its nature. It can not be avoided. Only its magnitude can be reduced to lower level.

See SR-71 Manual: Even with DAFICS digital inlet control, the unstarts are frequent.
The slightest air density change can trigger unstarts. it is very sensitive.

Because of that only two a/c used mixed compression. The Blackbird and XB-70.

These are Mig-25 records which still stands:

-1967, speed over 1000 km closed circuit, with 2 tonnes payload, 2920 km/h.
-1967, speed over 500 km closed circuit, with 2t payload, 2982 km/h.
-1973, speed over 100 km closed circuit, no payload, 2605 km/h.
-1973, max altitude, with 2 t payload, 35230 m.
-1973, max altitude, no payload, 36240 m.

These are achieved with standard engines R-15B-300.

In 1977 it achieved even more with R-15BF2 engines:

-Max altitude , with 2 t payload, 37080 m.
-Max altitude , no payload, 37650 m.
There are also time to climb records which still stands.

Which other a/c can boast with such array of records?

For the benefit of the others.

Do you know what the Mig-25 inlet picture reveal?

What, like it is well known and documented that the radomes of the YF-12s melted off?

You did not read anything about XB-70 unstarts? Its odd because there are many sources. Here is one:
http://www.transterrestrial.com/archives/2008/02/a_kludge_1.html

This problem was never solved in XB-70.
In fact, every a/c with mixed compression engines has this problem.

It was the Blackbird’s J58 that often encountered unstarts, not the J93, but it had nothing to do with the engine and everything to do with the intake system. The unstarts were largely corrected with the addition of a computer control system to control the translating spike in the intake. Before that the spikes were controleld manually and failing to oeprate them within a very tight tolerance would lead to an unstart.

These are good wishes only.
Even SR-71 with digital intake controls, introduced in 1983, had this problems.
See SR-71 manual.
According to Manual, even with this digital system the problem persisted.
You can only imagine the magnitude of this problem before this.
It was surely awful.