Longitudinal stability is an issue for ALL highspeed aircraft. How many of them have chines?

Each design have its own, more or less successful, solutions.

Because of very long aspect fuselage, Lockheed engineers opted for chines, which reduce side force ahead of center of gravity.
Other designs, like XB-70, depend on half wing dropping, aft of center of gravity. Etc.

The problem is that you think that aerodesign is to put stabilizators for everything,thats ridicoulus, why to put stabilizators when you can avoid those problems with a better nose design???, dont be ridicoulus.

More stabilizators means more drag, and so, less speed.

You’re merely restating what you and Over-G have said but you have not explained HOW the chines are suppose to “reduce the value of the side force”. I hope you’re not thinking something along the lines of “well you have that sharp edge so the air can’t push as hard” because it doesn’t work that way. So tell us, specifically HOW the chines reduce the sideforce.

You have got the point. Chines reduce drag to side force ahead of center of mass.

That is why YF-12 needed additional ventral fins aft of center of mass.
Its radome created more drag (than chines) to side force, so it had to be countered with more aft fins.

The long fuselages are more effected because of longer moment arm.

Chines effect directional and longitudinal stability.

Without them, trim drag would be too high.
That is why YF-12 have more drag than others in the series, and less speed.

The first use of RAM was in the NAZI’s Horten 229 when charcoal was placed in between the plywood layers. The plywood that formed the skin became a crude RAM.
The US’ first use of RAM was in the early 1950s to cure multibounce on ELINT/SIGINT aircraft who were snooping on the Soviets. This usage was not for RCS purposes, but to improve performance of antennas used to collect intelligence.

Yes, that is all true, but when talking about Mach 3, very high temperature RAMs, it is out of the question that it was ready for use in 60-s and 70-s.

The first manned aircraft which entered inventory with reasonably developed RAMs is subsonic F-117.
The B-1A would have used the RAMs, had it been developed enough for service use. And we are talking here of Mach 2 speeds.

The B-1B used the RAMs in 80-s, but it is a transonic aircraft built for relatively low skin temperatures.

Remember that british radar operaters detected SR-71 at over 400 km away coming to Farnborough airshaw a years ago. So, its RCS is surely very large.

The same was certainly true for vietnamese radar operaters. They must have been detecting the Blackbird at very long ranges, also.

So, it is not a surprise that one A-12 was almost shot down.

There is no any RAM in Blackbird family. That is a myth.

Any RAMs would burn up rapidly at Mach 3 speed, even steel and titanium alloys are there at the limits of their strengths.

Can’t you people understand that.

Why B-1A had no RAMs in 70-s. Only B-1B has got it in 80-es.

Think about that.
Before mid 80-s RAMs were undeveloped even for subsonic use, not to speak for Mach 3, 300 degrees C temperatures !!!