Sorry about the Mac. Maybe you can find a set of tables somewhere on the web. I just did a short search and didn't find any. Used to be Allison and Pratt produced a little pocket sized book with Isentropic shock tables and Standard atmosphere tables in it. They used to give them out at trade shows and every gas turbine engineer had one (I still have mine and use it frequently). Here is a link to a used one on the web:
Overstock Auctions AERONAUTICAL POCKET HANDBOOK 1966 Pratt & Whitney Item 46008598
Probably the best $8 you will ever spend if you are interested in propulsion. Pratt also sells it new for $34, again, a bargin at twice the price.
So that's why very high speed aircraft like the XB-70 and SR-71 tended to have a slower initial acceleration rate than you would expect?
The reason that these aircraft have slow initial acceleration is that they have turbojets. Turbojets have higher velocity, lower mass flow rate exhausts, and at low speeds the propulsive efficiency is poor. Think of it this way, bigger fan, better low speed thrust, prop, even bigger low speed thrust. The early turbojets took forever to accelerate. Those really long runways for the B47, B52 and the early fighters were necessary because the early turbojets didn't produce much low speed thrust.
I thought stagnation temps tended to produce around 600-F at Mach 3?
Depends on the altitude. Total temperature at Mach 3 is 2.69 x the absolute temperature in the free stream. Higher altitudes, above 45k it can be that low, but at 20,000 ft it will be almost 800. On the deck at Mach 3 where we were designing some missile engines, we were seeing almost 1,000F.