The report was prepared by Dr Dennis Cravens of SAIC for Edwards AFB and was recently declassified. At this time, I have neither a full copy of the report, nor information about how to attain it. These may be forthcoming. 41 2.3.6 Thermoelectric Potentials in Gravity Field. The second, the aircraft that crashed at Boscombe Down that is said to have the outward pointing tails, intakes and engine housings similar to the YF-23.
Some illustrations show it as a narrow delta, others show it as variable sweep.
The thought has been raised that it is variable sweep and the wings wee full aft, giving it the appearance of a pure delta. It is already known that CIA have operated Tier drones out of Albania for just this purpose. Interestingly there was a documentary on UK tv recently about US 'deniable' aid privded to the Croatian forces. Aiui, part of this aid was in the form of Tier II drone recce based from a small Croatian island. It makes sense to keep the best stuff for one's own use.