Can the plane just carry....the starter ?, it's another 200-300kg of payload, may affect the max range, etc, but much more convenient.
Most jet planes do carry a starter with them (in the tail usually) so the fact the SR-71 doesn't suggests the tradeoffs wasn't worth it
Most jet planes do carry a starter with them (in the tail usually) so the fact the SR-71 doesn't suggests the tradeoffs wasn't worth it