Yes. The large fuselage contains basically the powerfull, afterburner turbojet engine and part of the jet fuel. Wings have the rest of the fuel, and the upper vertical stabilizer supports the crew cabin, in wich the pilot lie prone during normal flight and stands upright during vertical take-off and landing.
And yes, during take-off, assisted by four solid rocket boosters, high G forces must be sustained by a pilot in upright position. Is this possible?