Historical research guide · 0188 · 2010
DIRD Cockpits in the Era of Breakthrough Flight
DIA / AAWSAP contractor
In one minute
The Defense Intelligence Agency asked what a cockpit looks like once propulsion has been solved, and the answer begins by taking the physics seriously. Working from Frontiers of Propulsion Science, the author assumes a craft that can accelerate past anything a body could survive while its cabin stays between zero and one gravity, hover fixed in place, move in all six directions independently, and exceed light speed. Almost every familiar instrument then breaks. He draws the vehicle as a double hull — an outer shell that warps the spacetime or the inertial field outside in order to propel it, an inner shell that keeps those forces off the crew — so the pilot feels none of the motion, and there are probably no windows, because the hull distorts the outside view and at high speed the light ahead and behind is Doppler-shifted out of detection entirely. What replaces them is the startling part: the cosmic microwave background becomes the speedometer, its fore-and-aft Doppler shift reading velocity against the mean rest frame of the universe.
Connection
This is chapter 4’s architecture written down by a government contractor as a design requirement rather than a hope — a craft with a warped exterior and a flat interior, and a crew that never feels the acceleration. It is chapter 8’s inertial-mass claim stated as an engineering boundary condition, the outer hull making ten gravities and the inner hull cancelling them, and it gives chapter 1 a Defense Intelligence document whose opening assumption is that reaction mass, the g-limited cruise and the light-speed ceiling are all gone.
From the source
The design target the report sets is total: a craft propelled by interacting with the properties of the spacetime and inertial frames around it, able to accelerate at g levels beyond human endurance while the environment inside is sustained anywhere between 0 g and 1 g without regard for either the craft’s motion or its outside gravitational environment, and able to exceed light speed — with practical star flight bracketed at a 100-light-year radius around the Sun, inside which thousands of star systems lie.Chapter 1, Setting Ideal Performance as Design Target, p. 1
Such a vehicle has the full six independent degrees of freedom — it can change yaw, pitch or roll without affecting altitude or lateral position, and move up, down or sideways without pitching or rolling — so future cockpits are free of the aeroplane and helicopter conventions that came from control surfaces and rotors, and can use control methods tailored to the natural action and reaction of pilots. The provisional baseline is a pair of six-degree-of-freedom joysticks on the chair arm rests.Chapter 1, Degrees of Freedom, pp. 2-3; Figures 1 and 2
The craft is drawn as a double hull: an outer shell whose propulsion interacts with the external environment, and an inner shell whose devices hold the crew cabin at safe force levels. The Alcubierre warp drive supplies the first example — expand spacetime behind, contract it in front, and the interior of the bubble stays flat, feeling no acceleration — and the inertial frame bias drive the second, where altering the scalar that defines an inertial frame induces a gradient that acts like gravity. If the outer hull creates a ten-gravity field outside, the inner hull creates an opposing field so the cabin is free of it, and could equally create 1 g while the craft coasts in zero-g deep space.Chapter 1, Separation of Internal and External Environments through Example 2, pp. 3-10; Figures 3 to 6
The consequence for the pilot is the loss of every familiar cue. The shielding that keeps the crew alive also removes the seat-of-the-pants sensation pilots fly by, and the mismatch between what is seen and what is felt invites motion sickness; the double hull will likely prevent direct visual contact with the outside or distort it beyond easy interpretation; and above light speed the flow of light to and from the craft is cut off, blue-shifted out of detection ahead and red-shifted out of it behind. The report’s own phrase, twice: do not expect windows.Chapter 1, Secondary Consequences, p. 10; Full Span of Speeds, p. 14
Nature supplies the replacement speedometer. The cosmic microwave background is a reference frame against which velocity can be measured relative to the mean rest frame of the universe, read from the fore-and-aft Doppler shift — the dipole that most published maps of the background deliberately subtract — and the Earth’s own motion against it has been measured at 365 kilometres per second, over 1.3 million kilometres per hour. It ceases to be detectable above light speed, so star trackers for faster-than-light flight must carry predictive trajectories: the craft arrives before the light showing its destination does.Chapter 1, Navigation References, pp. 14-16; Figure 8
The report is candid about where the physics stands: the propulsion predictions are informed conjectures or well-reasoned speculations, generated solely by the author and not yet published or debated with other scientists and engineers, and the underlying physics is still at steps one and two of the scientific method — defining the problem and collecting data — with momentum conservation, the role played by inertial frames, and methods to affect the gravitational and inertial properties of matter and space among the major issues still eluding resolution.Chapter 1, Sanity Check on Predictions, p. 2; Why Double Hull Needed: Example 2, p. 10
The way in
https://documents2.theblackvault.com/documents/dia/AAWSAP-DIRDs/DIRD_28-DIRD_Cockpits_in_the_Era_of_Breakthrough_Flight.pdfHow to cite it
DIA / AAWSAP contractor (2010) DIRD Cockpits in the Era of Breakthrough Flight https://documents2.theblackvault.com/documents/dia/AAWSAP-DIRDs/DIRD_28-DIRD_Cockpits_in_the_Era_of_Breakthrough_Flight.pdf