Announcement

Collapse
No announcement yet.

"Blackswift" hypersonic flight from a runway

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
  • #1

    "Blackswift" hypersonic flight from a runway

    NASA Tests Hypersonic Blackswift - Slashdot
    http://science.slashdot.org/science/08/06/27/0248258.shtml
    dijkstra writes "Blackswift was previously rumored to be a super secret hypersonic scramjet-based aircraft co-named HTV-3X, essentially a 21st century version of the SR-71. Today NASA has unveiled the real Blackswift (video link), which uses pulse detonation engines (PDEs). A PDE is essentially a m...


    Estimated speeds are MACH 6, or roughly 4150 mph ( 6 678.7776 kph) at at 100000 ft (30500m). Though I think hypersonic flight is only possible at near LOE, so actual speed would be different I think.

    Mach Number
    http://www.grc.nasa.gov/WWW/K-12/airplane/mach.html
    Mach number, Mach, gases, equations, mathematics, fluid dynamics, compressibility, compressible aerodynamics, aerodynamics, area ratio, calculators, modeling, isentropic flow, pressure, temperature, density, pressure ratio, temperature ratio, Mach angle, speed of sound, subsonic, supersonic, hypersonic, shock waves


    Only 19 MACH more to reach LOE from vertical take-off, woo hoo!
    “Inside every sane person there’s a madman struggling to get out”
    –The Light Fantastic, Terry Pratchett
    Tags: None
  • #2
    Welcome to VULCAN - a coaxial engine consisting of a standard turbojet inside a surrounding scramjet that would allow runway takeoff, acceleration to the scramjet startup speed then flight using just the scramjet. Remember those hypersonic fighters in "Stealth"? This is pretty damned close.

    June 26, 08

    DARPA Unveils Mach 6 Hypersonic Vulcan ScramJet Engine

    DARPA has released info in a briefing on how one might build a propulsion system that combines a Constant Volume Combustion (CVC) engine and a full-scale turbine engine to accelerate a hypersonic jet to multiple Mach. It's called the Vulcan, and it's a demo intended to power a full-scale reusable hypersonic cruise vehicle like the Falcon HTV-3X, and to do it by 2012. According to the DARPA briefing, the main point is to integrate a currently produced turbine engine like the F110-129 or the F119, with minimal modifications and a CVC.

    The CVC will function only at supersonic speeds. It's essentially a slender tube with few or no moving parts through which air is compressed at high speeds. The fuel is combusted along the way. The exhaust comes out the nozzle faster than the air came in.
    The turbojet engine is required for runway takeoff and to push the plane from zero to Mach 4. At this point the CVC would accelerate it to Mach 6 and beyond. Preferably, both would share a common inlet and nozzle.

    The hypersonic jet capable of delivering 12,000 pounds of payload up to 9,000 nautical miles from the continental United States in less than two hours. It would also be used for reconnaissance, strike, and other critical national missions.
    Last edited by Dr Mordrid; 27 June 2008, 12:44.
    Dr. Mordrid
    ----------------------------
    An elephant is a mouse built to government specifications.

    I carry a gun because I can't throw a rock 1,250 fps

    Comment

    Previous template Next
    Working...
    X