Here's a sample of the 27 entries vying for the $20 million X Prize (www.xprize.org). Many of these designs are prototypes of space planes for taking tourists on suborbital flights.
COMPANY / LOCATION SPACEPLANE MODE OF OPERATION

Aeronautics & Cosmonautics Romanian Assn.,

Valcea, Romania

Orizont Vertical blast-off, parachute water landing

American Astronautics Corp.,

Oceanside, Calif.

Spirit of Liberty Vertical rocket launch, parafoil-glide landing

Bristol Spaceplanes Ltd.,

Bristol, England

Ascender Jet horizontal launch, rocket ascent from 8 km, jet horizontal landing

IL Aerospace Technologies,

Zichron Ya'akov, Israel

Negev 5 Balloon launch at 25km, parachute landing

Interorbital Systems,

Mojave, Calif.

Solaris X Vertical rocket launch, horizontal landing

Kelly Space & Technology,

San Bernadino, Calif.

N/A Air launch from Boeing 747, glide-in landing

Micro-Space Inc.,

Denver

Crusader X Vertical rocket launch, parachute landing

Pioneer Rocketplane Inc.,

Solvang, Calif.

Thunderstar Rocket-power horizontal launch and landing

Starchaser Industries,

Chesire, England

XP Two-stage vertical rocket launch, parachute landing

Suborbital Corp.,

Moscow, Russia

Cosmopolis XXI Solid-rocket horizontal launch, glide-in landing

TGV Rockets,

Bethesda, Md.

Michelle-B Vertical rocket launch, glide-in landing

Vanguard Spacecraft,

Bridgewater, Mass

Eagle Vertical blast-off, parachute water landing
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