Skip to main content

David S F Portree

A Strategy for Comet Missions in the 1980s (1974)

Aug 4, 2013 3:02 PM

Naming the Space Station (1988)

Jul 28, 2013 4:19 AM

NASA's First Nuclear-Thermal Mars Expedition Study (1960)

Jul 24, 2013 2:02 PM

Rocket Belts and Rocket Chairs: Lunar Flying Units (1969)

Jul 18, 2013 9:17 PM

Unpacking a Moon Car

Jul 17, 2013 10:04 AM

Model Rockets on Mars Redux (1998)

Jul 10, 2013 12:12 AM

International Lunar Resources Exploration Concept (1993)

Jul 2, 2013 12:22 AM

Model Rockets on Mars (1998)

Jun 21, 2013 12:29 AM

Things To Do During a Piloted Venus/Mars/Venus Flyby Mission (1968)

Jun 15, 2013 3:14 AM

Nomad Explorer (1992)

May 28, 2013 12:32 AM

Cometary Explorer (1973)

May 22, 2013 9:40 PM

Luděk Pešek's Ill-Starred Lunar Expedition (1964)

May 16, 2013 1:53 AM

The X-15 Rocket Plane: Implications for Reusable Booster Schedule & Cost (1966)

May 7, 2013 1:51 AM

Mars Tethered Sample Return (1989)

Apr 27, 2013 2:24 PM

Missions to Comet d'Arrest & Asteroid Eros in the 1970s (1966)

Apr 22, 2013 12:58 AM

Mars Direct: Humans to Mars in 1999! (1990)

Apr 15, 2013 9:47 AM

Viking on the Moons of Mars (1972)

Apr 7, 2013 3:11 AM

A Series of Small Specialist Space Stations (1968)

Mar 31, 2013 1:03 PM

Earth-Approaching Asteroids as Targets for Exploration (1978)

Mar 23, 2013 11:28 PM

Lifting Body Spacecraft With "Staged Reentry" (1964)

Mar 17, 2013 12:47 PM