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Hyperion
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Hyperion was considered in 1958 as a ca. 1970 Saturn follow-on. It used a small jettisonable chemical booster stage that contained chemical engines and the LOX...more.
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Helios A
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Study by Kraft Ehricke of a vehicle where the booster stage contains Lox tanks only to take nuclear second stage to stratosphere. Nuclear sustainer takes payload to orbit or escape trajectory....more.
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Helios B
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Study by Kraft Ehricke of a vehicle where the booster stage contains Lox tanks only to take nuclear second stage to stratosphere. Nuclear sustainer takes payload to orbit or escape trajectory....more.
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Helios C
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Study by Kraft Ehricke of a vehicle where the booster stage contains Lox tanks only to take nuclear second stage to stratosphere. Nuclear sustainer takes payload to orbit or escape trajectory....more.
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DAC Helios
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Nuclear, recoverable upper stage boosted above atmosphere by minimum chemical stage. Douglas/Bono design approach to same concept as Convair/Ehricke Helios....more.
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DAC Helios ISI
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Nuclear, recoverable upper stage boosted above atmosphere by minimum chemical stage. Improved Specific Impulse chemical stage used many engines feeding into single...more.
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RITA C
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Nuclear single-stage-to-orbit booster. ...more.
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Nerva 2
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Version of 1960's nuclear fission engine proposed in 1990's....more.
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Timberwind
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DARPA project. Nuclear fission engine using spherical fuel elements....more.
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Timberwind Centaur
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DARPA project. Nuclear fission engine using spherical fuel elements....more.
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Timberwind Titan
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DARPA project. Nuclear fission engine using spherical fuel elements....more.
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