Performance of Long Range Hypervelocity Vehicles

Eggers, A. J.

doi:10.2514/8.12488

Cited by 11 publications

(13 citation statements)

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“…Their original research memorandum was considered confidential; 12 subsequent versions were not. 5,13 Their primary interest was modeling the atmospheric flight portion of a multiple-skip entry trajectory that could be used to extend the range of a hypersonic vehicle. The primary assumptions used by Eggers et al were neglecting gravity in both the lift and drag equations (Eq.…”

Section: B Eggers Allen and Neice's Skip-entry Solutionmentioning

confidence: 99%

“…22 The steep lifting entry solutions are generated using Eq. (6), (13), (15), and (29). The entry trajectories are approximated from the initial state near atmospheric interface to γ = 0.…”

Section: Accuracy Of Solutionmentioning

confidence: 99%

“…The steep lifting entry solution was primarily developed in the 1950s and 60s by Eggers, Allen, and Niece of the National Advisory Committee for Aeronautics Ames Aeronautical Laboratory; 5 Lees, Hartwig, and Cohen of Space Technologies, Inc. for the U.S. Air Force; 6 and Wang and Ting of the Polytechnic Institute of Brooklyn, also supported by the U.S. Air Force. 7 Additional contributions were made by Miele and Vinh et al, who developed expressions for flight range, and Vinh et al, who applied the solution to aerocapture trajectories in 2000.…”

Section: Introductionmentioning

confidence: 99%

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Review and Assessment of the Steep Lifting Entry Closed-Form Trajectory Solution

Putnam¹,

Braun

2016

AIAA Atmospheric Flight Mechanics Conference

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The complete, historical closed-form steep lifting entry trajectory solution is documented and developed from first principles. The efficacy and accuracy of the solution is assessed for application to aeroassist missions of interest, including aerocapture and entry. Specifically, analytical assessment of the primary assumptions in the solution shows the solution is applicable across a wide range of initial states for vehicles with nonzero lift-to-drag ratios. Solution accuracy is assessed relative to the planar equations of motion; accuracy improves for steeper trajectories and larger lift-to-drag ratios. The steep lifting entry estimate of peak acceleration is shown to be accurate to within 10% for initial flightpath angles steeper than approximately -10 deg across a variety of vehicles, missions, and planetary destinations. Overall, the steep lifting entry solution provides a simple, rapid first-order trajectory solution capability for lifting aeroassist vehicles with relatively steep initial flight-path angles.

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Section: B Eggers Allen and Neice's Skip-entry Solutionmentioning

confidence: 99%

Section: Accuracy Of Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Review and Assessment of the Steep Lifting Entry Closed-Form Trajectory Solution

Putnam¹,

Braun

2016

AIAA Atmospheric Flight Mechanics Conference

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“…Kemp and Riddell' 74 ' conclude that, for a maximum skin temperature of 1,100°C, (W/C»A) should be as low as 2, which is hardly practical. Eggers' 75 ' has calculated the re-entry of a large finned hemisphere for which (W/C B A) = 16 and which reached a temperature of 1,400°C. A ceramic coating was suggested to withstand this degree of heating.…”

Section: Satellite Recoverymentioning

confidence: 99%

“…We must be prepared for radically new shapes to appear. There are, for example, the ballistic missile with conical or blunt nose re-entering at steep angle, the hypersonic aeroplane' 75 ' with highly swept and rounded leading edges cruising above 100,000 ft., and the hemispherical satellite' 89 ' coming in a low flight path angle to be recovered later by parachute. These three representative configurations have quite different flight characteristics, as shown in Table V.…”

Section: The Scope Of Future Aerodynamicmentioning

confidence: 99%

From Aviation to Astronautics

Allen¹

1958

J. R. Aeronaut. Soc.

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Now that major space flight operations are under way in Russia and America there is a natural interest in such topics in this country among those working on aeronautics and guided missiles. At present one can only speculate on how this country will eventually contribute to space flight. As the Duke of Edinburgh has remarked, the difficulty is not due to lack of scientific talent but to the absence of surplus funds. Even so, we can make effective contributions in many ways and we should not lack boldness in seeking out possible ways of doing this. In the meantime, however, there seems to be a place for a review of the present technical situation and prospects for the near future, as seen from the standpoint of one in the British Aircraft Industry. As the majority of interplanetary flights will begin through the Earth’s atmosphere and many will finish by way of the same medium, the Royal Aeronautical Society can claim a special and legitimate interest in these matters. Ever since its inception the Society has encouraged the discussion of new technical advances, although its ability to do this has sometimes been hampered by the requirements of security. The same restrictions apply to this paper with the result that I have chosen to draw upon published material throughout, and to review the subject on a broad basis. I hope the work will not be less acceptable on these grounds.

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On the Development of Orbital Techniques

Koelle

1959

IXth International Astronautical Congress/Ix. Internationaler Astronautischer Kongress/IXe Congrès International D’astronautiqu

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Performance of Long Range Hypervelocity Vehicles

Cited by 11 publications

References 0 publications

Review and Assessment of the Steep Lifting Entry Closed-Form Trajectory Solution

Review and Assessment of the Steep Lifting Entry Closed-Form Trajectory Solution

From Aviation to Astronautics

On the Development of Orbital Techniques

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