Author: Elliott D. KatzenPublisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 38
Book Description
Atmosphere Entries with Vehicle Lift-drag Ration Modulated to Limit Deceleration and Rate of Deceleration
Author: Elliott D. KatzenPublisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 38
Book Description
Atmosphere Entries with Vehicle Lift-drag Ratio Modulated to Limit Deceleration and Rate of Deceleration - Vehicles with Maximum Lift-drag Ratio of 0.5
Author: Elliott D. KatzenPublisher:
ISBN:
Category :
Languages : en
Pages : 1
Book Description
An analysis has been made of atmosphere entries for which the vehicle lift-drag ratio was modulated to maintain specified maximum decelerations and/or maximum deceleration rates. The part of the vehicle drag polar used during modulation was from maximum lift coefficient to minimum drag coefficient. The entries were at parabolic velocity and the vehicle maximum lift-drag ratio was 0.5. Two-dimensional trajectory calculations were made for a nonrotating, spherical earth with an exponential atmosphere. The results of the analysis indicate that for a given initial flight-path angle, modulation generally resulted in a reduction of the maximum deceleration to 60% of the unmodulated value or a reduction of maximum deceleration rate to less than 50% of the unmodulated rate. These results were equivalent, for a maximum deceleration of 10g, to lowering the undershoot boundary 24 miles with a resulting decrease in total convective heating to the stagnation point of 22%. The maximum convective heating rate was increased 18%. (Author).
Atmosphere Entries with Spacecraft Lift-drag Ratios Modulated to Limit Decelerations
Author: Lionel L. LevyPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 32
Book Description
NASA Technical Note
Author: The Use of Drag Modulation to Limit the Rate at which Deceleration Increases During Nonlifting Entry
Author: Lional L. LevyPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 36
Book Description
The Variation and Control of Range Traveled in the Atmosphere by a High-drag Variable-lift Entry Vehicle
Author: Donald C. CheathamPublisher:
ISBN:
Category : Drag (Aerodynamics)
Languages : en
Pages : 50
Book Description
Comparison of Two Maneuvers for Longitudinal Range Control During Atmospheric Entry
Author: Lionel L. LevyPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 24
Book Description
Monthly Catalog of United States Government Publications, Cumulative Index
Author: United States. Superintendent of DocumentsPublisher:
ISBN:
Category : United States
Languages : en
Pages : 1250
Book Description
Index of NASA Technical Publications
Author: United States. National Aeronautics and Space AdministrationPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 448
Book Description
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1284
Book Description