Author: William C. Thompson
Publisher:
ISBN:
Category : Manned space flight
Languages : en
Pages : 48
Book Description
Investigations were made to study the water landing and certain ground-surface landing characteristics of a Gemini spacecraft model. The water landing experiments were made by simulating paraglider and parachute letdowns with two 1/6-scale model configurations. Parameters included various combinations of attitude, horizontal speed, vertical speed, and landing skids extended and retracted. Investigations were made in calm water and in waves. The paraglider landings at horizintal speeds of 65 feet per second (19.8 m/sec) and above resulted in a noseover or tumbling shortly after initial water contact. The maximum longitudinal acceleration of the model in calm water was about 14g units, and the maximum angular acceleration was 66 radians per second squared. In the Parachute landings with the heat shield forward the model skidded along the water surface on the heat shield. Parachute landings with the small end forward resulted in behavior similar to that of the paraglider landings.
Dynamic Model Investigation of the Landing Characteristics of a Manned Spacecraft
Author: William C. Thompson
Publisher:
ISBN:
Category : Manned space flight
Languages : en
Pages : 48
Book Description
Investigations were made to study the water landing and certain ground-surface landing characteristics of a Gemini spacecraft model. The water landing experiments were made by simulating paraglider and parachute letdowns with two 1/6-scale model configurations. Parameters included various combinations of attitude, horizontal speed, vertical speed, and landing skids extended and retracted. Investigations were made in calm water and in waves. The paraglider landings at horizintal speeds of 65 feet per second (19.8 m/sec) and above resulted in a noseover or tumbling shortly after initial water contact. The maximum longitudinal acceleration of the model in calm water was about 14g units, and the maximum angular acceleration was 66 radians per second squared. In the Parachute landings with the heat shield forward the model skidded along the water surface on the heat shield. Parachute landings with the small end forward resulted in behavior similar to that of the paraglider landings.
Publisher:
ISBN:
Category : Manned space flight
Languages : en
Pages : 48
Book Description
Investigations were made to study the water landing and certain ground-surface landing characteristics of a Gemini spacecraft model. The water landing experiments were made by simulating paraglider and parachute letdowns with two 1/6-scale model configurations. Parameters included various combinations of attitude, horizontal speed, vertical speed, and landing skids extended and retracted. Investigations were made in calm water and in waves. The paraglider landings at horizintal speeds of 65 feet per second (19.8 m/sec) and above resulted in a noseover or tumbling shortly after initial water contact. The maximum longitudinal acceleration of the model in calm water was about 14g units, and the maximum angular acceleration was 66 radians per second squared. In the Parachute landings with the heat shield forward the model skidded along the water surface on the heat shield. Parachute landings with the small end forward resulted in behavior similar to that of the paraglider landings.
Dynamic Model of Investigation of the Rough-water Landing Characteristics of a Spacecraft
Author: William C. Thompson
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 32
Book Description
Publisher:
ISBN:
Category : Space vehicles
Languages : en
Pages : 32
Book Description
Model Investigation of the Landing Characteristics of a Reentry Spacecraft with a Vertical-cylinder Air Bag for Load Alleviation
Author: John R. McGehee
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 44
Book Description
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 44
Book Description
Dynamic Model Investigation of Water Pressures and Accelerations Encountered During Landings of the Apollo Spacecraft
Author: Sandy M. Stubbs
Publisher:
ISBN:
Category : Acceleration (Mechanics)
Languages : en
Pages : 52
Book Description
Publisher:
ISBN:
Category : Acceleration (Mechanics)
Languages : en
Pages : 52
Book Description
Model Investigation of the Landing Characteristics of a Re-entry Spacecraft with a Vertical-cylinder Air Bag for Load Alleviation
Author: John R. McGehee
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
Book Description
Analytical and experimental investigations were made to determine the landing characteristics of a re-entry spacecraft equipped with a verticalcylinder air bag for impact load alleviation. Assuming a rigid body and isothermal air compression and expansion, computations were made to determine accelerations for a landing on concrete from a flight-path angle of 90 degrees (vertical flight path) at a contact attitude of 0 degrees. Two models (1/6 and 1/2 scale) of the air-bag system were tested. A 1/6-scale dynamic model of a spacecraft--air-bag configuration proposed for manned re-entry was landed on concrete, on sand, and in calm water from various flight paths for a range of contact attitudes. Reasonable agreement between computed and experimental data indicates that the scaling technique developed is satisfactory for prediction of fullscale characteristics from model tests with air bags in atmospheric environment. The maximum accelerations obtained during landings on sand were about 11g along the X-axis and about 8g along the Z-axis. The maximum accelerations obtained during landings in water were about 10g along the X-axis and about 6g along the Z-axis. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 1
Book Description
Analytical and experimental investigations were made to determine the landing characteristics of a re-entry spacecraft equipped with a verticalcylinder air bag for impact load alleviation. Assuming a rigid body and isothermal air compression and expansion, computations were made to determine accelerations for a landing on concrete from a flight-path angle of 90 degrees (vertical flight path) at a contact attitude of 0 degrees. Two models (1/6 and 1/2 scale) of the air-bag system were tested. A 1/6-scale dynamic model of a spacecraft--air-bag configuration proposed for manned re-entry was landed on concrete, on sand, and in calm water from various flight paths for a range of contact attitudes. Reasonable agreement between computed and experimental data indicates that the scaling technique developed is satisfactory for prediction of fullscale characteristics from model tests with air bags in atmospheric environment. The maximum accelerations obtained during landings on sand were about 11g along the X-axis and about 8g along the Z-axis. The maximum accelerations obtained during landings in water were about 10g along the X-axis and about 6g along the Z-axis. (Author).
Landing Characteristics of a Dynamic Model of the HL-10 Manned Lifting Entry Vehicle
Author: Sandy M. Stubbs
Publisher:
ISBN:
Category : Manned space flight
Languages : en
Pages : 64
Book Description
Publisher:
ISBN:
Category : Manned space flight
Languages : en
Pages : 64
Book Description
NASA Technical Note
Dynamic Model Investigation of Touchdown Stability of Lunar-landing Vehicles
Author: Robert W. Herr
Publisher:
ISBN:
Category : Space flight to the moon
Languages : en
Pages : 28
Book Description
Publisher:
ISBN:
Category : Space flight to the moon
Languages : en
Pages : 28
Book Description
Investigation of the Landing Characteristics of a Reentry Vehicle Having a Canted Multiple-air-bag Load-alleviation System
Author: Sandy M. Stubbs
Publisher:
ISBN:
Category : Impact
Languages : en
Pages : 32
Book Description
Publisher:
ISBN:
Category : Impact
Languages : en
Pages : 32
Book Description
Dynamic Model Investigation of a Landing-gear Configuration Consisting of a Single Main Skid and a Nose Wheel
Author: Stanley Faber
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category : Airframes
Languages : en
Pages : 24
Book Description