Author: Robert O. SchadePublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 20
Book Description
Ground Interference Effects
Author: Robert O. SchadePublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 20
Book Description
Ground Interference Effects
Author: Robert O. SchadePublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
A study has been made to determine the basic phenomena associated with the ground interference effects for VTOL aircraft in an attempt to arrive at some generalized conclusions regarding the effect of the ground on the various types of VTOL aircraft. The results showed that helicopter and other rotor aircraft generally experience favorable ground effect. In the case of propeller VTOL aircraft the tilt-wing configurations will usually experience a small favorable ground effect. For the deflected-slipstream configurations a large detrimental ground effect is experienced at low angles of the thrust axis but little or no ground effect is experienced at angles of 25 degrees or 30 degrees. For buried-fan and jet configurations the ground effect can be favorable or unfavorable depending upon the geometry of the fans or jets and the airframe. For single-jet configurations the ground effects are detrimental and cannot be eliminated by fixes on the airplane. For these cases, a perforated landing platform appears to offer promise as a means of minimizing the adverse ground effect. Ground effects experienced in hovering flight tend to decrease with increasing forward speed and are rather small at airspeeds that might be of interest for STOL operation of the various VTOL configurations. The qualitative predictions of the ground effect for various VTOL aircraft configurations can be made with a fair degree of confidence, but it appears at the present time that the magnitude of the effect for specific configurations will usually have to be obtained from test data.
Comparison of Experimental and Theoretical Pressure Distribution Caused by Ground Interference Effects on Horizontal-wedge Test-track Sleds
Author: D. Phillip AnkeneyPublisher:
ISBN:
Category : Aerodynamic load
Languages : en
Pages : 62
Book Description
Interference Effects of Single and Multiple Round Or Slotted Jets on a VTOL Model in Transition
Author: Raymond D. VoglerPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 88
Book Description
NASA Technical Note
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 406
Book Description
Ground and Interference Effects on the Aerodynamic Characteristics of Bodies
Author: Brian MellonPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Propulsion-induced Effects Caused by Out-of-ground Effects
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Book Description
Grounds for Grounding
Author: Elya B. JoffePublisher: John Wiley & Sons
ISBN: 1118211510
Category : Technology & Engineering
Languages : en
Pages : 827
Book Description
GROUNDS FOR GROUNDING The first book to cover grounding from the circuit to system and across the entire spectrum of applications Grounds for Grounding provides a complete and thorough approach to the subject of designing electrical and electronic circuits and systems, blending theory and practice to demonstrate how a few basic rules can be applied across a broad range of applications. The authors begin with the basic concepts of Electromagnetic Compatibility (EMC) that are essential for understanding grounding theory and its applications, such as “ground loop,” which is one of the most misunderstood concepts in EMC. Next, they provide an introduction to grounding, including safety grounding, grounding for control of electromagnetic interference, and grounding-related case studies. Subsequent chapter coverage includes: Fundamentals of grounding design Bonding principles Grounding for power distribution and lightning protection systems Grounding in wiring circuits and cable shields Grounding of EMI terminal protection devices Grounding on printed circuit boards Integrated facility and platform grounding system Practical case studies are integrated throughout the book to aid in readers’ comprehension and each chapter concludes with a useful bibliography. Grounds for Grounding is an indispensable resource for electrical and electronic engineers who work with the design of circuits, systems, and facilities.
Ground-effects Investigation of a STOL Air- Sea Transport Model with Blowing Over the Canard and Wing Flaps
Author: Raymond D. VoglerPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 52
Book Description
Ground effects investigation of STOL air-sea transport model with blowing over canard and wing flaps.
Tables of Interference Factors for Use in Wind-tunnel and Ground-effect Calculations for VTOL-STOL Aircraft
Author: Harry H. HeysonPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 226
Book Description
