| Displaying 1 - 8 of 8 matching stories. |
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| 10.01.2009 |
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Technology Today
Recently, we’ve talked about the FAA’s NextGen Roadmap and many of the new tools that are being made available to us. Due to accuracy errors inherent to GPS, two methods have been created to augment the...
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| 08.01.2009 |
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Technology Today: GBAS
Ground Based Augmentation Systems What good is a technology if it only has one name? Ground based augmentation systems (GBAS) is one such technology that is part of the FAA’s NextGen roadmap. It resides...
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| 12.01.2008 |
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Ask Ray Prouty
Sikorsky’s Black Hawk In Autorotation Mr. Prouty’s writings provide great insights into all of the forces acting upon a helicopter. I have two questions regarding ("Gross Weight’s Effect on Autorotation" October 2007, page 44)...
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| 09.01.2008 |
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Ask Ray Prouty
Thrust Instability In Forward Flight My last column discussed the phenomena involving the vortex ring state in vertical descent in what is commonly known as "power settling" ("Settling With Power, Redefined" June 2008, page 48). In it, I...
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| 06.01.2008 |
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Settling With Power, Redefined
The recent letter from CW4 Steven Kersting reminded me that the term "settling with power" is somewhat misleading ("VRS vs. Settling With Power, February 2008, page 7). Power has little to do with the phenomenon. As I discussed in the July 2007...
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| 01.01.2008 |
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Vortex Ring State and Gross Weight
Vortex Ring State And Gross Weight Maj. Devasish Mishra of the Indian Army writes to inquire about vortex ring state. He is a helicopter flight instructor at the Combat Army Aviation Training School at...
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| 10.01.2007 |
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Ask Ray Prouty: Gross Weight’s Effect on Autorotation
LT. COL. GREG RUTTER OF THE AUStralian Army is trying to understand the effect of weight on auto rotation. "I contend that, for any given weight, a helicopter will have a steady-state rate of descent and...
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| 07.01.2007 |
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Ask Ray Prouty: Tail-Rotor Vortex Ring State
READER JEFF FOZARD RECOUNTS uncommanded right turns at low speed ("Loss of Tail-Rotor Effectiveness," May 2007, page 9). The cause was probably a tail rotor in vortex ring state, a condition we...
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