NFAC is a unique facility primarily used for determining aerodynamic characteristics of large-scale and full-scale rotorcraft and powered-lift V/STOL aircraft, as well as tesing of wind turbines, …

3 天之前 · The National Full-Scale Aerodynamics Complex (NFAC) 40- by 80-/80- by 120-Foot Wind Tunnels are managed and operated by the U.S. Air Force’s Arnold Engineering …

Recent cracking of the National FuU Scale Aerodynamic Complex (NFAC) wooden fan blades has been attributed to higher mean loads and higher cyclic loads due to complex fan inflow …

Full-Scale Aerodynamics Complex (NFAC) located at the NASA Ames Research Center (fig. 1). it is an open circuit wind tunnel with a closed, rectangular test section. The maximum test …

The basic design of the NFAC wind tunnels is a subsonic tunnel built to test takeoff and landing qualities of aircraft. A major part of the wind tunnel is the fan drive system. The NFAC tunnels …

Fan: Fan: Stagnation Pressure/Temperature: Ambient, 485 to 580 R: Ambient, 485 to 580 R: Data System: Real-time DEC PDP 11/84, Main Comp. DEC VAX 8650: Real-time DEC PDP 11/84, …

The current fan drive system is composed of six variable pitch fans, each 40 feet in diameter arranged in two rows of three. Each fan has 15 laminated wood blades and is powered by a …

2021年5月4日 · NFAC由40ft × 80ft （12m × 24m）回流式风洞和 80ft × 120ft (24m × 37m)直流式风洞组成，前者建成于 20 世纪 40 年代，后者是利用40ft × 80ft风洞动力段和部分洞体回路， …

1/50th scale NFAC model Designed and fabricated to closely simulate the performance of the full scale NFAC facility. o Performs aerodynamics characteristics’ test of models. o Used to …

2022年7月28日 · NFAC是世界最大的风洞，其设计建设的初衷是用于全尺寸或大缩尺比固定翼飞机、短距/垂直起降飞机、直升机和倾转旋翼机气动特性试验研究，建成后也用于航天器、降 …