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FCAS III  -  Combined Lightweight FCAS & CNC


CNC   FCAS   FCAS III   N-MASS   MACS   LTI

Instrument Description:

The FCAS-III/ CNC-III instrument was designed to perform both particle measuring/counting functions of the original FCAS and CNC instruments on lightweight platforms (balloons, remote aircraft).  The accuracy, precision and response time of this instrument are the same as those indicated previously for the FCAS and CNC.   Fundamentally the FCAS-III/ CNC-III is identical to the FCAS and CNC except there is no impactor and the instrument is cooled via an air duct.  The air duct is connected to an air scoop (or a pump in the case of a balloon) which mounts on the aircraft skin.

The FCAS-III/ CNC-III passed the Lockheed design review in 1996 and has successfully participated on one NASA sponsored ER-2 test flight. The instrument structure is comprised of  sheet metal (2024-T3 Clad and bent parts 6061-T6 as per Lockheed/Martin engineer Greg Prince) which is joined using NAS standard rivets in addition to 7075-T6 machined parts (See Figure 3).  All fasteners are NAS/MS standard.  Where parts are tapped thread inserts are used (self-locking heli-coils).

Weight:    54 lbs.
Power:    2 amps @ 120VAC (400 Hz)
               8 amps @ 28VDC


More Information:

FCAS Optics Schematic

Dimensions

 

  Updated August 9, 2011

Contact: jwilson@du.edu