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General Technics CYA-100 Angle of Attack Indicator


FREQUENTLY ASKED QUESTIONS
GIF
    WHAT IS THE CYA-100?
       
AN AIRFOIL (WING) CAN STALL AT ANY AIRSPEED, BUT WILL ALWAYS STALL AT ONE ANGLE OF ATTACK. THE CYA-100 DISPLAYS YOUR ANGLE OF ATTACK BETWEEN TWO PROGRAMMABLE LIMITS.  YOU HAVE  A CONSTANT VIEW OF JUST HOW FAR YOU ARE FROM STALL, EVEN IN STEEP BANKED TURNS, HIGH DENSITY ALTITUDE, AND HIGH WEIGHT. AN INCREDIBLE  SAFETY ENHANCEMENT!

    WILL THE CYA-100 WORK ON MY PLANE?
       
PROBABLY. THE CYA-100 HAS BEEN SUCCESSFULLY INSTALLED ON NAVIONS, BEECHCRAFT, HUSKYS, MOONEYS, CHAMPIONS, PIPERS, CESSNAS, AND MANY HOMEBUILTS. CAREFULLY READ THE INSTALLATION AND OPERATION MANUAL HERE TO SEE IF YOU CAN MOUNT THE PROBE AND PULL THE WIRE. THERE ARE NO HOSES OR SECONDARY "COMPUTER" BOXES TO DEAL WITH. CHECK WITH YOUR IA BEFORE ORDERING TO MAKE SURE YOU ARE BOTH "ON THE SAME PAGE" WITH THE INSTALLATION. THE CYA-100 IS FAA APPROVED, BUT THAT DOESN'T MEAN THAT YOU CAN PUNCH THROUGH PRESSURIZED CABINS OR DRILL THROUGH WING SPARS TO ACCOMPLISH THE INSTALL! FOR THE VAST MAJORITY OF GENERAL AVIATION, THIS IS NOT AN ISSUE. THE INSTALL IS JUST A LOG-BOOK ENTRY.

    HOW BIG IS THE CYA-100?
         IT'S REALLY SMALL. THE DISPLAY PROCESSOR IS 1.25 INCHES DEEP BEHIND THE PANEL, 2 INCHES HIGH, AND 0.375 INCHES WIDE. THE PROBE IS 3.75 INCHES TALL. IF YOU DON'T WANT TO SLOT YOUR PANEL FOR THE DISPLAY, IT WILL EASILY FIT INTO A 2-1/4 INCH INSTRUMENT HOLE ADAPTER PLATE.

    HOW MUCH DOES THE CYA-100 WEIGH?
        IT'S REALLY LIGHT. THE DISPLAY PROCESSOR WEIGHS 1 OUNCE. THE PROBE WEIGHS 2 OUNCES. A FULL INSTALL WITH WIRING AND CIRCUIT BREAKERS IS GENERALLY LESS THAN 12 OUNCES.

    WHAT ARE THE POWER REQUIREMENTS OF THE CYA-100?
        THE CYA-100 WILL RUN ON ANY INPUT VOLTAGE BETWEEN 7 AND 45 VDC. CURRENT DRAW IS LESS THAN 75 mA (0.075 A). REVERSE CONNECTION AND ALTERNATOR DUMP WON'T HURT IT.

    IS THE VANE PROBE HEATED? DO YOU OFFER A HEATED PROBE?
        NO, AND NO. HERE'S WHY. THE CYA-100 IS UNIQUELY CALIBRATED TO DISPLAY THE ANGLE OF ATTACK OF THE WING TO WHICH IT IS MOUNTED. IF THE WING ICES, IT'S NOT THE SAME WING, AND WOULD STALL AT A DIFFERENT CRITICAL ANGLE OF ATTACK. WITH A HEATED PROBE, THE PILOT MIGHT BE TEMPTED TO RELY ON ANGLE OF ATTACK INFORMATION THAT NO LONGER APPLIES TO AN ICED AIRFRAME.


    WHAT AIRSPEED IS THE VANE PROBE RATED FOR?
        THE VANE PROBE HAS BEEN TESTED TO 250 KNOTS AT SEA LEVEL, AND STRUCTURALLY WILL SURVIVE AND WORK UP TO 500 KNOTS BY AERODYNAMIC ANALYSIS. AT ABOUT 500 KNOTS, THE PROBABILITY OF FLUTTER IS HIGH, BASED ON JOHN CIPOLLA'S EXCELLENT FINSIM SOFTWARE AT http://www.aerorocket.com/finsim.html

    WHAT KIND OF DISPLAY DOES THE DISPLAY PROCESSOR USE?
        THE DISPLAY PROCESSOR USES A PROPRIETARY CONFIGURATION OF HIGH BRIGHTNESS SURFACE MOUNT LIGHT EMITTING DIODES (LEDS) IN THREE COLORS (GREEN, YELLOW, RED).

     IS THE DISPLAY DIMMABLE?
        THE DISPLAY PROCESSOR MONITORS THE PHOTODIODE CURRENT OF THE LEDS TO AUTOMATICALLY ADJUST THE DISPLAY INTENSITY. IT'S EASILY VIEWABLE FROM MOONLESS NIGHTS TO FULL SUNLIGHT.

    IS THE DISPLAY VIEWABLE IN DIRECT SUNLIGHT?
        ABSOLUTELY.

    IS THE CYA-100 BUILT UNDER PMA OR TSO?
        NO.  GENERAL TECHNICS HAS OVER 30 YEARS OF EXPERIENCE IN THE DESIGN OF MILITARY AVIONICS, AND WE DESIGNED THE CYA-100 TO MEET THE ENVIRONMENTAL STANDARDS OF MIL-STD-810, REV. G.  THE CYA-100 HAS BEEN APPROVED BY THE FAA UNDER 14 CFR 21.8(d) FOR INSTALLATION ON CERTIFICATED AIRCRAFT.

    WILL I NEED A FIELD APPROVAL TO INSTALL THE CYA-100?
        NOT LIKELY. THE CYA-100 IS THE ONLY REASONABLY PRICED, VANE DRIVEN TRUE ANGLE OF ATTACK DISPLAY SYSTEM TO HAVE BEEN GRANTED FAA INSTALLATION  APPROVAL FOR THE VAST MAJORITY OF GA AIRCRAFT. MOST INSTALLATIONS REQUIRE ONLY A LOGBOOK ENTRY. SEE THE "TECH" PAGE FOR LINKS TO OUR FAA APPROVAL LETTER, AND THE INSTALLATION AND OPERATION MANUAL.

    DOES THE CYA-100 HAVE ANY BELLS AND WHISTLES?
        MILITARY STUDIES SHOW THAT VOICE ALERTS NEED TO BE UNDERSTOOD, INTERPRETED, AND THEN ACTED ON. THE CYA-100 HAS A UNIQUE WARBLING TONE AT STALL THAT DEMANDS INSTANT ACTION!

    DOES THE CYA-100 HAVE A WARRANTY?
        YES. THE DISPLAY PROCESSOR AND PROBE IS WARRANTED FOR 3 YEARS FROM THE DATE OF INSTALLATION. YOU ARE LIMITED TO 3 REPLACEMENT PROBE VANES WITHIN THAT TIME.