MTK 446 electronic timer: features

Standard features

configurable for F1A, F1B and F1C models
maximum DT time: 999.99 s
up to 17 timed commands
timing accuracy: 0.02 s
servo setting accuracy: about 0.3°
controls one or two servos
configurable servo gain and neutral position
sleep mode for battery saving
configurable beep after DT for model location
configurable battery check
power switch eliminated to reduce flying field errors
all timer switch sensors are hermetically sealed or Hall-effect devices for added reliability
RCDT radio override for trimming

reprogrammable microprocessor with control program and flight program held in non-volatile flash memory
control program is user upgradable
flight programs are maintained and loaded into the timer with a CASIO digital diary or Palm Pilot PDA

failsafe DT mode
bailout timer for tow hook unlatch (not for the inertial hook)
configurable bailout action
On Line Acceleration (OLA) system controls the stabiliser during pre-launch acceleration
inertial tow hook support. The inertial hook opens its latch during pitch up just after release, starting the timer
foolproof operation. The combination of no power switch and timer restart sequence makes it impossible to forget to start the timer before the flight

altimeter option allows two timed altitude measurement per flight with 1 m accuracy
the timer calculates the average vertical speed
altitude measurements can be uploaded and displayed on the programming device