Dynon Avionics SkyView Pilots Users Guide - Manual (Page 76)

EMS Operation
5-6 SkyView Pilot’s User Guide - Revision S
Tach Time - labeled TACH when displayed on an Engine Page - is a measure of engine time
normalized to a cruise RPM. The cruise RPM parameter must be set properly in the system
setup to generate a correct tach time
Hobbs Time - labeled HOBBS when displayed on an Engine Page - is a simple timer that runs
whenever the oil pressure is above 15 PSI or the engine is above 200 RPM. It essentially runs
when the engine does.
The Engine Run Timer - labeled RUN TIME when displayed on an Engine Page - is a Hobbs style
timer that records the time your engine has been running during your current flight. It resets
the first time the engine is started after SkyView is powered on. This allows you to view your
previous flight’s Engine Run Time any time before you start your engine before a flight.
The Engine Trip Timer - labeled TRIP RUN when displayed on an Engine Page - is a Hobbs style
timer that records the time your engine has been running. Unlike the Hobbs time, it can be
reset by pressing ENGINE > CLR TMR.
The Total Air Timer - labeled AIR TOTAL when displayed on an Engine Page - runs any time that
SkyView determines that the aircraft is in flight. SkyView uses the presence of significant
airspeed or GPS speed to decide whether the aircraft is flying. This timer can only be reset or
adjusted in the Aircraft Information menu within SkyView Setup. See the SkyView System
Installation Guide for information about using SkyView’s Setup Menu.
The Air Timer - labeled AIR TIME when displayed on an Engine Page - runs any time SkyView
determines the aircraft is in flight. SkyView uses the presence of significant airspeed or GPS
speed to decide whether the aircraft is flying. Resets as SkyView detects that the aircraft has
transition to “in the air” This time is also optionally used to calculate the Switch Fuel Tank
Reminder.
The Air Trip Timer - labeled AIR TRIP when displayed on an Engine Page -runs any time that
SkyView determines that the aircraft is in flight, just like the Total Flight Timer. Unlike the Total
Air Timer, it can be reset by pressing ENGINE > CLR TMR.
A Switch Fuel Tank Reminder can be configured to alert the pilot to switch their fuel tanks at a
set time or fuel usage interval (based on the fuel computer’s fuel calculations). When enabled,
it will periodically annunciate a “Switch Fuel Tank” alert message and audio alert. There is no
visible counter for this timer. See the SkyView System Installation Guide for details on
configuring this reminder.
Fuel Computer
The Fuel Remaining, Fuel Used, Fuel Efficiency, Fuel at Waypoint, and Range values
are not directly measured. These values are calculated based upon measured flow
rates and user input of fuel quantity. Do not use these values as primary indicators.
By using the optional fuel flow sensor and GPS information together, SkyView can generate and
display different info items that pertain to your aircraft’s computed fuel state and performance.