Hi,
I’m flying a Diamond DA62 because it has the Garmin 1000 fitted.
The issue is that according to the specs the plane has a maximum speed of 317 kph. My issue is that the max speed according the speedometer is only 205 kph (red barber pole). Any attempt at exceeding this speed results in the destruction of the airframe, game over. Why the discrepancies in the speeds? i.e 317kph and 205 kph. I had used the twin jet Cessna and it’s kind enough to speak ‘overspeed’ not destroy itself. Any ideas?
Other more general issues are:
Not updating the fuel level.
Yaw trimming, buttons 4 and 6, the values don’t stick, but end up wandering back. Pitch 1 and 7 work just fine.
Keyboard/Joystick mapping is still a bit of a mystery. i.e. hints don’t work.
I had made a big run from Alice Springs to Darwin which took a long time to complete. About ten minutes before Darwin, the game just disappeared, so I lost all my accumulated hours. I’m still trying to reach the magic 50 hour mark.
Rather than do it in real time, I sped up the sim rate and did the trip successfully in an hour.
It’s most likely that the 317 kph that you mentioned is “True Airspeed”. While the 205 kph that you see in your cockpit is “Indicated Airspeed”. These two are different values. As indicated airspeed is just measured by the volume of air that goes through the sensors. The higher you climb, the thinner the air, so there’s actually less air that passes through the sensor, so the instruments are indicating a lower airspeed.
Usually, you need to speed up to maintain lift as the amount of air that passes through your wings are also thinner, so since you’re speeding up, your “true airspeed” actually increases. The higher the altitude you climb, the bigger the discrepancy gap between the two airspeeds.
Also, there’s another third type of speed. Ground speed. This is basically the speed in relative to the ground.
Make sure you’re not confusing your units between knots and kph. The DA62 has a cruise speed of around 320 kph (km per hour). That translates to about 200 kts. Your indicators in the plane show knots, not kph.
Take a few minutes and look up the topic of airspeed. Your airspeed indicator has lots of information on it including important “V” speeds.
The maximum permissible speed of any aircraft is called Vne - V for speed/velocity, and NE for “Never Exceed” or Vmo in commercial aircraft. That is in red indicated solid or like the barber pole as you mentioned.
Regardless of true airspeed, you can never fly faster than Vne or Vmo That’s not based on true, it’s based on indicated speed - what you can read off the airspeed indicator.
