LessDragProd(at)aol.com
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 Posted: Thu Mar 29, 2007 9:18 am Post subject: TAS and Vne & Flutter at Altitude |
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I was told that the MU-2 has an airspeed indicator that shows the critical airspeed for that flight altitude. The critical airspeed is shown as a moving (red?) line on the IAS indicator.
Another method I've heard of using is an indicated airspeed to a fairly low altitude like 10,000' and a limiting Mach number above that altitude.
Part 23 identifies a maximum operating airspeed (Vmo) and a maximum operating Mach number (Mmo) as airspeed limits. Where Vmo is an IAS? And Mmo as a fixed Mach number is a varying TAS? (Mach 1 being about 760 knots TAS at sea level to about 660 knots TAS at 35,000?)
The RMI Microencoder in my RV-3 can provide a Mach number readout. I haven't tried it, but if I remember correctly, I can input a set point for an audio alarm and/or flashing display to the Mach number.
BTW, I estimated a limiting Mach number of about 0.26 for 230 mph TAS at 10,000'. Anyone have a better number?
The Dynon D-10 & D-10A provides a TAS readout when their OAT is used. I understand that there is no provision at this time for an alarm on the TAS.
Anyone have information on their flight system and the ability to set an alarm on TAS or Mach number?
Regards,
Jim Ayers
See what's free at AOL.com.
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