Bud
Does this apply even at the upper altitude range ....say 13k or 15k?
Will
On Jan 4, 2018 22:19, "Bud Yerly" <budyerly@msn.com> wrote:
Yep Graham,
Airplanes only feel air pressure, not the velocity of the molecule alone.
Dynamic pressure is =C2=BD Density times Velocity Squared or IAS (actuall
y you
have calibrated then equivalent) is what the airplane feels. Those RV guys
got all hung up on this and confused everyone.
Bottom line, what you read on the airspeed indicator counts. TAS is
important (actually Mach number) as the skin heats up due to friction which
is a different ball of wax. I was always a slow speed aero guy to match my
mind.
Regards,
Bud Yerly
Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for Windo
ws
10
------------------------------
*From:* owner-europa-list-server@matronics.com <owner-europa-list-server@
matronics.com> on behalf of Pete <peterz@zutrasoft.com>
*Sent:* Thursday, January 4, 2018 5:49:37 PM
*To:* europa-list@matronics.com
*Subject:* Re: Europa-List: Are Vne and Va IAS or TAS?
Hi Ivan, just to confirm, Vd IAS @8000ft DA?
Thanks again!
Pete
On Jan 4, 2018, at 5:21 PM, <ivanshaw@btinternet.com> <
ivanshaw@btinternet.com> wrote:
All our company aircraft were tested to Vd, 10% over Vne. And not just
taken to the speed but then tested [short stick and rudder raps] to see if
any flutter mode could be excited at Vd. I have performed these tests at/up
to 8000ft . We have never experienced any flutter mode. I also tested the
tail plane underbalanced and over balanced with the same results. To my
knowledge we have not had any reported flutter incidence on the entire
fleet. As you mentioned Pete did exceed Vd on a few occasions.
Ivan
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