Peter,
Sorry if this is a repeat message. My email keeps changing itself from text to HTML, so my previous post on this subject would have come through blank for some. ? You are correct about the pitot system and stall speed.? However, flutter is all about velocity of the air rather than pressure of the air.? I'll suggest reading this article: <https://www.vansaircraft.com/pdf/hp_limts.pdf>, specifically starting at the last paragraph of the first page and continuing into the second page.? ? I'm open to discussion on the subject as I have been wrong before and will likely be wrong again. :o)? The above article was written after an RV got into a flutter situation causing damage to the aircraft during a rapid descent from a high altitude flight, even though the pilot kept the plane well below VNE and had mass balanced controls.? I'm sure the story could be easily found via a Google search. ? Best regards, ? -Jeff ? Sent:?Thursday, July 31, 2014 at 11:30 AM From:?peter <jordanruthseto at aol.com> To:?jscott.planes at gmx.com, krnet at list.krnet.org Subject:?Re: KR> counter balanced elevator Jeff; small correction- 190 IAS is aerodynamically equal to 190 TAS @ standard conditions. Your pitot reacts to the dynamic pressure of impacting air molecules, independent of density altitude,? just like your flight surfaces will, so flight testing to 215 IAS has been demonstrated without flutter. Congrats. Peter ? ? I routinely descend from 12,500' to 7000' for landing with the ASI showing 190 mph IAS, which is roughly 220 mph TAS at those altitudes. ?
