Many thanks Ivan! That is comforting to know (and i'm not surprised ;)
Any idea what was done with the glider wings? They would be a good candidate
for an IAS/density alt table :-)
Thx 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 tak
en to the speed but then tested [short stick and rudder raps] to see if any f
lutter mode could be excited at Vd. I have performed these tests at/up to 80
00ft . We have never experienced any flutter mode. I also tested the tail pl
ane underbalanced and over balanced with the same results. To my knowledge w
e have not had any reported flutter incidence on the entire fleet. As you me
ntioned Pete did exceed Vd on a few occasions.
>
> Ivan
>
> From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-ser
ver@matronics.com] On Behalf Of Tim Ward
> Sent: 04 January 2018 22:01
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Are Vne and Va IAS or TAS?
>
> I am sure Peter Clark would have done those manoeuvres in the flight testi
ng. Must look at his notes again.
> Tim
>
> Sent from my iPhone
>
> Tim Ward
> 12 Waiwetu Street
> Fendalton
> CHRISTCHURCH 8052
> Hom 03315166
>
> On 5/01/2018, at 10:43 AM, Pete <peterz@zutrasoft.com> wrote:
>
> Great article Will, thx!
>
> I wonder now how the europa was tested wrt Vne and if Vd was tested/is spe
cified, if there is a IAS/density altitude table, and if the the published V
ne is structural or flutter?
>
> Is Ivan lurking? ;-)
>
> Cheers,
> Pete
>
> On Jan 3, 2018, at 7:23 AM, William Daniell <wdaniell.longport@gmail.com> w
rote:
>
> Pete
>
> I found this http://www.australianflying.com.au/news/vne-and-flutter-expla
ined
>
> What do you think think?
>
> Will
>
> William Daniell
> LONGPORT
> +57 310 295 0744
>
> On Jan 1, 2018 22:19, "William Daniell" <wdaniell.longport@gmail.com> wrot
e:
> Mmmm....why the difference? The way I read the article it says that TAS i
s the critical value. For most pilot this discussion is irrelevant because
the real issue occurs at altitude. However since we all fly here regularly
at over 12k often in mountain turbulence this is very relevant.
>
> Anyway luckily my dynon shows IAS TAS and GS and for now I'll stick with T
AS as the key value.
>
> William Daniell
> LONGPORT
> +57 310 295 0744
>
> On Jan 1, 2018 21:43, "Pete" <peterz@zutrasoft.com> wrote:
> Oops.... I mis-stated. VNE=TAS. Va=IAS
>
> On Jan 1, 2018, at 9:29 PM, Pete <peterz@zutrasoft.com> wrote:
>
> TAS from my research.
> https://www.vansaircraft.com/pdf/hp_limts.pdf
>
> Cheers,
> Pete
>
>
> On Jan 1, 2018, at 9:15 PM, William Daniell <wdaniell.longport@gmail.com> w
rote:
>
> I seem to recall a discussion on this but I can't find it on the list.
>
> At 12000 ft DA at which I was flying today, the difference is between IAS a
nd TAS is 20 kts or roughly 20%.
>
> Thanks in advance Will
>
>
|