http://www.x-plane.com/adventures/60_so_thats_how_its_done.html This article covers well how an attitude indicator does or doesn't work.
On Wed, Jul 13, 2016 at 1:36 PM, Gary Stevenson <[email protected]> wrote: > Hi John, > > Nice to see a bit of practical reality (obviously from experience), > infused into this scenario. I haven’t the slightest doubt that you are 100% > right. > > > > Your comment on wind speeds aloft is very pertinent, but if high winds > aloft are forecast , I suggest that you would not take a launch anyway??? > Would you agree that in – just to pick to a number - 90% of cases, a wind > speed of 80 kts at FL 185 is unlikely? > > > > High moisture content of the air in Victoria is not unusual on wave days. > This can induce a high (95% plus), proportion of mid-level cloud formation. > I call this situation “wet wave” and it can be deadly, when the Fohn > gap closes under you. > > > > If you don’t have a dedicated AH - NOT a phone app – and know how to use > it you could end up dead. If you intend to fly in these conditions , > fitting a turn and bank indicator to your panel as well as the AH seems to > be a good idea. > > > > Having said that, I recently heard a rumour that some phones are now > fitted with some sort of gyro???/alternative system. All this is outside > my experience, but this rumour seems somewhat unlikely. Does such a system > exist? How does the average phone AH work anyway, and what are its > failings? > > > > Comments please. > > > > Regards, > > Gary > > > > *From:* John Gwyther [mailto:[email protected]] > *Sent:* Wednesday, 13 July 2016 8:08 PM > *To:* Gliding Australia Forum > *Cc:* [email protected] > *Subject:* [gfaforum] Re: SkySight and Wave > > > > Yep, very nice looking but, down here in Gippsland NW of Sale, we've had > cu-nims and snow showers all day. Previous attempts to fly in these > conditions resulted in getting cut-off horizontally and vertically from a > safe return. Also, whilst the wave is there, the winds aloft (70-80 knots > at FL185) would make it very hard to move along the wave without going > backwards downwind. > > > > I've been tracking his wave forecasts on this site and they seem to line > up pretty well with local experience. One can also get good visual > confirmation with the new Himawari-8 BOM satellite. > > On Wednesday, July 13, 2016 at 11:04:15 AM UTC+10, Paul Mander wrote: > > Take a look at the wave display for today on Matthew Scutter's new > forecasting package, SkySight. > > It shows the possibility of a flight in wave from Bunyan to Bairnsdale to > Kempsey; 1020 km, if one could address the airspace issues. > > That possibility is exciting, but it also demonstrates the usefulness of > the SkySight model. I recommend it. > > -- > You received this message because you are subscribed to the Google Groups > "Gliding Australia Forum" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at > https://groups.google.com/a/glidingaustralia.org/group/gfaforum/. > > _______________________________________________ > Aus-soaring mailing list > [email protected] > http://lists.base64.com.au/listinfo/aus-soaring > >
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