Optimum thermalling speed display

I probably thermal too slowly and with too much bank. Lately it seems every time I try to open up the turn even a little I blow out the edge of the thermal.
Having an instrument to yell at me might improve my thermalling, or really **** me off!

On Tuesday, September 25, 2012 9:29:44 PM UTC-7, kirk.stant wrote:
With all the new (and some of the older - SN10 for example) vario-computers having accelerometers and settings for ballast and polars, would it be possible to compute and display the optimum thermalling speed adjusted for wingloading and bank angle (as a function of instantaneous G-loading)? Since we don't (yet) have AOA gauges (which would do a better job of indicating the correct speed to fly in a thermal), I'm curious if a simple "speed to fly" indication would work. Obviously, filtering a constantly varying G-load would have to be employed, but I'm thinking of a 2-3 knot speed band display - using the same fast-slow indicator used for cruise speed control - preferably also with a deadbeat digital readout of the optimum speed to thermal for an average of the past 3 seconds or so of turn/averaged G. Would this work? Probably only once established in a steady, smooth turn - but that would give a good starting point for the next thermal. Kirk 66

Last year I became a syndicate partner in a lovely LS7 (without
winglets). Our panel contains an LNAV which has the optional g
meter and the climb tone changes in lift if the angle of bank is too
great and the glider approaches the stall. Best thermalling speed is
just slow enough for the tone not to change. It is even possible to
change the ballast setting on the LNAV; works for us.

I am always struck by the inability of bloggs to bank at 45 degrees.
The screws on the panel trick works and many are quite surprised
at how steep this feels. They are then even more surprised by how
much the stalling speed goes up!

Tally ho!

John

Last year I became a syndicate partner in a lovely LS7 (without
winglets). Our panel contains an LNAV which has the optional g
meter and the climb tone changes in lift if the angle of bank is too
great and the glider approaches the stall. Best thermalling speed is
just slow enough for the tone not to change. It is even possible to
change the ballast setting on the LNAV; works for us.

I am always struck by the inability of bloggs to bank at 45 degrees.
The screws on the panel trick works and many are quite surprised
at how steep this feels. They are then even more surprised by how
much the stalling speed goes up!

Tally ho!

John

Two thoughts on this:

1) There is no substitute for practice.
2) If you need a computer for everything you might as well let the computer
fly the glider. Why have the middleman?



At 10:58 28 September 2012, John Roche-Kelly wrote:
Last year I became a syndicate partner in a lovely LS7 (without
winglets). Our panel contains an LNAV which has the optional g
meter and the climb tone changes in lift if the angle of bank is too
great and the glider approaches the stall. Best thermalling speed is
just slow enough for the tone not to change. It is even possible to
change the ballast setting on the LNAV; works for us.

I am always struck by the inability of bloggs to bank at 45 degrees.
The screws on the panel trick works and many are quite surprised
at how steep this feels. They are then even more surprised by how
much the stalling speed goes up!

Tally ho!

John

On Friday, September 28, 2012 6:30:03 AM UTC-6, Jim White wrote:
Two thoughts on this:



1) There is no substitute for practice.

2) If you need a computer for everything you might as well let the computer

fly the glider. Why have the middleman?

I'm confused, Jim: Do you have a vario in your glider? Or a glide computer? PNA?

How does having real time information on a variable performance value (min sink speed for current conditions) equate to letting the computer fly the glider?

Kirk

Check these videos and pass them around.

https://www.youtube.com/watch?v=EO9nXPRkWKk

https://www.youtube.com/watch?v=EO9nXPRkWKk

On Monday, August 14, 2017 at 8:58:21 PM UTC-4, wrote:
https://www.youtube.com/watch?v=EO9nXPRkWKk

Both links above are for part 1.
Part 2 is he
https://www.youtube.com/results?sear...+thermalling+2

Uli
'AS'