Thanks, Jim. Yes, one is a VSI (on the left, presumably feet per minute) and
the other an indication of vertical speed in knots. I never understood how the
latter worked, nor exactly why the pilot might need it.
Chris
> On 30 May 15, at 19:07, Jim Nichols <jhnichols@xxxxxxxxxxxxx> wrote:
>
> Link:
> http://www.gallery.leica-users.org/v/OldNick/Sailplane+Instruments.jpg.html
>
> Jim Nichols
> Tullahoma, TN USA
>
> On 5/30/2015 1:05 PM, Jim Nichols wrote:
>> Chris, I tried to get as sharp an image as possible, but there isn't much to
>> see. From some on-line searching, I gather that sailplane pilots like to
>> have variometers that show both the vertical speed of a rising thermal
>> column and the vertical speed of the aircraft. Maybe that information is
>> provided by these instruments, but the details have to be in the head of the
>> pilot.
>>
>> Neither of these is a g-meter. I think the markings give vertical speed in
>> knots.
>>
>
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