On Wednesday, September 6, 2017 at 9:46:16 AM UTC-4, Dave Nadler wrote:
On Tuesday, September 5, 2017 at 9:24:25 PM UTC-4, Andy Blackburn wrote:
On Tuesday, September 5, 2017 at 6:04:49 PM UTC-7, Dave Nadler wrote:
On Tuesday, September 5, 2017 at 8:23:23 PM UTC-4, wrote:
I don't recall any glider I have flown reacting to a horizontal gust
by pitching down.

IIRC Genesis does this a tiny bit - initially disconcerting but of
no consequence as it stabilizes promptly (it's a nice flying bird).
JJ ??

IIRC vertical gusts activate the short period (AOA) mode and pitch the
aircraft down while horizontal gusts activate the phugoid (airspeed) mode
and pitch up (if the gust is on the nose). These are kind of fundamental
aspects aircraft stability. Anything else might lead one to check the
c.g. People sometimes confuse the type of gust they are experiencing.

Andy
9B

Absolutely, I was thinking of vertical gust response,
no idea why the OP mentioned horizontal gust response as that is
generally not an issue...

Possibly because the original poster was not clear about what kind of gust he was talking about. Both Andy and I chosed to address both possibilities.
UH