On May 28, 11:16*am, Roel Baardman wrote:
First of all: thanks for all the replies!
I find it incredibly interesting to ponder about these subjects, so more info is
better :-)
I also like the Ls-6 story!

My tendency with the B4 is to approach with too much velocity, often 100 km/h.
This gives me the feeling I have proper aileron control, so it's intentional.
When I approach the deck and slowly start to bring the nose up, I encounter the
ground effect that the B4 has. I either float for a long time before touching down
with a two-point landing, or I make a touchdown on the main wheel only (sometimes
with a slight jump after that).
What happened yesterday, was that I was so busy compensating for crosswind (I
don't want to have a traversed landing), that started floating again and gained
some altitude (1 meter roughly).
Knowing that the fault is probably in the velocity, I approached the instructor to
learn from his B4 experience.
I agree that the B4 is very friendly and benign. I will put effort in bringing my
approach speed down to 90 in the upcoming flights.

Slightly too much airspeed at the start of the flare will have a large
effect on float distance. The big culprit is ground effect which can
as much as double the glider's L/D just as you are trying to land
making it hard to get rid of that extra airspeed.

I choose a small airspeed increment over the yellow triangle according
to the gustiness of the day and use that for my "over the fence" (OTF)
airspeed. In the pattern, I'll use whatever airspeed give me a good
gust-stall margin then slow down to the "OTF" airspeed on short final.