Who was Siepen?

At 20:36 29 May 2007, Johan Larson wrote:
On May 29, 1:25 pm, Ian wrote:
On 29 May, 20:44, Johan Larson wrote:

I'm still working on the article these pictures came
from, but the
pictures are ready now:

Was that a 1929 article describing progress to date?
Some of the
gliders look rather older. I've love to know what
the tailless one
is ...

The article describes the gliding movement as it was
at the time in
Germany, with a bit of discussion of earlier times.
I would guess
Siepen visited Germany in '28, and took the pictures
during the trip.
Of course, some of the gliders in use at the time would
have been
built much earlier.

Johan Larson