Looking for 300ft in the air at departure end, in a Janus (assume two
seats
loaded) at max GW take off from a 2200ft long runway is very optimistic.

Our 260 HP Pawnees normally get around 600 fpm at 65 knots with a Janus
(or Grob Twin for that matter) with two people. That's a climb angle of
about 1:11. OK, so you can get a better angle with a slower speeed, but
not *that* much better.

Great explanations..
Our 235HP Pawnee will average about 400-500fpm with a two up 2-33 or Grob
103.
And we break ground with about 1500ft runway remaining... so.. about 200ft
at departure end.
We are lifting off at about 55KIAS and towing at 60 for a 1-26 and 65 for
the Grob.

BT