In article SPI3e.2906$ZV5.894@fed1read05,
"BTIZ" wrote:

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.

300 ft AGL after 2200 ft is a climb angle of nearly 1:7. The actual
1:11 a Pawnee gives would give you 200 ft AGL after 2200 ft. And that's
assuming that you *start* with runway already with full flying speed.
In reaily you're going to need about half the runway just to get up to
climb speed. And then you're going to have to climb at about 2000 fpm.

Not going to happen.


I'm not sure what the performance would be with the Wilga... but I'm
guessing not much better.

When we tried a Wilga at our club we found that the tow turnaround was
shorter, but it was because the Wilga came down faster not because it
went up faster.

--
Bruce | 41.1670S | \ spoken | -+-
Hoult | 174.8263E | /\ here. | ----------O----------