Flow XCRacer loaded up at 3/4 of it's weight range. The trim speed of this wing is 21kn/39kmh, when the glider is up 50 pct speedbar is applied and the glider flies off at walking pace. without speedbar it would hover in place at 21kn.
Some people do not understand what the guy is doing "holding" the harness from behind. He is a redundancy, a safety back up. He doesn't actually apply any force, he is mirroring the movements of the pilot, following him, not slowing him down, not pulling, he is there if something goes wrong. Which in this case, nothing went wrong, so if he wasn't there the take off would be exactly the same.
Its the same with reserves no? You carry one every time you fly, you don't throw it every time do you? But its there if you need it.
