On his latest video the comments are "This flight was to test the take off roll and climb performance with the gross weight about 50lbs heavier than I'd had it previously."
This seems the perfect thing to have done during his 40 hour phase 1 testing.
This whole engine run seems like a dumpster fire. Rough running engine, then wrong battery, etc. I'd expect this more from a guy who built everything himself rather than from a group of pros who were paid to build the aircraft for him.
tires, shop supplies, etc. Go at least 10$ for all maintenance items, so you'd be at $25/hr total for a dry rate. Convince him to go by tach time and that will save you about 10% over hobbs
That page is vortilon-less.
Velocity designer Danny Maher put wing cuffs on a few early kits and lengthened the trailing edge and changed the aft inboard camber to address the deep stall issue.