and practice says even more definite no) for max efficiency you need to increase prop SIZE and DECREASE pitch. increasing pitch plays only good for lower props in coaxial schemes, where airflow is already speeded up by the top prop.14x10 props? Theory says a definite "NO" on that - pitch ratio greater than 50% (i.e. 14x7) will result in blade stall at hover.
The Orbit 15-20 look promising, but you have to wait for 8 weeks to get them and the are quite expensive. Any suggestions?
... probably not so much fun to build ...
I'm coming around to the same idea, my only multi at this stage is a 1.3 kg quad, and I can fly that anywhere without concern. With a 5kg octo, every flight had a pucker factor, and always aware of what could happen when that 5 kg decides to come down unplanneHaving gone full circle from massive Oktos with many confs. that could lift more than 20 kilos. the Penny finally dropped and MR's do have a place. For me they have to be small and transportable. float on water and have full prop. protection. Have same stability in the wind as in the calm. And be able to operate as a one man show. Fortunately cameras are also set to get better and smaller so it all comes together nicely.
My 2 cents worth.
I'm coming around to the same idea, my only multi at this stage is a 1.3 kg quad, and I can fly that anywhere without concern. With a 5kg octo, every flight had a pucker factor, and always aware of what could happen when that 5 kg decides to come down unplanne
The new go-pro2 looks good, and won't be long until there are a bunch of sub 200 gram cameras with decent quality pics