I have now gathered most of the parts needed for the refined version.

-Same motor, speed controller and 20ah batteries
-Refined drive system using timing belt and alloy pully's using a very similar gear ratio predicted prop rpm 2050
-All up weight of 15kg including harness and 20ah batteries.
-Small light weight aluminium frame with composite protection ring, all collapsible to fit into a suitable ruck sack.

Possibly the lightest powered flying machine? Imagine using this with a light weight paraglider like the hiking/mountain gliders that weight less than 3kg

Construction starts when i get a bit more time from work.