-essential parameter=propeller surface loading (Thrust Force/ Surface,

[kG/ m^2]...

and Specific Thrust (Thrust Force/ Mechanical Power ,

[ kG/ kW].

in auer CR case (GREEN KASPERWING) 80 kG / 15 kW= 5.3 kG/kW...

at 80 kG/ 1.3 m^2 =62 kG/m^2.

in modell (0.7/1.3 m ) from 0.96 kW accu power (24 V x 40 A)

we get 15 kG Thrust Force... (circa 16 kG/kW !)

(upper right corner)

BTW=probably SWIFT AERIANE is TUCK REZIST !

(BKB1-A is more stabil, thanks wingtips extensiones...)

=very small control surfaces (winglets/rudders) !!!