Blade Length (radius) : 1.2 m
So the disk area of the rotor should be approximately 4.52 m². With 10 m/s wind speed, the rotor thrust is 710 N. This looks to be a very high value, leading to a thrust (mainly lift, and also drag) coefficient (Ct) above 2.5 (if air density = 1.2). @Rodread, please how do you obtain a so high Ct? Are these co-axial auto-gyros intended to better lift (stacked) Daisy, or to adjust the extent of the misalignment?
On an old publication, page 45 (“Lift And Drag Coefficients Were Obtained Through 90 Degrees In Gliding Tests With The PCA-2”), we see a lift coefficient (Cl) (curve in black circles) of about 0.9, and a drag coefficient (curve in red squares) of about 0.6, with an AoA of 30 degrees. That cannot lead to a Ct of about 2.5.