This is my second attempt to calculate the frontal area of my KawaBanana and this time I remembered to put the rectangle of white card of known size back near the rider's hip where the perspective would not make it look larger than life. So, cue roll of drums, the more accurate measurement of frontal area including rider is 10.9 square feet, which seems, quite a lot! But it does explain why strong headwind gusts were able to reduce my speed from 55mph to 45 mph at whim on the way home from Wales after 680 miles. And unfortunately I cannot reduce the frontal area or size of the fairing much without reclining the rider further as his arms and head and feet are already visible.
Derived from the size of the number plate in a photograph the Voyager is not 10.9 sq ft like me but only 8.1 sq ft meaning I am 22% bigger! No wonder Voyagers do more to the gallon even at higher speeds!
Using this admittedly crude way of gauging the cross sectional area of bikes gives the area of a Quasar as only 6.48 sq ft with the rider on board, albeit calculated from a tiny photo which was the only straight-on rear photo I could find, and assumes that the Quasar in question had a number plate 9.5 inches by 7.5 inches. However the Quasar is noticeably the narrowest of the bikes mentioned here and of course the rider's limbs are more exposed as the bikes get narrower.
Actual drag of these bikes is a completely unknown figure to me, I need a University to offer to test them all :)
(Arthur later added his bikes areas - VFFF 7 sq ft, TDFF(no fairing) 5 sq ft, both with rider - so the TDFF has half my bike's frontal area!)