Except that 100 small propellers will be condiderably less efficient than one large prop.

Why ? Ok, lets say one and fourth ?

An example of better airframe for electrification compared to lazair

SPECIFICATIONS:

Wing Span: 35.4ft:

Length: 19.68 ft.

Wing Area: 105.5 ft.2

Empty Weight: 250 lbs.

Max Flight Weight: 470 lbs.

Useful Weight: 220 lbs.

Propeller (wood): 51.2" x 22.8"

Engine Hp Direct Drive: 24. Hp at 3200 rpm

Engine weight complete with prop = 86 lbs.

Operating G-loads +4, -2

Stall speed: 25 mph

Max-VNE: 78 mph

Glide Ratio: 16:1

Climb: 5 5 0 ft./min.

Take off distance (grass): 150 ft.

Landing Distance 180 ft.

Sink Rate: 3 1 2 ft/sec. at 40 mph

Note: Performance figures are with a 165 lb. pilot, at sea level, at standard conditions, and with the 24hp motor.

Please pay attention to glide ratio, and ic engine weight and rpm... And best climb speed

This one should cruise with 3kw of power. And 85 lbs + fuel - will allow to put 1.5 tesla battery modules. 7kwh of useful energy

The question is - go with one two or three propellers.