Air Craft

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Roger JUNQUA`s research and ultimate choice were guided by low fuel consumption and low construction coast. As the fuel consumption was becomming an increasing important factor of operating cost, it was necessary to look to a low-powered aircraft, while also striving to develop a plane that was reasonably fast, in order to reduce even further the kilometer/passenger cost ratio.
Two criteria which are not easy to merge!
But, by adopting the "canard" formula, Roger JUNQUA was able to obtain the considerable gains following:

"given equivalent weight and power, a classical aircraft maximum speed is equal to a canard cruising speed, which means in effect that, at equivalent speeds, the power requirements of a canard aircraft is only three quarters that of a classical aircraft.
Therefore a 55 hp engine would appear the adequate minimum at sea level (approximatively 700 t/mn 180 km/h (97 Kts - 111 MPH) at two-thirds power). A 65 hp is more suitable for this aircraft, but 80 hp overpowered, as it would cause excess fuel consumption.
The fuel consumption of this aircraft would thus be
13 l/h (3.4 USG) at 200 km/h (110 Kts) i.e. 6.4 litres (1.7 USG) per 100 kms (54 nms - 62 miles)
10.7 l/h (2.8 USG) at 185 km/h (100 Kts) i.e. 5.8 litres per 100 kms (54 nms - 62 miles) in economic conditions (28 hp).
The range provided by this configuration is more than 900 km (486 NMS - 560 SM), at a cost three times lower than that of second-class rail travel, not including depreciation.
To obtain such results it was necessary:

to build simple and light
to develop improved aerodynamics

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