The second machine exhibited by the Caspar Werke is a commercial monoplane of small capacity, the cabin being arranged to carry but two people, seated vis-A-vis one another in a very narrow cabin. This machine is known as the type C.L.E. II, and is fitted with a Siemens radial seven-cylinder engine of 80 h.p. Thus the power expenditure per paying passenger is but 40 h.p., which should be a good commercial proposition. If the machine is piloted by its owner, and used for touring with a couple of friends, so that it becomes legitimate to count in the pilot in the useful load, the economy becomes even greater, i.e., 26.7 h.p. per occupant. Thus, for use on feeder lines joining up with main air routes, on which there is insufficient traffic to make a larger machine pay, the Caspar C.L.E. II should be a very useful and economical little machine.
As cheapness of construction was one of the desiderata, and clean aerodynamic design another, Ingenieur von Loessl chose the cantilever monoplane type, but incorporated a fuselage composed entirely of straight lines and flat surfaces, which could be easily and cheaply covered with ply-wood panels. It is, of course, well known that these panels can be bent around a cylinder but not around a barrel, i.e., not around a double curvature. Nevertheless, if the panels can be used without bending, their application to the internal framework becomes so much easier. In the C.L.E. II the fuselage is of rectangular section, with an inverted V roof and a V bottom in the forward part. Aft of the undercarriage the bottom is flat.
The undercarriage is of the form first made popular by Dornier, i.e., the axle is enclosed in a casing of thick aerofoil section, and the rubber shock absorbers are attached to the ends of this, cantilever fashion, giving a wide wheel track.
The wing is in three sections, a large centre portion and two relatively small end pieces, attached to the main wing by special quick-release fittings. In the centre, above the " roof tree " of the fuselage, the wing is attached by simple hooks, and is braced farther out by struts sloping out at a fairly flat angle.
Behind the trailing edge of the wing is the pilot's cockpit, and immediately under the wing the tiny cabin with accommodation for two passengers. The space is rather cramped, especially as regards leg-room, and also to a certain extent as regards head-room. One passenger faces aft and the other forward, and the cabin is of only sufficient width to give elbow space, and not much of that if the passengers be Germans of average, bulk. As in the case of the biplane, the monoplane is covered entirely with three-ply, and it was noticed that in the bottom of the fuselage there were no diagonal members to stiffen the ply, which was not more than 1 or 1,5 mm. thick.
The main characteristics of the Caspar C.L.E. II are as follows : Weight, empty, 450 kg. (1,000 lbs.) ; useful load, 360 kg. (790 lbs.) ; total loaded weight, 810 kg. (1,790 lbs.). The maximum speed is 160 km. (100 m.p.h.), and the landing speed 80 km. (50 m.p.h.). The range is approximately800 km. (500 miles).

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Type CLE 11 from Caspar-Werke.
The aircraft is intended as a feeder aircraft [for 2 passengers for use on less frequented routes. During the design, particular emphasis was placed on cost-effectiveness and
operational reliability.
In order to achieve low production costs, the lines were as straight as possible. The hull is constructed as a truss
with wooden planking; the wing, 4 canopy struts connected to the fuselage, is self-supporting, the sliding fittings attached in the middle
are used to absorb the forehead pressures and other horizontal forces. Particularly noteworthy are the good aspect ratio, also in the tail, relatively high power load (10.375 kg/hp) and avoidance of any protruding part that could cause unnecessary drag. Because the wooden outer skin of the wing, as has been proven beyond doubt by the earlier tests of the firm, bears the load, the wing skeleton could be held very lightly despite the relatively large wingspan.
Very interesting is the design of the quick-release fasteners for the fastening of the wing tips, the construction of which consists of the adjacent fasteners. Fig. The 80 hp
Siemens radial engine is mounted on a fold-out engine shield so that the engine can be easily checked and replaced before and after each flight. A fireproof wall is installed between theengine and the cab.
The short landing gear sits directly under the fuselage and is equipped with a! wing-like cladding. The main data of the machine are as follows: wingspan 12 m,
wing depth 1.6 m, maximum length 6.65 m, maximum height 2.2 m, engine 80 hp Siemens - Star, air-cooled, empty weight 450 kg, payload 380 kg, total weight 830 kg,
number of seats: 1 driver, 2 passengers, speed,.160 km/h