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The Caspar-Theis CT 1, CT 2, CT 4, CT 5
types are the same in terms of structure and construction and differ only slightly from each other. The differences lie in the installation of 80 hp Mercedes in the CT 1, 100 hp
Mercedes in the CT 2 and CT 5, 120 hp Mercedes in CT 4.
The Type CT 5 is equipped as a school machine with school control
The calculation of the bearing deck, etc., was carried out in accordance with the existing regulations and confirmed by load tests.
The span of the upper deck is 11.5 m, that of the lower deck 9 m and the surface depth above and below 1.4 m. The upper deck is staggered forward
against the lower deck and has a circular cutout above the passenger seat. The total wing area is 25 m2. The curb weight is 600 kg, the payload is 260 kg and the flight weight is
860 kg, the spec. wing loading is therefore 34.4 kg.
The engines are designed as single-arm double-deckers with normal bracing. The lower decks are hinged to the hull. The upper decks are attached to the middle deck supported by the canopy. The canopy is N-shaped and is made of teardrop-shaped steel tube. It is supported from the front and rear by a cable to the
lower edge of the fuselage.
The stem consists of two struts and two diagonal outcrossing cables. The middle deck accommodates the wing deck cooler in the middle, and a
drop tank is installed to the side of it. The wings are designed in normal design with two spars with fabric covering and cable crossing. The spars are milled out of the solid to double T-shaped cross-section. After milling, the rear spars have been planked with plywood on both sides. The ribbed construction consists of groove belts with
plywood webs and timber strips arranged in a truss-like manner. The ribs are designed from the inside to almost all the way out with a constant profile, only the end ribs with
a decreasing profile. The end strip has a round shape and is hollow.
The fuselage is built with four spars from normal bulkhead construction and plywood planking and ends in a horizontal cutting edge. The damping surface and the
keel surface also have normal wooden spars and ribbed construction, just like the wings. The spur is attached to a spur block made of tubular steel and cushioned with elastic bands.
The control surfaces and torsion flaps are made of tubular steel with fabric covering. The elevator and rudder are operated by cable pulls. The torsion flaps are operated by the control shaft in the fuselage by means of transverse levers, bumpers that engage on levers attached to aileron shafts running through the entire wing.
The chassis consists of two V-struts, which are connected at the bottom by two auxiliary axles. The front and rear strut levels are crossed out by steel cables. The
main axle is suspended in elastic bands. The suspension travel is limited by an interceptor cable. The engine compartment is separated from the main tank behind it by
a sheet steel bulkhead.