The Klemm 25e
Now that we have built up a few gliders from the vintage segment, it was obvious to construct a suitable towing machine. It took several months to reach a decision. But at some point it became clear that it could only be a Klemm!
And then it actually happened relatively quickly. Within six months, we have completed the prototype to such an extent that the woodwork is almost complete. There is still some work to do, the wiring, the installation of the engine and of course the finish.
Our prototype is equipped as a "workhorse" and therefore has an atypical stable chassis.
Philip Kolb has calculated the profiles especially for this model for us - and we are really very grateful for this. The stall characteristics of the model should be minimized and the good sailing characteristics supported. A small break in style resulted from the fact that our wings are equipped with airbrakes. However, the ribs are designed in such a way that it is up to the individual to do the same or not.
The basis for the fuselage structure is a fuselage box, which receives its special stability through the jointing of all parts. The intended canopy area has an opening of around 77 cm. This provides generous space for batteries, RC installation, fuel tank, etc., which is also easily accessible. The fuselage is 2.27 m long, with removable rudder it is 2.09 m. The elevator has a span of 1.02 m.
The wings are fitted with a 30 mm STRONGAL plug with 1.5 mm inner wall, which runs through the complete centre section - length 100 cm. Due to the straight underside of the ribs, there is no need for a jig or feet for the construction. One wing has a length of 1.63 m, the middle section is 43 cm wide in total. The root rib depth at the central section is 58 cm.
The prototype was planked with 0.6 mm birch plywood.
Unfortunately the first flight in Wächtersberg didn't quite work out. However, we are very optimistic, that we' ll be able to complete our maiden flight before the event in Röttingen.
Further information and pictures of the construction of the prototype can be found HERE