weight of an airplane has a direct influence on its
The design Philosophy of the SD-1 is as light as possible
while simple to built airplane, good performance and
handling suitable also for low time pilot. Historically
the lightest airplanes have always been made of wood. Every
boy has tried to glue together a wooden plane or boat. The SD-1 is really just a bigger model, so the
average builder should have no problem finishing the plane.
The development of new materials continues non-stop.
We are now seeing items in daily use made of carbon composites,
with its incredible strength and light weight. Its strength/weight ratio deserves its
use in places with high load concentration like spar caps and
Top properties are achieved using pultrusion technology. This fully automated process
quality of production and mechanical properties. This is the
reason why we use it in spars and reinforcement of fuselage.
The main spar of wing
weights 2 kg
(ultimate load 7,5 g).The MTOM/empty
weight ratio achieves value 2,1. The design is maximaly simple. The ribs of wing and tails are
made of extruded polystyrene. Whole plane is covered with plywood
and composites are used on the complex shapes only. The
engine power range is from 23 to 50 HP what should fulfil
requirements of every pilot.
Assembly and disassembly of plane is possible to perform by one
person in a short time. The plane fulfils requirements of both FAI UL and LSA regulations
and also new German up to 120 kg category. The aim of our company is the best possible support for builders
of this plane and promotion of “small” aviation for everybody.