Mr. Karl-Hugo Larsson, an inventor
and innovator, holding a Master of Engineering- Diploma from the
Royal Collage of Technology in Stockholm, Sweden, was the Constructor
of the Stimparavanes.
The late Karl-Hugo Larsson was born on the beautiful but barren
island of Fårö, far out in the Baltic, where his father
ran a grocery. All his long life he lived with a very strong emotion
for “his” island, with its distinctive and necessity
need for an engagement in fishing and shipping. Maybe he had the
fishery much at heart, as his childhood was strongly influenced
by the importance of the catch for the local people to survive and
all the ruthless losses of men and boats which constantly followed
him in mind.
His academic ability carried him to Stockholm and the Royal Collage
of Technology, where he was registered at the Institute for Naval
Architect. His exam followed by years of practical work at the shipping
yards in northern Germany.
His interests in the development of ship-construction and the security
of the crew on ships put him into the position of ship-surveyor
with a working field all over the world.
His earlier developed “trawl-board” was one of these innovations
considered pioneering-work to the fishery-fleets. At his practical
contacts with the working fishermen he learned that in spite of their
skilled steer of the ships and the trawl-boards there was still a
certain need of some improvement to increase the catch. He realized
that it was necessary to widen the opening of the trawl. After a long
time of scientifically calculations based on "aerodynamic theories"
and tests Mr. Larsson solved the problem by constructing his paravane,
a shoe-alike 45 cm long unit, imagine the old-fashion Dutch wooden
Göran Löwgren at an expo.
The paravane struggles to go to the depth away from
the tow-line. By “turning the right side up” of some
units on the under-wire of the trawl and some “up and down”
on the over-wire he got the gap of the trawl to widen. Tests made
by independent fishermen show catches increased up to 50%.
Later he remembered the behaviour of the paravane and Stim
63 and Stim 97 were facts.
His innovated works led to several articles in recognised international
periodicals within the fishery industry. Many of the inventions
made by Karl-Hugo Larsson have been patented in several countries;
among the patents are Stim 63 and Stim 97. This
genuine paravane is still an entirely Swedish product.
Mr. Larsson opened the manufacturing with an innovative factory
owner within the plastic-industry, whose children today cast the
body of the Stimparavanes and the owner of the products now, Göran
Löwgren, has lived in close relation to the constructor.