HELICOPTERS
Frank Piasecki was the
holder of the first US helicopter
pilot's licence and
he formed his own company in 1943
to develop practical
rotorcraft. He developed the first
successful tandem
rotor configuration helicopter and
retained this configuration
for his subsequent designs.
A developed version of
his original models flew in 1952
and was ordered by
the USAF as the YH-21. Over 500
examples of the H-21
family were built for the USAF
and Army and they
formed the basis for the later
Boeing-Vertol series
of tandem helicopters.
A smaller helicopter
using the tandem configuration
but discarding the
"flying banana" shape, the HUP/H-25
was developed in 1949,
and 339 were produced for the
US Navy and US Army.
This CD set contains
the flight manual for the YH-21
and the HUP/HU-25.
This CD has been copied from
the original flight
manuals and retains any colour pages.
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