From Wikipedia"
The de Havilland DH 82 Tiger Moth is a 1930s biplane designed by Geoffrey de Havilland and was operated by the Royal Air Force (RAF) and others as a primary trainer. The Tiger Moth remained in service with the RAF until replaced by the de Havilland Chipmunk
in 1952, when many of the surplus aircraft entered civil operation.
Many other nations used the Tiger Moth in both military and civil
applications, and it remains in widespread use as a recreational
aircraft in many countries. It is still occasionally used as a primary
training aircraft, particularly for those pilots wanting to gain
experience before moving on to other tailwheel aircraft, although most
Tiger Moths have a skid. Many are now employed by various companies
offering trial lesson experiences. Those in private hands generally fly
far fewer hours and tend to be kept in concours condition. The de
Havilland Moth club founded 1975 is now a highly organized owners'
association offering technical support and focus for Moth enthusiasts.
The Tiger Moth trainer prototype was derived from the DH 60 de Havilland Gipsy Moth in response to Air Ministry specification 13/31 for an ab-initio training aircraft. The main change to the DH Moth series was necessitated by a desire to improve access to the front cockpit
since the training requirement specified that the front seat occupant
had to be able to escape easily, especially when wearing a parachute.
Access to the front cockpit of the Moth predecessors was restricted by
the proximity of the aircraft's fuel tank directly above the front
cockpit and the rear cabane struts
for the upper wing. The solution adopted was to shift the upper wing
forward but sweep the wings back to maintain the centre of lift. Other changes included a strengthened structure, fold-down doors on both sides of the cockpit and a revised exhaust system. It was powered by a de Havilland Gipsy III 120 hp engine and first flew on 26 October 1931 with de Havilland Chief Test Pilot Hubert Broad at the controls.
One distinctive characteristic of the Tiger Moth design is its differential aileron
control setup. The ailerons (on the lower wing only) on a Tiger Moth
are operated by an externally mounted circular bellcrank, which lies
flush with the lower wing's fabric undersurface covering. This circular
bellcrank is rotated by metal cables and chains from the cockpit's
control columns, and has the externally mounted aileron pushrod attached
at a point 45° outboard and forward of the bellcrank's centre, when
the ailerons are both at their neutral position. This results in an
aileron control system operating, with barely any travel down at all on
the wing on the outside of the turn, while the aileron on the inside
travels a large amount upwards to counter-act adverse yaw.
From the outset, the Tiger Moth proved to be an ideal trainer, simple
and cheap to own and maintain, although control movements required a
positive and sure hand as there was a slowness to control inputs. Some
instructors preferred these flight characteristics because of the effect
of "weeding" out the inept student pilot.
1 comment:
Nice model!
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