proportional to the electrical power required to run
the
radios.
lights.
etc. and charge the battery. When all accessories are
eurrled off, ally airperage reading on the lneter
will
be that which
is
chargirig the battery.
The Elecrl-ical Panel
The
electrical parlel
is
divided ir~to two parts:
a,
The electrical toggle swiec:hes
which are on the lower %eft
side
of
the
pilot's panel and which act
in
con~binarion both
as
ori-off switches arid
as
hrea1te.r switches. Should any of
these
c:ircuirs
be
overloaded, the
switch
autoinatica%Iy turns
to the "off" position. These switches are, front left to right:
1.
'['he elec~trical
fuel
pun-~p
2.
Arl
optional equiprnent switch
3.
An optional equiprnent switch
4.
The gitot heat (if insralled)
5.
The
rotating beacon
(if
installed)
6.
'The navigation lights
7.
The
Eandir~g light
b.
The breaker switches which are located on the lower right
*
side
of
the copilot's panel, are covered by a special breaker
switch
cover,
These
switches are
of
eke push-to-reset
evne.
The structure of the Mark
21
is of conventional all-rnetal design.
The
cabin section corlsists of tubular steel structure covered
with
aluminuum sheet metal. The firewall
is
stainless steel. The
wing, stabilizer, and fin have a main spar design and an aux-
iliary spar with stressed skin to carry torsional loads. The tail
cone
is
a conventional monocoque design. The seat design fea-
tures
contoured sheet metal construction.
The entire empennage pivots around two attachment points to
the tail cone to provide stabilizer trim.
A
screw mechanism
actuates the empennage movement at the rear bulkhead when
the trim control wheel is operated.
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