Any
approved SAM Old Timer gas model airplane. By rule, North American Old
Timer
designs are limited to December
31, 1942 and older (Section I,
C). Other
designs
are limited to local SAM Chapter design date rules (Article XII, 2) but
in
no
case later than December 31,
1950. Scaling is allowed. The model’s
name and
design
year should appear on the model.
Minimum
loading will be 24.4 gr./sq.dm. (8
oz./sq.ft.) of planform wing area with
an
absolute minimum weight of 454 grams (16
oz).
Propulsion
must be a Graupner Speed
400 6 volt permanent magnet ferrite motor
without
ball bearings. Drive must be direct to a non-metal propeller of any
size.
Folding
propellers are admitted. After purchase timing adjustments are allowed.
The
battery may be six NiCad or NiMh cells, or two
Lithium chemistry cells of
any
capacity with manufacturer’s label clearly visible.
Any
RC on/off, ESC, and/or BEC power control system is acceptable.
Flights
may be hand launched with landing area determined by field
rules.
The
motor may be run only during the first
120 seconds of the flight; any running
of
the motor afterwards results in a zero score for that flight.
The
model is the entry in the event. A model may be entered only once in
this
event
but one contestant may enter two models of different designs without
regard
to
the builder of the model rule.
At
local contests a model's score will be the sum of the 2
best flights of three 15
minute
max flights. For postal contests, three models will constitute a team
entry
and
all three 15 minute max flights are to be reported and scored.