Dave Harding hands the stopwatch to Chuck Kime as they prepare Dave’s Boehle Giant during a
previous SAM Champs. Dave was this year’s SAM Champs manager. Photo by Steve Roselle.
Bob Galler displays a
stunning rendition of
the 1937 Ben Shereshaw
Cumulus design. Bob
completed the project that
Buzz Averill began.
SAM35 Speaks is the British version of the US SAM Speaks, the “house organ” of
the Society of Antique Modelers
(SAM). The British publication
has a different format at 6 inches x
81/4 inches, more pages, and smaller
print, so there’s plenty of reading
material in each issue.
Membership to SAM 35 is
approximately $83 per year, and it
includes the monthly publication.
I’ve been perusing some past issues
and find that the British writing
style uses more words, resulting in
An array of subjects is covered
in each issue such as FF, RC, CL,
rubber, gliders, scale, engines, and
rocket power (Jetex, CO2, and
such). The variety is made possible
through a large group of contributors
responsible for each protocol.
There is usually a technical idea (or
two) to which I hadn’t been exposed
or had never considered. For instance,
Jetex rocket motors lose weight as they
burn. That means a rear-mounted motor
design will undergo a significant CG
change, so a centrally mounted motor
would be a good idea.
Film Connections to Modeling
Camera film has a couple of
interesting connections to early
modeling. Before commercial model
adhesives were widely available,
modelers dissolved film in acetone to
make glue. Some of today’s cements,
such as Duco, are probably close
Jetex articles in SAM35 Speaks told of
another use for film. It was one of several
experimental materials used for model
rocket fuel. Film is extremely flammable,
so it was a hazardous process getting the
proper amount and shape packed into a
little rocket canister.
The cross-section of a modern (
full-scale) solid rocket motor normally
features a hollow star-shaped core. It
burns from the inside out. If ignition
started with a small round hole, there’d
be little initial thrust, followed by
exponentially increasing thrust as the
burning core enlarged. The internal star
shape can be designed to allow more
uniform thrust or even greater initial
thrust where it’s needed most.
The model rocket experimenters were
faced with similar
film. They tried
packing it into
various rolled or
cross sections. It
must have been a
resulting in one
per short flight.
sketch of Fred
began in the October 2014 “Old-Timers”
Fred had developed his green cabinets
of model supplies for display in retail
stores. He soon needed help to resupply
cabinets and continue his business
expansion. He began enlisting friends,
neighbors, and family as employees.
Sales were generally high volumes
of inexpensive (by today’s standards)
83 Model Aviation DECEMBER 2014
SAM35 Speaks tips and tricks