Bob English’s imaginative artwork brings this common Ringmaster to life. Bob is a member of the
Society of Antique Modelers Chapter 51 near Sacramento CA. Photo by John Eaton.
twice the power of an Ohlsson & Rice
. 23, it wasn’t much heavier, and was
sometimes used as a substitution. Not
many engine-mount dimensions were
interchangeable, but the Mighty Midget
happened to fit the Ohlsson & Rice
mounting holes, with space left over. We
had real hot-rod CL airplanes when that
swap was made.
Gits caps are little, spring-loaded,
pop-up lids that many of our old spark-ignition engines use as fuel tank caps.
They provide a nice dust cover, and with
their large openings, no other tank vents
are needed or used. The fit is normally
loose enough that replacement air flows
in freely as fuel is used. It’s rare, but
occasionally those caps fit snugly enough
to seal off the replacement air.
When that happens, an engine will
usually start fine, run for a while, and
suddenly quit. Because many things can
cause that to happen, it can drive you
nuts trying to solve the problem.
Many lists about why your engine
won’t start (or run) have been published
throughout the years, but I’ve never
seen that cause listed. If you suspect this
as a problem, slip a small wood sliver
under the cap and try again. If that cures
the problem, make a little notch in the
opening of the neck for a permanent fix.
Incidentally, a Gits cap is one old
engine part that’s still readily available
from industrial suppliers and auto
parts stores. It is usually a press-in
fit. There are multiple sizes, so you
need to measure the tank opening
before you make a purchase. The Gits
Manufacturing Co. caps and similar
products are usually referred to today as
AMA History Project
Gits Manufacturing Co.
90 Model Aviation DECEMBER 2016 www.ModelAviation.com