|
Although I have never owned or
run one of the vintage ignition type model airplane engines, the articles telling
of their operation makes me glad that glow engines were the powerplant du jour by
the time I entered the modeling realm in the late 1960s. Just as the smaller A−size
and smaller glow fuel engines are generally more finicky to start and adjust to
run consistently, so were the similar sized ignition engines - like the Arden .099
probably was. Persistence and anticipation of the joy of hearing a model airplane
engine fire up and scream - and of course the smell of the burning glow fuel - as
you prepare to launch the craft skyward is what made all the hassle worth it. My
friends and I spend untold amounts of time struggling to get our Cox .049s started
and running well enough get a few turns around the control line circle before the
carefully tweaked needle valve setting no longer caused the engine to run as it
did a few short moments ago. Still, we never gave up - and, truthfully, never did
much better at getting the danged things to run consistently through full
tank of glow fuel.
The Inside Story of the Arden .099 Engine
 Superior Performance
A steel piston that is centerless lapped to give perfect fit to the cylinder.
Serves to reduce frictional loss of power while maintaining perfect compression.
The ball and socket joint permits piston to rotate as it reciprocates ... even distribution
of wear.
360° exhaust and intake portings. Exhaust gases, expelled radially at bottom
of stroke, are replaced by incoming fresh fuel having jet spray feed. Results in
perfect operation and starting dependability. A one-piece steel cylinder with 20
cooling fins permits continuous operation at high speeds without overheating.
Radial engine mount that facilitates solid, 360° flush mounting directly
to the fire wall. Reduces possibility of excessive vibration.
Timer design features a screw adjustment for fixed timer point ... a friction-free
earn roller ... a beryllium copper timer arm, all of which insures efficient timing
even at excessive speeds. Note unique housing which serves to protect entire timer
assembly against seepage of oil and dust.
360° exhaust and intake portings. Exhaust gases, expelled radially at bottom
of stroke, are replaced with incoming fresh fuel having jet spray feed. Results
in perfect operation and starting dependability. A one-piece steel cylinder with
20 cooling fins permits continuous operation at high speeds without overheating.
Radial engine mount that facilitates solid, 360° flush mounting directly
to the fire wall. Reduces possibility of excessive vibration.
Timer design features a screw adjustment for fixed timer point ... a friction-free
earn roller ... a beryllium copper timer arm, all of which insures efficient timing
even at excessive speeds. Note unique housing which serves to protect entire timer
assembly against seepage of oil and dust.
Price Complete
with coil and condenser
Ball Bearing type ...... $22.50
Plain Bearing type .... $ 19.50
Ask your supply dealer or write for information
Micro-Bilt Incorporated
370 Lexington Ave. New York 17, N. Y.
Articles About Engines and Motors for Model Airplanes, Boats, and Cars:
Posted August 8, 2020
|
