LET’S TALK GIANT SCALE
Many carburetors need an
adapter for the existing arm that’s
secured to the carburetor, but
this often does not allow proper
servo travel. Zenoah Easy Link
Carburetor Adapter is a plastic
arm with a metal insert that has
a setscrew that secures the arm
to the carburetor. If you go this
route, a number of manufacturers
also offer various CNC throttle
and choke arms for Walbro
carburetors. I opted, however,
to make my own arm out of the
spare engine-mount material that
was supplied with the engine to
ensure that I obtained the proper
distance and range of travel.
Additionally, I prefer my adapter to
secure to two different positions
on the original arm using 4-40
bolts and locknuts.
As I did earlier with the engine-mount template, I cut a small piece
Tip of The Mon Th
While the engine discussed this month does not contain an
electronic ignition, you should always keep items like the fuel
tank, fuel lines, and battery cables away from the ignition
as well as areas where heat is generated by the engine and
Additionally, allow for proper cooling for the engine. The
bottom of the cowl of the Handley Page Type E is fully exposed.
On other models, allow in as much cooling air as possible
through the front inlets of the cowl. Generally, this outlet
should be about 2 1/2 times greater than the intake to allow hot
air to escape. Following proper cooling practices will result in
consistent engine performance in all weather conditions!
Modifications may be necessary when using a different engine. A saw is being used to
cut the nose section for the muffler. This area was later prepared, sealed using balsa
and epoxy finishing resin, and painted to match the fuselage color.
In a giant-scale gasser, use of thread-lock is mandatory wherever locknuts are
To save time and effort, use paper templates whenever possible to
ensure proper component sizing and positioning.
Using a paper template, I cut and drilled the throttle arm
so that I could bolt it to the existing throttle arm, which
didn’t have the correct throttle linkage geometry for this
particular application. The final assembly is secured using
two 4-40 bolts and their respective locknuts.