Sky writing

While on a smaller scale, the local model shop rc guru said I should mount
the ten dollar extra cylinder cooling water jacket they sell for rc cars to
the fins of the head of my motor and their twenty dollar smoke kit which
was a bit of high temp tubing and a servo operated valve that squashed the
tubing to cut off flow. Pressure is supplied to the tank via a tapped
fitting to the motor crankcase that required removing the back plate
drilling and tapping a hole and inserting the fitting. This was to suit an
OS46, so it wasn't a large rc motor.

Heating the oil prior to injecting it gave more smoke. I do not know if this
would help on most airshow type high powered display aircraft, but would
expect some sort of preheat would give much more smoke on a smaller, lower
horsepower aircraft. This could be as simple as leaving the drum of oil out
in the sun (or on the combustion stove in Alaska) before filling your smoke
oil tank.

Hope this helps,
Peter


"Jim Fisher" wrote in message
...
"Viperdoc" wrote in message
A smoke system includes a tank, pump, and orifice in the exhaust
manifold.
This system allows the smoke oil to get vaporized.

So is the oil is injected directly into the manifold through this orifice
or
is there some more complicated, separate mechanism for heating up the oil?

--
Jim Fisher