Model Airplane News

INSTALLATI­ON

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If you are thinking of installing a smoke pump, you will need to gather some of the following materials:

Smoke-pump unit

1 or 2 check valves

Battery pack (4.8 to 6V)

Fuel tank for your smoke fluid Fuel-filler dot

Zip-ties

Gasoline-proof fuel line

Neoprene tubing

T-fittings

Some pilots use the aerobatic airplane they fly for IMAC (sequence competitio­n) for their freestyle competitio­n. Since smoke isn’t needed for IMAC routines, making a removable tray to support the smoke tank, pump, and pump battery is a simple and quick way to save a pound or more in weight. If your model is a tad on the heavy side, give this idea some thought.

Start by installing the smoke tank. If there’s room, I prefer to mount my fuel tank and smoke tank close to the airplane’s center of gravity (CG). This way, as fuel and smoke fluid are used up, the CG of the model will remain the same throughout the entire flight. With your fuel tank and smoke tank located

 ??  ?? To avoid changes in CG balance point as fuel and smoke fluid are depleted be sure to position the tanks at or very close to the model’s center of gravity.
To avoid changes in CG balance point as fuel and smoke fluid are depleted be sure to position the tanks at or very close to the model’s center of gravity.

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