> Induction Air Filters
Induction Air Filters
CHALLENGER AIRCRAFT INDUCTION AIR FILTERS OFFER YOU:
- 2-4% Increase In Horsepower
- 50% More Filtered Airflow
- Filter Elements That Can Be Washed Up To 25 Times
- FAA/PMA Approval
- Fuel Savings
- Direct Replacement For Foam Or Paper Filters
CHALLENGER AIR FILTERS ALLOW YOUR ENGINE TO BREATH
An aircraft piston engine's power output is proportional to the volume of air it can ingest at a given RPM. The most
minute restriction in the air induction system will cause an engine's optimum power output to drop. Today's
aircraft engines, with restrictive air filters, run like a marathon runner breathing through a straw.
How Your Engine Operates
Aircraft piston engines go through four "strokes" during the combustion process: (1) Air intake, (2) Compression,
(3) Combustion, and (4) Exhaust. During the air intake stroke, the piston moves down the cylinder, sucking in a
new air/fuel mixture through the open intake valve. The intake valve closes and the piston moves back up the
cylinder, compressing the air/fuel mixture. At that point, a spark from the spark plug ignites and explodes the
compressed mixture. The explosion forces the piston back down the cylinder, producing the necessary power to
turn the propeller. Next, the exhaust valve opens as the piston pushes out most of the spent air/fuel mixture and
the cycle starts all over. The intake stroke of air/fuel mixture determines how much power the engine will generate.
Any restriction in the air intake will change the air/fuel mixture, wasting fuel and reducing engine power.
Fifty Percent More Air Flow
Challenger air filters consist of a reusable filter element with multiple layers of oil impregnated surgical cotton fabric,
sandwiched between two sheets of pleated epoxy-coated aluminum wire mesh. The element is held in place by
soft molded rubber surfaces, edges and end caps. This Challenger air filter design allows about 50% more air to pass
than paper, and almost 60% more than foam. This translates into 2 to 4 percent more horsepower and improved
fuel economy. Results may vary depending on how much your existing air induction system restricts air flow.
Performance filters by Challenger are now FAA/PMA approved for many general aviation aircraft as direct replacements
for existing induction air filters. Each filter can be washed and reused up to 25 times before it is considered no
longer servicable. The filter must be cleaned every 100 hours or sooner in dusty conditions, which means it can
last up to 2500 hours. For aircraft flying less than 100 hours per year, the filter must be replaced every five years
or sooner, depending on aircraft storage conditions.