What You Should Know About Aircraft Superchargers

Superchargers are engine-driven air pumps that give the engine additional pressure to the induction air, which results in additional power. Superchargers have the capability to boost manifold pressure above 30 “Hg.

Superchargers help to compress air at higher altitudes, allowing the aircraft to produce the same manifold pressure as it would if it were at mean sea level (MSL). If an aircraft were at 8,000 feet, its engine might produce around 75 percent of the total power it could produce if it were flying at sea level.

The Superchargers used in aircraft becomes extremely beneficial at higher altitudes (above 18,000 ft). At high altitudes, the air density is 50 percent than that of at sea level. Using a supercharger, in that case, supplies air to the engine at the same density it would if it was still at sea level.

In normal operating conditions the supercharger is in a low blower position during takeoff. The engine acts as if it is ground-boosted, and while the aircraft gains altitude, the power output decreases. Once the aircraft reaches the desired altitude, power is reduced, and the supercharger is switched to a high blower position. Once that position is reached, the throttle is set to the desired manifold pressure.

Some Key Benefits of a Supercharger

• Increased horsepower –from 50 to 100 percent increases

• No lag –Immediate power delivery

• Low RPM boost –Good power at low RPM

• Cost-effective way to increase aircraft horsepower –turbochargers are much more expensive

• No special shut-down procedure –Not lubricated by engine oil, can be shut down normally

Disadvantages of a Supercharger

• Can consume as much as 20 percent of the engine’s total output –turbochargers can have the same results, with less energy consumption

• Puts added strain on the engine –high temperatures and pressures could cause damage to the piston head if not designed properly

• Expensive to install and maintain –high-octane premium-grade gas is suggested, parts are more heavy-duty, making them more expensive

ASAP NSN Parts is a leading distributor of NSN parts and manifold assembly parts. With a continuously increasing inventory, you can be sure ASAP NSN Parts will have everything you need and more. We will ensure all needs are addressed in a timely and professional manner. ASAP NSN Parts is known for finding cost-effective solutions for radial engine parts. For a quote from a premier aircraft impeller parts supplier, reach out to the main office by phone: 714-705-4780 or by email: sales@asap-nsnparts.us

1. john parker
2. Posted on August 1, 2018
aircraft components

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