What do the numbers 100/130 in AVGAS indicate?

Rome through the General Aircraft Technical Knowledge Exam. Dive deep into the core concepts of aircraft operation. Tackle multiple-choice questions and detailed explanations to ensure you soar to success. Prepare meticulously and conquer your test!

Multiple Choice

What do the numbers 100/130 in AVGAS indicate?

Explanation:
The numbers on AVGAS represent the fuel’s octane rating, i.e., its resistance to detonation (knock) in a spark-ignition engine. Aviation fuels use a two-number designation to show performance under different mixture conditions. The first number is the anti-knock rating when the engine is run on a lean air-fuel mixture, and the second is the rating when the engine is run on a richer mixture. So 100/130 means the fuel resists detonation as well as a 100-octane fuel under lean operation and as well as a 130-octane fuel under rich operation. Higher numbers indicate greater resistance to detonation, enabling more aggressive timing or higher compression without knocking. This designation isn’t about fuel flow rate or a color code.

The numbers on AVGAS represent the fuel’s octane rating, i.e., its resistance to detonation (knock) in a spark-ignition engine. Aviation fuels use a two-number designation to show performance under different mixture conditions. The first number is the anti-knock rating when the engine is run on a lean air-fuel mixture, and the second is the rating when the engine is run on a richer mixture. So 100/130 means the fuel resists detonation as well as a 100-octane fuel under lean operation and as well as a 130-octane fuel under rich operation. Higher numbers indicate greater resistance to detonation, enabling more aggressive timing or higher compression without knocking. This designation isn’t about fuel flow rate or a color code.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy