Lead in the air

日期:2017-05-11 06:24:41 作者:濮捆箅 阅读:

By Barry Fox A recent patent from British Petroleum makes a disturbing admission: piston-engined aircraft need such high-octane fuel that tetraethyl lead is still added to it to keep its octane rating up. So while all new cars can now use unleaded fuel, aircraft engines are still dropping lead from the sky. In WO 98/22556, BP claims a new high-octane fuel which is a mix of triptane, iso-pentane, iso-octane, toluene and methyl tertiary-butyl ether. This, says BP, raises the octane number to over 100,