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There are serious differencies between the requirements for fuel metering in automotive and aircraft piston engines. The car engine use feedback from oxygen sensor (Lambda probe) in the exhaust to keep the air/fuel mixture close to the stoichiometric ratio. This is necessary for effective...

A thoroughly optimized twin tractor can be fantastic. The cruise speed will be directly comparable with that of jet, but the taktoff and landing distances will be second only to helicopter. What could one say about cruise at 400 knots and stall at 50(IF THIS IS STALL)? At least one plane with...

I have serious doubts if the pusher configuration of Piaggio Avanti can improve performance. The blades of propellors positioned just behind of the trailing edge encounter powerful strikes of the wake trace during each revolution. this definitely does not enhance efiiciency/ Moreove, if the prop...

The Performance of Altania plane is quite consistent with its small dimensions and is not actually improved by the pusher design. Rather the long drive shaft from the center-mounted engine is nothing more than an unnecessary complication. The clasiic side-by-side tractor plane will be shorter in...

Overall efficiency of a pusher prop is alvays lower than that of a tractor one. The additional drag of slipstream is often overestimated. Instead, the slipstream can (and in many cases do) improve the L/D ratio of the plane! This results from two physical mechanisms: 1. The high-speed slipstream...