Tag: from certified to experimental.
![The 160 hp turbocharged Rotax 916iS is a four-stroke piston engine with redundant electronic fuel injection and ignition. [Credit: BPR Rotax]](https://kitplanes.com/wp-content/uploads/2026/05/PIC_916-iS_iSc-2.jpg?w=324&h=160&crop=1 "2026 Engine Buyer’s Guide")
In Case You Missed It
RANS S-7S Courier
Marc Cook pilots the new RANS S-7S and finds many improvements, from increased fuel and storage capacity to a simplified aileron-control system that makes handling better than ever.
Wind Tunnel
Multiple engines complicate design, because not only must the airplane be able to maintain flight on one engine, but also the pilot must be able to control it. Lateral/directional stability issues are key;
