The Reid and Sigrist R.S.3 was a British twin-engined three-seat advanced trainer developed in the Second World War for postwar use. Although the R.S.3 was evaluated as a trainer the type never entered production and was eventually rebuilt as the R.S.4 Bobsleigh as an experimental aircraft with the pilot in a prone position seen as advantageous in minimising g-force effects in fighters.
Made by Reid and Sigrist.
It is the successor of the Reid and Sigrist R.S.1 .