This is a photo of nuclear fuel bundle being lifted from the reactor core. The characteristic blue glow of nuclear reactors is due to Cherenkov radiation or charged particles exceeding the speed of light in a medium.
The Napier Sabre. A hugely complicated 37 litre H deck piston aero engine, with 2 cranks and a geared common output shaft. Some test engines were putting out almost 6000hp by the end of WW2. Replaced by the much simpler jet engine.