Extreme Cold Start WWII Propeller Airplane Engines Ignite with Mega Sound

During World War II, fighter aircraft were expected to fly in all kinds of weather, including freezing temperatures. In cold conditions, starting the engines of these planes could be difficult and loud. Mechanics used heaters, fuel primers, and sometimes even torches to warm up the engine and oil systems. Without proper heating, the oil would thicken, and the engines could seize or fail to turn over. Once the propeller began to spin and the cylinders fired, the sound was deep, rough, and powerful—especially after a long cold soak.

British Spitfire and American P-38

The British Supermarine Spitfire used a liquid-cooled Merlin engine. Starting it in freezing conditions took time, as the coolant could freeze and crack engine parts. Crews often used canvas covers and hot air blowers to warm the engine bay. Once started, the Merlin produced a sharp, roaring growl that grew louder as the RPMs increased.

The American Lockheed P-38 Lightning had twin engines, making cold starts more complicated. Each Allison V-1710 engine had to be heated and primed. The engines were sensitive to cold oil, and without proper prep, they could stall or run rough. When both engines fired up, the aircraft gave off a heavy, thunderous tone that echoed across the airfield.

P-47 Thunderbolt and P-51 Mustang

The Republic P-47 Thunderbolt used a radial engine that handled cold better than liquid-cooled types. But even it needed heat and fuel mixture adjustments. Once fired, its engine produced a strong, deep rumble. It was loud and unmistakable.

The P-51 Mustang also used the Merlin engine, like the Spitfire. Cold starts were similar—slow and cautious. The first ignition often caused flames at the exhaust ports as unburned fuel caught fire. The sound built into a smooth, fast-paced roar as the engine warmed up.

P-40 Warhawk and German FW 190

The Curtiss P-40 Warhawk had a liquid-cooled engine as well. Ground crews had to warm the coolant and oil. If done too quickly, it risked damage. Once the engine caught, the P-40 released a gritty, steady hum.

The German Focke-Wulf FW 190 used a radial engine like the P-47. It responded better in cold weather, but it still needed time. Mechanics had to carefully turn the propeller to avoid hydrolock. When it finally fired, it gave off a sharp bark followed by a loud, chugging beat.

Keep going for the video below: