The Nazi Natter was made of wood, filled with 24 offensive rockets, and propelled by another, larger rocket. If that sounds like something only an insane person would fly into combat, congratulations on not being a Nazi pilot at the end of World War II. These "grass snakes" were supposed to win the war. They did not.
I would write an intro about how, in the end days of World War II, Germany was short on manpower, territory, and resources, but nearly every article about Germany's failed super weapons starts that way. So, just, you know, remember that Germany was desperate at the end of World War II because Hitler was high on drugs and horrible at planning ahead when he invaded his neighbors.
So, on the list of harebrained schemes that the Nazis turned to in order to stave off their inevitable defeat, the Natter has to be one of the craziest. Basically, because they were low on metal and airstrips and they thought rockets seemed awesome, the Nazis made a single-use, vertically launched, rocket-powered plane that only fired rockets. These were supposed to be "grass snakes" that rose from the forests of Germany and slaughtered Allied bombers.
Oddly enough, the Germans were also critically short of the C-Stoff fuel for the more conventional Me-163 rocket fighter, but they went ahead and used the same fuel for the Natter anyway, leading General of Fighters Adolf Galland to tell a colonel that:
...because of a special SS initiative, a defensive surface-to-air rocket aircraft is supposed to be forced into production. And they will be propelled by C-Agent as well. That is the height of stupidity, but it's also fact.
"Eh, needs more rockets."
(Anagoria, CC BY 3.0)
Oh, and, worst of all, the planes couldn't land without breaking apart.
The Natter, officially designated the Ba-349, was made primarily of wood. It would be strapped to a tree or, in its test flights, a special but cheaply built tower. They would then fire four solid boosters to get the aircraft into the sky before the main rocket motor could kick in.
Assuming everything didn't go to hell during that not-at-all-dangerous process, the pilot could then maneuver onto incoming bombers and fire up to 24 rockets at them. Since the Natter flew at over twice the speed of a B-17's max, the pilots really needed to fire their rockets accurately and quickly before they overshot their target.
Once they were out of ammo, the pilot would release the nose and deploy the parachutes. The nose would fall separately from the rest of the plane and, hopefully, the parts would land safely. The parts and the pilot would be recovered and ready for another round.
"This will save the war."
(San Diego Air and Space Museum Archive)
It, uh, did not work properly. On the second unmanned test flight, the flight components hit the ground with fuel remaining. That fuel blew up, destroying the plane. But because the blast wouldn't have—necessarily—killed the pilot, they went ahead with a manned flight.
That flight went worse. No offense to the Nazi test pilot. On March 1, 1945, Lothar Sieber took off in a Ba-349, but it immediately started flying inverted and climbed into cloud cover. It emerged from the clouds a few minutes later and crashed into the ground, miles away.
The pilot was dead, either from the shock of takeoff, the canopy flying off in flight, or the crash. The plane was destroyed. And everyone finally gave up on the idea of the Natter.
Not that it would have changed much if it had been controllable. The western Allies crossed into Germany about two weeks later, and a few rocket-powered fighters wouldn't have stopped the advance. But, hey, "Grass Snake" at least looks cool on a T-shirt.
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