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Bachem Ba-349 Natter

Bachem Ba-349 Natter History

The Bachem Ba-349 Natter (Viper) didn’t see combat, but came very close. Erich Bachem designed the Natter as a low cost point defense fighter. Theoretically the aircraft addressed many of the drawbacks of other aircraft. Instead of a runway it would take off from a near vertical rail. In wind tunnel tests up to Mach 0.95 it didn’t show any compressibility problems. Since the aircraft wasn’t meant to land it didn’t need a runway. Prior to attacking the bomber formation the pilot would jettison the rocket boosters. After completing the attack the pilot was to jettison forward section of the aircraft. This would enable the pilot to parachute to earth. The rear of the aircraft, which contained its rocket engine, would descend by parachute for reuse. The rear of the aircraft would be mated with a new forward section and be ready to fly another mission.

The Germans began glider tests with the Natter in November 1944. The unpowered Ba-349s were dropped from He-111s and the pilots tested the Natter’s handling characteristics. A test pilot named Zübert reported the aircraft had excellent flying characteristics. Pilotless launches of the aircraft began on December 18, 1944. The first two launch attempts were failures. The first successful launch was on December 22, 1944. Over Erich Bachem’s objections the Germans made the first piloted test launch of the Natter on February 28, 1945. The plane crashed killing the test pilot, Leutnant[i] Lothar Siebert. There were six other piloted test flights. In April 1945 at Kirchheim, the Luftwaffe put 10 Natters on launch rails. Each had 33 x 55-mm R4M air-air missiles in their nose.[ii] A single R4M rocket could destroy a heavy bomber. There they awaited the arrival of an Allied bomber stream. The bombers never came. When the Allied ground forces came the Luftwaffe personnel destroyed the aircraft on their rails.

[i] Equivalent to a USAF 2nd Lieutenant. Lothar Siebert was posthumously promoted to Oberleutnant.

[ii] Warplanes of the Third Reich by William Green © 1970 p68-69.

What if?

Had the bombers come before the tanks and if all went according to the Luftwaffe plan. The Natters would have launched from their rails with an initial climb rate of 37,400 ft/min. Radio control would have taken the Ba-349s to within a mile of the bombers at speeds up to 620mph. Then the Natter pilots would make their attacks and unleash their salvo of rockets against the bombers. They would have shot down 6-8 heavy bombers and then the Natter pilots and the rear sections of the aircraft, with the Walter HWK 509C-1 rocket engines, would parachute to earth. Germany would have surrendered on May 8, 1945 and the mission would have been a deadly footnote to the air war over Germany.

A Doomed Concept?

How would the Ba-349 concept have played out had the war continued? What if the Germans had the time to produce large numbers of these aircraft? A hundred Ba-349s with their fantastic speed and enormous firepower could make attacking the target area they’re defending too costly. Since they would be launched from rails the Allies would not know with confidence which targets the Ba-349s were defending on a given day. These factors would seem to make the Ba-349 a weapon system with a reasonable chance of defeating a strategic bombing campaign.

One key element with the Ba-349 concept was the behavior of American fighter pilots. The Natter pilots would fire a barrage of missiles at the bombers then promptly make themselves Hors de Combat[i] . Would the American fighter pilots, and their superiors, have accepted the Hors de Combat status of the Natter pilots or would they have viewed this as a manipulation of the rules and the Natter pilots fair game as they hung in their parachutes? This would make Natter pilots suicide pilots. The descending rocket engines would be legitimate targets while descending in the parachutes and while they lay on the ground. It is an academic exercise to consider which tactics or weapons systems could have stopped the World War II Allied bombing campaign. The question of honoring the laws of war against an enemy that attempts to manipulate those laws is an ongoing question. In this theoretical Ba-349 scenario strict obedience to the laws of war means losing the campaign.

[i] Literally – out of Combat. The laws of war prohibit someone who is incapable of fighting from being attacked.

Ba-349B-1 Specifications

Source: Warplanes of the Third Reich, by William Green, (c) 1970

Total thrust

8,760 lbs

Armament Options

24X73mm rockets, or 33x55mm rockets, or 2x30mm cannons

Max Speed


initial climb


Max Range

36 miles

Max Endurance

4.36 minutes

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.

© 2014 Robert Sacchi


Robert Sacchi (author) on August 24, 2018:

Not at all. It brings out the best and the worst in people. There are many examples of both.

Peggy Woods from Houston, Texas on August 23, 2018:

So true. War brings out the worst in people despite some people trying to abide by some rules that show some respect for morals. Is that an oxymoron?

Robert Sacchi (author) on August 23, 2018:

That is always a question. Even within countries that adhered to the laws of war there are people who violate them.

Peggy Woods from Houston, Texas on August 23, 2018:

"The question of honoring the laws of war against an enemy that attempts to manipulate those laws is an ongoing question."

In this day and time with terrorist attacks on innocent people, I doubt that the "laws of war" are taken into consideration. I know that some countries still consider them and (hopefully) adhere to them. We live in dangerous times! People going about their daily business can suddenly become targets. That is sad.

Robert Sacchi (author) on August 04, 2018:

The rule exists. The question I posed was hypothetical since the war ended before this aircraft went into combat. Would the American pilots have viewed the idea of a plane coming out of nowhere at high speed, launching their missiles and then the pilot bailing out, as abusing the law of war? What if these aircraft had become an unqualified success?

Peggy Woods from Houston, Texas on August 04, 2018:

That is very interesting that there once was a rule as this: "The laws of war prohibit someone who is incapable of fighting from being attacked." I would guess that rule no longer exists?