Tag Archives: Wernher von Braun

3 October 1942

Aggregat 4 number V4 ready for launch at Prufstand VII, 3 October 1942. (Bundesarchiv)
Aggregat 4 prototype (probably V-3) ready for launch at Prüfstand VII, August 1942. (Bundesarchiv, Bild 146-1978-Anh.026-01 146-1978-Anh.026-01)

3 October 1942: First successful launch of a prototype Aggregat 4 (A4) rocket, V-4 (Versuchsmuster 4), from Prüfstand VII at Heereversuchanstalt Peenemünde, or HVP, the Army Research Center at Peenemünde on the island of Usedom, off the Baltic coast of Germany.

The rocket engine burned for 58 seconds and the rocket reached an altitude of 85–90 kilometers (53–56 miles) and traveled approximately 190 kilometers (118 miles) downrange. Although V-4 did not reach the Kármán line at 100 kilometers, the currently accepted altitude at which space begins, this Aggregat 4 is still considered to have been the first rocket to reach space.

Major General Walter Doernberger, a German military officer and doctor of engineering who was in command of the V1 and V2 development programs, said, “This third day of October, 1942, is the first of a new era in transportation, that of space travel.”

A-4 rocket launch Peenemunde, 3 October 1942. (NASM)
Aggregat 4 (prototype V-4) launch from Prüfstand VII, Peenemünde, Germany, 3 October 1942. (NASM)
V-2 rocket launch at Peenemünde, on the island of Usedom in the Baltic Sea. (Bundesarchiv)
Aggregat 4 (V-2) rocket launch at Peenemünde, on the island of Usedom in the Baltic Sea. (Bundesarchiv)
Dr. Frhr. Wernher von Braun
Dr. Frhr. Wernher von Braun

Development of the A4 began in 1938 under Dr. Frhr. Wernher von Braun. The first prototype, Versuchsmuster 1  (V-1), was being prepared for launch on 18 April 1942. During test runs of the engine, it was badly damaged and was scrapped. Prototype V-2 was launched 13 June 1942 and reached approximately 15,000 feet (4,572 meters), but the guidance system failed and the rocket crashed into the Baltic Sea a short distance from the launch site. V-3 suffered a structural failure, 16 August 1942. V-4, the fourth prototype Aggregat 4, was the first successful flight.

The V2, or Vergeltungswaffen 2 (also known as the A4, or Aggregat 4) was a ballistic missile with an empty weight of approximately 10,000 pounds (4,536 kilograms) and weighing 28,000 pounds (12,700 kilograms), fully loaded. It carried a 738 kilogram (1,627 pound) (sources vary) explosive warhead of amatol, a mixture of TNT and ammonium nitrate. The propellant was a 75/25 mixture of of ethanol and water with liquid oxygen as an oxidizer.

The complete rocket was 14.036 meters (46.050 feet) long, and had a maximum diameter of 1.651 meters (5.417 feet). The rocket was stabilized by four large fins, 4.035 meters (13.238 feet) long, with a maximum span of  3.564 meters (11.693 feet). The leading edge of these fins was swept 60°, and 3°. A small guide vane was at the outer tip of each fin, and other vanes were placed in the engine’s exhaust plume.

Cutaway illustration of a V-2 rocket. (U.S. Army)

When launched, the rocket engine burned for 65 seconds, accelerating the rocket to 3,580 miles per hour (5,760 kilometers per hour) on a ballistic trajectory. The maximum range of the rocket was 200 miles (320 kilometers) with a peak altitude between 88 and 128 miles (142–206 kilometers), depending on the desired range. On impact, the rocket was falling at 1,790 miles per hour (2,880 kilometers per hour), about Mach 2.35, so its approach would have been completely silent in the target area.

The V-2 could only hit a general area and was not militarily effective. Germany used it against England, France, The Netherlands and Belgium as a terror weapon. More than 3,200 V-2 rockets were launched against these countries.

V-2 launch site.
V-2 launch site.

© 2016, Bryan R. Swopes

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