Enzian
| Company type | Military missile project |
|---|---|
| Industry | Defense |
| Founded | 1943 |
| Founder | Messerschmitt (Dr. Herman Wurster) |
| Defunct | 1945 |
| Fate | Project cancelled |
| Headquarters | Germany |
| Products | Surface-to-air missile |
The Enzian was a German WWII surface-to-air missile developed as an anti-aircraft weapon and notable for being the first to incorporate a radio control guidance mechanism.[1] However, during its late-war development phase, the project was hindered by organizational challenges and ultimately discontinued before achieving operational status.
Its designation derives from a genus of alpine flowers, known in English as the gentian.
Development
By 1943, it became apparent that the Me 163 interceptor faced significant operational limitations. Although capable of reaching altitudes between 25,000–30,000 ft (7,600–9,100 m) to intercept Allied bombers, it had only a brief window to engage before fuel depletion. Even when successful in reaching the bombers, targeting weapons accurately at speeds nearing 400 mph (640 km/h; 350 kn) proved problematic.
In response, Messerschmitt’s Dr. Herman Wurster proposed the Flak Rakete 1 (FR-1) concept in 1943. Instead of pursuing bombers directly, this rocket would fly ahead of the target formation and detonate a 500 kg (1,100 lb) explosive warhead designed to damage multiple aircraft simultaneously.[2] Freed from pilot constraints, the rocket employed four solid-fuel booster units (Schmidding 109-553), collectively generating approximately 7,000 kg (15,000 lb) of thrust mounted externally.[3] This arrangement minimized fuel requirements for the subsequent climb phase powered by a liquid-fueled sustainer motor—the Walter RI-10B designed by Hellmuth Walter Kommanditgesellschaft.[4] The sustainer engine consumed a mixture of SV-Stoff (red fuming nitric acid) and Br-Stoff (petrol), ignited via a catalyst of T-Stoff.[5] Despite carrying a heavy warhead, this design enabled a compact airframe suitable for launch from modified 88 mm gun mounts.[6]
To conserve scarce wartime materials, construction utilized wood extensively,[7] reflecting resource shortages as Germany’s situation worsened. A novel version of the Walter rocket engine was also developed to burn coal-gas (benzine) instead of hydrogen peroxide used in earlier models; however, a small amount of peroxide remained necessary for pump operation. The thrust was reduced during flight from 2,000 kg (4,409 lb) to about 1,000 kg (2,205 lb).[8]
Visually reminiscent of the Me 163 with swept wings and elevon control surfaces,[9] the missile was intended to be guided primarily through ground-based radio commands. Operators would direct it near bomber formations before shutting down the engine to allow it to glide toward targets. This approach introduced challenges absent in other German missiles that flew directly along line-of-sight trajectories—making terminal guidance more complex when approaching from ahead rather than behind or alongside targets. Previous experiments with radio and wire guidance had revealed difficulties in executing precise final adjustments.
To address this, designers planned to install an onboard radar system named Elsass within the spacious nose section.[10] Initially, proximity fuzes were to be employed during passage through bomber formations to trigger detonation; however, these proved difficult to perfect.[11] Various warhead designs were considered aiming for an effective lethal radius near 45 m (49 yd).
Multiple iterations were developed from FR-1 through FR-5 configurations. The FR-5 was deemed suitable as a baseline for further work; consequently, development began on the Enzian E.1 model and its propulsion system in September 1943. By May 1944 sixty airframes had been completed but lacked engines; instead they were fitted with RATO boosters for initial flight testing.[12]
Flight trials totaling 38 launches yielded generally positive outcomes,[13] though engine development lagged behind expectations. Subsequently Dr. Konrad—designer of the Rheintochter missile engine—was tasked with adapting his powerplant for use in Enzian rockets. This solution offered cost and performance advantages over the Walter design; following January 1945 plans shifted exclusively toward Konrad’s engine for production models designated E-4.
Due to unresolved issues with proximity fuzes, an infrared homing system called Madrid was proposed to enable terminal guidance directly onto targets.[14] Nevertheless, this system never progressed beyond experimental mockups and did not achieve operational status.[15]
On 17 January 1945 the Luftwaffe officially terminated all ongoing development projects to focus resources solely on two aircraft programs: the Messerschmitt Me 262 and Heinkel He 162. Despite this directive, some favored projects continued unofficially within Nazi and Luftwaffe circles. The Enzian program was ultimately canceled due to its perceived developmental delays compared with competitors such as Henschel’s Schmetterling missile. Although Messerschmitt engineers attempted limited continuation hoping for renewed funding, by March it became evident that cancellation orders would remain firm across all such efforts.
Survivors
Only a pair of Enzian missiles are confirmed to have endured beyond the conflict. One example is exhibited at the Royal Air Force Museum Cosford, while the other resides in storage within the Australian War Memorial's Treloar Resource Centre, having previously been showcased for several years at the Royal Australian Air Force Museum.
Cultural references
The name "Enzian" is used for a secondary character in Thomas Pynchon's novel Gravity's Rainbow, serving as a foil to the protagonist Slothrop, who is linked with the V-2 rocket.
See also
References
- ↑ Lua error in Module:Citation/CS1/Configuration at line 2123: attempt to index field '?' (a nil value).
- ↑ Christopher, John. The Race for Hitler's X-Planes (The Mill, Gloucestershire: History Press, 2013), p.144.
- ↑ Christopher, p.144.
- ↑ Christopher, p.144.
- ↑ Christopher, pp.144-5.
- ↑ Christopher, p.144.
- ↑ Christopher, p.144.
- ↑ Christopher, p.144.
- ↑ Christopher, p.144.
- ↑ Christopher, p.145.
- ↑ citation needed
- ↑ Clarify: precise RATO units unspecified
- ↑ Christopher, p.145.
- ↑ Christopher, p.145.
- ↑ Christopher, p.145.