There are unusual plane, after which there’s the Sud-Est Grognard.
At first, the French prototype didn’t appear like a modern jet-age assault aircraft. As an alternative, it appeared like the results of a conflict between aerodynamic concepts and sensible wants. The cockpit was set far ahead within the nostril, and the fuselage rose right into a noticeable hump behind the pilot. A single consumption on prime fed two turbojets stacked one above the opposite contained in the physique. The aircraft seemed awkward, virtually cartoonish, nevertheless it had a transparent objective: to provide postwar France a quick, jet-powered plane for low-altitude assaults.
The identify Grognard suited the aircraft completely. “Grognard” means “grumbler” and was used for troopers in Napoleon’s Previous Guard. It was a becoming identify for such an uncommon airplane. Formally, it was known as the Sud-Est SE.2410 Grognard, developed by the French firm Sud-Est/SNCASE after World Warfare II. The primary prototype, F-ZWRJ, first flew on 30 April 1950. Solely two prototypes had been ever constructed.
France Was Rebuilding Extra Than an Airplane
The Grognard got here from a really particular second in French aviation historical past. After World Warfare II, France was making an attempt to rebuild an aviation business that had been badly disrupted by occupation, destroyed factories, and scattered design groups. In jet propulsion, France additionally lagged behind international locations equivalent to america and the UK, which had moved rapidly into the jet age throughout and instantly after the conflict.
This background is necessary as a result of the Grognard wasn’t simply uncommon for the sake of it. It was a part of France’s push to rebuild its aerospace business and create its personal jet-powered army planes. The Rolls-Royce Nene turbojet performed a giant position on this effort. Hispano-Suiza made the Nene in France underneath license, and lots of early French jets used it whereas the nation developed its personal engines.
In 1946, the French Air Drive requested for a brand new ground-attack plane. Sud-Est answered the decision with the SE.2410, a small, rounded, single-seat aircraft powered by two Nene turbojets. The French clearly didn’t care what it seemed like, however by way of pace, firepower, and the flexibility to assault at low altitude, it was truly a reasonably futuristic machine at a time when jet fight planes had been nonetheless a brand new thought.
The Hunchback Had a Function
The Grognard seemed the best way it did for a cause. Early designs had been formed by wind tunnel assessments with scale fashions at ONERA’s Chalais-Meudon facility. The tip end result was a compact fuselage, sharply swept wings, and the distinctive prime consumption that fed two engines stacked inside.
The consumption on prime was what made the aircraft look so uncommon. Air entered the fuselage from the highest, simply behind the cockpit, and fed the 2 engines, stacked one above the opposite. This gave the Grognard its “hunchback” look and its memorable nickname.
The cockpit was additionally set far ahead within the nostril, which made sense for a low-flying assault aircraft. Pilots want good visibility when flying low and aiming at targets. The deliberate weapons matched this mission: the Grognard was supposed to hold two 30 mm DEFA cannons, bombs, and rockets, with some rocket concepts saved in a retractable bay underneath the fuselage.
Seems apart, the Grognard had authentic efficiency to again it up. The SE.2410 reportedly reached about 645 mph, climbed to roughly 38,000 toes, and had a spread of about 530 miles. It was unconventional, actually, nevertheless it was not underpowered.
The Grognard II Tried to Civilize the Beast
Sud-Est saved going after the primary prototype. In 1951, they constructed a second model known as the SE.2415 Grognard II. This one was longer, had two seats, a raised cockpit with a bubble cover, and wings swept again at 32 levels as an alternative of the unique 47. The second prototype, F-ZWRK, first flew on 14 February 1951.
The Grognard II seemed a bit extra polished, nevertheless it nonetheless had the identical household traits. It was nonetheless humped, compact, and unconventional…a transparent instance of early jet-age experimentation.
This system additionally reached an necessary milestone. Throughout weapons assessments, the Grognard reportedly turned the primary French aircraft to fireside an air-to-air missile, the Matra T-10. This offers it a particular place in French aviation historical past. Despite the fact that it’s largely remembered for its odd appears to be like, the Grognard helped pave the best way for the missile-armed jets that might come later.
The Downside Was Not Simply the Airplane
Like many prototypes from that point, the Grognard had its share of technical points. Check flights led to modifications to the tail and ailerons, and the SE.2415 skilled tailplane flutter. The second prototype was badly broken in a stomach touchdown after a false hearth warning, however the airframe was saved and later used as a goal for firing assessments.
However the greater downside for the Grognard was that issues modified too quick round it.
Whereas the Grognard was being examined, the French Air Drive revised its fighter and bomber necessities a lot that the assault plane class was virtually dropped. This left the Grognard in a tricky spot. It was constructed for low-level assaults, and its unpressurized physique made it exhausting to make use of for different roles.
Sud-Est did contemplate future variations. The SE.2418 was deliberate as a manufacturing assault mannequin with Rolls-Royce Tay engines, and the SE.2421 was studied as a two-seat all-weather fighter with radar. The SE.2418 would have used the unique Grognard I’s wing with the longer physique and enhancements from the Grognard II. At one level, Sud-Est was even on the point of produce the SE.2418 in bigger numbers.
So, the Grognard’s story feels much less like a lifeless finish and extra like a prototype overtaken by new concepts, competitors, and altering instances.
Overwhelmed by a Higher Future
The Grognard program led to 1952. Ultimately, French officers selected the Sud-Ouest Vautour II as an alternative. The Vautour was greater, extra versatile, and could possibly be used as a fighter-bomber, interceptor, or assault aircraft. In comparison with the specialised and strange Grognard, the Vautour was a extra apparent alternative for the long run.
The unique SE.2410 was taken out of service and reportedly scrapped by 1954. The Grognard II, which was broken and reused, didn’t do a lot better. No manufacturing fashions had been constructed, no squadrons ever flew it in common service, and it by no means had the possibility to develop into well-known.
Nonetheless, the Grognard is difficult to neglect.
Unusual, Formidable, and Very A lot of Its Time
It’s straightforward to make enjoyable of the Sud-Est Grognard. The nickname “Hunchback” virtually encourages it. However this aircraft deserves greater than only a fast look or a joke about its look.
The Grognard confirmed France’s effort to catch up within the jet age. It examined out swept wings, compact twin engines, heavy weapons, missile trials, and low-level jet flying when all these concepts had been nonetheless new and unproven. The aircraft might have seemed awkward, however the concepts behind it had been bold.
Some plane develop into well-known as a result of they set the course for the long run. Others are necessary as a result of they present the experiments engineers tried earlier than the long run was clear. The Grognard is unquestionably in that second group.
It was a grumbling, hunchbacked French jet made for a mission that vanished virtually as quickly because it appeared. It by no means went into manufacturing, by no means entered service, and by no means turned the assault aircraft France had hoped for.
However not less than it’s enjoyable to have a look at.
