Schempp-Hirth / Göppingen

Sportflugzeugbau Göppingen (Sport Aircraft Göppingen)
Sportflugzeugbau Schempp-Hirth
Schempp-Hirth Flugzeugbau Gmbh

Martin Schempp and Wolf Hirth first met in 1928 and beginning in 1935, the team developed the Minimoa, the first high performance glider to sell more than 100 models. The production of Schempp-Hirth gliders began in the municipal building yard in Göppingen, near Stuttgart, where Martin Schempp founded the Sportflugzeugbau Göppingen (Sport Aircraft Göppingen) company in 1935.

In 1938 the company moved to Kirchheim/Teck and employed more than 300 people during the war time.

The first serial gliders were the aerobatic single seat trainer GÖ-1 ‘Wolf’ from Wolf Hirth and the renown GÖ-3 ‘Minimoa’ as well as the two seat GÖ-4 from Wolfgang Hütter. Occasionally there are single examples which are preserved and maintained as oldtimers which can still be found at airshows.

During the war, the production was forcefully expanded to build parts for, amongst other things, the ME-109, the “Giant” and for the Bachem “Natter”. Alongside the GÖ-4 there were also complete aircraft which were built, like the GÖ-8 and the 13,6m-“Habicht”.

The period after the war till 1955 was bridged with the production of plywood suitcases, leg prosthesis, furniture, weaving looms etc, yet also with fighter jet dummies (F-86) and sound studios for television stations.

The connection to the aviation industry was implemented early on with the production of the Matteson M-1 glider, the production of the powered aircraft GS-6a “Milan” and with works on engine pod and tail section of the “Trumpf” airship D-LEDA.

Licenced production such as “Emeraude” and “Smaragd”, subcontracting for “Kl-107” “, “Do-27”, “Do-28” and subsequently the production of the Standard Austria glider in several versions, ensured the employment of the about 50 employees till 1965.

In 1960s company renamed and built the Milan 656 light tourer, also French Piel Emeraude under licence. During early 1960s production of powered aircraft ceased, licence rights for Emeraude being transferred to Binder Aviatik KG.

Regaining a foothold in the world market was achieved with an own design, the SHK, by Rolf Kunz which was flown into third place in its first attempt at the 1965 World Championships in South Cerny/England.

After that the technology revolution from wood to fiberglass was completed in quick steps – at Schempp-Hirth under the directorship of Klaus Holighaus, who, with the maiden flight of his Cirrus in January 1967, was able to celebrate a successful debut.

Two years later, again in January, he already flew his first “Super Orchid”, the Nimbus-1. With this glider George Moffat won the 1970 World Championships in Marfa/Texas, USA.

With more than 700 produced examples, (of which 200 were produced by Grob), the Standard Cirrus was Schempp-Hirth’s second most successful aircraft in produced units. Further successes followed in 1972 and 1974 when Göran Ax in Yugoslavia and George Moffat in Australia became World Champions in the Open Class flying the Nimbus-2 (the production version of the Nimbus-1).

1974 also marked the maiden flight of the Janus, being the worlds first two seat glider in fiberglass construction. Constantly refined (e.g. 20 m CFK wings) it was only retired from production in 1996 after over 20 years. The last variants were the janus-Ce and janus-CT.

Also in 1974, there was the maiden flight of the single seat motorglider Nimbus-2M. Not only were the first experiences with retractable engines achieved, but also numerous world records were set, from the limited series production.

For the FAI introduced “15 m Racing Class”, Schempp-Hirth delivered the Mini-Nimbus, which came on to the market in many versions and was superseded in 1980 by the Ventus.

A new material had found its way, however, into the Kirchheimer production halls: the carbon fiber. What was included into the Nimbus-2C in a rather inconspicuous manner, proved itself to be the start of, at that time not appreciative of how large, an effective future in the production of high performance gliders. The thin wing profiles of the succeeding developments would not have been possible without the higher strength and stiffness of the carbon fiber.

The lengthening of the lifespan for fiberglass constructed gliders from 3000 to 6000 hours was for example, proven with a Nimbus-2 inner wing.

Serial introduction of carbon fiber was first included on the Nimbus-2C, Mini-Nimbus-C, Janus-C and Janus-CM. the optimal qualities of this new material were only utilized fully later on in the Ventus and Nimbus-3, in the production of the long and thin wings of these models.

Just a few months after its maiden flight, the Nimbus-3 won the 1981 World Championships in Paderborn.

Then the Ventus and Nimbus-3 won the 1983 World Championships in Hobbs/USA and subsequently the Nimbus-3 was also at the front in Rieti in 1985. Together with this, a string of national championships titles for both models and a number of world records for the Nimbus-3 were achieved.

Whilst the production of the single seat Nimbus-3 had to be discontinued after a fire in one of the production halls, this enabled the production of the Racing Class glider Ventus to be increased, allowing the increase in demand for its motorized variant Ventus-bT to be satisfied.

Constant refinement was also the key for the success of the Racing Class glider Ventus which debuted in spring 1986 as the model Ventus-c (on request with wing tip extensions for 17,6 m wingspan). Production of this model was ceased in 1994 after over 600 examples were produced (including self launchers and turbos).

January 1998 saw the delivery of the 4000th built Schempp-Hirth aircraft since the start of the company (including aircraft built under licence).

Today thousands of their gliders are flying around the world. Schempp-Hirth sailplanes include the Ventus A, an advanced 15-meter-class plane with carbon-fiber technology, thin wings, and a low-profile fuselage. The Ventus B is a 15-meter-class craft with a larger cockpit for tall pilots. The Nimbus 2C (open class) has a 20.3- meter wingspan with either carbon or carbon/fiberglass construction. The Janus B has an 18.2-meter wingspan for high-performance tandem two-place flying. The Janus C has a 20-meter span with carbon wings, seating for two, and competition-type performance. The Janus CM, with a 20-meter span, is a two-place motorglider with carbon wings and fully retractable engine. Schempp-Hirth’s newest sailplanes include the Discus, Duo Discus, Ventus and Nimbus, available in a variety of variations, including pure gliders and powered sailplanes.

January 1998 saw the delivery of the 4000th built Schempp-Hirth aircraft since the start of the company (including aircraft built under licence).

2014: Schempp-Hirth Flugzeugbau GmbH
Type Certificate: EASA.A.532

Schapel SA-882 Flying Wing

The SA-882 is a flying wing which was designed and built to research the overall aerodynamics, control and flying characteristics of a tailless airplane configuration.

The Schapel Wing is powered by a turbo-charged Mazda, 2 chamber, rotary engine. The 3-bladed propeller is ground adjustable and is driven by a 40-inch long drive shaft. Propeller 2:1 speed reduction is accomplished by a helical gear speed reducer. The engine gave them some problems during the dyno testing phase, but a successful combination was finally developed.

The aircraft was built in female molds using an epoxy system, vaccumed, and cured at 240 degrees F. in an oven. The upper and lower surfaces are a foam sandwich with a three spar system out to the landing gear position and then two spars out to the tip. The wing has five ribs per side and uses a non-laminar flow airfoil of his own design with a very low pitching moment. The wing has a lot of twist between the root and tip, with about 9 degrees negative by the time you reach the tip. This was designed to achieve a zero pitching moment, which has since been confirmed through the flight testing. Max CL came out to about .85, and was driven by all the actuation mechanisms had to be enclosed.

The actual construction involved using unidirectional material, laid up at different angles as required by the results of a computer analysis. They built a male plug, a set of one piece female molds for everything and, then the PVC sandwiched skins constructed. This type of construction gave it about a 1300 lb. empty weight, with a fuel capacity of 57 gallons right at the CG. The spars were made up separately, then added to the laminated lower skins along with the ribs and then bonded all together. The upper skins, in their molds, were then bolted on-top of the low portion so a spar cap could be cast to measure the thickness between the spar and upper skin. Once the skin was constructed, the whole thing was bolted together and put in the oven for curing.

It should have had a steerable nose gear, which it did not. Low speed controllability during the initial phases of takeoff required using a lot of brakes, since the drag rudders were ineffective. This was due to them being at the MAC rather than the wingtips so the pitching moments wouldn’t be changed during flight.

A single-place monoplane, powered by a 180hp turbo Mazda rotary pusher, one was built to full scale circa 1985 and registered N882SA. The SA-882 was flight-tested in 1984 and is now preserved by the Planes of Fame Museum, Chino, Nevada.

Several things the builder said he would change if he did it again were: put the drag rudders out at the wingtips; instead of having separate elevator and ailerons he would combine the two, and; he felt it would be much simpler to put a jet engine (about 400 lbs thrust) in it versus the rotary.

Engine: Mazda rotary, 180 hp
Wing Span: 34 feet
Wing Area: 160 sq. ft.
Aspect Ratio: 7.23
Gross Weight: 1960 lb
Empty Weight: 1372 lb
Useful Load: 612 lb
Maximum Fuel: 57 USgal
Seats: 1

Schapel Aircraft Company

1973:
(Rodney E) Schapel Aircraft Co
Reno NV.
USA

Founded 1973. Produced S-525 Super Swat twin-boom and turboprop-powered agricultural aircraft 1980, followed by design of S-325 Mini-Swat conventionally configured agricultural aircraft, SA-882 Flying Wing tailless research aircraft 1985, and design for S-185 as lightweight single-seat attack aircraft.

The (Rodney E) Schapel Aircraft Co had a number of project but it is unknown if any flew.

Schafer Aircraft Modifications Inc

USA
Schafer Aircraft Modifications Inc was founded 1977, and from 1979 developed modifications for other aircraft. Included were installing turboprop engines to Piper Navajo as Schafer Comanchero, turboprop engines to Piper Chieftain as Comanchero 500, installing higher rated turboprops to Piper Cheyenne II as Comanchero 750, and developing turboprop conversion and fuselage stretch for DC-3 as DC-3-65TP Cargomaster.

Schädler Brothers Human-powered

The three Schädler brothers in Landstuhl in Pfaltz had already in 1912 had begun the construction of a human powered aircraft. With the assistance of a teacher living locally, they began work began in their father’s carpentry workshop. The resulting machine was a light monoplane of 12.50m span and 5.50m length. The fuselage had a big nose, and a large propeller of approx. 1.8m, made of alder wood, driven by pedals connected to a gearbox. In the autumn of 1912, the first rolling tests, in order to test the traction of the propeller, were carried out. Since these proved satisfactory, they moved on to actual flight testing. The youngest of three brothers, Eugen Schädler, succeeded in making a flight at a height of approximately 1 – 1.50m above the ground, and flying for a distance of 70m. On landing, the right wheel of the undercarriage broke. According to reports by Anton Schädler, further tests were to be carried out, but the advent of the war meant those plans had to be cancelled. The first pilot of a human powered aircraft died as a soldier in France on 28.6.1916.