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Grade monoplane

Страна: Германия

Год: 1909

Grade - triplane - 1908 - Германия<– –>Halberstadt - Taube - 1913 - Германия

Jane's All The World Aircraft 1913

GRADE. Hans Grade Fliegerwerke, Bork, Post Bruck (Mark). Founded 1910 by H. Grade, who was the first man in Germany to fly with a German machine. During 1911 Grades had a considerable vogue, but since then have not been prominent.

[Illustration: Photograph, from above rear, caption: 1912 racer.]

Model and date. Racer, 1911. Racer, 1912. Racer, 1912.
   C. D. E.

Length..............feet(m.) 33 (10) 21 (6.50) 26? (8)
Span................feet(m.) 39? (12) 34? (10.50) 41 (12.50)
Area .........sq. feet(m^[2].) 480 (45) 240 (22) 360 (33)
Weight, machine...
   ...............lbs.(kgs.) 375 (170) 408 (185) 595 (270)
Weight, useful...
   ...............lbs.(kgs.) ... ... ...
Motor...................h.p. various ... ...
Speed............m.p.h.(km.) 56 (90) 71 (115) 71 (115)
Number built during 1912.... ? 1 or 2 ?

J.Herris German Aircraft of Minor Manufacturers in WW1. Vol I (A Centennial Perspective on Great War Airplanes 49)


   Hans Grade was born on 17 May 1879 and died on 22 October 1946. He graduated from an engineering high school in Berlin and while studying established a small workshop where he built racing motorcycles. Becoming interested in aviation he built a light triplane in 1907 that was powered by an air-cooled V-6 engine of his own design that delivered 36 horsepower. Tested on the military exercise field at Magdeburg, Grade adjusted his machine until he flew a distance of 60 metres, the officially designated first powered flight in Germany.
   Grade's next aircraft was a monoplane. It performed well and Grade kept it in his school and only altered it to meet his customer's demands. He also had a side by side trainer version. The Grade monoplane was a high-wing, single-seater with tricycle wheel undercarriage. The fuselage was comprised of a frame of oval tube with bamboo longerons supporting the tailplane. The pilot's position was a linen-covered tube framework that was suspended on wires and springs.
   The wings were constructed around three bamboo spars, one of which formed the leading edge. The angle of incidence changed along the wingspan and was negative at the wingtips. The wings were fabric covered on both sides but only for approximately 75% of the chord of the bottom wing. Control was by warping the wings. Power was provided by a Grade two-stroke V-4 driving a two-bladed propeller. By 1911 the Grade monoplane was obsolescent.

Журнал Flight

Flight, October 2, 1909

Herr Grade Has a Fall.

   WHILE making an attempt to win the Lanz Prize of L2,000 at the Mars flying ground, near Berlin, Herr Grade had a nasty accident with his monoplane, but fortunately without injury to himself. The regulations stipulated that a flight of 2 1/2 kiloms. should be made in a figure of eight. Herr Grade started off splendidly, but in the middle of the trip the propeller broke and the machine fell about 30 metres, but the force of the fall was broken by some low pine trees. The machine was badly damaged, but it was hoped that it would be repaired in a few days.

Flight, November 6, 1909

Herr Grade Wins a Prize.

   AFTER long and patient experimenting, Herr Grade has at last met with success, and last Saturday succeeded in winning the Lanz Prize of L2,000, easily fulfilling the conditions required. These were that the aviator must be of German nationality and use a German built machine, and describe a figure " 8" round two posts placed a kilometre apart. Herr Grade's machine, as will be seen from our photograph, appears like a combination of the latest Bleriot and Antoinette machines, the aviator sitting below the main planes. On the following day Herr Grade had his monoplane out again at Johannistal and made four flights, the first three of 3 mins. 45 secs, 14 mins. 30 secs., and 4 mins. 55 secs, respectively, while the last was of one turn round the course. From this it would seem that at last Herr Grade had overcome his difficulties and evolved a successful machine.

Flight, December 11, 1909


   ALTHOUGH in Germany attention has been almost entirely directed to the development of dirigibles, yet the past year has produced one machine with which some very good results have been obtained. It is the invention of Herr Grade, an engineer of Berlin, who has been patiently working away at the problem for some considerable time. His first machine was a triplane, but as a result of his experiments, Herr Grade gradually modified his designs until the successful flyer was evolved in the form of a monoplane, which in silhouette combines several features of the Bleriot and Antoinette machines. Our readers will remember that Herr Grade's first success was obtained during the last few days of last year, when he was able to rise in his machine to an altitude of one metre and cover distances varying between 100 and 400 metres. After that followed a long period of patient experimenting with but little visible result, and it was not until the early part of last September that Herr Grade came prominently into public notice again. He transferred his monoplane to the Mars flying ground, to the south-west of Berlin, and made three short flights, each of a mile and a half in length. Then success followed rapidly, and Herr Grade has gradually improved his record until on November 15th he remained aloft for 54 minutes, during which he occasionally rose as high as 100 metres. One of his most notable performances was the winning of the Lanz prize of L2,000 for the first German-built aeroplane to describe a figure "8" round two posts placed a kilometer apart. This Herr Grade successfully accomplished on October 30th. Although he has had one or two tumbles Herr Grade has only experienced one serious accident, and that was due to the propeller breaking when the machine was flying at a height of 30 metres.
   With regard to the machine itself, of which we are enabled to give scale drawings this week, it will be noticed that the planes are mounted on a framework built up of steel tubing and carried on three wheels, which are fitted with pneumatic tyres. This framework is remarkably simple, consisting as it does of the triangular front frame and the tube which forms the backbone of the apparatus. This latter member, as can be seen in the plan, is attached to the front frame by a forked end, and this fork carries the main-planes, and is also continued forward to serve as engine bearers. The main planes are strengthened by wire stays, of which those on the upper side meet at the apex of the vertical front-frame, while those on the under-side are attached to the hub-caps, on the Santos-Dumont method. Our photograph clearly shows the way in which the pilot sits below the main planes in a hammock seat suspended by springs from the framework. He controls the machine by warping the wings, by means of the hand lever, and by the tail, which is similar to that adopted by M. Santos Dumont on his little "Demoiselle." The flyer has an area of 208 square feet, and is fitted with a 4-cyl. air-cooled "V" motor, which is also the production of Herr Grade. This is of 24-h.p. and weighs 35 kilogs. The propeller is a two-bladed metal one, directly attached to the crank-shaft. A keel is fitted above the main plane and is continued behind the pilot's seat. That part of it on top of the machine is of inverted "V" section, as it follows the shape of the top portion of the front frame. Incidentally, therefore, it affords a covering for the pilot.

Flight, December 28, 1912.

By G. B.

   The photograph of one of the latest military type Grade monoplanes shows that the design, in its general lines, has been very little altered from the original machine, what changes there have been being mainly in the nature of detail improvements.

J.Herris - German Aircraft of Minor Manufacturers in WW1. Volume I /Centennial Perspective/ (49)
Colorized photo of the Grade monoplane. Primitive as it was, at least it had 3-axis flight controls.
Журнал - Flight за 1909 г.
Herr Grade, the German aviator, who has been flying on his monoplane at the Mars Aerodrome, near Bork, for the Lanz prize.
Журнал - Flight за 1909 г.
The First All-German Flyer. - Herr Grade is seen in the above view on his monoplane during the flight on Saturday last at Bork, which secured for him the L2,000 prize offered by Herr Lanz for the first German to describe a figure "8" round two posts placed a kilometre apart.
Журнал - Flight за 1912 г.
A series of German aeroplanes at Johannisthal from photographs kindly sent to us by the Hon. Lady Shelley. - Grade monoplane.
J.Herris - German Aircraft of Minor Manufacturers in WW1. Volume I /Centennial Perspective/ (49)
This Grade monoplane was commandeered on the outbreak of the war and used as a trainer. (Peter M. Grosz collection, STDB)
J.Herris - German Aircraft of Minor Manufacturers in WW1. Volume I /Centennial Perspective/ (49)
Журнал - Flight за 1914 г.
Krumsick on a Grade monoplane at the Munster aerodrome.
Журнал - Flight за 1912 г.
One of the newest Grade, military-type, monoplanes.
Журнал - Flight за 1914 г.
TWO OF THE LATEST GRADE MONOPLANES. - Top: The new 100 h.p. Grade monoplane, which is fitted with a 4-cyl. air-cooled Grade engine. In spite of the small number of cylinders this engine is said to be remarkably free from vibration. The oil consumption is 4/5 gal. per hour, and petrol consumption 7.7 gals, per hour. The speed of the machine is 75 m.p.h. Below: The 16-24 h.p. Grade monoplane, which weighs 265 lbs. only, and for which a speed variation of 50 per cent, is claimed.
Jane's All The World Aircraft 1913 /Jane's/
1912 racer.
Jane's All The World Aircraft 1913 /Jane's/
JAPANESE AEROPLANES. Army Flying School ground. Bleriot (since wrecked), Tokogawa, Wright, Grade.
Журнал - Flight за 1909 г.
THE GRADE MONOPLANE. - Front elevation.
Журнал - Flight за 1909 г.
THE GRADE MONOPLANE. - Side Elevation and Plan to scale.
Jane's All The World Aircraft 1913 /Jane's/