Jacobs 1910 Multiplane

The 1910 Jacobs Multiplane [also identified as the Jacobs-Emerson multiplane] was the creation of Henry William Jacobs of Atchison, Kansas. It had quadruplane wings and tail and two engines, each driving a propeller.

Jacobs used two improved air-cooled 35hp engines he invented, to replace the two original underpowered engines [Emersons?], with which the plane flew in 1910.

It was displayed on the New York Aero Exhibition 1912. Jacobs had formed with others the firm “Multiplane Limited” in Kansas to build the machine and eventually sell it to the market and a brochure of 16 pages was produced.

Irvine Aerocycloid

The photograph shows a quarter-size model of the Irvine Aerocycloid of 1908/1909 which was able to lift the weight of ninety pounds. The San Francisco based John C. Irvine (president of the Pacific Aero Club) had worked three years on the machine, which was driven by a 3 hp electrical engine, that could lift 30 pounds for each hp. Records do not show that the full-sized model was ever built, probably due to problems with financing of the project. The specialty of the machine was of course the two upright wheel construction, driven by cables, which carried four “propellers” which pivoted between the wheel and furnished the lifting power. With the propellers in the proper position the force would be upright, lifting the machine vertically. Pivoting the propellers at an angle would obtain a forward motion.

Huth Kreis-Doppeldecker

This biplane was designed by Dr. Fritz Huth and built at the Max Schüler Aeroplan-Fabrik (Berlin) in 1909. It had sickle-formed wings, the front pair with points to the rear and the rear pair with points forwards, so that almost ring-formed surfaces of 6 m diameter was formed. It’s reported that two were built, one by Huth’s Deutsche Flugwerft (Huth-Motor), another by Schüler (Aeolus-Motor).