Ogilvie Triplane

The second machine of Bertram Ogilvie wa a larger triplane about 12 feet high at the upper mainplane. The success of this aircraft is reputed to have been no better than that of the first. But Bertram Ogilvie, and Arthur Pickard-Hawkins, his employer, who’s help and encouragement had been instrumental in construction of these first two machines, set about building a third, still with the intention of testing Ogilvies ‘briai child’ the aileron.

Prior to construction of his first aircraft, Ogilvie built a small wing of about 4 foot span, mounting it behind a motor vehicle, and had observed its reaction when, with the aid of cords, the ailerons were activated.

By all accounts, the third aircraft proved successful, and Lord Kitchener who witnessed flights at ‘Grafton’, the Pickard-Hawkins’ property at Maraenui near Napier, was so impressed that he undertook to arrange publicity for Ogilvie and his aircraft should he take it to England.

On arrival in the UK Ogilvie and Pickard-Hawkins assembled the aircraft at Aldershot. With top military personnel present in preparation for Oglvie’s display, difficulty was experienced in coaxing the engine into life and, in the ensuing confusion the throttle was left open. When the motor finally fired the aircraft careered across the airfield and was wrecked.

Arthur Pickard-Hawkins returned to New Zealand but Bertram Oglvie remained in the UK and became and aircraft designer with Handley Page Ltd.

Oelimichen No.6

The Etienne Oelimichen No.6 of 1935 was a helicopter with a 353 cu.ft balloon mounted above to assure stability. It also had a quad rotor and quad gear.

On 2 March 1935 Oelimichen flew the craft for 5 minutes in the large dirigible hanger at Orly, demonstrating its stability.

The French Musee de l’Air possesses five of Etienne Oelimichen’s experimental helicopters developed from 1920 through 1938. In 1965 only his sixth project of 1935 was on display.

Width: 16.73 ft
Length: 16.73 ft
Rotor diameter: 9.18 ft

Oelimichen No.3

Oemichen was dissatisfied with the modest heights to which No.2 was able to fly, and from the third machine onward he adopted a single main rotor layout, accompanied by two smaller anti-torque rotors. His last design, in 1938, reverted to the balloon-assisted principle of his first aircraft.

Oemichen’s third helicopter which appeared in 1924 had a single large rotor with two blades.

Oelimichen No.2

In 1922 Oemichen was able to dispense with the gasbag of the first machine and fly free. Etienne Oelimichen’s No. 2 machine was powered by a 120 hp Gnome rotary engine. It had four large rotors and eight stabilizing and steering propellers about an open lattice work frame and it flew for the first time on 11 November 1922.

Etienne Oelimichen’s first helicopter flew in 1922 for a distance of 60 m (197 ft). In 1923 he made the first hovering flight of more than five minutes.

The Oemichen No.2 was basically a steel-tube framework of cruciform layout, with 2-blade paddle-shaped rotors at the extremities of the four arms. The angle of these blades could be varied by warping. Five of the propellers, turning in a horizontal plane, served to stabilise the machine laterally; another propeller mounted at the nose was for steering the helicopter; and the remaining pair acted as pusher propellers for forward propulsion. The opposing pairs of rotors were of slightly different diameters. The Oemichen No.2 exhibited, for its time, a considerable degree of stability and controllability, and in all made more than a thousand test flights during the middle 1920s. By 1923 it was able to remain airborne for several minutes at a time, and on 14 April 1924 it established the first-ever FAI distance record for helicopters of 360m. Three days later it increased this to 525m. On 4 May 1924 this contraption made a closed¬ circuit flight of 1 km (0.62 mile) at Arlonans to set a distance record for helicopters, It was airborne for 14 min with the kilometer taking 7 minutes and 40 seconds, to win a 90,000 franc prize.

A 180hp Gnome engine was substituted later.

Despite the fact that it was able to demonstrate sufficient controllability and power in ground effect for this historic flight, it was not a practical flying machine. In recognition of the impracticality of the machine, Oemichen began pursuing a series of aircraft with a single-main rotor and two anti-torque rotors, but had little success.

Oemichen No.2
Engine: 1 x Gnome Rhone, 135kW
Rotor diameter: 2 x 7.60m + 2 x 6.40m
Empty weight: 800kg