Starter arrangement for a helicopter

US4875643A · kind A · utility

Assignee

• Dr. Ing. h.c. F. Porsche AG · DE

Inventors

• Staas Gietzen · Sternenfels, DE
• Hans Weiner
• Klaus Hain · Leonberg, DE
• August Hofbauer · Pforzheim, DE
• Juergen Hawener · Stuttgart, DE

Key dates

• Filing date: Sep 21, 1988
• Grant date: Oct 24, 1989
• Expiry date: Sep 21, 2008

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C27/14
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A helicopter equipped with a reciprocating piston internal combustion engine in which an override clutch is arranged in a drive connection between the internal combustion engine and a rotor drive, is equipped with separate first and second electric motor starter devices (screw-push starters). A starter operation takes place in two phases whereby in a first phase initially the rotor drive is brought to a rotor synchronous rotational speed syn by means of the first starter device and in a second phase the internal combustion engine is started by means of the second starter device. When the internal combustion engine exceeds the idling rotational speed nl, the override clutch establishes the power-flow connection between the internal combustion engine and the rotor drive. Both phases can be carried out manually as also by a partly automatic or fully automatic control system on the basis of key depression.