Hankuk Carbon Co., Ltd.

Lg Electronics Inc.

Lockheed Martin Corporation

Israel Aerospace Industries Ltd.

Korea Aviation Technologies Kat Co., Ltd.

Cho, Jinsoo

Jinsoo Cho

Hangyu Cho

Kiseon Ryu

Jinyoung Chun

Wookbong Lee

Edward Henry Allen

Hanki Lee

Minjun Kim

Kyusung Park

Sunho Beck

Senghyun Yun

Changjun Meang

Changmo Moon

Boseong Kim

Sunghong Won

Dain Lee

Tae-Chul Jeong

Sooyoung Cho

Adam C Salamon

Geunho Lee

Jeong-Gyu Bak

Juhyung Ha

A vertical take-off and landing aircraft using a hybrid electric propulsion system includes an engine, a generator that produces electric power using power supplied by the engine, and a battery that stores the produced electric power. A motor receives the electric power stored in the battery and electric power produced by the generator but not stored in the battery and provides the power to a thrust generating apparatus. A controller selects either silence mode or normal mode, and determines the amount of electric power stored in the battery and the amount of electric power not stored in the battery from the electric power supplied to the motor. In the silence mode, the controller supplies only the electric power stored in the battery and controls a duration by adjusting output power of motor. In the normal mode, the controller supplies electric power not stored in the battery.

Vertical take-off and landing aircraft using hybrid-electric propulsion system

According to an embodiment of the present invention, a data transmission method for a station (STA) device in a wireless LAN (WLAN) system includes the steps of: generating a physical protocol data unit (PPDU) that includes a physical preamble and a data field; and transmitting the PPDU. Therein: the whole transmission band of the PPDU is made up of a plurality of resource units in a frequency region; each of the plurality of resource units is configured from a preset number of tones; resource units, from among the plurality of resource units, that have the same logical index are allocated to the same STA; and the resource units that have the same logical index may be discontinuously located in the frequency region.

Method for transmitting data in WLAN system, and device for same

Vertical take-off and landing aircraft using hybrid electric propulsion system

Growing community of inventors

Seoul, South Korea

Jinsoo Cho