Bushfires are being considered as one of the most dangerous natural disasters and keeping the terrible Australian Black Saturday bushfires during the last February in mind a concept survival option has been developed named Bushbunker. This concept is an architecturally designed safety bunker that is able to protect you when required. This concept bunker is comprehensively designed to endure people during the severe environmental situations that a massive bushfire may produce. This bunker contains a sitting arrangement for 3 to 4 person and adequate water preservation and food storage to keep the insiders alive for few days till the fire becomes under control.
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The Pi electric bicycle uses a semi-automatic 8-speed transmission to downshift into a lower gear for climbing hills, then up shift for rapid acceleration to a maximum of 20 mph on flats and allows you to pedal normally because the motor automatically disengages when not in use. Powered by a 750-watt electric motor housed in the horizontal chain and motor assembly, the Pi electric bicycle is capable of three modes of operation: electric motor power, human power, or the human-electric hybrid power combination. The electric motor and rider utilize the same 8 speed semi-automatic transmission making rapid acceleration from a stop or lower gears available for steep inclines possible (but with slower acceleration.
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