Pulse Jet Bicycles
Cyclos and bicycles powered with makeshift pulse jet engines. Due to their simple design, low-material requirement and ability to run on almost anything that burns, including particulate fuels such as sawdust or coal powder, the bikes are becoming more and more common across Azure.
However, pulse jet engines are characterised not only by their simplicity and low-cost construction, but also by the deafening noise, producing a distinctive buzzing or droning noise as the engine fuel combusts from 45-60 times or more a second, giving them their buzz bike nickname.
With the low mineral wealth of Azure, pulse jets are easily fabricated from scrap metal and salvaged parts, and further development in efficiency of the engines continues in ernest.