Comments by "g simpson" (@GSimpsonOAM) on "See Thru Liquid Piston Rotary Engine - In Slow Motion" video.

  1.  @MrVaticanRag  Energy density of Hydrogen is very poor compared to fossil fuels (about 7 times less energy). It is the volume (litres) you need to consider in a vehicle not weight (kg). That is, the physical size of the tank. So range will be only 20% on the same tank as a fossil fuel vehicle or tank will need to be 5 times as large for same range.
    1