VW diesel 1.9L turbo 200 HP gets 60+ miles per gallon, 50L to fill and gives over 1000km
water powered car
stanley meyers came up with the concept in 1998 which was 20 years ago now. not too much progress has been made designing a plugin hybrid one that can sustain itself for travels.
according to wiki
“electrolysis (PEM or alkaline electrolysis) which have an effective electrical efficiency of 70-80%, producing 1 kg of hydrogen (which has a specific energy of 143 MJ/kg or about 40 kWh/kg) requires 50–55 kWh of electricity.”
fuel cells are 40-60% efficient with potential to 80-90% lasting around 20 years ? making electric drive the preferred way to travel.
explosion potential from these can be overted with proper tanks/hoses/sensors even in crash instances.
fan powered parachutes
https://www.ebay.ca/i/201829805070 neat 80 cc motor kit for a standard bicycle $91 usd
https://www.ebay.com/itm/2-PACK-40V-18-4AH-736WH-LITHIUM-LIFEPO4-96-A123-26650-POWERWALL-DIY-EV-BATTERY/173304996422 ups does not ship these to canada so you may have to talk with the seller if outside of USA.