Formula: {Tank_XCopter is a Liquid Hydrogen (LH2) Tank}

A composite structure LH2 tank fuels the engine of the XCopter.

UAV industry:
~ composite structures are being used as substitutes for metals
~ high strength-to-weight and/or stiffness-to-weight ratios are required for UAVs
~ weight is of major concern
~ reusable composite cryotanks have been verified in structural tests
~ they scale up in size with new manufacturing materials and processes
~ composite cryotanks have been tested to offer a 10 to 25 percent reduction in weight over current aluminum tanks
~ they allow larger payloads to UAVs and help to reduce cost of manufacturing

Car industry:

BMW 745h hydrogen-powered internal combustion sedan
~ injects liquid hydrogen and oxygen into engine cylinders
~ boasts a 184 horsepower, and reaches top speeds of 133mph
~ keeps LH2 at –487 degrees Fahrenheit in a highly insulated tank
~ H2 tank has 70 layers of aluminum and fiberglass sheets
~ car has the range of 190 miles on hydrogen alone with a 140 l cryotank

catch ~Tank_Xi ~Volume_Tank_XCopter ~XCopter!