Hybrid composites for oxygen propulsion systems

Apparatus for holding liquid oxygen comprising:

• a structural tank body having means for containing liquid oxygen, the tank body having an interior for containing a cryogenic material that has a temperature as low as around minus 300 degrees F., the tank body having a tank wall with an inner surface for contacting liquid oxygen, the tank wall and inner surface each having a hybrid composite construction, wherein the tank has a primary component wall system and an interior component wall system, the primary component wall system being made of a first resin reinforced with a first fiber, and the interior component wall system including a more liquid oxygen compatible fiber or a more liquid oxygen compatible resin;
• and
• wherein the fiber-reinforced resin portion directly contacts liquid oxygen when liquid oxygen is put into the composite tank apparatus.

Apparatus for transporting liquid oxygen comprising:

• a composite feedline having means for transporting liquid oxygen, the feedline having an interior for transporting a cryogenic material that has a temperature as low as around minus 300 degrees F., the feedline having a feedline wall with an inner surface for contacting liquid oxygen, the feedline wall and inner surface having a hybrid composite construction that includes a fiber-reinforced resin portion, wherein the feedline has a primary component wall system and an interior component wall system, the primary component wall system being made of a first resin reinforced with a first fiber, and the interior component wall system including a more liquid oxygen compatible fiber or a more liquid oxygen compatible resin;
• and
• wherein the inner surface directly contacts liquid oxygen when liquid oxygen is put into the feedline.

A liquid oxygen tank apparatus comprising:

• a) a linerless tank body having a wall with inner and outer surfaces, the inner surface defining a hollow interior for containing liquid oxygen;
• b) the tank wall comprising a hybrid composite construction that includes first and second wall portion, the first wall portion including a first resin with a first fiber and the second wall portion including a liquid oxygen compatible resin.

A method of using a composite tank to hold liquid oxygen, comprising:

• a) providing a composite tank apparatus, the composite tank apparatus comprising a linerless structural tank body having means for containing liquid oxygen, the tank body having an interior for containing a cryogenic material that has a temperature as low as around minus 300 degrees F., the tank body having a tank wall with an inner surface for contacting liquid oxygen, the tank wall having a hybrid composite construction that includes a fiber-reinforced resin portion;
• and putting liquid oxygen in the composite tank apparatus.

Apparatus for transporting liquid oxygen comprising:

• a linerless composite feedline having means for transporting liquid oxygen, the feedline having an interior for transporting a cryogenic material that has a temperature as low as around minus 300 degrees F., the feedline having a feedline wall with an inner surface for contacting liquid oxygen, the feedline wall having a hybrid composite construction that includes a fiber-reinforced resin portion, wherein the feedline has a outer primary component wall system and an interior component wall system, the primary component wall system being made of a first resin reinforced with a first fiber, and the interior component wall system including more liquid oxygen compatible fiber or a more liquid oxygen compatible resin.

Apparatus for holding liquid oxygen comprising:

• a linerless structural tank body having means for containing the tank body having an interior for containing a cryogenic material that has a temperature as low as around minus 300 degrees F., the tank body having a tank wall with an inner surface for contacting liquid oxygen, the tank wall having a hybrid composite construction that includes a fiber-reinforced resin portion, wherein the tank has an outer, primary component wall system and an interior component wall system, the primary component wall system being made of a first resin reinforced with a first fiber, and the interior component wall system including a more liquid oxygen compatible fiber or a more liquid oxygen compatible resin.