This is the "Land Master" from the B Hollywood Movie "Damnation Alley" AKA "Survival Run".
This Movie is inspired by a very good book of the same name by Roger Zelazny.
Only Hollywood changed a rough Hells Angel on a Harley into a kid on a 125 cc.
The only good thing in the movie was the Landmaster and the sky-effects.
The major/minor wheel assemblies are custom made, via casting and machining.
The three-star-wheel system was invented by Lockheed.
This fully functioning amphibious creation has cost about $300.000.
The chassis forms two FLOTATION TANKS! See photo! 3 and 4
The engine is a Ford 390 industrial gasoline (benzine) motor, transmission is an Allison automatic, axles are probably Rockwell. Hydraulic pump is probably Eaton.
It does 60 km/h on road.
The rotating star wheel system also allows the vehicle to climb over fallen trees e.t.c.
The Landmaster is after 2005 in private ownership and has been restored.