Jacob Christian Hansen Ellehammer invented the first 3 cylinder radial internal combustion engine in 1904.
One thing that was invented in 1887 was the gramophone. The gramophone was invented by Emile Berliner. Other things she invented include the radial aircraft engine, helicopter and acoustical tiles.
Michelin
radial
The Jet engine was invented simultaneously by an Englishman and German, however neither knew of each others work and they both designed a completely different engine. English Sir Frank Whittle invented the radial flow engine, whereas the German Albert Fonó invented the axial flow engine. Both engines were successful, however the axial flow princable is used mostly today.
Patented in 1915 by Arthur Savage in California. Michelin started building radial tires in 1946.
1948, courtesy of Michelin.
The "normal" engine is also called a rotary engine. Both of these engines look very similar. Radial engines use a conventional crankshaft in a fixed engine block, unlike the rotary engine. +++ You've missed the fundamental point. A conventional engine has its cylinders in a straight line or lines. A radial engine's cylinders are arranged, as its name says, radially from the polygonal crankcase, like the spokes of a wheel.
Pratt & Whitney nine cylinder radial engine
The fact that both are aircraft engines is the only connection.
An opposed-piston engine is a reciprocating internal combustion engine in which each cylinder has a piston at both ends, and no cylinder head.Whereas the radial engine is a reciprocating type internal combustion engine configuration in which the cylinders point outward from a central crankshaft like the spokes on a wheel.
Raymond DeWalt invented the first radial arm saw in 1922. The original name that Raymond DeWalt gave his invention, the radial arm saw, was the name "Wonder Worker".
Quite possibly. The radial tire was invented in the 1940's and became widely used in the US during the 1970's. Radial tires should not be confused with steel-belting which is used to strengthen the tread resistance to puncturing in both radial and the older bias-ply tires.