Aerospace Engines A to Z
Aerospace Engines A to Z

Updated: 03-Nov-2023

The S5-125 125 HP radial engine was the one used by Kinner in his Auster S1B aircraft.

-On the S1A plane he mounted the Kinner K-5.

-The Security Aircraft Corp, was prepared by Mr. Kinner,

-The company became the American Aircraft Company in 1939.

-The first engine was the S-5-120 which gave 125 HP later it was redesignated as S-5-125.

Security-Kinner S-5-125, fig. 1
Security-Kinner S-5-125, fig. 2
“Two views of the S-5-125 engine”

Engines of SECURITY-KINNER

Model: S5-120

Arquitecture:
Cooling:
Total Displacement:
Bore / Stroke: x
Power:
Weight:

Other details:
Model: S5-125

Arquitecture:
Cooling:
Total Displacement:
Bore / Stroke: x
Power:
Weight:

Other details:

The author of this edition of Aeroengines AtoZ, through Aeroteca, collaborated on Version 2 of this video, which is presented here.

To understand the operation of the connecting rods, the 1929 Continental R 670 single-cylinder engine was chosen.

A demonstration of Version 3, improved at the author's suggestion, is also available on YouTube at a later date. This version shows bronze valve guides, improved valve spring movement, and the split crankshaft counterweights and front bearing balls also move.

The design is from Juan Soler, Sant Cugat, Barcelona

Below we show a flash of version 3

Counting also with the coloboration of JMC of Enginys Mecanics in Mataro, Barcelona