Aerospace Engines A to Z
Aerospace Engines A to Z

Updated: 16-Apr-2021

(see Pigman, American Flyers, Leblond and Rearwin) Manufacturer of the Leblond-Rearwin engines (see).

-Especially the 5D of 60 hp, the 5E of 70 hp, the 5F of 90 hp, the 5G. As well as the 5DE and 5DF.

-With 7 radial cylinders there were the 7F, 7DF or DG, from 110 to 120 HP.

Ken Royce 5-D
“K-R 5D”

Ken Royce 7D
“K-R 7D”

-The 5-cylinder radial gave 90 hp at 2,250 rpm. US Military reference R-265-1.

Engines of KEN - ROYCE

Model: 5-D, -DE, -DF

Arquitecture: 5-cylinder Radial
Cooling:
Total Displacement:
Bore / Stroke:
Power: 60 HP
Weight:

Other details:
Ken Royce 5D

"Ken Royce 5D"

Model: 5E

Arquitecture: 5-cylinder Radial
Cooling:
Total Displacement:
Bore / Stroke:
Power: 70 HP
Weight:

Other details:
Model: 5F

Arquitecture: 7-cylinder Radial
Cooling:
Total Displacement:
Bore / Stroke:
Power: 90 HP
Weight:

Other details:
Model: 7F, -DF, -DG

Arquitecture: 7-cylinder Radial
Cooling:
Total Displacement:
Bore / Stroke:
Power: 120 HP
Weight:

Other details:
Ken Royce 7D

"Ken Royce 7D"

Model: R-265-1

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