Aerospace Engines A to Z
Aerospace Engines A to Z

Updated: 09-Jul-2020

Messpa was an engine manufacturer from 1909 to 1913. Their 5-cylinder radial was known as "Helium" (see). It gave 100 CV at 1,200 rpm.

-Another engine of this brand gave 80 hp at 2,000 rpm. It was an unconventional two-cylinder engine from 1913.

-In 1909 an experimental engine was built by this brand.

-It consists of two cylinders with two opposed pistons each. One crankshaft at each cylinder end and running with the two-stroke cycle.

Messpa opposed piston engine schematic drawing
"Messpa opposed piston engine, schematic drawing"

-At the rear it has two flywheels that regularize the rotation of each crankshaft.

-At the front we see a transmission with bevel gears driving each crankshaft to conjugate the piston positions.

Engines of MESSPA

Model: 2 cyl. 4 opposed. pistons

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

Other details:
Model: 5 cyl. radial, “Helium”

Arquitecture: 5-cylinder Radial
Cooling:
Total Displacement:
Bore / Stroke:
Power: 100 CV @ 1200 rpm
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