Aerospace Engines A to Z
Aerospace Engines A to Z

Updated: 08-Aug-2019

(Former Rockwell JLO). Engines designed especially for ULM.

-All are two-stroke engines. Outstanding was the single-cylinder "215" that gave 20 hp with a displacement of 214 cc.

-The very similar "340" with 338 cc and the twin-cylinder "430" with 428 cc.

Cuyuna 430 cutaway
"Cuyuna 430 cutaway"

-Some had direct transmission and others belt gear.

-We saw them installed on the Quicksilvers and the Pterodactyls, first generation of ULMs.

-The Cuyuna and the JLO engines were almost identical and had many interchangeable parts.

-In fact the original Cuyunas were installed in American snowmobiles in the style that Austrian Rotax is doing now.

Cuyuna pusher
"Cuyuna pusher"

-Due to the modular shape of the cylinders and air flow through their fins, a single fan could cool all the cylinders.

-Each cylinder has its contact, its coil and its electric capacitor.

-If the engine is a "430-D" it has direct transmission and if it is a "430-R", it has reduction gear.

-It can be operated upright or inverted. Starting, as we see, is done by a start puller.

Cuyuna invertido
"Cuyuna invertido"

-The Cuyuna ULII-02 and the "Pave Tiger" engines responded to military orders for RPV (Remotely Piloted Vehicle).

Engines of CUYUNA

Model: 2si-215

Arquitecture: 2-stroke Single-cylinder
Cooling: Air
Total Displacement: 214 cc
Bore / Stroke:
Power: 20 HP
Weight:

Other details:
Model: 2si-230

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

Other details:
Model: 2si-340

Arquitecture: 2-stroke Single-cylinder
Cooling: Air
Total Displacement: 338 cc
Bore / Stroke:
Power:
Weight:

Other details:
Model: 2si-460

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

Other details:
Model: 2si-540

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

Other details:
Model: 2si-690

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

Other details:
Model: 2si-808

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

Other details:
Model: Cuyuna 430

Arquitecture: 2-stroke2-cylinder In-line
Cooling: Air
Total Displacement: 428 cc
Bore / Stroke:
Power:
Weight:

Other details:
Cuyuna - 430 engine cutaway

"Cuyuna - 430 engine cutaway"

Model: Cuyuna 430D

Arquitecture: 2-stroke2-cylinder In-line
Cooling: Air
Total Displacement: 338 cc
Bore / Stroke:
Power:
Weight:

Other details:

Direct transmission to the propeller

Model: Cuyuna 430R

Arquitecture: 2-stroke2-cylinder In-line
Cooling: Air
Total Displacement: 338 cc
Bore / Stroke:
Power:
Weight:

Other details:

With reduction gear.

Model: Pave Tiger

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

Other details:
Model: UL-II-20

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

Other details: