CAD Models and Animations


CAD Models Created by Randy Huff

BMW 803A

 

Lawrance L-1

The Lawrance L-1 was developed during 1918 for a small U.S. Navy seaplane, designed by Grover Loening and called the Kitten. The L-1 had a bore of 4.25", a stroke of 5.25", displaced 223.4 in³, produced 56.5 hp at 1,600 rpm, and weighed 147 lb. Developed further, a few L-4s were sold to the U.S. Army Air Service to power Sperry Messenger liaison airplane.

 

Lawrance R-1

Using nine cylinders that were virtually identical to the Lawrance L-series engines, the R-1, developed during 1919, displaced 670.3 in³, produced 147 hp at 1,600 rpm and weighed 438 lb. The R-1 had three Stromberg M4 carburetors, each supplying three cylinders. Four R-1s were built, and one passed a 50-hour endurance test in 1921.
 

 

 

Lawrance J-1

The U.S. Navy issued Lawrance a contract on 28 Feb 1920 for five engines, which were designated J-1. This new engine was built along the same lines as the R-1, but was larger. With a bore of 4.5" and a stroke of 5.5", the J-1 displaced 787.3 in³, produced 200 hp at 1,800 rpm, and weighed 476 lb. It had a compression ratio of 5.17:1 and a specific fuel consumption of 0.556 lb/hp/hr.
Drawing from experience with the R-1, the J-1 featured several design improvements that included a strengthened crankcase, thicker cylinder base flanges, a more generous fillet between the cylinder flange and skirt, larger valve springs, rocker arms, and crankshaft counterweight. Three Stromberg NA-S4 carburetors were used, more cooling fins were added to the cylinder head tops, and taller rocker arm attachment bosses were incorporated. The J-1 was a success that eventually led to the merger of Lawrance and Wright Aeronautical.

More on the J-1

 


Animations Created by Sergio Pasquali

Daimler-Benz DB 601

 

Daimler-Benz DB 606

 

Pratt & Whitney R-4360

 

Siemens-Halske Sh3

 

BMW 803A

 

Napier Sabre

 

 

Junkers Jumo 205

 

Valve Gear Studies

Allison V-1710 Rolls-Royce Griffon Junkers Jumo 222

 


CAD Images by Ugo Vicenzi

 

Wright R-3350TC
Power Recovery Turbine and Supercharger Impeller

Wright R-3350TC
Rear Cutaway

Wright R-3350TC
Sectioned View of Complete Engine

Wright R-3350TC
Longitudinal Cross Section

Wright R-3350TC
Exploded View of Front Components

Wright R-3350TC
Sectioned Rear View

Fiat A80
Exploded View

Fiat A80
Sectioned View

Fiat A80
Exploded Rear View

Fiat A80
Exploded Front View

Fiat A80
Rear View

Isotta Fraschini Asso 750
Display Presentation

Isotta Fraschini Asso 750
Sectioned View

Isotta Fraschini Asso 750
Line Drawing

Isotta Fraschini Asso 750
Exploded View

Isotta Fraschini Asso 750
Crankcase Detail

Isotta Fraschini Asso 750
Crankshaft and Camshafts