Cummins goes to 1075 lb-ft

[Signal73]

Right, they went to the trouble to Photoshop on a 2019+ EGR valve, turbo, water inlet & inlet, etc, too. You got me.

I have seen it before! If the 21 has a CP3 next time you are in CT I owe ya a beer...

 

[TFucili]

There is nothing like "The Big Round Sound"!

 

[DonFitzwater]

The R3350 is a Wright Duplex-Cyclone. The ones I worked on in Fairbanks were very advanced. The were fuel injected directly into the cylinders, electronic ignition with scope in the engineers station, 2 speed superchargers, and equipped with the PRTs. They were rated at 3500hp each. For the 50s, they were like exotic cars, very advanced and on the bleeding edge of aviation technology at the time. Most aviation piston engines really haven’t advanced any further since these.

The Pratt R4360 Wasp Major made the R3350 look like a small engine and they were essentially direct competition with each other. We had a few sitting in the yard that were turbo compounded. In other words they were turbo and supercharged. 28 cylinders, 4 four rows of 7 cylinders, 56 spark plugs. The R3350 was a 18 cylinder engine, two rows of 9. It was easily 1/3 smaller or more with the same power and obviously less weight.

Still very cool stuff. I really liked working on round engines. They don’t leak oil.


They mark their territory..... lol


Sorry for the derail fellas.

What did you work on up here?

 

[dieselshadow]

What did you work on up here?

DC-4s, DC-6s, DC-7C, and some other miscellaneous birds that happened to be on the ramp. Almost got to play with a turbine conversion DC-3 once. After doing that for a few years I ended back working on helicopters. Mostly Bell 206s, 407s, 212s, and 412s. Occasionally a Eurocopter would drop in like a BO-105.

 

[DonFitzwater]

DC-4s, DC-6s, DC-7C, and some other miscellaneous birds that happened to be on the ramp. Almost got to play with a turbine conversion DC-3 once. After doing that for a few years I ended back working on helicopters. Mostly Bell 206s, 407s, 212s, and 412s. Occasionally a Eurocopter would drop in like a BO-105.

NAC?

 

[dieselshadow]

NAC?

Close. A competitor. A lower budget competitor.

 

[AKDoug]

Close. A competitor. A lower budget competitor.

Ahh... Everts then.