Shaft mounted plus three gear driven chargers!!

[jjohn]

Radial Engine Cut Away



Hello All, I just returned home from a small New York City vacation with my daughter museum hopping while my wife was doing her Business thing.



One stop was the Navy museum where the Intrepid Aircraft carrier is. I took a picture of a Banked Radial Engine off one of the airplanes from the 40's showing the Air Charging system. There is a Large shaft mounted charger with 3 gear driven chargers every 120 degrees. Cool!

Hope you enjoy this Large Picture 1. 2 MB. I left it large to keep the detail.

 

[Chris N5CWM]

Awesome pic! It's amazing how much power those Wright 3350's put out! 3,500 HP was the highest rating, turbocompound. . gotta figure out how much torque that is.



http://www.shanaberger.com/engines/R-3350.htm

 

[jjohn]

Chris, Thanks for the link

You sure seem to know your Aircraft Engines. Here is one for you

ENGINE HISTORY



I had a whole different idea as to what the three geared turbines were doing! These are exhaust turbines assisting the main shaft rather than the shaft turning compressors... interesting.



From: EngineHistory.com

Near the end of World War II, someone got the idea to

harness the wasted energy in engine exhaust by using

the exhaust to drive a turbine that was coupled to the

engine crankshaft. This process is called turbocompounding.

Although numerous engines had

experimental test programs with turbo-compounding,

only the Wright R-3350 Turbo Cyclone ever saw wide

service. Referring to Figure 18, notice the three large

pressure recovery turbines spaced equally around the

aft side of the engine. Each of these was fed by the

exhaust from six cylinders and contributed nearly 200

additional horsepower (600 total) to the engine output.

Another advantage of turbo-compounding is the

exceptionally good fuel consumption.

 

[Chris N5CWM]

You want to get into the real nittygritty, read this!



http://www.enginehistory.org/Wright/R-3350Int&Ex.pdf



I love the round engines. I've never flown a plane with one.

My office is the cockpit of Boeing 757s and B767s. The round engines were way before my time.

 

[jjohn]

Ah. . I to am a pilot. . not current however mostly C182 time but my share of 320 and 414 twin time. I always wanted a 195.



My biggest thrill was being a crew member on the S. A. C. "SAVE A CONNIE" Super G Constellation at the world freefall convention.



I sat in the jump seat behind left seat give heading corrections to the pilot from the spotter in the rear door via hard wire phone. What a Great experience! I understand your love of round Engines! I miss flying a great deal. What is a DC-7B? I have jumped out of a DC-4 and know that plane well. Time for GOOGLE again I guess.

JJ



Got it...



http://www.prop-liners.com/dc7btech.htm[/URL]

 

[Chris N5CWM]

Connie experience

I was driving down the road near the CXO (Conroe TX airport) and as I went by the approach lights outside the airport fence, I heard a huge rumbling which startled me. . looked to my left towards the runway just in time to see a Super Constellation touch down! Drove in and got a nice look at her. I can't remember which organization it belonged to. Recently I heard there are less than a handful left flying in the world! Man I wish I had my camera that day!

 

[gitchesum]

Hmm, didn't know Conroe had an airport.

Did it used to be a Walmart?

 

[Sticks]

Pratical application for us

#ad




Hmmmmmmm

 

[LarryB]

I'v always dreamed of building a pulling tractor using a couple of these:





#ad

 

[jjohn]

Hey Sticks.. whats the story on that pic?

Look interesting.



LarryB,

I don't know how you would keep it cool, not much air moving across those heads at a tractor pull... . BUT hey I would pay to watch!

 

[Sticks]

Hey Sticks. . whats the story on that pic?

Saab Scania Corp.

 

[jjohn]

Thanks Sticks

A little time on google and I found this. . Diesel Related... "interesting on turbo lag support" from electric Turbocompounding...



Mechanical Turbocompounding

Existing turbocompound technology consists of a conventional mechanical

turbocompound system. The system includes a conventional turbocharger which

recovers exhaust energy in a turbine to boost the air coming into the engine in a

conventional fashion.

Downstream of the turbocharger turbine, the exhaust gas goes through a second

turbine. The energy recovered here is added to the engine torque through a

system of shafts, gears and a fluid coupling.

The objective of this program is to demonstrate the recovery exhaust energy

electrically by using high speed generator technology. Electric turbocompounding

eliminates the mechanical coupling to the engine crankshaft necessary in

mechanical turbocompounding. This provides more flexibility in packaging. The

electric turbocompound system also provides more control flexibility in that the

amount of power extracted can be varied which allows control of engine boost.

Also, the generator can be operated as a motor to spin up the turbo more quickly

to improve turbo response. The electric turbocompound is a natural fit in a

vehicle equipped with More Electric technology.

Caterpillar is using past experience in mechanical turbocompounding to aid in

developing the electric turbocompound system. The high performance

turbomachinery will be married with emerging high-speed generator technology.

Here:

DOE OSTI