GregP
Major
Hi Wayne,
I said what I intended to say, and I said it clearly. The Curtiss XP-37 was both supercharged and turbosupercharged. How much more clear can it be?
The supercharger was integral with the auxiliary section and the turbosupercharger was external and fed the supercharger. They moved the cockpit to the rear to clear all the plumbing.
Allison V-1710 were built in many configurations. They were built as:
1) Normally aspirated:
Note the clear absence of the auxiliary-stage supercharger in this airship engine.
2) Supercharged:
Standard F-Series V-1710 above, with splined propeller shaft and integral supercharger in the auxiliary stage fed by the carburetor. The power section is the crankshaft and cylinders, the nose section is the prop shaft and associated gears. The auxiliary section contains the supercharger, the carburetor, the starter (not shown above ... there is a circular plate bolted one instead), the generator (same as starter above ... circular plate bolted on). So, this engine may well be able to run, but you can't start it! The round torus-shaped thing at the bottom rear is the water pump. The stainless line coming from the carburetor to the supercharger housing feeds fuel directly into the supercharger impeller.
3) Supercharged and turbosupercharged as in the P-38:
Note the turbocharger located in each nacelle boom right at the trailing edge of the wing. I haven't seen a pic of the P-38 setup outside of the P-38 with just the engine and the turbocharger assembly.
4) Turbo-compound:
Note the turbocharger in the auxiliary stage. The high-pressure air feeds the carburetor without an intercooler.
5) 2-stage supercharged:
Auxiliary supercharger stage has the carburetor and it feeds the supercharger impeller directly, without an intercooler.
6) Remote rear drive, as in the XB-42:
The contra-prop would be at the rear of the fuselage, with one V-1710 driving each prop.
7) A proposed V-3420 medium bomber with two V-3420s driving VERY larger propellers:
There are more configurations, but this covers some of the proposed applications.
I said what I intended to say, and I said it clearly. The Curtiss XP-37 was both supercharged and turbosupercharged. How much more clear can it be?
The supercharger was integral with the auxiliary section and the turbosupercharger was external and fed the supercharger. They moved the cockpit to the rear to clear all the plumbing.
Allison V-1710 were built in many configurations. They were built as:
1) Normally aspirated:
Note the clear absence of the auxiliary-stage supercharger in this airship engine.
2) Supercharged:
Standard F-Series V-1710 above, with splined propeller shaft and integral supercharger in the auxiliary stage fed by the carburetor. The power section is the crankshaft and cylinders, the nose section is the prop shaft and associated gears. The auxiliary section contains the supercharger, the carburetor, the starter (not shown above ... there is a circular plate bolted one instead), the generator (same as starter above ... circular plate bolted on). So, this engine may well be able to run, but you can't start it! The round torus-shaped thing at the bottom rear is the water pump. The stainless line coming from the carburetor to the supercharger housing feeds fuel directly into the supercharger impeller.
3) Supercharged and turbosupercharged as in the P-38:
Note the turbocharger located in each nacelle boom right at the trailing edge of the wing. I haven't seen a pic of the P-38 setup outside of the P-38 with just the engine and the turbocharger assembly.
4) Turbo-compound:
Note the turbocharger in the auxiliary stage. The high-pressure air feeds the carburetor without an intercooler.
5) 2-stage supercharged:
Auxiliary supercharger stage has the carburetor and it feeds the supercharger impeller directly, without an intercooler.
6) Remote rear drive, as in the XB-42:
The contra-prop would be at the rear of the fuselage, with one V-1710 driving each prop.
7) A proposed V-3420 medium bomber with two V-3420s driving VERY larger propellers:
There are more configurations, but this covers some of the proposed applications.
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