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  Topic: Sleeve valved engine cylinder changes.
avasko

Replies: 0
Views: 23

PostForum: British Engines   Posted: Fri Mar 01, 2024 16:19   Subject: Sleeve valved engine cylinder changes.
Having changed cylinders on the R-2800 and various R-3350 engines, all poppet valve types, I became curious on how you did so on the Bristols.
True the cylinder came off similarly to the poppet engin ...
  Topic: V-1710 with RR Merlin Supercharging
avasko

Replies: 0
Views: 27

PostForum: Allison Engines   Posted: Fri Mar 01, 2024 15:51   Subject: V-1710 with RR Merlin Supercharging
The V-1710 suffered greatly from its original customer requirements. Airship engines did not demand great amounts of supercharging. The Air Corp's fascination with turbo-supercharging probably limited ...
  Topic: Wrong ADI fluid causes engine failure
avasko

Replies: 4
Views: 5035

PostForum: Authors' Corner   Posted: Sun Apr 30, 2023 20:34   Subject: Wrong ADI fluid causes engine failure
One little noticed form of water injection was used on international variants of the DC-8. Since no APU was on the aircraft you would be stuck with no way of starting engines if no huffer (ground air ...
  Topic: Crankcase
avasko

Replies: 18
Views: 5645

PostForum: Wright Engines   Posted: Mon Mar 27, 2023 18:11   Subject: Stee and aluminum Cases
Crankcases, steel or aluminum (WAD vs P&W) didn't seem to fail. However, a mechanics view of the differences may be biased.
As mentioned, WAD steel crankcases used cap bolts on special conical wa ...
  Topic: Crankcase
avasko

Replies: 18
Views: 5645

PostForum: Wright Engines   Posted: Mon Mar 27, 2023 18:09   Subject: Stee and aluminum Cases
Crankcases, steel or aluminum (WAD vs P&W) didn't seem to fail. However, a mechanics view of the differences may be biased.
As mentioned, WAD steel crankcases used cap bolts on special conical wa ...
  Topic: Military. Vs civilian models
avasko

Replies: 6
Views: 1388

PostForum: Wright Engines   Posted: Wed Mar 22, 2023 23:36   Subject: Correction
I inadvertently used VC-118 (Douglas DC-6) when I meant VC-121 (Lockheed L-749) in my preceding post.
Many of the Lockheed VC-121A Connies were named, example being Bataan for Gen Douglas McArthur. ...
  Topic: Lockland Investigation - Arthur Nutt Papers
avasko

Replies: 1
Views: 463

PostForum: Wright Engines   Posted: Tue Mar 14, 2023 19:20   Subject: Investigation of Wright Aero
This is a great find. From books and post here and other source Wright scimped on its engineering people. The Truman report pointed at Wright Aero as being a problem. Pratt outsouced its engine to car ...
  Topic: Engine Cooling Fans
avasko

Replies: 17
Views: 6576

PostForum: Technical Discussion   Posted: Tue Feb 14, 2023 17:07   Subject: Martin Flying Boat fans
Tom, the PBM-5 switched away from the Wright R-2600 to the P&W R-2800.
Probably didn't need them with the swirch.
I would imagine the Mars needed fans with early R-3350 now maskinf four US airc ...
  Topic: Engine Cooling Fans
avasko

Replies: 17
Views: 6576

PostForum: Technical Discussion   Posted: Mon Feb 13, 2023 19:54   Subject: Cooling Fans Again
Not to beat a dead horse but, if the Rotol numbers are correct, the installation of a cooling fan costs little weight or engine power. I grant this is a sales brochure. Some Bristol engines came with ...
  Topic: Military. Vs civilian models
avasko

Replies: 6
Views: 1388

PostForum: Wright Engines   Posted: Sun Jan 15, 2023 22:58   Subject: Military. Vs civilian models
I don't believe the USAAF retained any C-69's. At Lockheed in NY, we had a very weary L-049 come through flying for a non-sched airline. Its main landing gear doors looked peculiar. They had a piece o ...
  Topic: R-4360 - Turned vs non turbo'ed Rel;iability.
avasko

Replies: 2
Views: 1130

PostForum: Pratt & Whitney Engines   Posted: Tue Dec 20, 2022 20:22   Subject: R-4360 - Turned vs non turbo'ed Rel;iability.
Lacking the maintenance or overhaul manuals for the types makes getting numbers hard.
Having had to do whole engine (18 cyl)valve clearance checks, I shudder to think of doing it on a corncob. Messy ...
  Topic: R-1830 for Hump duty
avasko

Replies: 3
Views: 3876

PostForum: Pratt & Whitney Engines   Posted: Mon Dec 12, 2022 20:47   Subject: Maybe a little late?
There were many R-1830 engine models with two-speed single stage superchargers. However, most C-47/R4D had single speed, single stage superchargers, typically the R-1830-92. The aircraft had no need t ...
  Topic: Oil Skate?
avasko

Replies: 8
Views: 2218

PostForum: Pratt & Whitney Engines   Posted: Mon Nov 28, 2022 18:44   Subject: Oil Skate?
Oil skates? Granted I had little contact with the big Wasp Major. It would appear that "oil skates" were a design feature beloved by them. Fortunately, they kept them inside the engine.

...
  Topic: R-4360 Direct Fuel Injection
avasko

Replies: 2
Views: 763

PostForum: Pratt & Whitney Engines   Posted: Sat Nov 26, 2022 23:21   Subject: R4360 Direct Injectyion System
A little investigation shows the Direct Fuel Injection System on the R-4360-53 is the Bendix 100-28-A5. Other engines in the range of the -53 model in the P&W list show fuel injection but none wer ...
  Topic: R-4360 - Turned vs non turbo'ed Rel;iability.
avasko

Replies: 2
Views: 1130

PostForum: Pratt & Whitney Engines   Posted: Tue Oct 11, 2022 21:44   Subject: R-4360 - Turned vs non turbo'ed Rel;iability.
R-4360 Turbo-Supercharged vs Non-Turbo Problems
My opnly experience with this engine was during conversion of ex-UAL B.377 to then BOAC requirements. A tremendous effort for ALL the wiring looms were ...
 
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