It's All About Propellers & Engines This Week - Allison and Lycoming Engines That Is!
But before we get into all that, I'd like to share a neat user story. Several weeks ago a gentleman named Joel Wirth reached out to me with some questions about how the water injection system is positioned in the P-47. After a quick discussion I learned that he and his father have built a "modified roadster", or vintage-class racer, that has set 6 records to date!
Both Joel and his father are engineers, and have used a 1927 Model T frame to build the only car (that runs on gasoline) to go over 300mph at Bonneville Salt Flats, and over 250mph at El Mirage Dry Lake.
They want to understand how the water injection system works so that they can incorporate the P-47 design into the vehicle to help it go even faster - pretty awesome! I found some diagrams for them in a few P-47 manuals, and also several drawings to help them out. In an interesting coincidence one of the new manuals this week also deals with this topic: Installation Flight Test for R-2800B Turbosupercharged Engines with Water Injection. It's so fun to feel like I've helped projects like this, and wish Joel all the best at their upcoming race!!
Click here to read an article that was written about their project back in 2020, and click here to check on the latest progress of our P-47 Thunderbolt restoration!
Allison Engine Training Video Series:
I need to say a few words about these documents because they are so cool! Many of you may know or have heard of Dan Whitney, the guru of all things V-1710. You might say he wrote the book on it - oh wait, he did! The book is titled "Vee's for Victory! The Story of the Allison V-1710 Aircraft Engine 1929-1948".
As you might imagine, Dan has some great stuff in his collection, and this week was kind enough to share 11 Allison training slideshows with me. We've combined these into PDF's for easier viewing. Each link below is for a different training reel, and are definitely worth a look - enjoy!
V-1710 E & F Allison Liquid Cooled Aircraft Engines
Servicing the Ignition System on the Allison V-1710
Timing Check Flight Line Procedure for the Allison V-1710
Preflight Inspection for Allison V-1710
Unboxing, Preparation, and Installation for the Allison V-1710 Engine
Preparing the Allison V-1710 and Reduction Gear Unit for Installation on the P-39
Removing the Allison V-1710 from the P-39
Removal and Installation of the Allison V-1710 E Reduction Gear Assembly in the P-39
Auxiliary Supercharger for the Allison V-1710-93 Engine
Power Take-Off Disassembly & Assembly for the Allison V-1710-93
Have an interest in Dan's book? Then there are several others you might like: "The Secret Horsepower Race: Western Front Fighter Engine Development" was published in 2020 by AirCorps Library user Calum Douglas, and is a very technical, engineering centered look at piston engines. "The Merlin: The Engine that Won the Second World War" by Gordon Wilson is also a good one, and has an intro written by Steve Hinton Jr. And then there is Graham White's "R-2800: Pratt & Whitney's Dependable Masterpiece" which is close to our hearts as we move into the final stages of finishing our P-47.
Miscellaneous Manuals:
Instructions for Pesco High Pressure Oil Pump, June-1943
Sperry Bombsight Type S-1 with M-2 Modifications, Inst No. 14-8035B, Nov-1943
Lycoming Engine Standards:
Last week we added a unit for Continental Engine Specifications, and this week Lycoming is in the spotlight! There are now 36 new specs in the Lycoming specs unit. What do we mean by engine specifications? These documents "specify" items like max horsepower, minimum fuel levels, compression ratios, and more for each engine model. In the documents below, the model of engine is listed as the title, and the alphanumeric series following the linked title is the spec number.
Hamilton Standard Service Bulletins:
Blade Face Alignment Measurements For Revealing Accidental Bending Damage, No. 546A, 25-July-1958
Lead Wire Change on 5U18 Constant Speed Control Electric Head Receptacle, No. 547, 11-April-1958
Change of Servo Valve Spring Length, No. 548, 11-April-1958
Servo Valve Pressure Setting Change, No. 548A, 26-May-1958
Change of Servo Valve Spring Length, No. 548B, 23-Jan-1959
22D30 Propeller Replaceable Distributor Valve Spring Housing Liner, No. 550, 30-April-1958
Revised Blade Repair Dimensional Tables, No. 552, 12-May-1958
Revised Blade Repair Dimensional Tables, No. 552A, 18-July-1958
Revised Blade Repair Dimensional Tables, No. 552B, 14-Feb-1958
Revised Blade Repair Dimensional Tables, No. 552C, 8-Sept-1959
Servo Valve Spring Displacement, No. 553, 5-May-1958
Removal of 34E60 Dome Preload Shim Retainer, No. 554, 29-May-1958
New Spinner Nose Support Rubber Bushing, No. 555, 5-June-1958
2H17AC3 Blade Operational Life, No. 559, 3-July-1958
Separate Feathering Valve Type Constant Speed Controls, No. 561A, 12-Dec-1958
Low Temperature External Seal Installation on 34E60, 43E60 and 43H60 Propellers, No. 563, 25-July-1958
Low Temperature External Seals, No. 563A, 19-Feb-1960
5U21 Constant Speed Control Forged Bodies and Bases, No. 567, 11-Sept-1958
CAA Publications Approval, No. 570, 17-Oct-1958
Pitch Lock Transfer Tube and Valve Lifter Change, No. 573A, 15-May-1961
Operating Recommendations and Barrel Rework for 33E60-6801-6, No. 581
Operating Recommendations and Barrel Rework for 33E60-6801-6, No. 582