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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 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:

Normally we get donations of manuals that are directly related to the operation and maintenance of WWII aircraft, but the vector plotting machine manual below is a deviation from that. This short document tells you how to use this tool in navigating, and is definitely worth a look!
Installation, Operation & Maintenance of the Vector Plotting Machine, AN-5748
  

  
 

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.

R-680 and R-680E, E-202-3, 29-Oct-1951 
E-223-A1 and O-235, E-223-7, 30-Mar-1955
O-435 and GO-435, E-228-14, 23-Aug-1957
O-435 and GO-435, E-228-15, 16-June-1959 O-290, E-229-11, 30-Mar-1955
O-290, E-229-12, 8-May-1959
GS0-580, E-256-5, 22-April-1955
GS0-580, E-256-6, 22-April-1959
O-320, E-274-5, 28-Feb-1959
O-320, E-274-6, 20-Nov-1959
O-320, E-274-7, 20-April-1960
GO-480, E-275-4, 11-July-1956
GO-480, E-275-6, 9-Dec-1959
GSO-435-B and GSO-435-B2, E-276-2, 22-April-1955
GSO-435-B and GSO-435-B2, E-276-3, 4-May-1959
O-340 and O-340-A1A, E-277-3, 12-Mar-1956
O-340-A1A, 0-340-A2A, and O-340-B1A, E-277-4, 12-Mar-1959
0-320 and O-320-A2A, E-274-4, 5-Dec-1955
O-435 and VO-435, E-279-2, 2-Dec-1955
O-435 and VO-435, E-279-3, 12-Mar-1959
O-435 and VO-435, E-279-4, 27-April-1960
O-480 and GSO-480, E-284-2, 21-Aug-1957
O-480, GSO-480 and IGSO-480-A1A6, E-284-3, 27-Feb-1959
O-480-1, GSO-480, and IGSO-480-A1A6, E-284-4, 27-Nov-1959
SO-580-A1A, SO-580-A1B, and VSO-580-A1A, E-285-1, 14-June-1956
SO-580-A1A, SO-580-A1B, and VSO-580-A1A, E-285-2, 30-Mar-1959
O-360-A1A and O-360-B1A, E-286-2, 15-June-1956
O-360, E-286-3, 19-Feb-1959
O-360, E-286-4, 25-Sept-1959
O-360, E-286-5, 25-Nov-1959
O-360, E-286-6, 27-April-1960
O-540-A1A, E-295-1, 12-Nov-1957
O-540-A1A and O-540-A2B, E-295-2, 4-Mar-1959
O-540, E-295-3, 8-Oct-1959
O-540, E-295-4, 22-Mar-1960
VO-540-A1A and VO-540-A1B, E-304-1, 2-July-1959
  

Hamilton Standard Service Bulletins:

We're finally nearing the end of processing and uploading this massive set of Hamilton Standard data. One we wrap up, we'll give a final count of the number of Service Bulletins that were contained in this collection, and I think we'll all be impressed by that figure!
Blade Face Alignment Measurements For Revealing Accidental Bending Damage, No. 546, 14-Feb-1958
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