Warbird Information Exchange

Two scans from AIRCRAFT ENGINES OF THE WORLD:





Christer

Edited: The 130-series were the last military engines compared to the 620-series civil (transport) engines. The differences in power and power settings are not as great as was alleged in an earlier post.

Thanks Christer! Is there a way to rotate the datasheets? I'm getting a
"crick" in my neck reading them!

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airnutz,
Your wish is my command ...... ...... !

Christer

Hi Randy!


There was a Merlin 724 and the designation of the modified V-1650 indicates that the bits and pieces came from that version.

A wee bit confusing ...... ...... do You have any means of confirming that the bits and pieces came from the Merlin 620/622?

Christer

The 622 parts that were used by Cavalier were (quote from a knowledgeable source) "Merlin 622 cylinder banks, heads, and other late-model improved parts bolted on." This was a modification devised by Cavalier's engine shop working directly with engineers from Rolls Royce, who provided tech data to Cavalier to make the conversions.

As a Merlin expert pointed out to me (on an internet forum!), there is a difference between the Merlin 724 (made in England by Rolls Royce) and the V-1650-724A (based on a Packard -7 and modified with 622 parts). The V-1650-724A designation was *never* an official Rolls Royce or Packard designation, but one made up by Cavalier to satisfy the FAA that the "new" engines were simply modifications of existing engines.

Thanks for the clarification!

I guess the designation can be read as V-1650-7 with the addition of 24A to make it V-1650-724A and the connection with the Merlin 724 is lost. It can also be read as V-1650-724A, indicating that it had been brought up to the latest standard. I guess that the 622 and the 724 had a lot in common.

Christer

For those that are interested, here is a shot of a mechanic working on a Merlin in Korea...
http://community.webshots.com/photo/349 ... 5527NCWPpf

Mike

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