RR Merlin- what are 'transport heads/banks' ?

[Christer]

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.

Last edited by Christer on Mon May 30, 2005 1:59 pm, edited 2 times in total.

[airnutz]

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

[Christer]

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

Christer

[Christer]

Hi Randy!

He and some other investors bought six Northstars and a number of Merlin 620/622 engine spares.

The engines that TFA built up for Mustangs which used the transport parts were called the Merlin V-1650-724A.

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

[Randy Haskin]

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?

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.

[Christer]

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

[mrhenniger]

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