I’ve noticed that many Merlin part numbers have the prefix letter ‘D’ as the first character but others seem to carry the prefix letter ‘E’.
What is the significance of this letter; did all parts designed for the Merlin carry this ‘D’ prefix?
What is the significance of the ‘E’ prefix; were these parts carried-over from another engine?
By: MerlinPete - 11th December 2009 at 09:27
Very interesting…..you don’t have a list of prefixes do you?
There is, but I wouldn`t know where to start looking for it. If it turns up I will post it on here.
A, F, G and K are another 3 which crop up quite often, and, of course GN, which are Griffon parts subsequently fitted to the Merlin.
There are also quite a few dual prefixes, most common is KB which often applies to studs, I seem to recall that this is not from an earlier engine, but I can`t be sure about that.
Tooling is often prefixed HB (I wondered if this stood for Harvey Bailey), but again there are tools with D and E prefixes, so there was no particular logic. Packard tools are prefixed AT.
By: Creaking Door - 11th December 2009 at 00:05
Very interesting…..you don’t have a list of prefixes do you?
By: MerlinPete - 10th December 2009 at 23:42
Merlin-specific numbers are D prefixed.
The E prefix applies to the Kestrel, so parts which were originally designed for that engine and were subsequently used on the Merlin kept the E.
Prefix letters applicable to some of the other earlier engines also appear on Merlin LOPs.
Pete
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December 10, 2009 at 10:47 pm