Hang on, in BSP4, it states X12 had a BRJ.824 of 18 inches diameter.
So who's right there or is that just different designations of the same ramjet?
Just speculating here, but RP.25 used a BS.1001 ramjet and its definately larger than SeaDart in size and diameter.
Hang on! Reading the revelent parts of BSP. This may all be down to printing errors?
Since in Chapter 13 we're told.
BS.1001 is a 13 inch diameter for the Bloodhound NIGS
Then we see BS.1002 is a integrated unit.
BS.1003 is for SIGS in RP.25
Then BS.1004 is 20inches and used on RP.21
BS.1005 a 21.5inch for X.12.
However in Chapter 8
X.12 uses a BRJ.842 of 18 inches.
And that BS.1003 is used in CF.299 SeaDart, which has a diameter of 16.5 inches.
So what might account for this could be just that the technology represented in BS.1003 is used or scaled to CF.299?
Euqaly it would not be clear then what diameter RP.21's engine(s) actualy would have.
