LH707330 From United States of America, joined Jun 2012, 1194 posts, RR: 1 Posted (2 years 12 months 17 hours ago) and read 5561 times:
I've done a few photo searches, but can't find a conclusive answer to this question. I know they removed the ventral fins when they changed the flaps to the -300C standard, but does anybody know in which year this occurred? For example, l/n 333 was delivered as D-ABOS in 1962 with the fin, and was re-registered as D-ABOV a few years later. By the 1970s, the fin was gone. I'm building a model in the 1960s straight-cheatline scheme, and would like to make sure I get the fin/no-fin right.
skipness1E From United Kingdom, joined Aug 2007, 3514 posts, RR: 2
Reply 6, posted (2 years 12 months ago) and read 4480 times:
Sorry, pedant hat on again. The B707 series is 320B and 320C, not 300B/C.
Pan Am, the launch customer got 321s, 322s for United, 323 for American, 324 for Continental etc etc. Hence 707 series is B707-120, B707-020 better known as the B720 and the B707-320.
Viscount724 From Switzerland, joined Oct 2006, 27377 posts, RR: 22
Reply 7, posted (2 years 11 months 4 weeks 1 day 23 hours ago) and read 4370 times:
Quoting ADent (Reply 4): You can see the small fin on the 707-230 photo from the 1961 and lot of 707-430 photos with the big fin - which kept it until at least 1977.
The first photo is a 720B (720-030B), not a 707-230. All 720s and 720Bs were built with the fairly narrow ventral fin.
The 707-420 series (R-R-Conways) kept the ventral fin permanently as far as I know. No 707-320Cs had the ventral fin and later production -320Bs had the ventral fin deleted as it wasn't needed due to changes to the wing, flaps, slats etc.