happy-flier From Canada, joined Dec 1999, 298 posts, RR: 0 Posted (1 year 2 months 5 days 8 hours ago) and read 1483 times:
A very interesting photo here, from Douglas, of a "Short Eight" - but with nacelles unlike any production nacelles that were ever seen in other series -50 DC-8s. In fact, the Super -62/-63 had nacelles that were visibly different still, despite having all the bypass ducted along their entire length.
Viscount724 From Switzerland, joined Oct 2006, 21488 posts, RR: 24 Reply 1, posted (1 year 2 months 5 days 7 hours ago) and read 1441 times:
Quoting happy-flier (Thread starter): Anyone know what the history of these nacelles here was, and why they never went into wide use in the series -50s?
All the references I can find say that aircraft was used as a testbed to develop the new engine nacelles for the -62/-63.
I would guess that since the -50 series wasn't being ordered in large numbers by then, there wasn't any point in spending a lot of money to certify new engine nacelles for the -50 series since they would only be ready for production about the time the last -50s were being delivered..