MASB747 From , joined Dec 1969, posts, RR: Posted (10 years 3 days 21 hours ago) and read 3546 times:
It´s known that the 8´s aren´t fitted with the classical slats extending from the leading edge but they do have quite a unique kind of wing-lift-devices - it´s called the "slots" and tey are kinda like slats that are built into the wing rather than extending out of it (the white squares visible on the left pic represent these slots in their ´up- position as I couldn´t find a pic which shows them open in the db).Now something just escapes me as for how they are working and affecting the airflow.And how are they activated ? Is there another aircraft that has a similiar design or is this a unique feature of the DC-8 ?
JETPILOT From United States of America, joined May 1999, 3130 posts, RR: 32 Reply 1, posted (10 years 3 days 9 hours ago) and read 3451 times:
The slots o nthe DC8 open when the flpas are extended. They are not high lift devices. They are designed to clean up airflow around the engine pylon.
The slot doors are the upper, and lower wing skins. The bottom slot door moves up, and the upper slot door moves down. The 2 doors come together to create a new wing leading edge and the slot is open.
I have a pic here I can scan for you... let me see if I can host it on Webshots.
Cessnapimp From Canada, joined Oct 2001, 1320 posts, RR: 23 Reply 2, posted (10 years 3 days 6 hours ago) and read 3426 times:
I believe the first to come up with those embedded wing slots were the messerchmitt team on the Me-163 Komet; the first (and thankfully last) rocket propelled fighter plane.
MASB747 From , joined Dec 1969, posts, RR: Reply 3, posted (10 years 3 days 4 hours ago) and read 3411 times:
I have only one picture of the stuff in my whole (quite impressive ) book collection,sorry for the bad quality.
Taken from "Verkehrsflugzeuge" (Hallwag) by Alfred Muser ,retired Swissair-Captain who flew DC-8s,Coronados,DC-10s ,747s and others.
The picture actually shows a DC-8-62 - wing with these famous slots open.Don't know if the earlier -10/20/30/40/50s are equipped with these slots but I think they are .
B747skipper From , joined Dec 1969, posts, RR: Reply 7, posted (10 years 2 days 2 hours ago) and read 3275 times:
I flew the DC8-60 and 70 series mostly, also 50s but not often... I remember some old 50s I flew were actually converted 20 or 30s with fan JT3D engines, but all had "slots"... in case these "did not open" for takeoff, it was a "no go" item... for landing, if they failed to open, you had to add an extra 10 (or 15?) knots faster to compensate for the loss of lift... dont remember - sorry...
xxx
Let's try to find a Diesel-8 expert here... dont remember much about the aircraft... was quite different from the Boeings in design !!!
xxx
Happy contrails
(s) Skipper
Sponsor Message: 
From , joined Dec 1969, posts, 
From United States of America, joined May 1999, 3130 posts, 
From Canada, joined Oct 2001, 1320 posts, 
n Yahoo !! Here´s the link
From Germany, joined Apr 2003, 15 posts, 
Sponsor Message: 
Printer friendly format
