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"Slots" On The DC-8  
User currently offlineMASB747 From , joined Dec 1969, posts, RR:
Posted (10 years 11 months 2 weeks 12 hours ago) and read 4169 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 ?


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Photo © Art Brett
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Photo © Keith Kinman



10 replies: All unread, jump to last
 
User currently offlineJETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 1, posted (10 years 11 months 2 weeks 1 hour ago) and read 4074 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.

JET



User currently offlineCessnapimp From Canada, joined Oct 2001, 1320 posts, RR: 20
Reply 2, posted (10 years 11 months 1 week 6 days 22 hours ago) and read 4049 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.

Best detail shot I could find over the net:



Very interesting stuff...


User currently offlineMASB747 From , joined Dec 1969, posts, RR:
Reply 3, posted (10 years 11 months 1 week 6 days 19 hours ago) and read 4034 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 .


User currently offlineMASB747 From , joined Dec 1969, posts, RR:
Reply 4, posted (10 years 11 months 1 week 6 days 19 hours ago) and read 4027 times:

AAh d  Pissed n Yahoo !! Here´s the link
http://uk.photos.yahoo.com/bc/mark_ings/lst?.dir=/My+Photos/aviation&.src=ph&.order=&.view=t&.done=http%3a//photos.yahoo.com/


User currently offlineB747Skipper From , joined Dec 1969, posts, RR:
Reply 5, posted (10 years 11 months 1 week 6 days 17 hours ago) and read 4001 times:

All models of DC8s 10 to 70s have slots...
(s) Skipper


User currently offlineTimz From United States of America, joined Sep 1999, 6712 posts, RR: 7
Reply 6, posted (10 years 11 months 1 week 6 days 9 hours ago) and read 3953 times:

As I recall the original DC-8-11 didn't have slots (the -12 did)-- but they were all converted sooner or later?

User currently offlineB747skipper From , joined Dec 1969, posts, RR:
Reply 7, posted (10 years 11 months 1 week 5 days 18 hours ago) and read 3898 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


User currently offlineAirplanedude From Germany, joined Apr 2003, 15 posts, RR: 0
Reply 8, posted (10 years 11 months 1 week 4 days 20 hours ago) and read 3777 times:


@JET:
Would be nice if you could post that pic somewhere.........

 Smile/happy/getting dizzy

Thanks

Airplanedude


User currently offlineJETPILOT From United States of America, joined May 1999, 3130 posts, RR: 29
Reply 9, posted (10 years 11 months 1 week 4 days 2 hours ago) and read 3717 times:

Picture hosting won't work. Post an e-mail, and I will get them to you.

JET


User currently offlineAirplanedude From Germany, joined Apr 2003, 15 posts, RR: 0
Reply 10, posted (10 years 11 months 1 week 1 day 17 hours ago) and read 3597 times:

Hi Jetpilot:
Please send them to

airplanedude@hotmail.com

Thanks a lot,

Airplanedude


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