Guest

"Slots" On The DC-8

Sun May 18, 2003 12:08 am

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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JETPILOT
Posts: 3094
Joined: Tue May 18, 1999 6:40 am

RE: "Slots" On The DC-8

Sun May 18, 2003 11:45 am

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

 
Cessnapimp
Posts: 1245
Joined: Sun Oct 07, 2001 11:46 am

RE: "Slots" On The DC-8

Sun May 18, 2003 2:49 pm

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...
 
Guest

RE: "Slots" On The DC-8

Sun May 18, 2003 5:13 pm

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 .
 
 
Guest

RE: "Slots" On The DC-8

Sun May 18, 2003 7:09 pm

All models of DC8s 10 to 70s have slots...
(s) Skipper
 
timz
Posts: 6084
Joined: Fri Sep 17, 1999 7:43 am

Clarification

Mon May 19, 2003 3:40 am

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

RE: "Slots" On The DC-8

Mon May 19, 2003 7:01 pm

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
 
Airplanedude
Posts: 15
Joined: Wed Apr 16, 2003 4:43 pm

RE: "Slots" On The DC-8

Tue May 20, 2003 4:38 pm


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

 Smile/happy/getting dizzy

Thanks

Airplanedude
 
JETPILOT
Posts: 3094
Joined: Tue May 18, 1999 6:40 am

RE: "Slots" On The DC-8

Wed May 21, 2003 10:56 am

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

JET
 
Airplanedude
Posts: 15
Joined: Wed Apr 16, 2003 4:43 pm

RE: "Slots" On The DC-8

Fri May 23, 2003 7:54 pm

Hi Jetpilot:
Please send them to

airplanedude@hotmail.com

Thanks a lot,

Airplanedude

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