Moderators: richierich, ua900, PanAm_DC10, hOMSaR
convair880mfan wrote:Also wondering, since I lack aircraft manuals for the type, how the DC-8 flaps worked. Flap hinges? Flap tracks? Looks like those little square things on the flaps have something to do with it. So hard to know what is going on if one lacks the manuals. Thanks for any explanations and insights!
convair880mfan wrote:The nose is rotated and then it just hangs there for a bit before the mains break free
convair880mfan wrote:I have experienced this on the Boeing 727 during takeoff. The nose is rotated and then it just hangs there for a bit before the mains break free with that "thud" sound of fully extended struts. Also noticed this on videos of the DC-8 which almost seems to hover before completely lifting off. Here is a video of that phenomena?
https://youtu.be/WegrN_Y5jVM Is this pilot technique...accelerating in ground effect before increasing pitch? Reducing danger of tail strike?
Also wondering, since I lack aircraft manuals for the type, how the DC-8 flaps worked. Flap hinges? Flap tracks? Looks like those little square things on the flaps have something to do with it. So hard to know what is going on if one lacks the manuals. Thanks for any explanations and insights!
Aaron747 wrote:convair880mfan wrote:I have experienced this on the Boeing 727 during takeoff. The nose is rotated and then it just hangs there for a bit before the mains break free with that "thud" sound of fully extended struts. Also noticed this on videos of the DC-8 which almost seems to hover before completely lifting off. Here is a video of that phenomena?
https://youtu.be/WegrN_Y5jVM Is this pilot technique...accelerating in ground effect before increasing pitch? Reducing danger of tail strike?
Also wondering, since I lack aircraft manuals for the type, how the DC-8 flaps worked. Flap hinges? Flap tracks? Looks like those little square things on the flaps have something to do with it. So hard to know what is going on if one lacks the manuals. Thanks for any explanations and insights!
The DC-8 uses a plain flap design with hinges. Airbus and Boeing usually use Fowler and slotted flap designs.
Aaron747 wrote:The DC-8 uses a plain flap design with hinges. Airbus and Boeing usually use Fowler and slotted flap designs.
DH106 wrote:Aaron747 wrote:The DC-8 uses a plain flap design with hinges. Airbus and Boeing usually use Fowler and slotted flap designs.
I don't think they're quite plain flaps - but similar to the 707 type fowler flap where the actual rearward extention is fairly low compared to modern types which have a large area-increase element to their travel. Because of this, modern airliners generally have a requirement for external tracks covered by 'canoe' flairings, whereas with the 707 & DC-8 the tracks & mechanisms were all able to be accomodated internally in the wing.