Can anyone plese tell me what is the correct name of these flap-support/hinge whotzits?ThanksDave

Hello DaveI think they are called boggies ?? not sure how the spelling is either, sorry .http://homepages.ihug.com.au/~elche/Genera...a_fl_md_wht.gif http://homepages.ihug.com.au/~elche/Genera...a_fl_md_wht.gifDiego CoslovichWebsite: http://homepages.ihug.com.au/~elche/index.htm (under construction)E-mail: [email protected]

Those would be flap guides. Bogies (not boggies, and not bogeys or boogies either) are assemblies with several wheels attached (e.g. the four-wheel bogies on the main gear of an A330 or the four-wheel bogies on either end of most railway cars). Misha

I believe you are both correct - Misha and Elche.The Flaps are normally mounted in Flap Guide tracks and move down the tracks on small sets of wheels( bogies).Dave(" not so old" as opposed to Old-Dave)

I honestly don't know, but I have read in several aircraft descriptions (specially the posky 747s) which say "tilting bogies". I've always assumed they were talking about what we are talking about here :(http://homepages.ihug.com.au/~elche/Genera...a_fl_md_wht.gif http://homepages.ihug.com.au/~elche/Genera...a_fl_md_wht.gifDiego CoslovichWebsite: http://homepages.ihug.com.au/~elche/index.htm (under construction)E-mail: [email protected]

The tilting bogie is refering to the landing gear that tilt - makes it easier to land with tilted landing gear.This a.net pic shows the tilting bogies really well. http://www.airliners.net/open.file/593271/L

geez.... and all this time i've been thinking they were talking bout something else!! I guess you learn something new every day :-roll http://homepages.ihug.com.au/~elche/Genera...a_fl_md_wht.gif http://homepages.ihug.com.au/~elche/Genera...a_fl_md_wht.gifDiego CoslovichWebsite: http://homepages.ihug.com.au/~elche/index.htm (under construction)E-mail: [email protected]

And I believe the streamline fairings are also known as canoes, after the boat.Mike F.

I've always heard canoes too...

Thank you Misha and "Young-Dave" (There are too many Daves here :-) )So as far as I understand from your replies, the answer is that: They are flap guides which run on bogie wheels.Does anyone have a link to an article explining the mechanics of how they actually work? Or perhaps some kind soul could hazard an off-the-cuff explanation right here?GreetingsDave

Nope, no "bogey wheels", that's for the undercarriage only - flaps on larger aircraft, such as the 737, usually run to their desired position on track guides, and are extended and retracted using hydraulic or electric screw-jacks, which are part of the flap actuator system. Sorry, couldn't find a diagram for you!Mike F.

The technical term (or as technical as it gets) would be flap track fairing for aircraft that use the tracks, or flap actuator fairing for those airframes that utilize screwjacks or any other type of actuator. The common slang in the industry is "canoe" due to thier shape.The canoes are there only to cover the mechanics of the flap system for aerodynamic purposes. Under the canoes will be either a flap track or an actuator. The tracks are just that, either a track or a slot that rollers attatched to the flap ride along when the flaps are in motion. In the case of a mechanical or hydraulic actuator, well....thats what is under the canoe.

If you can borrow or get hold of a copy of Airframe Structural Design, by Michael C Y Niu (I think that`s his name), it has a whole chapter devoted to high-lift devices and their construction.CheersLungs

Thankyou Mike, Tinman & LungsNow it's getting a bit clearerDave