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Federico
Federico
07:55
@TomMcW look at it this way. the trailing edge is an arrow that tells air "please go this way"
if "this way" is different from "that way" where the air comes from, you have lift (positive or negative depending if the difference points up or down)
Federico
Federico
08:50
@Dan you got a second?
Dan Hulme
Dan Hulme
go ahead
Federico
Federico
on this question: aviation.stackexchange.com/q/54452/1467
I was thinking about posting this answer:
> "first production aircraft" indicates the first aircraft built as part of the "production" run (as opposed to the ones built for the test phase, that are not part of the "production").

"under the type certificate" indicate that the type of aircraft has achieved certification and can be legally flown in the Philippines.

All together it identifies the first production built aircraft of a certain type after the certification was provided (in this case for the Philippines).
do you think it is at least acceptable?
Dan Hulme
Dan Hulme
Yes, why not? It's hard to see how the OP is confused.
Federico
Federico
ok, thanks. just a sanity check
Dan Hulme
Dan Hulme
09:02
There's a strong chance you'll get a comment on your answer from the OP, complaining that your answer is stupid, and that's how you'll find out they were confused about something else entirely :-)
Federico
Federico
XD
lpydawa
lpydawa
@Federico so are ask these Stack sites created by Stack Exchange or by people of the internet?
In so sorry if I'm asking too many questions
Federico
Federico
@lpydawa SE site are part of the SE network, created by SE the company.
how they decide which site to create, is by using Area51, where communities form around possible future SE sites
lpydawa
lpydawa
Ic
Are there separate mods for different sites?
Dan Hulme
Dan Hulme
yes
each site's community elects the moderators for that site
lpydawa
lpydawa
09:17
How does SE earn money? I dont remember seeing an ad on SE
ratchet freak
ratchet freak
@lpydawa there are ads for low rep users
lpydawa
lpydawa
I see, by low rep, how many reps?
Im a 150 rep for Aviation SE, is that considered low rep?
ratchet freak
ratchet freak
the bar for reducing ads is pretty low IIRC
lpydawa
lpydawa
Ok, I see
Federico
Federico
10:12
weeeee, new Oldtimer Hahnweide announced!
user image
 
7 hours later…
TomMcW
TomMcW
17:02
@Federico That's how NASA should explain it!
Flow turning actually seems pretty easy to understand. Although the word "turning" can be a little confusing if you consider still air/moving wing. I was just questioning that professor's explanation that seems to imply that it needs to be an airfoil shape to create lift. Lots of things create lift that don't have an airfoil shape.
Federico
Federico
17:18
airfoil shapes help (with drag, with extra lift, with less separation at higher AoAs), but they are not required, that's right

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