"mbrookesn231" wrote in
le.rogers.com:

That makes no sense, according to that theory the wheel should lower the
amount of lift, seeing as the lower part of the wheel is going in the
direction of the air.


nope, he's right,

It's the greater speed of the upper part of the wheel that would increase
it but it's insignificant in any case.


Bertie



"Bertie the Bunyip" wrote in message
...
"JaxAshby" wrote in
news
Aircraft get greater lift just after takeoff if they leave their
landing gear down. That's because the tires are still rotating from
takeoff and they provide lift in the airstream via the Magnus effect.
Betcha ole Bertie didn't know that.


Betcha old Bertie has forgotten more about airplanes than you'll ever
know,
fjuckwit.

Bertei

Bertie the Bunyip wrote in message . ..
"mbrookesn231" wrote in
le.rogers.com:

That makes no sense, according to that theory the wheel should lower the
amount of lift, seeing as the lower part of the wheel is going in the
direction of the air.


nope, he's right,

It's the greater speed of the upper part of the wheel that would increase
it but it's insignificant in any case.


Bertie


the amount of theoretical lift generated is negligible, whereas the
drag generated from extended gear is not

(running with scissors) wrote
in om:

Bertie the Bunyip wrote in message
. ..
"mbrookesn231" wrote in
le.rogers.com:

That makes no sense, according to that theory the wheel should
lower the amount of lift, seeing as the lower part of the wheel is
going in the direction of the air.


nope, he's right,

It's the greater speed of the upper part of the wheel that would
increase it but it's insignificant in any case.


Bertie


the amount of theoretical lift generated is negligible, whereas the
drag generated from extended gear is not


Well, exactly. though on some aircraft the drag caused during retraction is
considered worse than leaving it down in the event of an engine failure!


Bertie

Bertie the Bunyip wrote in message . ..
(running with scissors) wrote
in om:

Bertie the Bunyip wrote in message
. ..
"mbrookesn231" wrote in
le.rogers.com:

That makes no sense, according to that theory the wheel should
lower the amount of lift, seeing as the lower part of the wheel is
going in the direction of the air.


nope, he's right,

It's the greater speed of the upper part of the wheel that would
increase it but it's insignificant in any case.


Bertie


the amount of theoretical lift generated is negligible, whereas the
drag generated from extended gear is not


Well, exactly. though on some aircraft the drag caused during retraction is
considered worse than leaving it down in the event of an engine failure!


Bertie

true.

(running with scissors) wrote
in om:

Bertie the Bunyip wrote in message
. ..
(running with scissors)
wrote in om:

Bertie the Bunyip wrote in message
. ..
"mbrookesn231" wrote in
le.rogers.com:

That makes no sense, according to that theory the wheel should
lower the amount of lift, seeing as the lower part of the wheel
is going in the direction of the air.


nope, he's right,

It's the greater speed of the upper part of the wheel that would
increase it but it's insignificant in any case.


Bertie


the amount of theoretical lift generated is negligible, whereas the
drag generated from extended gear is not


Well, exactly. though on some aircraft the drag caused during
retraction is considered worse than leaving it down in the event of
an engine failure!


Bertie

true.


Can't think of one off the top of my head, though!

Bertie

"Bertie the Bunyip" wrote in message
ws.com...
(running with scissors) wrote
in om:

Bertie the Bunyip wrote in message
. ..
(running with scissors)
wrote in om:

Bertie the Bunyip wrote in message
. ..
"mbrookesn231" wrote in
le.rogers.com:

That makes no sense, according to that theory the wheel should
lower the amount of lift, seeing as the lower part of the wheel
is going in the direction of the air.


nope, he's right,

It's the greater speed of the upper part of the wheel that would
increase it but it's insignificant in any case.


Bertie


the amount of theoretical lift generated is negligible, whereas the
drag generated from extended gear is not


Well, exactly. though on some aircraft the drag caused during
retraction is considered worse than leaving it down in the event of
an engine failure!


Bertie

true.


Can't think of one off the top of my head, though!

Bertie

Any A/C that the gear rotates 90 degrees to stow would have greater drag
during the "Rotate/Stow" sequence.
Ralph Nesbitt
Professional FD/CFR/ARFF Type

Ralph Nesbitt wrote:

Well, exactly. though on some aircraft the drag caused during
retraction is considered worse than leaving it down in the event of
an engine failure!


Bertie

true.


Can't think of one off the top of my head, though!


Any A/C that the gear rotates 90 degrees to stow would have greater drag
during the "Rotate/Stow" sequence.

Many aircraft have gear doors that open for retraction/extension,
but are closed when the gear is locked in place, either up or down.
In those aircraft, drag will be higher during the extension or
retraction sequence, as an extra door is open and hanging in the
breeze.

Mike

"Ralph Nesbitt" wrote in
:


"Bertie the Bunyip" wrote in message
ws.com...
(running with scissors) wrote
in om:

Bertie the Bunyip wrote in message
. ..
(running with scissors)
wrote in om:

Bertie the Bunyip wrote in message
. ..
"mbrookesn231" wrote in
le.rogers.com:

That makes no sense, according to that theory the wheel should
lower the amount of lift, seeing as the lower part of the wheel
is going in the direction of the air.


nope, he's right,

It's the greater speed of the upper part of the wheel that would
increase it but it's insignificant in any case.


Bertie


the amount of theoretical lift generated is negligible, whereas the
drag generated from extended gear is not


Well, exactly. though on some aircraft the drag caused during
retraction is considered worse than leaving it down in the event of
an engine failure!


Bertie

true.


Can't think of one off the top of my head, though!

Bertie

Any A/C that the gear rotates 90 degrees to stow would have greater drag
during the "Rotate/Stow" sequence.
Ralph Nesbitt

Well, I ws thinking more of ther gear doors opeing and closing during the
sequence.


Bertie