Max gross weight

How do aircraft manufactures determine the maximum gross weight for a
given plane? I know I've come across articles that mention on a cool day
you can go over the max. gross weight by a percentage, I think 20% was
thrown out there but not sure. Then again, on a hot day you might not
get any where near that. Is it determined by a standard temp?

In article ,
Chris wrote:
How do aircraft manufactures determine the maximum gross weight for a
given plane?

The prototype is fitted with a water bladder and is flown in formation
with a tanker. The bladder is slowly filled with water until the plane
drops out of the sky. A gauge in the tanker indicates the max gross
weight of the new design.

--
Ben Jackson

http://www.ben.com/

ROFLMFAO

very funny indeed
BT

"Ben Jackson" wrote in message
news:8xq6d.171917$3l3.101172@attbi_s03...
In article ,
Chris wrote:
How do aircraft manufactures determine the maximum gross weight for a
given plane?

The prototype is fitted with a water bladder and is flown in formation
with a tanker. The bladder is slowly filled with water until the plane
drops out of the sky. A gauge in the tanker indicates the max gross
weight of the new design.

--
Ben Jackson

http://www.ben.com/

"Chris" wrote in message
...
I know I've come across articles that mention on a cool day
you can go over the max. gross weight by a percentage, I think 20% was
thrown out there but not sure.

You should NEVER go over max GW.. that is a limit, not a buffer zone.

The aircraft may be able to support the extra weight on a smooth day.. but
not in turbulence, and when the accident investigation computes your actual
GW and finds a "causal factor in the accident is exceeding the Max GW
allowed".. your insurance company may find your policy invalid.

BT

"your insurance company may find your policy invalid"

bull

"BTIZ" wrote in message
news:uYq6d.114$mS1.39@fed1read05...

"Chris" wrote in message
...
I know I've come across articles that mention on a cool day
you can go over the max. gross weight by a percentage, I think 20% was
thrown out there but not sure.

You should NEVER go over max GW.. that is a limit, not a buffer zone.

The aircraft may be able to support the extra weight on a smooth day.. but
not in turbulence, and when the accident investigation computes your
actual
GW and finds a "causal factor in the accident is exceeding the Max GW
allowed".. your insurance company may find your policy invalid.

BT

Chris wrote:
How do aircraft manufactures determine the maximum gross weight for a
given plane? I know I've come across articles that mention on a cool
day you can go over the max. gross weight by a percentage, I think
20% was thrown out there but not sure. Then again, on a hot day you
might not get any where near that. Is it determined by a standard
temp?

Which articles suggest it is OK to fly a plane over gross?

Isn't there a 15% tolerance allowed for certain types of flights in Alaska?

--
Jim Carter
"BTIZ" wrote in message
news:uYq6d.114$mS1.39@fed1read05...

"Chris" wrote in message
...
I know I've come across articles that mention on a cool day
you can go over the max. gross weight by a percentage, I think 20% was
thrown out there but not sure.

You should NEVER go over max GW.. that is a limit, not a buffer zone.

The aircraft may be able to support the extra weight on a smooth day.. but
not in turbulence, and when the accident investigation computes your
actual
GW and finds a "causal factor in the accident is exceeding the Max GW
allowed".. your insurance company may find your policy invalid.

BT

"Ben Jackson"
The prototype is fitted with a water bladder and is flown in formation
with a tanker. The bladder is slowly filled with water until the plane
drops out of the sky. A gauge in the tanker indicates the max gross
weight of the new design.


How would you like to be the lucky pilot during "water test" ...#2?

http://www.theknownuniverse.com/comet.htm
(bottom half of the piece)

The Ministry of Civil Aviation decided upon a unique test to find out. They
built a tank large enough to hold one of the grounded Comets. The wings
protruded from water-tight slots in the sides of the tank. Then the tank and
cabin were flooded with water. The water pressure inside the cabin would be
raised to eight and a quarter pounds per square inch to simulate the
pressure encountered by a Comet at 35,000 feet. It would be held there for
three minutes and then lowered while the wings were moved up and down by
hydraulic jacks. The hydraulic jacks would simulate the flexing that
naturally occurs in aircraft wings during flight. This process continued
non-stop, 24 hours a day.


Montblack

"BTIZ" wrote in message
news:uYq6d.114$mS1.39@fed1read05...

"Chris" wrote in message
...
I know I've come across articles that mention on a cool day
you can go over the max. gross weight by a percentage, I think 20% was
thrown out there but not sure.

You should NEVER go over max GW.. that is a limit, not a buffer zone.

Don't ever tell that to the ferry pilots.

"Chris" wrote in message
...
How do aircraft manufactures determine the maximum gross weight for a
given plane? I know I've come across articles that mention on a cool day
you can go over the max. gross weight by a percentage, I think 20% was
thrown out there but not sure. Then again, on a hot day you might not get
any where near that. Is it determined by a standard temp?

The manufacturers consider a number of factors. What can the structure
handle (don't forget the landing gear)? What weight gives decent takeoff
and climb performance on a hot day at a high altitude airport? What weight
gives the FAA mandated stall speed? Any of these issues (and more) can be
the limiting factor.

KB