zero fuel w & b

"tom" wrote in message
oups.com...
I fly a homebuilt Savannah (there are quite a few flying in Oz) and if
the pilot weighs less than about 120 pounds, and the fuel is nearly
exhausted, the CG is just slightly forward of the envelop.
tom

Tom, do you carry some ballast to correct this? I know nobody plans to run
out of fuel but if it happened , say from a fuel leak, I would hate to be
worrying about an off field landing with a forward cg.
terry




d&tm wrote:
Are there any single engine airplanes out there that really can go
outside
the envelope by burning fuel?
Terry
PPL downunder

I weigh 170, so the only ballast I carry is around my ass. 8^)
tom

d&tm wrote:
"tom" wrote in message
oups.com...
I fly a homebuilt Savannah (there are quite a few flying in Oz) and if
the pilot weighs less than about 120 pounds, and the fuel is nearly
exhausted, the CG is just slightly forward of the envelop.
tom

Tom, do you carry some ballast to correct this? I know nobody plans to run
out of fuel but if it happened , say from a fuel leak, I would hate to be
worrying about an off field landing with a forward cg.
terry

"tom" wrote in message
oups.com...
I weigh 170, so the only ballast I carry is around my ass. 8^)
tom

"Does this airplane make me look fat...?"

;O)

Jay B

Only when I fly naked.
tom

Jay Beckman wrote:
"tom" wrote in message
oups.com...
I weigh 170, so the only ballast I carry is around my ass. 8^)
tom

"Does this airplane make me look fat...?"

;O)

Jay B

d&tm wrote:

Are there any single engine airplanes out there that really can go outside
the envelope by burning fuel? ( I am only interested in the normal
ategory - not utility). Perhaps the training is just to prepare you for
heavy aircraft?

I believe Bonanzas can have this problem in certain configurations.

It depends on which where the CG is. If you've got an aft CG
and burning fuel drives it more aft, you've got problems.

In my plane, we typically sit on the forward CG limit with
the tanks full. Since the envelope is sloped on the forward
CG side (the limit moves aft as you go up in gross weight),
even as the CG moves forward with fuel burn, you're also
getting lighter so the CG limit is moving forward faster.

"Ron Natalie" wrote in message
...
d&tm wrote:

Are there any single engine airplanes out there that really can go
outside
the envelope by burning fuel? ( I am only interested in the normal
ategory - not utility). Perhaps the training is just to prepare you
for
heavy aircraft?

I believe Bonanzas can have this problem in certain configurations.

It depends on which where the CG is. If you've got an aft CG
and burning fuel drives it more aft, you've got problems.

In my plane, we typically sit on the forward CG limit with
the tanks full. Since the envelope is sloped on the forward
CG side (the limit moves aft as you go up in gross weight),
even as the CG moves forward with fuel burn, you're also
getting lighter so the CG limit is moving forward faster.

Similar to the Warrior. but you can barely get enough wt in the front to
reach the forward limit. expecially when I am one of them ( 180 lbs). But
it is just possible with a couple of sumu wrestlers and less than full fuel
to exceed the forward limit, in this case burning fuel actually brings you
back in bacause as you say the cg moves forward but the limit moves forward
faster at lower wt.
What is your plane John?
terry
PPL downuder

d&tm wrote:

Are there any single engine airplanes out there that really can go outside
the envelope by burning fuel?

The Bonanza is the big example that comes to mind.

The moment of the Fuel is forward of the main spar and as you burn your
fuel off, the CG moves aft.

If you have the 5th and 6th seats filled or have lots of aft baggage,
you can end up aft of limits, which can bite when you are low/slow on
approach.

Dave