Weight of Ice

I roughly calculated that the weight of 1 in. of ice on all forward
surfaces on my T182 (fixed gear) is about 250 lbs. Anyone cares to
comment on this?
Gerd (ATPL)

I roughly calculated that the weight of 1 in. of ice on all forward
surfaces on my T182 (fixed gear) is about 250 lbs. Anyone cares to
comment on this?

Just that the change in shape of the airfoil is probably more important
than the weight.

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
for Email, make the obvious change in the address.

Just that the change in shape of the airfoil is probably more important
than the weight.

That is correct, but at some time, the weight itself becomes an issue,
too. I was just curious about the weight. There are some interesting
pictures here comparing a Cessna wing with a TKS equipped Cirrus wing:
http://www.ferryflights.org/Ferryflights-icing.htm

Gerd

You are long past dead when the weight becomes an issue.
At least in a little plane. The shape of the ice buildup can
be really ugly.

Worse problems: Shape of the wing drag
Tail plane stalling in landing
configuration.

Airplanes with the spar in the front seat tend to carry ice
better-- the ugly shape interferes less with the wing lift.

Trust me on this. Bill Hale BPPP instructor

gwengler wrote:
Just that the change in shape of the airfoil is probably more important
than the weight.

That is correct, but at some time, the weight itself becomes an issue,
too. I was just curious about the weight. There are some interesting
pictures here comparing a Cessna wing with a TKS equipped Cirrus wing:
http://www.ferryflights.org/Ferryflights-icing.htm

Gerd

It isn't the weight, it is the lack of aerodynamic shape.




--
James H. Macklin
ATP,CFI,A&P

"gwengler" wrote in message
oups.com...
|I roughly calculated that the weight of 1 in. of ice on all
forward
| surfaces on my T182 (fixed gear) is about 250 lbs. Anyone
cares to
| comment on this?
| Gerd (ATPL)
|

Another swing at a dead horse...weight is a minor factor. If you could carry
another passenger, you could carry as much weight in the form of ice as in
your worst nightmares.

Bob Gardner

"gwengler" wrote in message
oups.com...
I roughly calculated that the weight of 1 in. of ice on all forward
surfaces on my T182 (fixed gear) is about 250 lbs. Anyone cares to
comment on this?
Gerd (ATPL)

Bob Gardner wrote:
Another swing at a dead horse...weight is a minor factor. If you could carry
another passenger, you could carry as much weight in the form of ice as in
your worst nightmares.

I guess I'm not old enough. However, was there really ever a time when
students were taught that its the weight of the ice that kills?

-Robert, CFII

Maybe I'm not old enough either. I can't remember weight as ever having been
a consideration. Those leading edge profiles showing clear, rime, and mixed
have been around since the early 60s to my personal knowledge.

HOWEVER, I have a book from the 1920s that talks about "ice barnacles."

Bob

"Robert M. Gary" wrote in message
ups.com...

Bob Gardner wrote:
Another swing at a dead horse...weight is a minor factor. If you could
carry
another passenger, you could carry as much weight in the form of ice as
in
your worst nightmares.

I guess I'm not old enough. However, was there really ever a time when
students were taught that its the weight of the ice that kills?

-Robert, CFII

Bob Gardner wrote:
Maybe I'm not old enough either. I can't remember weight as ever having been
a consideration. Those leading edge profiles showing clear, rime, and mixed
have been around since the early 60s to my personal knowledge.

HOWEVER, I have a book from the 1920s that talks about "ice barnacles."

Bob

I wondered if perhaps some of the ultra low wing loading of the older
planes (like the J-3) didn't have nearly the aerodynamic effect as a
result of ice as a higher loading wing today does. Essentially, perhaps
today we have a lack of excess lift available?
In my younger days, I flew the J-3 after only doing a 1/2 ass job of
defrosting it. I never noticed any problems. Just thinking out loud.

-Robert

Other problems with the weight of ice that accumulates on
the ground and is not completely removed... I was shown
pictures of a CE 210 [old, strut braced] which crashed near
Tulsa about 30 years ago. It seems that all the ice was
removed except for some small amounts on the ailerons. When
the plane go to cruise speed flutter began and it wrenched
both out wing panels into scrap metal.



"Robert M. Gary" wrote in message
ps.com...
|
| Bob Gardner wrote:
| Maybe I'm not old enough either. I can't remember weight
as ever having been
| a consideration. Those leading edge profiles showing
clear, rime, and mixed
| have been around since the early 60s to my personal
knowledge.
|
| HOWEVER, I have a book from the 1920s that talks about
"ice barnacles."
|
| Bob
|
| I wondered if perhaps some of the ultra low wing loading
of the older
| planes (like the J-3) didn't have nearly the aerodynamic
effect as a
| result of ice as a higher loading wing today does.
Essentially, perhaps
| today we have a lack of excess lift available?
| In my younger days, I flew the J-3 after only doing a 1/2
ass job of
| defrosting it. I never noticed any problems. Just thinking
out loud.
|
| -Robert
|