Also, the MU2 uses spoilers for roll control, they could
have been frozen down in the flush position by the rain.
Freezing rain is the worst and as was said, taking off with
an unknown amount of ice on all surfaces, unbalanced
controls, frozen tabs, ice covered static ports is just
plain foolish. But I guess the crew had a schedule to keep.
Freezing rain is bad enough in flight even with a full
certified de-icing system, but on the ground the rain will
cover the whole airframe and if the anti-ice systems do
work, they will only remove ice from leading edges and
engine inlets and the props. There would remain a ridge of
ice just behind the leading edges, acting as a spoiler.
--
James H. Macklin
ATP,CFI,A&P
--
Merry Christmas
Have a Safe and Happy New Year
Live Long and Prosper
Jim Macklin
"Garner Miller" wrote in message
...
| In article TaBqf.169597$Gd6.80548@pd7tw3no, Gary
| wrote:
|
| ...there was freezing rain at the time of accident...
|
| "We know that Navair pilots are tasked with own
de-icing," Bill
| Yearwood, an investigator with [the TSB]... they would
not line up with
| other aircraft for de-icing. They would do it
themselves."
|
| In this case I feel that this crash may have more to do
with the weather and
| possibly the crews haste to get into the air.
|
| I don't read it that way. I read it that the crew deiced
themselves
| properly, but it took some time to get back in the plane,
get it
| started up, run the checklists, and get to the runway --
more time than
| the deicing fluid was effective.
|
| I'm not sure what the intensity of the freezing rain was
in the above
| accident. At my company, we're prohibited from taking off
with
| freezing rain other than "light." And with even light
FZRA, Type I
| fluid (the heated stuff) only gets us 2-5 minutes of
protection. And
| if they even had Type IV (cold gel) available, that might
only provide
| 5-10 minutes of protection, depending on the air
temperature and the
| mix ratio.
|
| I'd bet the fluid became ineffective on the way to the
runway, and with
| the high wing, they couldn't see it.
|
| Sad.
|
| --
| Garner R. Miller
| ATP/CFII/MEI
| Clifton Park, NY =USA=
|
http://www.garnermiller.com/