I learned an interesting point while talking with the owner and pilot of
one of the local King Air 90s. His airplane has been retrofitted with
larger versions of the PT-6. But, the airplane is certified at the
original horsepower level. Hence, he can't just push the power levers
forward and go. The airplane can't use the additional capability until
he passes through the altitude where it needs full power settings in
order to achieve the original certified power. From there on up, it
gives him an advantage.
Of course, I suspect that if he suffered loss of power on takeoff, he
would probably ignore the design limit and put his faith in the built-in
factor of safety.
Jim Nichols
Tullahoma, TN USA
On 9/27/2019 7:57 PM, Ken Norton wrote:
I think Alaska is about the only place they still live on. But they are ideal
for a lot of Alaskan routes. The Metro is a weird frankenstein combination of
new parts and old ones from scrapped King Airs. Not the most uncomfortable to
fly on, but certainly number 2. With the larger versions of the PT6 you
wouldn't have been bumped. But they didn't make them in time.
The Metros used the Garretts. But sadly, the Dash 10 versions have
only been recent additions. However, they are derated so there really
is no additional power available at take-off. An engine out past V1 is
a hair-raising situation.
AG Schnozz
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