Near Miss at DIA today

[Louis L. Perley III]

Airbus A-319 comes to within 50 feet of a Metroliner (Metroliner was on
the runway and the Airbus was landing)

http://www.denverpost.com/ci_4957824

Question, what is the spin up time on a large airliner like that doing
a go around? I know it takes a bit for the engines to spin up and
develop take-off power. I know the weather out here this morning wasn't
so hot with all the snow blowing around.

--
Louis Perley
N370

[Bob Gardner]

My big iron experience is limited to the 737 simulator some time ago, but as
I recall, the SOP was to bring the power up to a predetermined setting while
on short final, unlike a piston plane in which power is reduced as you near
the surface. The idea, of course, was to shorten the spin-up time you
mention.

Bob Gardner

"Louis L. Perley III" > wrote in message
ps.com...
> Airbus A-319 comes to within 50 feet of a Metroliner (Metroliner was on
> the runway and the Airbus was landing)
>
> http://www.denverpost.com/ci_4957824
>
> Question, what is the spin up time on a large airliner like that doing
> a go around? I know it takes a bit for the engines to spin up and
> develop take-off power. I know the weather out here this morning wasn't
> so hot with all the snow blowing around.
>
> --
> Louis Perley
> N370
>

[Peter Dohm]

> > Airbus A-319 comes to within 50 feet of a Metroliner (Metroliner was on
> > the runway and the Airbus was landing)
> >
> > http://www.denverpost.com/ci_4957824
> >
> > Question, what is the spin up time on a large airliner like that doing
> > a go around? I know it takes a bit for the engines to spin up and
> > develop take-off power. I know the weather out here this morning wasn't
> > so hot with all the snow blowing around.
> >
>
> My big iron experience is limited to the 737 simulator some time ago, but
as
> I recall, the SOP was to bring the power up to a predetermined setting
while
> on short final, unlike a piston plane in which power is reduced as you
near
> the surface. The idea, of course, was to shorten the spin-up time you
> mention.
>
My big iron experience is even more limited, to the seats in back except for
a few minutes in a sim long ago, but the pilots on every flight that I
recall riding on have increased power on short final. I presumed that
reduced spool-up time was a lot of the reason.

The physics of the situation, and my experience in basic trainers, suggests
that the closest proximity should occur some time after the command for full
power--and quite possibly after the spool-up is complete and the paths are
already diverging.

[RST Engineering]

Spool up time on the JT8D (727, 737, etc) is 8 seconds or less from some
minimum EPR to some maximum EPR but quite frankly I had those numbers
memorized from forty years ago.

Jim


"Bob Gardner" > wrote in message
. ..
> My big iron experience is limited to the 737 simulator

[Capt.Doug]

>"RST Engineering" wrote in message
> Spool up time on the JT8D (727, 737, etc) is 8 seconds or less from some
> minimum EPR to some maximum EPR but quite frankly I had those numbers
> memorized from forty years ago.

The A-319 has either CFM-56s or IAE2500s, both of which go from idle to max
power in 3 seconds, and less time from flight idle. During a routine
go-around, approach thrust to MCT, power is available with little
discernable lag.

D.