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Author Topic: Tech differences on Grandma (DC9)  (Read 1189 times)
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Pilot101
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« on: 03 May 2005 at 13:54 »

I am looking for some info on Grandma.
 Can anyone help me with technical differences between the DC9-15 and the DC9-32.
Many thanks.
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bafanguy
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« Reply #1 on: 03 May 2005 at 22:07 »

101,

Didn't fly the -15 but my old Eastern Airlines manual ( circa 1968 ) has a few of the differences listed:

No slats ( and has different flap settings )

no fwd aux fuel tank, just L, R, CTR

Hydraulic brake selector has only L or R, no BOTH position.

No aux rudder limiter

No "Stall Indication Failure" annunciator light

APU air system didn't have the " Air Cond Colder" switch position

Stall warning test is different ( apparently, don't get the red stall lights on glareshield or aural warning in Test)

Different electric trim rates

Different model of the JT8D engine.

That's all the differences that jumped out at me as I glanced through the systems.  Hope it helps...I know it's not much info.

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"Damn these human beings; if I had invented them I would go hide my head in a bag."
Mark Twain
DC-9-81
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« Reply #2 on: 09 May 2005 at 08:23 »

the 15 is shorter....
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FLARE RETARD!!
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« Reply #3 on: 06 June 2005 at 04:19 »

And much more fun to fly!! Grin

At TWA we had 4 DC9-15's and I always looked forward to flying them.  Because it was lacking slats the landing attitude was much flatter than a -30 (more like a turboprop) and speed control was essential, right on bug, no more, no less.  According to the Ozark guys the best landings were made just as the stick shaker activated.

One day an old Ozark Captain asked me if I'd ever seen an "Ozark Assault Landing" demonstrated.  I said no and we landed in Des Moines, Iowa with the thrust reversers deployed (in flight) over the appoach end of the runway.  It was the smoothest landing I'd seen in the -15.  He explained that on their FAA type rides at Ozark they were required to demonstrate that technique in case they were landing on an icy runway.  (I don't think he was lying, he was a check Captain.)  "Ozark Speed Brakes" was dropping the gear with the hydraulic pumps still in low, that way the nose gear wouldn't extend and disturb our cockpit conversations, ala' F27. Huh

Our -15's had JT8D-7 engines in them and they flew like little fighter jets.  I heard that someone in Mexico was flying -15's with -15 engines in them!  That would've been a handful.

The -30's were the best handling DC-9's I flew, but the DC-9-15's were the most fun to fly, almost as hard to land as the -50's but much more responsive in roll.  (The -15's were a bit unstable in yaw, but not as bad as a F28.)

Dave  Grin Grin

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