Delta DC-9's

[airplane wizard]

Cool...thanks!!

 

[727RedTails]

I do miss flying the DC9 just not the 5 leg days. Very enjoyable plane to fly, of course I have a couple thousand hours 121 in airplanes without autopilot ie Jetstream 32 and BE1900.

Best placard I had in an airplane was in the BE1900C, on the attitude indicator it said "Pull for quick erect" probably would work...

 

[airplane wizard]

If I'm at FL330 and get cross TWINS at 110 and 250 you get this: (6 to 1)
330 - 290 = 4000 .. 4 * 6 = 24 miles. ; (3 to 1) 290 - 110 = 18000 ... 18 * 3 = 54 miles . ; 24 + 54 + 4 (for slow from 300 to 250) - 10 (for avg 50kt headwind for example) equals 72 .... So start descent 72 miles from twins.. (some guys may use 2 to 1 but I think 3 works better for the diamond elite HVC happiness)
Oh .. And do that every few thousand feet on the way down to check progress


Edit: oh and if you are in icing conditions or anticipate it, that changes things too

Thanks...Does icing increase or decrease the distance?

 

[Rough67]

Thanks...Does icing increase or decrease the distance?

Increases the distance. If you have the anti ice going, an increase in thrust (from flight idle) is needed to keep some caution (airfoil ice protect) messages extinguished.. Mabye just add 10 miles and see how it goes on the way down.

 

[GuppyWN]

We don't have any actual ground-speed readout.

If you've got a DME and a clock you just count how many 1/10's of a mile you fly in 36 seconds and add a zero!

Fly it like a -200 baby!

Gup

 

[filejw]

3:1 doesn't work on the -9. To hold pressurization while descending aboving FL290, you can't go to flt idle. Only flt idle below FL290, and then it's 2:1.
I thought the same thing when checking out on it, but 3:1 really doesn't work...on -9.

It worked when they were new..LOL

 

[OPECJet]

Used rule of 3's in the Lear. Amount of altitude to lose, drop the 0's, then multiplied by 3. 33000 to 11000, 22x3 = 66 miles from the fix at a 3000 fpm descent. Rinse and repeat a few times on the way down to verify combined with the TLAR method. Add in 7-10 miles if you have to slow to 250 at the end of the descent.

Would this work in the -9 as well? (thread got my curiosity)

 

[airplane wizard]

Used rule of 3's in the Lear. Amount of altitude to lose, drop the 0's, then multiplied by 3. 33000 to 11000, 22x3 = 66 miles from the fix at a 3000 fpm descent. Rinse and repeat a few times on the way down to verify combined with the TLAR method. Add in 7-10 miles if you have to slow to 250 at the end of the descent.

Would this work in the -9 as well? (thread got my curiosity)

It is the same formula as he showed me in his example. Alt need to lose*3 drop the zeros for a 3:1 and alt to lose*6 and drop the zeros for a 6:1. tailwind/icing/slowing down increase the distance, headwind decreases the distance.

Is that a fixed rate of descent or how does equate to feet/min?

 

[bahumba]

If you've got a DME and a clock you just count how many 1/10's of a mile you fly in 36 seconds and add a zero!

Fly it like a -200 baby!

Gup

Only works when proceeding directly to/from station.

 

[airplane wizard]

Perhaps a change of your screen name would be in order ?

hahaha