Delta Virtual Airlines Water Cooler - Some B722 Rules of Thumb

Delta Virtual Airlines Water Cooler | Airline Operations | Some B722 Rules of Thumb

DVA1767
Captain, B727-200

Joined on July 02 2004
Century Club
Online Century Club

Midwestern United States

107 legs, 156.8 hours
104 legs, 153.2 hours online
6 legs, 12.1 hours event
501 legs, 763.5 hours total

Posted onPost created on August 16 2004 10:46 ET by Michael Carter

1.) Landing V-ref flaps 30: Take weight in thousand over 100,000 lbs, divide by two, add 107. IE: 140,000Lbs, weight over 100K is 40K, half of that is 20, and add 107 to get the V-ref landing speed. In this case, 127KIAS.

For flaps 15 add 122 instead of 107
For flaps 5, add 137 instead of 107
For flaps 0 add 167 instead of 107

2.) Take-off V-ref at 140,000 Lbs:

Same formula as above except:

Add 8 KIAS for flaps 5
Add 12 LIAS for flaps 15
SUBTRACT 8 KIAS for flaps 25

3.) Best Climb Speed: 1/2 gross weight over 100K Lbs +270KIAS. In the 140,000Lbs example above, 40K is the overage, divided by 2 equal 20, 20+270 is 290KIAS for best climb speed.

4.) Best Descent Rate: 3 times the altitude to loose, distance to start down at 280 KIAS @2500FPM
IE: FL350 down to one-two thousand is 23,000' 23x3 is 69 miles to start the descent. If you use this formula you will be leveling five miles before the intersection or waypoint and slowing to 250 knots as the nose is coming up. That is, if you have a speed restriction, not all intersections do.

As your altitude gets lower you will see the airspeed start to creep up. Add a little spoiler if you have to to keep the speed at 280 until approaching your target altitude. Don't forget to stow them again though. You'll have the engines working against them after leveling off and your Master Warning will illuminate for an incorrect configuration.

5.) Approach speed power setting: Fuel flow should be around 3500 PPH give or take a bit depending upon weight. This is a good figure to start with and will be very close to bug speed.

6.) DME Arc Lead: 10% of your ground speed to lead the turn. 220KGS will be a 2.2 mile lead to turn onto the arc.

Michael Carter (DVA1767)

Posted onPost created on August 16 2004 10:47 ET by Michael Carter

CORRECTION, for the DME arc lead it should be 1% of your GS, NOT 10%. Sorry.

Michael Carter (DVA1767)

DVA1633
Senior Captain, L-1011-100

Joined on April 17 2004
Century Club

Den Haag, Zuid-Holland NL

163 legs, 437.6 hours
2 legs, 11.5 hours online

Posted onPost created on August 16 2004 14:24 ET by Sander Jordans

you realy are a 727 fan biggrin

Posted onPost created on August 16 2004 14:46 ET by Michael Carter

YESSS I AM!!!

Michael Carter (DVA1767)

DVA1099
Senior Captain, L-1011-100

Joined on February 20 2003
Double Century Club

South America

277 legs, 1,092.6 hours
50 legs, 126.5 hours online
1 legs, 2.0 hours event
354 legs, 1,417.3 hours total

Posted onPost created on August 16 2004 15:10 ET by Ariel Griotti

Is a very good info Mike. Thanks for share!!!

Ariel Griotti (DVA1099)

Posted onPost created on August 16 2004 15:26 ET by Michael Carter

Nice to see you again Ariel. I'm not sure how this would work for other aricraft, especially Heavies like the L1011, but if I can find something on the L1011 I'll sure post it for the L1011 and DC-10 drivers. I'm sure the formulas would be quite similar for both aircraft.

I know the DME Arc Lead is pretty much standard for whatever you're flying. It works as well with Cessna's as it does with C-5's because it's based on GS and not aircraft. Wind direction and speed is the important factor with this Rule of Thumb and you'll have to make adjustments for a particular circumstance to maintain the arc.

Thanks for the reply. I must be the only one here totaly absorbed into the B722. I guess that's because I always thought I would fly it someday.

Michael Carter (DVA1767)

Posted onPost created on August 16 2004 19:25 ET by Ariel Griotti

Thanks Mike, and of course! it would be great to have that info for the Tristar and the DC-10!

Ariel Griotti (DVA1099)

DVA1633
Senior Captain, L-1011-100

Joined on April 17 2004
Century Club

Den Haag, Zuid-Holland NL

163 legs, 437.6 hours
2 legs, 11.5 hours online

Posted onPost created on August 17 2004 01:10 ET by Sander Jordans

no micheal you're not the only one I once was a total 727 fan myself.
but if everything goes whell i'm soon flying the plane I always wanted, the L1011!

BTW: I now have my 727-200 rating wink

DVA1195
Senior Captain, L-1011-100

Joined on April 25 2003
Century Club

IN USA

136 legs, 145.5 hours
12 legs, 13.5 hours online
30 legs, 25.9 hours ACARS

Posted onPost created on August 18 2004 09:37 ET by Jacob Perry

Michael, that's fantastic info.

Thanks!

Jacob Perry

Senior Captain, L-1011-100

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