To Find Flaps 30 V Ref for Weight

1.      Take the weight in thousands over a 100,000lbs

2.      Divide by 2

3.      Add 107

Example
Let's say our weight is 140,000lb's, find the flap 30 V Ref
Weight over 100,000lbs is 40
Divide 40 by 2 to get 20
Add 107 to get V Ref Flap 30
So That's 20+107 That equals 127 Kts IAS ( It's Pretty Close, Eh!)

To Find Flaps 15 V Ref
use the above procedure and add 122 at item 3 instead of 107 (increase of 15)
So Flap 15 V Ref is 20+122 = 142 Kts

To Find Flaps 5 V Ref
Use the above procedure but add 137 at item 3 instead of 107 (increase of 30)

So Flap 5 V Ref is 20+137 = 157 Kts
To Find Flaps 0 V Ref

Use the above procedure but add 167 at item 3 instead of 107 (increase of 60)
So Flap 5 V Ref is 20+167 = 187 Kts

Estimation of Take Off V Speeds

• Flap 15 V2 Speed will be 12 Kts more than V1/VR speed
• Flap 5 speeds should be about 8 kts more than flaps 15 V1/VR speed
• Flap 25 speeds will be about 8 kts less than flaps 15 V1/VR speed

Again you use the above procedure but add 104 at item 3
Using the same 140,000lb's example
Weight over 100,000lbs is 40
Divide 40 by 2 to get 20
Add 104 to get V Ref Flap 15
So That's 20+104 That equals 124 Kts This is an approximation of V Ref flaps 40 and V1/VR for flaps 15.
So finishing the example using the above criteria

Flap 15                                  Flap 5                                     Flap 25

V1/VR 124                             V1/VR+8=132                       V1/VR-8=116

V2 124+12=136                    V2 132+12=144                    V2 116+12=128

727-200
Best Climb Speed: 1/2 Gross Weight Over 100,000 + 270 = Climb Speed

Again the using that 140,000 lb example. 20+ 270=290 Kts

727-100
Best Climb Speed: 1/2 Gross Weight Over 100,000 + 280 = Climb Speed
Again the using that 140,000 lb example. 20+ 270=300 Kts

Best Decent Rate
3* the altitude to loose distance to start down (approx 280 kts-2500fpm)

Example
FL 350 3*35=105 NM TOD ( Don't forget you may need to slow down)

Best Decent Gradient
Altitude (FL) = Descent angle then multiply by miles per min = decent fpm in (100')
Distance (NM)

Example FL200 Dist 50 NM
200     =Decent angle 4 then * mile per min say (6) = 24 =PO(2,400 fpm)

Initial Cruise EPR:

To determine the initial cruise EPR you can use the following formula to be approximate

Twice the altitude (FL) +1/2 the Gross Weight over 100,000= Last two digits of cruise EPR.
Example 140,000lb's at FL33 - So 2* 33=66+ (40/2=20)=1.86

To Find VDP

If the VDP is not published, take the altitude to descend from the MDA to TDZE (number in parentheses next to MDA) and move the decimal point one place to the left. This gives you your time in sec's to subtract from time to MDA to get time to VDP.
Don't miss the runway its career limiting

To Find ISA & TAT

To Obtain ISA Temp Double the altitude and subtract 15
To Obtain TAT From ISA @ .80M add 30

Don't get clever just double it to get knots. So if some "metric" twat gives you a "clear to land wind is 230 at 12 meters sec" it's 24 knots give or take a tad. 3 meters a second is 6 knots, get the idea.

The first 100 NM will take approx 17 min's time you clean up and get going, (+/- 2 min, which is what you can cock it up by anyway)

For DME Arcs lead the arc by one percent of your ground speed. For example if you ground speed is 220 Kts lead the arc (turn on) by 2.2 NM. Make sure you get a rate one turn on, Don't mess about at 10 deg bank).