General Information

This table uses averaged figures
for an averaged configuration.

Take-off weight (lb)139,760
Rotation Speed (kias)145
Stall Speed (kias)123
Rate of climb at SL (fpm)1,800
Max. speed/alt (kias/ft)350/10,000
Cruise speed (kias)350
Cruise alt Out/In (ft)**20,000/32,000
Mission time (hrs)***9 to 12
Landing approach speed (kias)120
Landing stall speed - power off/app pwr (kias)88/80
Landing groundroll (ft)1,600
Landing - 50 ft obstacle (ft)2,350

Flaps (kias)
1200
2170
3140

Configurations:

According to the document in this URL,
http://www.history.navy.mil/planes/p-3c.pdf
there are 17 different configurations.
They incorporate Normal, Military and
Combat versions of these categories:

ASW1, ASW2, Recon, MineLaying,
Patrol and Escort, Low Altitude Patrol
(ASW = Anti Submarine Warfare)

The table below offers some useable ranges
for Flight Sim purposes.

Normal Power
Take-off weight (lb)138,760-139,760
Fuel (lb)*55,940-62,587
Payload (lb)4,829-12,000
Stall speed (power off) (kn)123-125
Take-off run (ft)4,660
Take-off run to clear 50ft (ft)6,100
Max. speed/alt (kn/ft)350-380/10,000
Rate of climb at SL (fpm)*1,600-1,800
Combat range (nm)3,220-4,414
Cruise speed (kn)275-353
Cruise alt Out/In (ft)**20,000/32,000
Mission time (hrs)***9-12

*Military Power variations
Fuel (lb)33,564-37,552
Rate of climb at SL (fpm)2,500-2,600
Combat ceiling (ft)25,000-27,000
Max speed at SL (kn)348-370
Max speed/alt (kn/ft)377-404/15,000

Landing Weight
Fuel (lb)5,594-6,259
Stall speed - power off/app pwr (kn)88/80
Landing groundroll (ft)1,600
Landing - 50 ft obstacle (ft)2,350

**Cruise alt Out/In
Cruise alt Out = Cruise altitude out to destination
Cruise alt In = Cruise altitude returning to base

***Mission time/duration:
During search and patrol missions and once out at the search or patrol destination, it is common for the pilot to switch off one or two engines. This is done to preserve fuel, extending duration, and is typically done to engine 1 (outer left) first, because that engine has no generator.