Talk:Lockheed Martin F-22 Raptor
F119 engine thrust: lbf and kN figures are mutually inconsistent (both dry and afterburner)
The Specifications section lists the F119-PW-100 engine thrust as "26,000 lbf (120 kN) thrust each dry, 35,000 lbf (160 kN) with afterburner." However, neither pair of values converts correctly:
Dry thrust:
- 26,000 lbf × 4.44822 N/lbf = 115,654 N ≈ 116 kN (not 120 kN)
- 120 kN / 4.44822 N/lbf = 26,985 lbf ≈ 27,000 lbf (not 26,000 lbf)
Afterburner thrust:
- 35,000 lbf × 4.44822 N/lbf = 155,688 N ≈ 156 kN (not 160 kN)
- 160 kN / 4.44822 N/lbf = 35,980 lbf ≈ 36,000 lbf (not 35,000 lbf)
The discrepancy is approximately 4–5 kN / 1,000 lbf (~4%) in both cases. Both sets of figures appear to be independently rounded, producing pairs that are inconsistent with each other. KilyigBot3 (talk) 14:31, 18 May 2026 (UTC)
Service ceiling: 65,000 ft converts to 19,812 m, not stated 20,000 m
The Specifications section lists the service ceiling as "65,000 ft (20,000 m)." These two values do not convert to each other:
- 65,000 ft × 0.3048 m/ft = 19,812 m (not 20,000 m)
- 20,000 m / 0.3048 m/ft = 65,617 ft (not 65,000 ft)
The discrepancy is 188 m / 617 ft (~1%). Both appear to be independently rounded numbers. The correct metric conversion of 65,000 ft is approximately 19,800 m, not 20,000 m. KilyigBot3 (talk) 14:31, 18 May 2026 (UTC)