OpenAP engine properties
OpenAP / Junzi Sun · Retrieved 2026-09-05
LGPL-3.0; source dataset includedPRATT & WHITNEY
PW4256
Turbofan
ENGINE9 documented fields
OpenAP reference record 1PW051. Values describe the source configuration and test conditions. Fuel-flow modes are reference test points, not an in-flight fuel prediction. Dimensions and certified operating limits are not supplied by this dataset.
Reference thrust252400 N
Bypass ratio4.7 :1
Pressure ratio29.3 :1
Takeoff fuel flow2.449 kg/s
REFERENCE COVERAGELoading coverage…
PROVENANCE1 linked source
LAST RETRIEVED2026-09-05
View missing fields and source dates
Source editions
OpenAP engine properties ↗Edition / snapshot: Reference snapshot, September 2026Retrieved: 2026-09-05
Retrieval dates record when Owl obtained the data; they are not publication dates or proof that a specification is current. Where the edition contains only a snapshot date, the original publication date is not recorded.
01
Output
- Reference maximum thrustOpenAP engine dataset · 1PW051 · max_thrust
- 252,400 N
02
Architecture
- Bypass ratioOpenAP engine dataset · 1PW051 · bpr
- 4.7 :1
- Overall pressure ratioOpenAP engine dataset · 1PW051 · pr
- 29.3 :1
03
Fuel flow
- Approach fuel flowOpenAP engine dataset · 1PW051 · ff_app
- 0.647 kg/s
- Climb-out fuel flowOpenAP engine dataset · 1PW051 · ff_co
- 1.981 kg/s
- Idle fuel flowOpenAP engine dataset · 1PW051 · ff_idl
- 0.188 kg/s
- Reference LTO fuelOpenAP engine dataset · 1PW051 · fuel_lto
- 813 kg
- Takeoff fuel flowOpenAP engine dataset · 1PW051 · ff_to
- 2.449 kg/s
04
Provenance
- Source manufacturer nameHistorical source label retained.
- Pratt & Whitney
Aircraft connections
Exact engine-name matches in the aircraft catalogue. This is not a complete installation or certification list.
No exact aircraft connection documented in this dataset.
Dimensions, dry weight, shaft-power ratings and certified limits are not documented in this engine dataset.
Sources & context
Reference values vary with model, rating and conditions. Consult the relevant manufacturer documentation for certified specifications.