Airfield Performance Evaluation of an Advanced Propeller on the C-130H
Bibliographic record
Abstract
The NP2000 is an advanced, eight-blade propeller with a more modern aerodynamic design than the four-blade 54H60 propeller currently used on the C-130H. Flight tests performed on a U.S. Air Force C-130H with NP2000 propellers installed in place of the original fourblade propellers were conducted using modern flight-test instrumentation and techniques to determine the effect of the new propellers on aircraft performance. The testing demonstrated greater net thrust at equivalent power settings. The increase in takeoff thrust resulted in greater low-speed acceleration and reduced four-engine takeoff distances. The new propellers exhibited different power transition characteristics and increased residual thrust at low power settings. Furthermore, the altered propeller slipstream effects changed the lift and drag characteristics of the airplane. The flight test results also revealed that greater takeoff thrust caused corresponding increases in minimum control speeds which negatively impacted critical field length in some cases. Landing speeds and distances were adversely affected by increased residual thrust at low power settings. The cumulative effect of the changes to airfield performance required a comprehensive update to the C-130H performance model.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".