AE & RHS Durability & Maneuverability Formulas

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AE & RHS Aircraft Durability & Maneuverability Formulas

Aircraft Durability Formula:

General: The factors to use in the Durability were outlined by Joe Wilkerson, a mathematician, in WITP days, when he led a team to standardize Japanese aircraft data for a mod called CHS. I led a forum discussion which defined the formula. [The product of that team was accepted by Andrew Brown, the “CHS Coordinator. A few days later, it was rejected by a CHS “plank holder.” Andrew then suggested a new mod be created using the same data, expanding the standardized formulas to include the Allies. That was the birth of the first generation of RHS.]

Constant: The formula has a constant in front (K). After testing in game, we decided K = 2. The default case (K = 1 which is the standard case, indicated durability was too low.

Formula: K * [(Structure + Armor) + (Engines + Pilots)] * square root of Empty Equipped Weight

Structure Scale: Non-metal = 0.50
Composite = 0.75
All-metal = 1.00
Geodesic = 1.50 [Only used by Vickers Armstrong Bombers]
Armor Scale: None = 0
Normal = 1
Extreme: 2 [Only used by Soviet IL-2 models]

Engine Scale: Number of Engines [0 to 6; 0 for a glider]

Pilot Scale: Number of Pilots (including relief pilots) in normal crew

Weight Definition: Empty Equipped Weight in North American Tons (2,000 pounds), including fractions.

Aircraft Maneuverability Formula:

General: This formula was developed entirely in the original WITP Forum on War in the Pacific. The debate was remarkably prolonged and contentious. This is because there is only one maneuverability field which requires a composite value that includes all the different aspects of maneuvering. The final proposal which worked was proposed by Mifune (Eric Garfein). Instead of adding wing loading and power loading, he suggested subtracting them.
 
AE & RHS Aircraft Durability & Maneuverability Formulas, Page 2

Formula: [(Speed/20) + (ROC/200) – ((EE Weight/Wing Area)/20) – ((Gross Weight/Power)/5) / Engines] + Maneuverability Bonus

Speed Definition: Speed in mph or knots

ROC Definition: Initial Rate of Climb in feet per minute

EE Weight Definition: Empty Equipped Weight in pounds

Gross Weight Definition: Gross Weight in pounds

Wing Area Definition: Wing Area in square feet

Power Definition: Engine Take off Horsepower times the number of engines

Number of Engines: Number of Engines [Glider = 0, otherwise always 1 to 6]

Maneuverability Scale: Normal = 0
Fowler Flaps or equivalent = 2

Special Consideration for Glider “Combinations”:

Gliders are presented as “combinations” of tug and one or more gliders.

Composite Durability: The durability of the combination is the sum of the durability of the tug and the durability of the glider(s), so for two gliders use 2 * glider durability.

Composite Rate of Climb: 63% of Tug Rate of Climb

Composite Range: 76% of Tug Range

Case 1: Tug is Transport: 76% of Tug Range
Case 2: Tug is Bomber: 67% of Tug Range (88% of 76% = 67%)
[See Aircraft Range Formulas: AE Transfer Range for Transports is 88% of Ferry Range, while bomber Transfer Range is 100% of Ferry Range]