Old Aircraft Rules

[The Rock Doctor]

AIRCRAFT

1902:  Primitive flying machines (storyline stuff only)

AIRCRAFT: No cost, just sane numbers (maybe 100 or so max)
AIRFIELDS: No cost, but you can't use them for anything past this level

1906:  Historical 1910 aircrafts

AIRCRAFT: $0.10 for 100 single-engine aircraft (not really any 'types' at this level)
AIRFIELDS: $0.50 per airfield; basically, just a flattened piece of land

1910: historical 1914 aircrafts

AIRCRAFT: $0.10 for 100 single-engine aircraft
                 $0.20 for 50 multi-engine aircraft (with historical bomb load)
AIRFIELDS: $1.00 per airfield; includes hangers, fuel tanks, support personnel

1913:  historical 1916 aircrafts

AIRCRAFT: $0.20 for 100 single-engine aircraft (fighter or bomber with historic loads)
                $0.30 for 50 multi-engine aircraft (with historical bomb load)
                $0.40 for 25 long-range bombers (with historical bomb load)
AIRFIELDS: $1.50/.5BP per airfield; includes hangers, fuel tanks, support personnel

1917: historical 1918 aircrafts

AIRCRAFT: $0.30 for 100 single-engine aircraft (fighter or bomber with historic loads)
                $0.40for 50 multi-engine aircraft (with historical bomb load)
                $0.50 for 25 long-range bombers (with historical bomb load)
AIRFIELDS: $2.00/1BP per airfield; includes hangers, fuel tanks, support personnel

1921: historical 1922 aircrafts

AIRCRAFT: $0.40 for 100 single-engine aircraft (fighter or bomber with historic loads)
                $0.50 for 50 multi-engine aircraft (with historical bomb load)
                $0.60 for 25 long-range bombers (with historical bomb load)
AIRFIELDS: $2.50/1.5BP per airfield; includes hangers, fuel tanks, support personnel

1928: historical 1930 aircrafts

AIRCRAFT: $0.50 for 100 single-engine aircraft (fighter or bomber with historic loads)
                $0.60 for 50 multi-engine aircraft (with historical bomb load)
                $0.70 for 25 early long-range bombers (with historical bomb load)
AIRFIELDS: $2.50/2BP per airfield; includes hangers, fuel tanks, support personnel

Construction and Maintenance

A unit of aircraft takes six months to manufacture.  Upon completion, they are immediately available for use.

Like airships, a group of aircraft of this era are delicate and do not last long.  They are effective for six years.  Maintenance costs are 12.5% per half-year when active, and 25% per half-year when mobilized.

Aircraft can not be upgraded or modernized.

Airstrips require one month per $0.50 cost to construct.  Upon completion, they are immediately available for use.

Like ports, there is no maintenance cost associated with airstrips.  They may be upgraded to later/larger airstrips by paying the difference in cost between original and new configurations.  Airstrips can, in theory, be used indefinitely, so long as they've been kept up to the standards required of the aircraft using them.