I found this article on (mostly) WWII American aircraft radar. It seems as though it was more effective than I imagined.
http://www.history.navy.mil/library/online/radar.htmEven though most of the applications are for detecting ground or sea targets (but there is some application for detecting aircraft), the implementation of this would be valuable particularily if weather fronts and/or night were re-introduced to the game.
Here's a couple of examples, this one air to air:
DESCRIPTION: Airborne interception set for single-seated nightfighters.
USES: Used to detect and intercept enemy aircraft in fleet operations and in attacks against fixed bases. Designed to work in connection with SM or any GCI set, and has provisions for operating with AN/CPN-6 racon, and for IFF identification connections. Provides range, bearing and relative elevation data, and b, modified H or G indications, all appearing on a single scope.
PERFORMANCE: Detects plane at maximum reliable range of 3 miles and tracks target to 360 ft. Range accuracy is ± 10% on racon, ± 5% in tracking, and ± 25 yds. in gun-laying. Covers ± 60° forward in bearing and elevation. Bearing accuracy is ± 3° on racon, ± 1/2° in gun-laying. Elevation accuracy is ± 3°.
TRANSPORTABILITY: Packaging for shipment is not yet standardized, but total package weight should not exceed 350 lbs.
INSTALLATION: Installed in F4U-2 and F6F-3. In F4U-2, installation weighs 310 lbs., requires removal of two machine guns, and reduces plane's top speed by 2 mph. Installation has no effect on armament or speed of F6F-3.
PERSONNEL: Set is operated by pilot. One maintenance man per set is required.
POWER: Total primary power required: (a) form combination AC-DC primary generator (NEA-3 or NEA-5) -- 30 amps., 27.5 V, DC and 1050 watts, 115 V, 400-2400 cycles AC; or (b) from primary DC generator, requiring use of motor-alternator (800-1-B) -- 91 amps., 27.5 V DC.
And this one air to ground:
DESCRIPTION: Airborne long-wave search set for patrol bombers. Range and left-right indication are provided on an ASV scope. IFF identification signals are displayed directly on the scope. These sets are no longer in production.
USES: For locating and homing on craft or coastal targets, and for navigating. Sets work with SCR-621 or YH racon.
PERFORMANCE: Reliable maximum ranges: surfaced submarines (broadside), 6 miles; 4,000-8,000 ton ship, 25 miles; well-defined coastline, 60 miles. Minimum range is 350 yds. Range accuracy, ± 10%. Sets cover forward 150° when searching, 40° when homing on a target. Bearing accuracy in homing is ± 2° to ± 5°.
TRANSPORTABILITY: Sets are packed in 7 units for shipment, weighing a total of 300 lbs. Largest package is 16" x 21" x 24" and weighs 78 lbs.
INSTALLATION: SCR-521's are installed in B-17, B-24, B-25 and B-34 planes. ASVC and ASE are installed in B-17, B-24, PBY5, PBY5A, and PBN. The external antennas reduce plane's top speed by about 5 to 7 knots, and the forward nose antenna interferes with the firing of the forward flexible guns. (The addition of a polyplexer in future installations will eliminate the nose antenna).
PERSONNEL: Army requires one operator and one maintenance man per set. Navy requires one operator per set and 4 maintenance men per squadron.
POWER: Total primary power required: (a) from combined AC-DC generator -- 2.6 amps., 27.5 v. DC and 500 watts, 115 v., 800-2400 cycles AC; or (b) from primary DC generator, requiring use of motor-alternator -- 39 amps., 27.5 v. DC.