The "Buffalo" was the Navy flunky and the B-239 was the "export" variant to all countries that bought them. Below is the official specs on the plane and the Finns added MORE weight with 50's instead of 30's, more ammo load and a steel plate behind the pilot. Check the date...these were NOT some improved version....:
http://koti.welho.com/myrjola/war/faf/brewster.html.
I am certain Gramps remembered it right...since the weight loadout changed very little after the CV equipment was uninstalled and replaced with the items listed below.
Acquisition to Finland
Finland bought 44 Brewster B-239s in 16th,
December 1939, but they were received too late to see any combat during the Winter War. Unit price was 54 000 USD plus packing and delivery costs, also 10 spare engines, 20 propellers and other spare parts were purchased for a total sales price of 3.4 million dollars (168 million Finnish Marks). To the purchasers surprise all US Navy "property" were removed at the factory from the Brewsters bought by Finland: guns, sights, instruments and carrier equipment. Initially separately purchased Aldis-optical (binocular) sights were used, but in the spring of 1941 before reflector sights (Finnish Väisäla T.h.m.40 sights which were based on Revi 3c) were installed in the Finnish Brewsters. Metric instruments were installed in Finnish Brewsters.
The Finnish B-239 "export"-models were equipped with refurbished R-1820 G-5 engines taken from DC-3 airliners.
The B-239s were designated from BW-351 to BW-394. Read more information about Brewsters to Finland at the Fighter Tactics Academy web-site.
During the war the single 0.30" machine gun was replaced with a 0.50" (12.7mm) and in 1943 all except one Finnish B-239s had four 0.50" machine guns. The wing guns had 400 rounds and fuselage guns 200 rounds each (0.30" had 600 rounds).
Pilot seat armor was installed to Finnish Brewsters (important difference for pilot safety compared to F2A-1 and dictated by the Winter War experience). There was a lot of other little fixes, changes and improvements to the B-239 that were made locally in Finland during it's career.
Brewster B-239 specifications
Wingspan: 10.67 m
Length: 8.03 m
Height: 3.66 m
Wing area: 19.4 m2
Empty weight: 2020 kg
Typical takeoff weight: 2415 kg (with 300kg fuel)
Engine: 950 HP Wright Cyclone R-1820-G5.
1000 HP with War Emergency Power (for 5 mins max).
Armament: 3 x 0.50 cal + 1 x 0.30 cal.
Later 4 x 0.50 cal (12.7 mm) machine guns.
Max speed: 480 kmph(299mph, 261Kts) at 4750 (15,500ft) meters. 428 (266mph, 231kts) kmph at sea level.
Service ceiling: 9900 meters. Climb to 3000 meters 4 minutes 12 seconds, 5000 meters 7 minutes 10 seconds.
Range: 1350 km with 390 kmph cruise speed (full 600 liter fuel load), flight time 3 hours 30 minutes. Max flight time over 4 hours with lower speeds.
O V E R M O D E L E D
Maybe your next source shouldn't be wiki
Changeup