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The name was chosen to evoke the famous German Big Bertha howitzer. The original Big Bertha driver was launched in 1991. At the time, its design was considered highly modern and a radical departure from older drivers: it was crafted entirely of stainless steel and the head had a volume of 190 cm 3 (12 cu in). Most other drivers were still made ...
The Big Bertha driver grew to 290 cc in 1997. [ 7 ] In 1996, the company hired Roger Cleveland as chief club designer and in 2002, launched the Callaway Golf Forged Wedges, constructed from carbon steel with modified U-grooved faces.
Callaway Golf continued to expand the size of the clubhead to increase these effects, resulting in the Bigger Bertha, the Great Big Bertha, and others in the line. The current incarnation of the Big Bertha driver is 460 cm 3 (28 cu in), which is the maximum allowable clubhead volume according to USGA rules, [ 2 ] though larger clubheads exist ...
Bertha Heyman, a.k.a. "Big Bertha", a 19th-century criminal; Big Bertha (cow), a cow that broke two Guinness World Records, for being both the oldest and having the most offspring; Big Bertha (golf club), a line of golf clubs from Callaway Golf; Big Bertha (drum), one of the world's largest bass drums; IBM T220/T221 LCD monitors, nicknamed Big ...
A muscle back is the more traditional design and consists of a solid metal head, typically made of forged iron. The design of the club typically distributes the metal more evenly around the clubhead (though most designs still place more weight along the sole of the club), which makes the center of mass of the club higher and the moment of inertia (the clubhead's resistance to rotation) lower ...
Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.