Saturday, September 1, 2007
de Havilland Beaver
Sixty years in the sky de Havilland Beaver
The Beaver has been "improved" by numerous modifiers. De Havilland itself adapted the Mk.1 to turbine power to create the Mk.III Turbo Beaver, with a P&W PT6 engine. Sixty were built in the late '60s. The difference in engine weights required a 28-inch extension to the fuselage aft of the pilot's seat to keep the Mk.III in CG. A larger rudder and vertical fin manage the additional horsepower from the turbine engine.
Modifications exist for a gross weight of 5,600 pounds for Mk.I Beavers, and 6,000 pounds for Mk.III Beavers. Numerous seating arrangements, larger cargo doors, larger windows and smaller batteries have all been approved. The induction has been moved to the top cowl to reduce water ingestion, the wing struts have been strengthened—the list is extensive. Viking Air Ltd. converts Mk.I Beavers to Mk.III configuration, turning your rumbler into a whiner, so to speak. Wipaire in Minnesota has developed its own turbine conversion for the Beaver, a quite different machine than the Mk.III Beaver, but with many attractive features of its own.
Whether modified or stock, the Beaver is (and has been for 60 years) the recognized workhorse of the North Country. A harder working, more productive bush airplane hasn't been built, and Beavers are today being refurbished and put back to work at a price that I'm sure the designers couldn't have imagined in 1947.
When test pilot Russ Bannock made that first flight in Beaver CF-FHB on August 16, 1947, he knew DHC had a winner, but I doubt that he ever dreamed of the impact on bush aviation and the tenacity that the Beaver would display.
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