TWIN COMMANDER SERIES

The Model 500S also known as the model 520, is the orginal Twin Commander. The
prototype design was certified by the CAA, the predecessor organization to the FAA, in
1950. The first 500S rolled off the assembly line in August of 1951. The 500S was known
as the Shrike Commander. Despite its shorter length compared to later models, the 500S
could comfortably carry seven passengers and 350 Lbs of luggage. The plane had a max
range of 700 nautical miles or about 5 hours worth of endurance over a fire incident.

The Model 690 is a 260 knot aircraft that can carry 8 passengers over 1400NM range or
about 5 hours of endurance over a fire incident



Ponderosa Aviation has been flying the Twin Commander series of aircraft since 1974. We
have owned many different Shrike's thoughout our history, buying and selling to upgrade
and modernize our fleet. We have flown more that 100,000 hours on this series of aircraft

without any accidents or incidents in our 34 years of operation of Air Taxi/Fire Fighting
service. Safety has always been, and will always be our number 1 priority!


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