looking at the Boeing 777, Airbus A330 and A321. Voyageur Aviation Corp located in North Bay, Ontario converts the DHC-8-100 into the DHC-8-100 Package Freighter Conversion. An A300B4-200F conversion cost $5M in 1996, an A300-600F $8M in 2001, an MD-11F $9M in 1994, a B767-300ERF $13M in 2007, a B747-400 PSF $22M in 2006, an A330-300 P2F was estimated at $20M in 2016 and a B777-200ER BCF at $40M in 2017. By avoiding the main deck door installation and relying on lighter elevators between decks, LCF Conversions wants to convert A330/A340s or B777s for $6.5M to $7.5M. In the mid 2000s, passenger 747-400s cost $30–50 million before a $25 million conversion, a B757 had to cost $15 million before conversion, falling to below $10 million by 2018, and $5 million for a 737 Classic, falling to $2–3 million for a B737-400 by 2018. Derivative freighters have most of their development costs already amortized, and lead time before production is shorter than all new aircraft. Converted cargo aircraft use older technology; their direct operating costs are higher than what might be achieved with current technology. Since they have not been designed specifically for air cargo, loading and unloading is not optimized; the aircraft may be pressurized more than necessary, and there may be unnecessary apparatus for passenger safety. Dedicated civilian cargo aircraft A dedicated commercial air freighter is an airplane which has been designed from the beginning as a freighter, with no restrictions caused by either passenger or military requirements. Over the years, there has been a dispute concerning the cost effectiveness of such an airplane, with some cargo carriers stating that they could consistently earn a profit if they had such an aircraft. To help resolve this disagreement, the National Aeronautics and Space Administration (NASA) selected two contractors, Douglas Aircraft Co. and Lockheed-Georgia Co., to independently evaluate the possibility of producing such a freighter by 1990. This was done as part of the Cargo/Logistics Airlift Systems Study (CLASS). At comparable payloads, dedicated cargo aircraft was said to provide a 20 percent reduction in trip cost and a 15 percent decrease in aircraft price compared to other cargo aircraft. These findings, however, are extremely sensitive to assumptions about fuel and labor costs and, most particularly, to growth in demand for air cargo services. Further, it ignores the competitive situation brought about by the lower capital costs of future derivative air cargo