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"50-seat aircraft compared"    updated 06/07/01
    from article in issue 53 of Aircraft Economics, 2000
        web site = http://www.aircrafteconomics.com

Assumptions for 200 nautical mile flight legs (blocks):
    Block time (time for flight) 42 to 56 minutes
    30 minutes between flights
    80 cents per US gallon for fuel
   $5,000 a month for captain
   $3,500  a month for first officer
   $2,250 a month for cabin attendants
   Landing fees of $10 per tonne of maximum take-off weight
   En-route air navigation charges - based on European rate of $60 per 100km for 50 tonne aircraft
        price proportional to square root of aircraft weight 
        [Skycar is 1/50 the weight, so air navigation charge would  8.5 cents/km]
  Monthly lease rate 0.80% of aircraft price 
        [Skycar  0.80% of $400,000 = $3,200/month]
  Hull insurance rate 0.5% per year of list price
        [Skycar 0.5% of $400,000 = $2,000/year]

Direct Operating Costs for 200 nautical mile flight leg
   averages 4 aircraft:  ATR 42-500, Bombardier Dash8Q-300 and CJR-200, Embraer ERJ-145

Fuel              $200   
Landing fees      $200
Navigation Charge $140 {$10 for Skycar [0.085/KM /1.6*200 miles]}
Crew Salaries     $230
Maintenance       $250
Lease / ownership $600 
Hull Insurance     $32
Total Direct Operating Costs per 200 mile flight = $1600
     Total Direct Operating Costs/seat = $33 (50 passengers)

Variable Operating Costs (no details provided)
    assume these are the per passenger costs for extra fuel, ticketing, luggage, food, etc.

Variable Operating Costs/flight  $1000
    Variable Operating Costs/seat  $20 (50 passenger aircraft)

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Sensitivity analysis of direct operating costs from issue 54 of Airline Economics
     "Regional aircraft cost comparisons"    with 14  new aircraft with 50+ seats

The following are approximate Direct Operating Cost sensitivities for 300 nautical mile flight legs

Fuel use            14%
Landing charges     15%
Navigation charges  11%
Crew salaries       10%
Maintenance         15%
Lease / ownership   36%
Hull insurance       2%