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1977 P337 Skymaster with Gross Wt
increase to 5120 lbs, wing extensions,
40 gallons aux fuel tanks, Winglets and
large tail boom fairings.
Wing span = 44’6”
1979 T337 with Rocket Winglets and
medium tail boom fairings.
Wing span = 39’2”
STCs, Mods, and Parts for Skymasters including O-2s
  • Wing extensions for all models
  • ~10% increase performance
  • Mechanical Cowl Flap conversion for 336s and 337s
  • Rocket Winglets
  • Performance enhancements
  • ~5-8% increase in overall performance
  • A savings of ~ $22.50 in fuel for each 3 hour trip
  • Will save ~$50 in engine reserve for each 3 hour trip
  • If flown ~ 200 hours per year ~ $4785 savings per year
  • 310-375 hp engine conversions for all Skymasters
  • Front, rear, or both
  • 3 bladed propellers for all Skymasters
  • STOL kit
  • All composite leading edge cuff
  • Tail boom to vertical fin fairings
  • Large/medium
  • Stall fences for wings (composite)
  • Flap gap seals for 336
  • Fuel Jettison System
  • Rear firewall engine access door for ’63-72 models
  • Rear engine cooling scoops and louvers
       (current pricing special)
  • The ultimate in rear engine cooling
  • 25-50 gallon under wing tanks
  • 16-25-40 gallon aux fuel tanks
  • Inside the wings
  • 40 gallon Auxiliary Fuel tanks
  • Tip tanks
  • Landing gear in transit warning light for ‘73-80 337s
  • Saves power pack motor in case of micro switch malfunctions, etc.
  • Coming, turbo-normalizing (supercharger system)
  • Low Oil Pressure warning system
  • Fire detection system for both engines
  • Speed Brakes
Contact us for more information
For pricing information click here
Skymaster Mods & Parts