Skymaster Mods & Parts
FLIGHT TESTS: Performed on 25 January 2002 in Nashville, TN
Comparison of 3 bladed vs 2 bladed propellers on Normal Aspirated 1968 Cessna 337, N2636S
Configuration: Full fuel tanks, 2 passengers and baggage for both flights.
First flight = 3 bladed props, Second flight = 2 bladed props
Pilot: Steve Lloyd Tests Results Recorded by Owen Bell

ADVANTAGES of the 3 Bladed M.T. Propellers vs 2 Bladed McCauley Props

1. Noise Reduction at the same power settings:
  • 1 Decibel less noise during Taxi
  • 3 Decibels less noise during Climb
  • 4-5 Decibels less noise during cruise at 6500 ft

2. Performance improvements at the same power settings:
  • ~3 seconds less ground roll on take off run
  • Propeller Synchronization much easier to maintain during climb and cruise
  • Rate of climb = no significant change
  • Cruise speed = no significant change

3. Weight reduction:
  • 60 lbs lighter (30 lbs each)

4. Time between Propeller overhauls
  • Much longer therefore the hourly operating cost is lower
  • 6 years or 2000 hours vs 5 years and 1500 hours

5. Appearance:
  • More Modern and Stately looking

6. In case of propeller strike
  • Much less likely to bend prop flange or break crankshaft
Contact Owen Bell regarding this STC for 3 blade propellers for all Skymasters

Only $18,000
Available now for the first time a pair with ~300 hours total time and 0 time since overhaul
Description
 Price
 Total
2 Bladed McCauley Prop
 $13,000 Plus spinner and bulkhead
 $16,000 each
Spinner
 Front  $973
Rear $2041
Bulkhead
 Front $998
Rear $933
3 Bladed M.T. Propeller
 $15,000 each including new
spinner and bulkhead (includes
shipping from Germany)
$1500 extra for hot front prop
 $30,000 for Frt and Rear
Up to $2,500 trade in value for
each of your 2 bladed props
3 Bladed M.T. Propeller on Front Engine of Skymaster
3 Bladed M.T. Propeller on Rear Engine of Skymaster
Cost
3 Bladed Propellers