CESSNA SKYMASTER PROPELLERS

Upgrade to a 3-blade propeller or replace your existing prop for performance, longevity, and noise reduction

3-Blade Versus 2-Blade Propellers Flight Tests

Performed on January 25, 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

RESULTS:
3 Bladed M.T. Props showed significant advantages vs 2 Bladed McCauley Props

Noise Reduction at the same power settings

• 1 Decibel less noise during Taxi

• 3 Decibel less noise during Climb

• 4-5 Decibel less noise during cruise at 6500 ft

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

Weight reduction

• ~20 lbs lighter (~10 lbs per propeller)

Time between propeller overhauls

• Significantly longer (thus reducing the hourly operating costs)

• 6 years or 2000 hours vs 5 years and 1500 hours

Appearance

• Upgraded, modern, and stately

In case of propeller strike

• Increased safety and less potential damage

• Less likely to bend prop flange or break crankshaft

Summary: 3-Bladed M.T. Propellers were flight tested and compared to 2-Bladed McCauley Propellers and found to significantly reduce weight, noise, and ground roll time to take-off. There was no significant change found in rate of climb or cruise speed. Overhauls are needed less frequently (every 6 years/2000 hrs vs 5 years/1500 hrs) thereby reducing overall operating costs. In addition, the 3-Bladed props are less prone to bend or breakage in case of propeller strike therefore increasing safety and decreasing potential other damage.