MT-Propeller Entwicklung GmbH has received the FAA STC SA04460NY for the Quiet Fan Jet composite 5- blade propeller MTV-27-1-E-C-F-R(G)/CFR224-55( ) on the Cessna 441 powered by two Honeywell TPE-331-8 propeller turbines or TPE-331-( ) installed per approved STCs which do not exceed 635.5 SHP and 2000 rpm.
This installation is already certified by EASA STC 10070901.
MT-Propeller Vice President Martin Albrecht says the installation feature the following advantages:
- Bonded on wide chord nickel alloy leading edges for superior erosion protection of the blades.
- Smaller diameter of up to 4 inch compared to the original propeller, this means more ground clearance of about two inch for less FOD and also more clearance to the fuselage, therefore less cabin noise from the prop tips.
- Take-Off improvement up to 15 percent, so compared to the original AFM a higher safety for the calculated take-off run.
- No propeller ADs
- TBO 4500 hours or six years, whatever comes first, for low maintenance costs.
- No intermediate inspections are needed between the TBO which requires the propeller removal.
- Reduced cost for spare parts, like blades and lower overhaul costs, for the complete propeller assembly.
- No rpm restriction for the complete operational range.
The long-time proven MT-Propeller natural composite blades provide significant inside and outside noise reduction.
There is no life limitation of the blades and they are repairable in case of an FOD
The MT-Propeller natural composite blades provide best vibration damping characteristics for almost vibration free propeller operation.
