High Performance. Low Noise.

Make every flight a great flight with the Whisper Prop® propeller system.

Whisper Prop is a five-blade, small diameter, carbon fiber propeller with a natural composite core for superior noise dampening. Developed in conjunction with *MT-Propeller, the BLR Aerospace Whisper Prop incorporates advanced computer design to deliver an ultra-lightweight result.

Installing Whisper Prop on your King Air will enhance performance and send cabin comfort soaring with unprecedented levels of quiet and a smooth, low-vibration flying experience. A smaller diameter equates to greater ground clearance, reduced vacuum effect, and less resulting FOD.

*MT-Propeller is the industry leader in design and production of high performance and noise reducing propeller systems with more than 18,000 systems flying worldwide and over 60,000 blades in service. Read more about MT-Propeller here.

Performance Highlights

reduction in noise and vibration*


diameter with a natural composite core

(Based on King Air 90 Model)
Whisper Prop is available for:

Click below to download available performance charts. Please contact BLR directly for more information on those that are still under development.

King Air 90 Series

  • King Air 90-Under Development

King Air 200 Series

  • King Air 200-Under Development
  • King Air 250-Under Development
  • King Air B200GT-Under Development

King Air 300 Series

  • King Air 300-Under Development
  • King Air 350-Under Development
Whisper Prop Media
Featured Package

Whisper Prop + Winglets

Performance gains are even higher when Whisper Prop is paired with BLR Winglets. Together, this powerful package comes with a certified Flight Manual Supplement verifying superior performance when compared to the factory 90GTx and 200 performance manuals.

Operators can now enjoy the short-field performance and interior space of a King Air with comfort surpassing the comparatively space-limited entry-level business jet – all while flying an aircraft they already own.

Learn more about Winglets here.

  • *30-50 percent reduction in measured dB, depending on frequency, when compared to the factory standard propeller
  • Runway length reductions up to 33 percent
  • Access to shorter fields, reduced trip times, greater safety margins
Whisper Prop + Winglets are available for:
Request More Information
Whisper Prop® Brochure
Where To Buy

Locate your nearest Whisper Prop Dealer.


Contact a BLR performance expert
Mike Sela
(425) 405-4776

Read what our customers have to say about Whisper Prop®

“This is an amazing improvement in comfort!”

-Capt. Jim, Flight Test Pilot, DER

The props are beautiful. They are also definitely quieter, with a clear reduction in noise and vibration.”

-George Moussa, President of Ambella Home

“This airplane feels more like a turbofan than a turboprop.”

-Capt. Paul, ATP Contract Pilot