Carter Slowed-Rotor VTOL Demonstrates Impressive Lift-To-Drag Values | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

** Airborne 08.20.14 ** HD iPad-Friendly -- Airborne 08.20.14 **
** Airborne 08.18.14 ** HD iPad-Friendly -- Airborne 08.18.14 **
** Airborne 08.15.14 ** HD iPad-Friendly -- Airborne 08.15.14 **

Fri, Dec 21, 2012

Carter Slowed-Rotor VTOL Demonstrates Impressive Lift-To-Drag Values

Four-Place VTOL POC Aircraft Continuing Test Flights

Carter Aviation Technologies ... working in conjunction with Carter Aerospace Development ... says it has made significant progress as performance flight-testing of its current Slowed-Rotor/Compound (SR/C) prototype, the Proof of Concept demonstrator (the “POC”), continues. The POC is a variant of the company’s four passenger vertical takeoff and landing (VTOL) aircraft, known as the 4-Place PAV.

According to the company, the POC is continuing to expand the high speed/slowed rotor envelope. During performance flight-testing in November, the aircraft flew with the rotor slowed to 106 rpm. The company says that by significantly slowing the rotor rpm to less than half that of a comparably-sized helicopter, the aircraft demonstrated a lift-to-drag (“L/D”) value of 12 – around two-and-a-half times better than the most efficient helicopters.

L/D is a measure of the efficiency of an aircraft (lift or weight divided by drag or thrust). Higher L/D ratios are directly related to enhanced speed, fuel economy, climb performance, and glide ratio.
 
The flight also resulted in an advance ratio of 0.85. The advance ratio is calculated by dividing the forward airspeed of the aircraft by the tip speed of the rotor. As the rotor rpm (i.e., the tip speed) is reduced, the advance ratio increases. As the advance ratio increases, drag on the rotor decreases dramatically, resulting in increased efficiency.
 
Carter Aviation Technologies says that these key achievements clear the way for the POC to achieve speeds in excess of 200 knots at 25,000 feet and 350 HP with the current test weight of 3,950 lbs. Additionally, the POC has proven its VTOL capability, achieved speeds in excess of 140 knots on 200 HP and an altitude of 12,000 feet.
 
The company will continue to expand the high speed/slowed rotor envelope at ever-increasing altitudes, and will gather more data on flight efficiencies under those conditions.

(Photo provided by Carter Aviation Technologies)

FMI: www.cartercopters.com/

Advertisement

More News

Barnstorming: Time Flies...

In Fond Remembrance Of My Dear Vicki, Five Years Since Her Loss Hi Folks... In the last five years, you and I have been through a lot. We've watched the fortunes of the aviation wo>[...]

Aero-TV: Honoring Our Legacy - Recrafting Paul’s Game-Changing Baby Ace

A Bit Of History Lovingly Restored To The Sport Aviation World ANN's Michael Maya Charles had to search around at EAA AirVenture 2014 to find this story. The Aeroplane Factory buil>[...]

ANN's Daily Aero-Linx (08.22.14)

International Fellowship of Flying Rotarians The International Fellowship of Flying Rotarians (IFFR) is a group of Rotarians dedicated to promoting Rotary and aviation as an opport>[...]

ANN's Daily Aero-Term (08.22.14): Feeder Facilities

Used by ATC to direct aircraft to intervening fixes between the en route structure and the initial approach fix.>[...]

Aero-News: Quote Of The Day (08.22.14)

"We pause to remember the life and legacy of an American hero. Bernie's life is an inspiration to those who met him and to all Airmen who will continue to hear his story. Source: C>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2014 Web Development & Design by Pauli Systems, LC