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

Most Recent Daily Airborne

Airborne On ANN

Airborne On YouTube/Hi-Def/Mac Friendly

Monday

Airborne 01.26.15

Airborne 01.26.15

Tuesday

Airborne 01.27.15

Airborne 01.27.15

Wednesday

Airborne 01.28.15

Airborne 01.28.15

Thursday

Airborne 01.29.15

Airborne 01.29.15

Friday

Airborne 01.30.15

Airborne 01.30.15

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

Airborne 01.30.15: SpaceShipTwo Test Update, Google Lunar, CAF Hall Of Fame

Also: XL-2 Returns, DJI Disables, Barnstorming On Aero-Community, Prop STC, Elon Musk, Mars-Copter Since its inception, Virgin Galactic has worked with Scaled Composites to build a>[...]

ANN's Daily Aero-Linx (01.31.15)

Association of Air Medical Services The Association of Air Medical Services (AAMS), based in Alexandria, Va., is the only trade association serving the entire air and ground medica>[...]

ANN's Daily Aero-Term (01.31.15): No Gyro Approach

A radar approach/vector provided in case of a malfunctioning gyro-compass or directional gyro.>[...]

Aero-News: Quote Of The Day (01.31.15)

“I’m grateful to my staff, many supporters, suppliers and the Heriot Watt Research Park team who are here to celebrate our official opening today." Source: Trig Avionic>[...]

ANN FAQ: ANN's News Portal Syndication Program

Get A Customized ANN News Portal For YOUR Website! As we promised, the ever-so-busy software geeks at ANN have been working overtime on a number of cool new tools and toys... and t>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2015 Web Development & Design by Pauli Systems, LC