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 Unlimited -- Recent Daily Episodes

Episode Date

Monday

Tuesday

Wednesday

Thursday

Friday

Airborne On ANN

Airborne 06.29.15

Airborne 06.30.15

Airborne 07.01.15

Airborne 07.02.15

Airborne 07.03.15

Airborne Hi-Def On YouTube

Airborne 06.29.15

Airborne 06.30.15

Airborne 07.01.15

Airborne 07.02.15

Airborne 07.03.15

 

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 07.03.15: New Trig Avionics, Cargo Biz Grows, iOS GPS Fix

Also: 'No Drone Zone', Aviation v Media, Women's Air Race Classic, Houston Spaceport, Navy's New A/C Launch System, GA Fly Safe, FAA InFO Trig Avionics tells us they are unveiling >[...]

Airborne 07.03.15: New Trig Avionics, Cargo Biz Grows, iOS GPS Fix

Also: 'No Drone Zone', Aviation v Media, Women's Air Race Classic, Houston Spaceport, Navy's New A/C Launch System, GA Fly Safe, FAA InFO Trig Avionics tells us they are unveiling >[...]

Airborne 07.02.15: Bell 525 Flies!, Archer DX Delivers, Boss 182 Upgrade

Also: Wingfoot@AirVenture, Airbus On Pilot Training, XPrize, EFD1000H PFD For Bell, Atlanta Warbird Weekend, Lee Bottom Flying Field, Air Canada/Unifor, National Air Cargo Fined Ju>[...]

ANN FAQ: Getting The Most Out Of ANN's Newsletters

ANN goes through a lot of trouble to make the graphics flashy and cool and an integral part of the story. But let's face it, they're bandwidth-intensive. So here are a couple of th>[...]

Aero-News: Quote Of The Day (07.04.15)

"When presented with a passenger carrying a large sum of money through the screening checkpoint, the TSA officer will frequently engage in dialog with the passenger to determine wh>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

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