On /Web_Page/PropRotor Pros & Cons Item PropRotor Pros & Cons

DESIGN: XXX PropRotor Pros & Cons VS. Coaxial ABC Helicopter and 6TiltRotor

Overview:

An initial and crude comparison of the PropRotor to the Coaxial ABC and the TiltRotor, to see how it fits in.

What am I looking for?

A relatively low disk loading in hover?

A relatively high induced velocity in cruise?

the Helicopter <- - - - - -> the Tiltrotor <- - - - - -> the Airplane;

Hover <- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -> Speed

Where will the ABC-Coaxial, the ABC-Intermeshing, the ABC-Interleaving, the Variable Diameter Tiltrotor, & the PropRotor fit in????

Notes:

 

 

Helicopter w/ Main & Tail Rotors

Helicopter - Coaxial ABC

TiltRotor

PropRotor:

PropRotor:

Flying Wing

Airplane

Airplane

Airplane

 

 

Robinson R22

Sikorsky - X2 (1)

Eagle Eye - UAV

AeroVantage 1x2

AeroVantage 2x4

Northrop N-1M

Midget Mustang

Mustang II:

Super Falco:

 

Gross Weight:

1,370 lb

7,218 lb

2,250 lb

1,325 lb

1,325 lb

3,900 lb

1,100 lb

1,600 lb

1,808 lb

 

Hover:

 

 

 

 

 

 

 

 

 

 

Rotor Diameter:

25.33 ft

34.8 ft

9.5 ft

5.5 & 5.0 ft

7.58 ft

 

 

 

 

 

Disk Area - Hover:

504 ft2

951 ft2 (4)

141.8 ft2

173.6 ft2 (2)

177 ft2 (2)

 

 

 

 

 

Disk Loading - Hover:

2.71 lb-ft2

7.6 lb-ft2 (4)

15.9 lb-ft2

7.6 lb-ft2

7.5 lb-ft2

 

 

 

 

 

Disk Loading - Hover Adjusted: (5)

2.71 lb-ft2

7.6 lb-ft2 (4)

17.5 lb-ft2 (5)

7.6 lb-ft2

7.5 lb-ft2

 

 

 

 

 

Cruise:

 

 

 

 

 

 

 

 

 

 

Wing or Disk Area - Cruise:

504 ft2

951 ft2 (4)

+ /- 40.0 ft2

106 ft2 ?

106 ft2 ?

300.0 ft2

 

97.1 ft2

107.5 ft2

 

Wing or Disk Loading - Cruise: (7)

2.71 lb-ft2

7.6 lb-ft2 (4) (6)

56.0 lb/ft2

12.5 lb/ft2 ?

12.5 lb/ft2 ?

13.0 lb/ ft2.

14.7 lb/ ft2.

16.5 lb/ ft2.

16.8 lb/ ft2.

 

Propulsor Area:

0.0

59 ft2 (1)

141.8 ft2

88.5 ft2 (3)

88.5 ft2 (3)

 

 

 

 

 

Propulsor GW/Area ??

 

122.3 lb-ft2

15.9 lb-ft2

15.0 lb-ft2

15.0 lb-ft2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cruise speed:

102 kts - never exceed

250 - 265 kts

200 kts TAS

?

?

200 mph

215 mph

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dimensions:

 

 

 

 

 

 

 

 

 

 

OA Length:

28.66 ft

> 34.8 ft

18' - 3"

 

 

 

 

 

 

 

OA Width

25.33 ft

34.8 ft

24' - 2" (wings 15.2 ft)

25.0 ft

28.7 ft

 

 

 

 

 

Miscellaneous:

 

 

 

 

 

 

 

 

 

 

Engine:

124 hp

1,450 SHP

420 SHP

160 HP

160 HP

2*65=130 hp

260 hp

 

 

 

GW/Power

10.5 lb/hp

4.5 lb/hp

5.4 lb/hp

8.3 lb/hp

8.3 lb/hp

30.0 lb/hp

 

 

 

Notes:
    1. From; OTHER: Helicopter - Outside - Coaxial - Sikorsky ~ X2
    2. The sum of the 2 or the 4 PropRotors
    3. The sum of the 2 coaxial arraigned PropRotors
    4. Scaled from picture(s). This does not make any reduction for the large cut-out at the root end of the blades.
    5. This does not take into account the 10% downwash lost on the wings. (10% figure comes from Leishman re. V22).
    6. This does not take into account the higher velocity on the advancing blades and the minimal velocity on the retreating blades.
    7. The Midget Mustang's wing loading is 14.7 lb/ft2

This information is partially on DESIGN: AeroVantage ~ Fuselage - Wing - 2x4 - General ~ 1725.html

And partially on

DESIGN: AeroVantage ~ PropRotor - Outside Information - General Overview

Notes:

xx

Outside Information:

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Last Revised: May 22, 2009