Item 1518

OTHER: Helicopter - Inside - Intermeshing - Pros & Cons vs. ABC Coaxial

Coaxial Intermeshing

Advantages of Intermeshing:

Coaxial:

Advantages of Coaxial:

Quotations from 'Implications of the Low Tip Speed Design Philosophy' by the rotorcraft aerodynamist Wieslaw Stepniewski:

Crudely clipped from PPRuNe posting and Modified for Intermeshing Configuration.

Why the Intermeshing is more convenient for unprepared landing sites than the Coaxial is;

Based on the Boeing 737-700 criteria.

Coaxial rotors with a disk area of 522 sq-ft. fits in a square of 26 x 26 = 666 sq-ft.
Intermeshing rotors with a disk area of 522 sq-ft. fits in a rectangle of 22.5 x 20 = 450 sq-ft.

The above does not include the fuselage.

Temporarily copied from Tilt-rotor vs Interleaving 1505.html: May adapt to Coaxial in future.

 

Individual Twin Disk:

Intermeshing Twin Disks:

Interleaving Twin Disks:

Tilt-rotor V-22

Radius of Individual Disk:

10

10

10

10 [19.04 1]

Stagger:

~

2.5

11

11 [46.58 1]

Total Area of Disks:

314.3

628.6

628.6

127.3 [9114.8 1]

Area of Overlap (Circular Segments):

~

284.1

107.1

~

Area Excluding Overlaps:

314.3

344.5

521.5

127.3 [9114.8 1]

Total Lateral Span:

20.0

22.5

31.0

20 [84.55 1]

Total Longitudinal Span:

20.0

20.0

20.0

9 [76.16 1]

Additional Advantages:

Intermeshing Information - Coaxial ABC versus Intermeshing ABC

OTHER: Aerodynamic - Rotor Disk - Dual Configuration - Intermeshing ~ Advantages

Pros & Cons ~ Specifically for Electrotor~MicroLite Consideration: Coaxial v.s. Intermeshing v.s. Side-by-Side

Pros for Coaxial v.s. Intermeshing:

Cons for Intermeshing v.s.Coaxial:

 

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Last Revised: November 3, 2009