Ventral fairing for an aircraft

A ventral fairing arrangement comprising:

• a left wing having a left lower surface;
• a right wing having a right lower surface;
• and
• a ventral fairing having
• a central convex transverse cross-section located between the left lower surface and the right lower surface,
• a left lateral concave transverse cross-section located between at least part of the left lower surface and the central convex transverse cross-section, and
• a right lateral concave transverse cross-section which is located between at least part of the right lower surface and the central convex transverse cross-section,
• wherein the angle between the ventral fairing and the left lower surface is less than 90° and the angle between the ventral fairing and the right lower surface is less than 90°,
• wherein a first left point of inflection is formed between the left lower surface and the left lateral concave transverse cross-section and a first right point of inflection is formed between the right lower surface and the right lateral concave transverse cross-section,
• wherein a second left point of inflection is formed between the left lateral concave transverse cross-section and the central convex transverse cross-section and a second right point of inflection is formed between the right lateral concave transverse cross-section and the central convex transverse cross-section,
• wherein the ventral fairing further has a forward section, and a rear section, and
• wherein the left lateral concave cross-section and the right lateral concave cross-section are progressively reduced in size in a direction away from the forward section toward the rear section such that the left lateral concave transverse cross-section and the right lateral concave transverse cross-section are eliminated at the rear section.

A ventral fairing for use attached between a left lower wing surface and a right lower wing surface, the ventral fairing having:

• a central convex transverse cross-section;
• a left lateral concave transverse cross-section;
• and
• a right lateral concave transverse cross-section,
• wherein the left lateral concave transverse cross-section is configured such that, when the ventral fairing is attached between the left lower wing surface and the right lower wing surface, an angle of less than 90° is formed between the ventral fairing and the left lower wing surface,
• wherein the right lateral concave transverse cross-section is configured such that, when the ventral fairing is attached between the left lower wing surface and the right lower wing surface, an angle of less than 90° is formed between the ventral fairing and the right lower wing surface,
• wherein the left lateral concave transverse cross-section is configured such that, when the ventral fairing is attached between the left lower wing surface and the right lower wing surface, a first left point of inflection is formed between the left lower wing surface and the left lateral concave transverse cross-section,
• wherein the right lateral concave transverse cross-section is configured such that, when the ventral fairing is attached between the left lower wing surface and the right lower wing surface, a first right point of inflection is formed between the right lower wing surface and the right lateral concave transverse cross-section,
• wherein a second left point of inflection is formed between the left lateral concave transverse cross-section and the central convex transverse cross-section and a second right point of inflection is formed between the right lateral concave transverse cross-section and the central convex transverse cross-section,
• wherein the ventral fairing further has a forward section, and a rear section, and
• wherein the left lateral concave cross-section and the right lateral concave cross-section are progressively reduced in size in a direction away from the forward section toward the rear section such that the left lateral concave transverse cross-section and the right lateral concave transverse cross-section are eliminated at the rear section.