Struct TubeFinSet 

pub struct TubeFinSet {
    pub count: u32,
    pub length_m: f64,
    pub outer_radius_m: f64,
    pub thickness_m: f64,
    pub base_angle_rad: f64,
    pub material: Material,
}

Tube fins: open tubes parallel to the body, touching it, spaced evenly around it.

Fields

count: u32

Number of tubes, 1 to 64 (TubeFinSet::MAX_COUNT).

length_m: f64

Length, m.

outer_radius_m: f64

Outer radius, m.

thickness_m: f64

Wall thickness, m.

base_angle_rad: f64

Roll angle of the first tube’s axis from x_B toward y_B, rad.

material: Material

Material (bulk).

Implementations

impl TubeFinSet

pub const MAX_COUNT: u32 = 64

The most tubes a set may have: as FinSet::MAX_COUNT, a bound on the bodies its mass properties build one by one, far above any rocket’s (the most tubes in one set among the .ork designs read is 6, a one-off count over 78 designs, not a committed survey).

pub fn closing_radius_m(body_radius_m: f64, count: u32) -> f64

The outer radius of count tubes that close the ring around a body of radius body_radius_m, each touching the body and its two neighbours, which is the radius OpenRocket 24.12 gives a tube fin set written auto (ADR-098).

The axes of N tubes of radius r sit on a circle of radius R + r, 2π/N apart, so neighbouring axes are a chord 2(R + r) sin(π/N) apart. Touching means that chord is 2r:

r = R sin(π/N) / (1 − sin(π/N)).

For one or two tubes sin(π/N) is 0 or 1 and no finite ring closes; OpenRocket 24.12 gives those the body’s radius, measured on its probes on 20 and 50 mm bodies, and so does this; so does a count of none, which Self::mass_properties refuses. On a 50 mm body, six tubes are 50 mm (sin(π/6) = 1/2), four are 120.7 mm and eight are 31.0 mm.

pub fn mass_properties( &self, body_radius_m: f64, ) -> Result<MassProperties, DesignError>

Mass properties in the set’s frame (origin on the body axis at the tubes’ forward end), on a body of radius body_radius_m. Each tube is a hollow cylinder, I_a = m(R² + r²)/2 and I_t = m((R² + r²)/4 + L²/12), with its axis at R_b + R.

Errors

DesignError::Domain for a bad dimension, or a count of none or more than Self::MAX_COUNT (what is "tube fin count (1 to 64)"), DesignError::Geometry for a wall thicker than the radius, and material errors.

Trait Implementations

impl Clone for TubeFinSet

fn clone(&self) -> TubeFinSet

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TubeFinSet

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TubeFinSet

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for TubeFinSet

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for TubeFinSet

fn eq(&self, other: &TubeFinSet) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for TubeFinSet

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TubeFinSet