Struct DragQuery 

pub struct DragQuery<'a> { /* private fields */ }

What a DragModel is asked: the flow and the drag conditions, with the rocket’s reference area, its length and hpr’s own drag buildup at hand. Made by AeroModel::drag; to try a model on its own, give it to an AeroModel and ask that for its drag.

Implementations

impl<'a> DragQuery<'a>

pub fn flow(&self) -> &Flow

The flow: Mach number, angle of attack and roll. The coefficient asked for is the zero-lift one whatever the angle of attack; hpr scales it for the angle itself.

pub fn mach(&self) -> f64

The Mach number, as a shorthand for flow().mach: finite and not negative.

pub fn conditions(&self) -> &DragConditions

The drag conditions: the Reynolds number per meter, and whether a motor is thrusting, which a model with a power-on curve reads. They are as hpr’s buildup reads them: under AeroModel::with_full_base_drag_under_power the thrusting motors’ areas are zero.

pub fn reference_area_m2(&self) -> f64

The area the coefficient is on: the rocket’s reference area, m².

pub fn length_m(&self) -> f64

The rocket’s length, nose tip to the aft end of its last body component, m: the length hpr’s buildup takes the Reynolds number on.

pub fn buildup(&self) -> Result<Drag, AeroError>

hpr’s own drag buildup at this flow and these conditions (AeroModel::buildup_drag): what the flight would have used without the model.

Errors

As AeroModel::buildup_drag: among others, AeroError::Mach at Mach 5 and faster, where the buildup ends.

pub fn buildup_components(&self) -> Result<Vec<ComponentDrag>, AeroError>

hpr’s own drag buildup at this flow, component by component (AeroModel::buildup_components).

Errors

As AeroModel::buildup_components.

Trait Implementations

impl<'a> Clone for DragQuery<'a>

fn clone(&self) -> DragQuery<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for DragQuery<'a>

impl Debug for DragQuery<'_>

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

The question, without the rocket’s whole model.