Flight Metrics (Glide Ratio) – Widget

[Dmytro Prodchenko]

Description

Android task osmandapp/OsmAnd#16968

To Do

Glide ratio is the horizontal distance divided by change in altitude. I. For example, if my handglider has a glide ration of 7:1 (7 to 1), then for each foot of altitude lost I travel forward 7 feet.
https://en.wikipedia.org/wiki/Lift-to-drag_ratio#Glide_ratio

Widget group

Screenshot

• Add new widget group Flight Metrics, with two widgets:

Glide ratio to target, Figma

Screenshot

Main screen	Mode	Map

• Name – Glide ratio to target, glide_ratio_to_target
• • Icon widget_glide_ratio_to_target
• • Description – Shows the glide ratio needed to reach the target point., map_widget_glide_target_desc

Modes

• Glide ratio to target
• • Should show glide ratio to first map marker.
• • Formatting: 7.4 : 1. (7,4 units of distance forward for each unit of descent)
• • If selected add description – First map marker will be used as target.

• Target elevation
• • Show elevation of target object, for example 320 m
• • Name on map – Target elevation
• • If selected add description – Terrain map (3D) is needed for retrieving elevation for target.

Average glide ratio, Figma

Screenshot

Average glide ratio	Mode	Interval

• Should show glide ratio over configurable interval
• Description – Shows the average glide ratio or vertical speed for the set interval..

Modes

• Average glide ratio
• • Show average glide ratio over configurable interval
• • Icon widget_glide_ratio_average
• Average vertical speed
• • Show average vertical speed over configurable interval
• • Icon - widget_vertical_average_speed

Interval

• The same set of values as for Average speed widget

[Dmytro Prodchenko]

Review

Screenshot

Terrain – off	Terrain – on

• Target elevation should work if Terrain maps is present, not depended on Terrain or 3D Relief options status
• Show – instead of -19 999

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Screenshot

GlideRation.mov

• Tap on widget (top/bottom) work with lag? Glide ratio to target
• Implement vertical speed

[vshcherb]

Special values

+-0:1 - You over/under the point destination
0:0 - You on the point of destination
+1:0 - You and target on the same altitude

> 200:1 -> 1:0
< -200:1 -> -1:0

[DmitrySvetlichny]

#3578

[vshcherb]

• Wrong speed in simuation
• If no altitute in point : glide ratio is '-' and target elevation '-' ( 1) widget dissapears if no marker on click 2) outputs wrong numbers if marker is set)
• Glide ratio should be positive on descent !
• Average vertical speed unit (only m/s or ft/s)
• Can't have 2 separate widgets
  

[vshcherb]

• Wrong calculation = 199000/(10999-382) = 18.74

[vshcherb]

• 3D relief is on