pilot quick calc

notes.md

Desent

Rate of descent standard 3deg

Ground speed * 5 or Ground speed / 2 add zero

Examples:

200 * 5 = 1000fpm

or 200 / 2 = 100 * 10 = 1000fpm

I find dividing by 2 faster then multiplying by 5

TOD standard 3deg

Starting alt – Desired alt = delta feet x 3 = distance in feet / 1000 = NM Add 1 NM for every 10 knot tailwind Add 1 NM for every 10 knots of deceration, for example staring at 230knot and decelerationg to 200knots,add 13 NM

Examples:

20,000ft – 10,000ft = 10,000ft x 3 = 30,000ft / 1000 = 30 NM

Or 10,000 / 100 / 3 = 33.333 NM

1 in 60 Rule

Ground Speed (GS) (knots) / 60 * Climb Gradient (Feet Per Mile)

75 / 60 * 600 = 750ft/min

Distance off track = (number of degrees off course x distance to station) / 60

1nm = (1deg X 60nm) / 60

Maximum drift angle (Max Drift) = Windspeed divided by Groundspeed in miles per minute

10nm / (120nm/h / 60min) = 5deg

Reources:

• https://www.thinkaviation.net/top-of-descent-calculation/
• https://www.skybrary.aero/articles/rules-thumb

Climb

Rate of climb

Ground speed / 60 * Gradiant

75kn/h / 60min * 400ft/kmile = 500ft/m

Resources:

• https://www.cfinotebook.net/notebook/aerodynamics-and-performance/performance-calculations#determining-rate-of-climb-requirements