Flight Planning Tool | Yohann Aviation Note

Step 1 · Calculate wind at target altitude by GPWT (You can skip this and go straight to Step 2)

Altitude block A

Altitude 1 ft

Wind dir 1 (M · from) °

Wind spd 1 kt

Altitude block B

Altitude 2 ft

Wind dir 2 (M · from) °

Wind spd 2 kt

Target altitude ft

Prefer an altitude between A and B; if out of range, result will be an extrapolation.

Wind dir at target (M · from)

—

Wind spd at target

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Note: This page does not provide a direct True→Magnetic conversion. Doing the mental math for True→Magnetic during planning helps build robust habits (variation/deviation contexts often cause errors). Practice it deliberately 😉

Step 2 · TRK + wind → MH & GS (Pre-fills from Step 1 when available; you can overwrite here)

Leg template: TAS template:

TRK (magnetic) °

TAS kt

Wind dir (M · from) °

Pre-filled from Step 1; editing here clears Step 1.

Wind spd kt

MH (magnetic heading)

—

GS (ground speed)

—

Step 3 · ETI (Estimated Time Interval)

DIST links to the leg template; manual edits will clear the selection.

DIST nm

ETI

—

Formula: ETI = DIST / GS × 60

Step 4 · Trip fuel

Fuel flow template (DA40NG default):

Fuel flow L/h

Trip fuel

—

Trip fuel = ETI / 60 × Fuel flow (rounded up to whole litres)

Step 5 · Summary

TRK (M)	Wind	HDG (M)	GS	DIST	ETI	Trip fuel
—	—	—	—	—	—	—

Wind example format: 340M/06kt