Pre-Flight Weight & Balance

Robinson R-44 Raven II · live CG envelope check · planning use only

Enter your loading below. Weights compute live; the CG envelope check turns green when you're inside the Robinson published envelope. Fuel is capped at 30 US gallons per NCHF operational practice.

Empty aircraft

Empty weight

(from aircraft W&B sheet)

—

Empty long CG

in. (POH sample 106.5)

—

Empty lateral CG

in. (R = +, L = −)

—

Front seats

Pilot

arm 49.5"

—

Front passenger

arm 49.5"

—

Rear seats

Right rear

arm 79.5"

—

Left rear

arm 79.5"

—

Cargo (under-seat)

arm 44"

—

Fuel (max 30 gal)

Main fuel

arm 106.0" · 6 lb/gal

—

NCHF op limit: never depart with more than 30 gal main-tank fuel. The calculator enforces this cap. (R-44 Raven II main tank usable: 29.5 gal; 30 gal here treats the tank as topped to its operational max.)

Gross weight — —

Lateral CG —

Enter loading to see envelope check.

CG envelope (longitudinal)

In envelope Current loading Max GW 2500 lb

Lateral CG (looking forward)

Conservative ±3.0" lateral check. The POH §2 lateral envelope narrows at longitudinal CG extremes — refer to the POH chart for the exact coupled limit.

Reference arms (Raven II)

Item	Long	Lat
Pilot (right front)	49.5"	+12.2
Front passenger (left)	49.5"	−10.4
Right rear	79.5"	+12.2
Left rear	79.5"	−12.2
Cargo (R rear)	44"	+11.5
Main fuel (6 lb/gal)	106.0"	−13.5
Aux fuel	102.0"	+13.0

Lateral: + = right of centerline · − = left.

Envelope corners (POH §2)

1500–2100 lb: 92.5" – 102.0"
2350 lb: 92.5" – ~101.0"
2400 lb: ~93" – 100.0"
2500 lb: 95.0" – 99.5"

Note: with full main fuel, more-fwd CG required so that as fuel burns off the load stays in envelope.

Planning use only. This calculator implements the Robinson R-44 Raven II published envelope and standard arms but is not a substitute for the Pilot Operating Handbook (POH) Section 6 weight & balance for your specific airframe. The Pilot in Command is responsible for the actual W&B prior to every flight, using the empty-weight figures from the most recent aircraft weighing and the actual passenger weights. Always confirm against the POH before takeoff.

📄 Open printable blank worksheet or

The blank worksheet is for students to bring to the airport and fill in by hand. The "print this page" option captures whatever you've entered above, including the envelope chart with your loading dot.