Brantly 305/Weight and Balance - Revision history

Kelly: /* WEIGHT AND CG CALCULATION */

2021-07-30T17:30:43Z

‎WEIGHT AND CG CALCULATION

Kelly: /* CG ARM DATA */

2021-07-30T17:27:29Z

‎CG ARM DATA

Kelly: /* EMPTY WEIGHT AND CG */

2021-07-30T17:26:18Z

‎EMPTY WEIGHT AND CG

Kelly: /* WEIGHT AND CG LIMITS */

2021-07-30T17:25:59Z

‎WEIGHT AND CG LIMITS

Kelly: Created page with "SECTION 5. WEIGHT AND BALANCE === WEIGHT AND CG LIMITS === The weight and CG limits for this aircraft are: {| class=wikitable |Max Gross Weight..."

2021-07-30T17:25:30Z

Created page with "<span class=sa-section>SECTION 5. WEIGHT AND BALANCE</span> === WEIGHT AND CG LIMITS === The weight and CG limits for this aircraft are: {| class=wikitable |Max Gross Weight..."

New page

<span class=sa-section>SECTION 5. WEIGHT AND BALANCE</span>

=== WEIGHT AND CG LIMITS ===

The weight and CG limits for this aircraft are:
{| class=wikitable
|Max Gross Weight:|| 1670 lb
|-
|Max Forward CG:|| 96 inches
|-
|Max Aft CG:|| 103 inches
|}

=== EMPTY WEIGHT AND CG ===

The empty weight and CG of this aircraft are:

{| class=wikitable
|Empty Weight: ||1109 lb
|-
|Empty Aircraft CG: ||104.7 in
|-
|Empty Moment: ||116112 lb-in
|}

=== CG ARM DATA ===
The following arm data can be used to calculate moment at each of these stations.
{| class=wikitable
|Pilot: ||72.4 in (1.84 m)
|-
|Fuel : ||115.8 in (2.94m)
|-
|Baggage:||159.1 in (4.04m)
|}

=== WEIGHT AND CG CALCULATION ===

Total weight is calculated by adding total weight of empty aircraft, fuel, passengers and baggage. Fuel weight can be calculated assuming 6 pounds per gallon of fuel. The CG is obtained by dividing total moment by total weight. Moment at each station is obtained by multiplying the arm of that station by the weight at that station. Total moment is obtained by adding moment for each station and the moment for the empty aircraft.

As an example, consider a 180 lb pilot, a 160 lb passenger and 25 gallons of fuel. Weight of the fuel will be 25*6=150 lb.

{| class=wikitable
!Item
!Weight
!Arm
!Moment
|-
|Aircraft ||1109 ||104.7 ||116112
|-
|Pilot ||180 ||72.4 ||13032
|-
|Co-Pilot ||160 ||72.4 ||11584
|-
|Fuel ||150 ||115.8 ||17370
|-
|Total ||1599 ||x ||158098
|}

The final CG is calculated by dividing the total moment 158098 by the total weight 1599 yielding 98.9 inches. Cross checking the total weight and CG with the weight/CG limits indicates the aircraft is within limits. The "CG" is also calculated and displayed on the main menu for convenience.

@@ Line 41: / Line 41: @@
 Total weight is calculated by adding total weight of empty aircraft, fuel, passengers and baggage. Fuel weight can be calculated assuming 6 pounds per gallon of fuel. The CG is obtained by dividing total moment by total weight. Moment at each station is obtained by multiplying the arm of that station by the weight at that station. Total moment is obtained by adding moment for each station and the moment for the empty aircraft.
-As an example, consider a 180 lb pilot, a 160 lb passenger and 25 gallons of fuel. Weight of the fuel will be 25*6=150 lb.
+As an example, consider a 180 lb pilot, a 160 lb passenger and 41 gallons of fuel. Weight of the fuel will be 41*6=246 lb.
 {| class=wikitable
@@ Line 49: / Line 49: @@
 !Moment
 |-
-|Aircraft	||1109	||104.7	||116112
+|Aircraft	||1824||125.1	||2282182
 |-
-|Pilot	        ||180	||72.4	||13032
+|Pilot	        ||180	||77.6	||13968
 |-
-|Co-Pilot	||160	||72.4	||11584
+|Co-Pilot	||160	||77.6	||12416
 |-
-|Fuel	        ||150	||115.8	 ||17370
+|Passenger (back)||190	||122.0	||23180
 |-
-|Total	        ||1599	||x	||158098
+|Fuel	        ||246   ||172.8||42509
 |}
-The final CG is calculated by dividing the total moment 158098 by the total weight 1599 yielding 98.9 inches. Cross checking the total weight and CG with the weight/CG limits indicates the aircraft is within limits. The "CG" is also calculated and displayed on the main menu for convenience.
+The final CG is calculated by dividing the total moment 320255 by the total weight 2600 yielding 123.2 inches. Cross checking the total weight and CG with the weight/CG limits indicates the aircraft is within limits. The "CG" is also calculated and displayed on the main menu for convenience.

@@ Line 27: / Line 27: @@
 The following arm data can be used to calculate moment at each of these stations.
 {| class=wikitable
-|Pilot:	||72.4 in (1.84 m)
+|Pilot	||77.6 in (1.97 m)
 |-
-|Fuel :	||115.8 in (2.94m)
+|Rear Seats	||122.0 in (3.10m)
 |-
-|Baggage:||159.1 in (4.04m)
+|Fuel 	||172.8 in (4.39m)
 |}

@@ Line 17: / Line 17: @@
 {| class=wikitable
-|Empty Weight:	||1109 lb
+|Empty Weight:	||1824lb
 |-
-|Empty Aircraft CG:	||104.7 in
+|Empty Aircraft CG:	||125.1in
 |-
-|Empty Moment:	||116112 lb-in
+|Empty Moment:	||228182 lb-in
 |}

@@ Line 5: / Line 5: @@
 The weight and CG limits for this aircraft are:
 {| class=wikitable
-|Max Gross Weight:||	1670 lb
+|Max Gross Weight:||	2900 lb
 |-
-|Max Forward CG:||	96 inches
+|Max Forward CG:||	110 inches
 |-
-|Max Aft CG:||	103 inches
+|Max Aft CG:||	125 inches
 |}