aeviaanah
Well-known member
First I figured sq inches of under seats. I left half of the back seat open for storage.
The first equation represents the rectangular portion of the seat, the second is the slanted area on edges of seat near side of boat. Each side is roughly half of a rectangular box. This helped get a better estimate of total sq inches.
Front seat -
10 x 9.5 x 34= 3230 sq in
7.5 x 4 x 9.5 = 285 sq in
Middle seat
10 x 9.5 x 42 = 3990 sq in
9.5 x 6 x 9.5 = 541 sq in
Half of back seat
9.5 x 9.5 x 20.5 = 1850 sq in
(9 x 6 x 9.5)/2 = 256 sq in
After adding all together I come up with 10, 152 sq inches. I divide by 1728 to convert to sq ft. I come up with 5.87 sq ft. Since the foam is not a perfect fit I will go down to 5.5 cubic ft of foam.
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Now on to the total weight of boat. I have a 12' aluminum mod V. Similar models were between 140 and 160 lbs.
Boat weight empty
160lbs x (alum. factor .63) = 100 lbs.
Weight of motor 115lbs
Swamped = 105lbs
Weight of battery 45lbs
Submerged = 25lbs
Gear etc 100lbs
*I didnt figure weight of 6.6gal gas tank as they say gasoline is lighter than water so it will float.
Add all this up we get a total of 330lbs. Now i factored in the wood on boat.
I have 50 lbs of plywood.
50 (factor -.81)= -40lbs
330 - 40 = 290lbs.
To figure amount of flotation in cubic ft I took 290 and divided by 60.3. I come up with 4.80 cubic ft of foam required for boat weight.
I didnt figure in weight of persons as I just dont have enough room for foam...anyone who I take will need to be good at swimming and we do have life jackets. What do you guys think did I figure this properly?
5.5 cubic ft of foam in boat.
4.8 cubic ft of required to float boat.
The first equation represents the rectangular portion of the seat, the second is the slanted area on edges of seat near side of boat. Each side is roughly half of a rectangular box. This helped get a better estimate of total sq inches.
Front seat -
10 x 9.5 x 34= 3230 sq in
7.5 x 4 x 9.5 = 285 sq in
Middle seat
10 x 9.5 x 42 = 3990 sq in
9.5 x 6 x 9.5 = 541 sq in
Half of back seat
9.5 x 9.5 x 20.5 = 1850 sq in
(9 x 6 x 9.5)/2 = 256 sq in
After adding all together I come up with 10, 152 sq inches. I divide by 1728 to convert to sq ft. I come up with 5.87 sq ft. Since the foam is not a perfect fit I will go down to 5.5 cubic ft of foam.
__
Now on to the total weight of boat. I have a 12' aluminum mod V. Similar models were between 140 and 160 lbs.
Boat weight empty
160lbs x (alum. factor .63) = 100 lbs.
Weight of motor 115lbs
Swamped = 105lbs
Weight of battery 45lbs
Submerged = 25lbs
Gear etc 100lbs
*I didnt figure weight of 6.6gal gas tank as they say gasoline is lighter than water so it will float.
Add all this up we get a total of 330lbs. Now i factored in the wood on boat.
I have 50 lbs of plywood.
50 (factor -.81)= -40lbs
330 - 40 = 290lbs.
To figure amount of flotation in cubic ft I took 290 and divided by 60.3. I come up with 4.80 cubic ft of foam required for boat weight.
I didnt figure in weight of persons as I just dont have enough room for foam...anyone who I take will need to be good at swimming and we do have life jackets. What do you guys think did I figure this properly?
5.5 cubic ft of foam in boat.
4.8 cubic ft of required to float boat.