Cubic inches for bow air bag?

Does anyone know the size cubic inches or dimensions of the bow bag one needs to be class legal to race?

I have one from another boat not a Scot but I'm not sure it's b I genough

Comments

Bow bag

Here's the handbook text:

In addition, effective January 1, 2009, the boat shall include a nominal 4.8 cubic feet of buoyancy to facilitate the rescue of a swamped boat. This buoyancy shall be composed of a choice of an air bag, rigid non- communicating air cell foam plastics or air tanks and shall be attached inside the hull at the bow as low and far forward as possible to provide a nominal 300 pounds of buoyancy when submerged in water. It shall be securely fastened so as not to become dislodged when submerged. (November 2007) (See also CMR #29 & 79) 

Here's the kit on Flying Scot Inc Store:

Bow bag kit with cover
480130
4.54 lbs   $ 196.80   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 

Includes the bag, protective cover 
and all parts required for 
installation. (As per current new 
boat installation)

There's also one at APS on this page:

http://www.apsltd.com/c-3014-flying-scot-hardware-and-accessories.aspx

Phil Scheetz

FS 4086

Fleet 163, Nockamixon Sail Club