Doug,
This is a time when I bet you wish the hull was steel. You certainly do have
an issue and it is clear that bonding to the inner FRP skin won't cut it. My
advice would be to use an aluminum mount made out of bars of 1" wide 5/16"
thick spaced at 1" to 1.250 ". these verticle bars should be welded to a
horizontal plate or a pair of horizontal plates that will accept the
cylinder. The inner skin and foam should be removed and this assembly should
occupy at least 1 square foot of area possibly more. Bond the aluminum
assembly to the outer hull and fiberglass the mount in place out to the
inner hull position.
Steve

"Doug Siddens" wrote in message
news
Looking for opinions on attaching the autopilot's ram bracket to the hull.

Our boat consists of about 9/16" outer FRP, then 1" of foam, then about
1/4" FRP in the area to receive the bracket. The ram can produce about
1500 foot pounds of force. The boat is 47' full keel, 23 tons.

Thanks, Doug