Over a year ago I started this thread:https://www.cruisersforum.com/forums...ts-238168.html
The title is not appropriate for the following question proposed here, but the photos and some suggestions are applicable. Having only worked on old boats with lagbolts screwed into wet soggy glassed in lumber
I found this fiberglass engine bed
to be quite an improvement on my new project boat
. But, it had to be cut out to remove the fuel tank
This is the engine bed
before it was cut apart to remove the fuel tank
Here we see tank removed and the engine bed bridge structure cut apart:
but imagine 8 or 10 on each side.
On one photo
I drew buttress like supports (green).
Buttress might not be the term. It surely is not a flying buttress. I dislike the term “sinking buttress”. Web? Fillet? Open to suggestions.
Maybe just 3 on each side, as shown. Maybe 8 or 10.
I can not say i like the idea but Occam would agree it is the simplest and most recommended by salty and the non-salty handymen not stuck in a paradigm. It still allows through bolted bolts, not lag bolts. It preserves a position/location exactly where the old one was. Surely faster than some alternative ideas i had. But maybe not ideal and maybe not as good as some rattling in "your
" brain. I am open to alternatives.
Most engine companies advise one bolts angle aluminum
to the medial side of each stringer. Then bolt engine mounts to the angle aluminum
or angle iron(stainless). All through-bolted… no lag screws.
I cannot do this angle aluminum approach as the engine and stern tube are deep in the hull
. To widen the stringers any more would leave the stringers only 1/4" above the hull
, way too short to bolt. To raise them up and move them out would raise the engine and that is not an option without altering the stern tube (no way). I can not rebuild
the bridge like engine bed structure to the level it was. Nor can I widen the stringers.The traditional method is to encapsulate hunks of endangered species lumber
in glass and lag screw engine mounts into them. It seems the tide has changed on this soggy lumber lag-screw method in the literature (for good reason).
Is this buttress path sound?
How does one calculate number of buttresses and layup
Is there a better term than buttress?
Do you have a better idea?