Flying Fifteen Pacific - 4034

This is the essence of the F-15, at least from my narrow view 5,000 miles from the nearest regatta.

I finished the keel proposal and request  and submitted it to a casting business in southern California. No word yet but it is a one off strange request.  They did a very fast turn around keel some years back for a damaged boat and they pour in the several ton range daily.

General specification:

Keel Plug:

1. Construction: Plug is to be one part.  Will discuss with you if it needs to be two pieces.
2. Material:  Built up from wood, foam, Bondo and fiberglass.  See figure 1.
3. Shrinkage allowance: 1/8”/foot shrinkage allowance.  
4. Draft allowance:  The shape seems to be well accommodating for retrieval from sand form.  
5. Finish:  Sanded fiberglass.
6. Weight:  Approximately ~30 lbs.
   Shipping dimensions: 2.5’ x 1’ x 7’
   Metal Keel Casting:

1. Construction:  Malleable cast iron.  
2. Material:  Malleable cast iron, Nodular iron both appear to be good toughness without post heat treat.  
3. Finish:  Smooth as possible without incurring additional cost.  
4. Weight:  Expected 370 lbs.
5. CG:  29.5” horizontal, 6” vertical, center-line transverse.  
6. Flange:  I am planning on ½” diameter through holes, 10x eq spc.
7. Shipping method:  TBD - ocean freight.
8. Shipping weight: 400lbs
9. Shipping dimensions: 2.5’ x 1’ x 7’

   

Figure 1:  Plywood sheets, foam and fiberglass plug with same dimensions as finished piece with compensation for shrinkage.