Thursday, August 14, 2014

8-22-14:  All moulds were rechecked on the master loft panel and trued up, center marked etc.   Base is marked with two reference center lines.  Need to transfer the original keel jig longitudinal lines onto the keelson itself then using laser beam layout center lines and station profile marks to allow shaping to begin.



8-18-14:  The final lower level laminate is glued in place and cured.    Went ahead and removed the keelson, cleared the deck and started laying out moulds.  The springback is ~6mm so opting to figure later once the moulds are set and new loft lines checked with laser.



















The keel has been getting in the way so moved it onto a flat dolly and hiding it under backbone.
 



This is the last steam bend for the backbone and getting ready for glue up in a few days.

Here the gap for frames and cross members is seen beneath 'G' laminate.


Wednesday, August 6, 2014




Laminate F glue up shown here to right.  Need to steam this tomorrow and bend on jig so likely putting off glue up final till early next week.  I missed the trim on E so had to cut scarf insitu on stack and glue in inserts.

Putting together some numbers on cold-mould material.  Surface of hull is 9.93E6 mm^2.  Will need 7.4 sheets of 4'x8'x3mm  BS1088 marine ply.  Assuming 10% loss but have 2/3 sheet to make mistakes.
A change is looking up for frames made from ply sheets as well instead of oak.  Cost by BF is very high but efficiency  seems to make it about even overall.  It appears the length of the curves from shear to shear (is that gunall to gunall?) is nearly 2 meter for stations 7, 6, 5, 4.  For a first design of a laminated frame built up from 3mm plys it requires 1/3 of a 4'x8' sheet.  Considering 3-5 frames in the station 4-7 region focused about the centroid of the keel 2 more sheets are needed.
There is very little design ready for the internal structures, bulkhead etc.  Looking at 6mm sheets there and maybe another 3mm to build 9mm if needed.  So....1x 6mm, 11x 3mm.  How's the glue holdin' up?