Hatseflats Hull Build
A 15ft Pram for Dinghy Cruising
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Hatseflats Design

Fitting Out Hatseflats

Sailing Hatseflats

Building TooPhat

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20170825

Today I finalized the positions of deck beams and stringers. I also revised the construction of the daggerboard case, see drawing. Instead of the 18x28mm deck stringers I now plan to use 40x18mm deck stringers to support the bridge deck. Instead of the 18x28mm the bottom stringers I will use fillets and one or more layers of glass tape. This is much easier to create and leaves a cleaner interior. Note that on TooPhat I relied on the keel plank (45x18mm) and 6mm plywood at the bottom end. I capsized many times with TooPhat and never had a problem with it.

Later on I finalized the design of the hatches. Then I marked the positions for the glass tape to fix the bulkheads to the hull panels. Then I cut the deck beams so that they would not be overlapped by the glass tape - this means that the actual deck beams are slightly shorter than in the 'Internal Structure' table below. I ended the session with glueing the deck beams to the bulkheads. To avoid excess epoxy I stuck packing tape around the edges of the deck beams. To temporarily fasten the beams to the bulkheads I used 4x30 gyproc screws.

Internal structure (updated)

BulkheadSideItemDimensions
S0AftDeck beam40x18x300
S0N/AKing plank40x18x1050
S492FwdDeck beam40x18x780
S492AftInspection hatch opening165mm
S992FwdDeck beam40x18x1220
S992AftHatch opening port285x235 (250x200)
S992AftHatch opening stbd285x235 (250x200)
S1592AftDeck beam port40x18x610
S1592AftDeck beam stbd40x18x610
S1592AftDeck stringer40x18x500
S1592AftDeck stringer40x18x500
S1592FwdDagbox top40x18x500
S1592AftDagbox keel40x18x510
S1592AftDagbox post fwd40x18x370
S2092FwdDagbox post aft40x18x410
S2092FwdDeck beam port40x18x700
S2092FwdDeck beam stbd40x18x700
S2092AftSeat supportTBD
S2092AftHatch opening port325x275
S2092AftHatch opening stbd325x275
S3700FwdSeat supportTBD
S3700FwdHatch opening440x240
S3700AftDeck beam40x18x1390
S4100FwdInspection hatch opening165mm
S4100AftDeck beam40x18x1160 (a bit short)
S4500FwdDeck beam40x18x1110
S4500N/AKing plank40x18x825



20170825_daggerboardcase.jpg