anyone got a oppy / optimist dinghy near them ...please

[jema]

hi, daughters centerboard has gone missing over winter, need to make a new one ASAP, please could some kind soul measure the length / bredth of their centre board,
just found the marine ply, if someone could help with the dimensions, i can cut it out & start laminating it early tomorrow

also any one know if the different types of oppy have different lengths , shes in a polyprop .. heavy plastic one, just thinking about the weight ratios on the light weight wood / grp's etc to right from capsize, she doesnt race, just club sails

...many thanks J.

 

[boguing]

Oppie rules.

Page 13. Much more accurate then measuring the slightly twisted ones in the garage!

 

[l'escargot]

The class rules (here) give these dimensions:

3.3.2.1 The daggerboard shall be generally a rectangular flat plane in shape except that the lower corners shall be rounded to a radius of no more than 32mm, and the upper corners shall be rounded to a radius of no more than 5 mm. Upper corners and stop batten edges shall have no sharp projections.

3.3.2.2 The thickness of the daggerboard (excluding bevels) shall be not less than 14mm (12mm for wooden construction) and not more than 15mm. Bevelling is permitted between all edges (except for the top edge) and the bevelling limits, situated 60mm from all edges. There shall be no bevelling underneath the stop battens.

3.3.2.3 The overall length of the daggerboard shall be 1067 +/- 5 mm and the width 285 +/- 5mm. Within these limits, the length and width shall each not vary by more than 3mm.

3.3.2.4 The daggerboard shall be fitted with stop battens, one on each side of the daggerboard. Sizes and shapes of stop battens shall be generally uniform without cut-outs and/or sudden changes. The battens shall be made from wood and extend over the full width of the board with the top of the battens level with the top of the board. The depth shall be 35 +/- 5mm throughout. The thickness of the assembled stop battens and daggerboard shall be 45 +/-5mm throughout. The exposed edges of the battens shall be rounded to a radius of 5 +0/-2 mm. The battens shall be fixed with glue, and two 5 (+/-1.5) mm metal bolts and nuts. The length of these fasteners shall be the same (+0/-5) as the thickness of the assembled daggerboard and stop battens.

 

[l'escargot]

Snap - Simultaneous posts /forums/images/graemlins/laugh.gif

 

[jema]

many, many , many thanks
shall start scribing up the ply now.... bit late for the circular saw & neighbours.....tee
regard J.