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The Rudder - Jotika HM Bomb Vessel Granado 1756 Manual

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Identify and remove the rudder (26) from the 5mm walnut sheet. Also identify the rudder pintle straps (225, 227, 229 & 231)
and the hull gudgeon straps (226, 228, 230 & 232) on the brass etch sheet. The straps are grouped together on the brass etched
sheet and it is advisable only to remove each pair at a time as needed, also the hole, for the pintle and gudgeon, should be
opened up to accommodate them prior to removal from the sheet. The pintles are formed from brass dome headed pins (284)
with their heads removed and the gudgeons are formed from copper eyelets (275). When completed and in position, the straps,
pintle and gudgeon pins are painted white below the waterline and matt (metal) black above the waterline. Similarly the rudder
is painted white below the waterline but left natural above.
Each strap will have to be bent with the half etched area facing outboard, ideally a pair of long nosed pliers should be used.
Glue each rudder pintle strap into position as shown on Plan Sheet 1, 'Hull detail', with the following considerations:
1.
The straps sit tight up into the rudder cut outs as shown.
2.
The ends of the straps will lie close to the after edge of the rudder.
3.
The straps should run perpendicular to the leading edge of the rudder.
Drill a 0.65mm hole through the centre hole of the strap and into the rudder to accommodate the pintle. The pintle (fashioned
from a dome head pin (284)) should be glued into the locating hole and bent downward through 90 degrees, allowing at least
3mm for the downward length to fit into the gudgeon, whilst ensuring the pintle remains within the leading edge of the rudder
i.e. within the cut out 'notch' of the rudder.
With the four pintles and straps in position, using masking tape offer the rudder into position up through the stern counter so
that the lower edge of the rudder is flush with the lower edge of the false keel. Mark on to the sternpost the positions of the
gudgeons (copper eyelets) in relation to the pintles, the gudgeon position should be approximately 0.7mm below the pintle.
The rudder can now be removed and the locating holes (0.65mm) for the gudgeons drilled into the stern post. Temporarily
position the gudgeons into position and re-position the rudder to confirm the fit. When you are happy with the assembly,
remove the rudder and fit the gudgeon straps and gudgeons to the rudder post in a similar manner to the pintle straps. The
gudgeon straps should lie flush against the hull and will need to be slightly bent to achieve this and should also run
perpendicular to the aft edge of the rudder post. Do not re-position the rudder at this stage.
Note: Although vessels of this size were commonly fitted with 5 sets of pintles, gudgeons and straps, it was found during
research of admiralty plans that Granado was only fitted with 4 sets. The two smallest rudder straps on the brass etch sheet
(unnumbered) are therefore not required.
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The Rudder

©
2004 JoTiKa Ltd.
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