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| Repower Articles |
| Raptor - Repower of a custom 36 Ft "New Wave" commercial dive
boat |
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| Getting started meant bringing the boat to Seaboard
and getting it set up to work in most any kind of weather. The
effort it takes to cover a boat for a big project pays for itself
may times over. |
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| This picture is where the new V-Drive will mount
and show the cutout in the forward engine room bulkhead that will
allow the hydraulic pump to fit into the fish hold area. |
The prep work inside the boat consisted of lots of
grinding and patching of old holes (6" exhaust and misc. shown at
transom end). |
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These photos
show the construction of the integral lift muffler. Lots of engineering
and work equaled a major job. We used a 6" inlet, and a 8"
outlet. The box was about 7 cu ft with one baffle dividing the inlet from
the outlet.
Very quiet and low restriction. |
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| Shows the fish
hold side of the bulkhead with the hydraulic pump. A very heavy duty
sealed aluminum cover was installed after everything was checked out. |
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| The lift in was
a big day as it came after 2 months of very hard work for the owner..
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| Kind of anti-climatic as it was only a 15 minute process. |
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| This is a combination
hi pressure and low pressure air system that makes "designer"
air or NITROX.. This system fills an average of 21 scuba bottles each
work day with oxygen rich air (about 36% oxygen 14% nitrogen) and
is hydraulically driven of the main engine.. Very complex and the
cost of this type of system reflects that. |
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| Finished outlet end of lift muffler and original
steering ram that connects to outside rudder. |
This is the forward corner of the muffler before the
6" input pipe was installed. Some of the required equip. (large deck pump, inverter, batteries and
some misc electrical) |
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| The mounting of the V-Drive took somewhat more effort
than we thought, but the end result was worth it. Since the V-Drive
carries all of the thrust, the mounting must be substantial. We used
a fully isolated system (Clark mounts) fabricated with 3/4",
1" and 1 1/4" Aluminum. |
The finished V-Drive just before hook-up to the engine
and sea trials. |
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| This is the Centa torsional coupling that the GWB (U-joint)
drive line bolts to. The engine is 4-point mounted on Barry isolators
that are softer than stock. Aluminum was the material of choice for all
the misc bracketing. |
Besides all of the engine room work, we had to build
a custom SS strut to accommodate the larger shaft (2 1/4")
and prop. I make most of my struts with a single leg build out ot 3 pieces
forming a very strong, stiff and sleek wing section about 1 1/2"
thick thru the center area. All 316L stainless. When we first sea trialed,
the boat was under propped quite a bit (my fault). We ended up adding
2" of pitch and ended up w/ a 26x29 4 B med cupped Nibral wheel. |
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| Semi custom shaft packing and shaft wiper for zinc |
Remote mounted Racor air cleaner under the deck
away from any potential salt spray. |
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| We waited till
close to the end of the project to build a custom exhaust riser and
tie in into the lift muffler.. We wanted to be sure that its design
did not hinder access to any area of the engine room..We used a 2"
bypass for safety incase the lift muffler ever flooded. |
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| The dash is very simple but effective in providing
all of the necessary information for engine monitoring. The analog panel
and digital panels were supplied by Cummins. The digital unit supplies
a wealth of information along with fuel consumption rate and total fuel
use w/ an accuracy of less that 1%. Ronnie kept his original pyro, boost
and transmission gages for back-up. His Comnav auto pilot hasn't missed
a beat in over 7000 hrs of boat operation. |
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Raptor - 36' "New Wave" commercial dive boat |
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