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| Kort diagram |
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| Trawler with kort nozzle in Iceland |
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| 10" schedule 40 PVC Tee |
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| Nozzle insert location. CL is location of stern tube. |
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| Nozzle insert |
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| Nozzle insert lower edge |
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| Cut out for kort insert, keel void sealed, stern tube cut off |
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| Nozzle intake spreader baffle first layer |
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| Fiberglass tape secured with PVC adhesive for fiberglass mechanical attachment to hull. (Fiberglass resin does not adhere to PVC) |
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| Insert installed |
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| Rough cut for cockpit/outboard access |
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| Metal duct tape form, expanding foam spray from interior to create base for hull patch form. |
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| Tape removed, excess foam cut away to inside face of hull. |
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| First layer, chopped strand on foam base |
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| Intake port |
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| Intake starboard |
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| Nozzle starboard |
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| Nozzle port |
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| Propeller aft skeg from 10" x 3/4" PVC trim board. |
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| Cut out aft skeg PVC glued and clamped. |
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| Skeg leading edge eased |
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| Fiberglass tape adhered with PVC glue for epoxy mechanical attachment. PVC nozzle attachment points with no tape (notches) to be glued in-situ. |
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| Propeller aft skeg installed. |
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| 1st fairing coat |
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| Through hull removed, marine ply (scrap) backing plate epoxy in place. Removal with hole saw overcutting through hull flange. Cockpit scupper redirected to kort nozzle. |
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| 2nd layer epoxy with chopped strand. |
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| Nozzle intake enlarged, edges to be eased with rasp. |
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| Lazzaret interior |
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| Nozzle forward intake edge beveled, to be ground smooth |
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| Well head tray (pvc trim board) |
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| Well head with receiver blocks (Schedule 40 offcut and pvc trim board) |
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| Well head dry assembly. Tray approx 3" above water line. |
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| Well head fitted, well head tray dry fitted. |
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| Well head tray box dry assembly. |
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| Plywood sealed with penetrating epoxy |
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| Penetrating Epoxy sealer from Progressive Epoxy |
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| Well head tray box installed |
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| Motor mount and well head tray box extension/retainer at fuel tank shelf. |
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| Well head tray box lateral beam double 3/4" plywood, to secure to tray box aft to lazarette floor and transom beam. Box will be secured to cockpit well with motor mount (triple 3/4" plywood block), cockpit is factory secured to aft bulkhead at scupper. |
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| Well head tray box lazarette lock edges and motor mount with penetrating epoxy, dry assemble. |
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| Motor mount fitted |
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| Well head box lazarette shelf and motor mount |
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| Cockpit-Lazarette outboard "picture frame" |
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| Cockpit-lazarette outboard picture frame dry fit. |
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| Cockpit-lazarette outboard picture frame install. |
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| Outboard test fit in lazarette/cockpit picture frame |
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| Outboard mount cut to lower prop to center of nozzle. |
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| Outboard remote relocated to cockpit |
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| Lazarette hatch |
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| Lazarette and outboard well painted |
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| Outboard in lazarette |
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| Outboard in lazarette picture frame with remote control cable |
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| Nozzle and rudder |
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| Propellor in nozzle |
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| Cockpit |
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| Fuel tanks installed |
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| Outboard installed |
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| Flotation foam for under lazarette |
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| Template for under lazarette bulkhead filler |
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| Aft bulkhead and under lazarette void |
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| Aft bulkhead/under lazarette closed and fiberglass chopped strand sealed. |
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| Flotation foam fill hole cut |
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| Flotation foam equal parts resin and activator in cut of milk jugs, mix in cut off bleach bottle. |
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| Flotation foam fill |
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| Cockpit scupper extension set in chopped strand epoxy |
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| Later this year I may change the current Tohatsu 6 hp for the 8 hp and not use the remote. |
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| Current outboard, critical dimension for the well design is width at cowling 13.9 inches for 8 hp, 13.5 inches for 6 hp. Close enough for minor picture frame modification. |
Fall haulout early November 2017.
The kort inspired modification produced much improved directional control with outboard and minimal impact on direction and speed under sail.
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| Prop in Kort inspired nozzle after one season November 2017 |
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| Kort inspired nozzle after one season November 2017 |
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| Propellor in nozzle November 2017 |
While a larger 2 cylinder 8HP outboard would provide more thrust and be quieter, the single cylinder 6HP outboard has been sufficient.
Winter 2017-18 projects:
Flow through Kort inspired duct:
Enlarge forward cutaways for improved reverse and forward water flow and provide smoother surfaces to reduce turbulence.
Water intake for forward has a slightly larger gross area than output but projected on the same plane has significantly less cross sectional area. The rear output opening is in line with direction of water flow, the forward input opening is on the side of the kort inspired duct providing less cross section exposed to the direction of water flow and requiring water flow to make an approx 60 deg change of direction.
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| Enlarge forward cutaway Weep at lower edge to be ground open and resealed |
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| Forward nozzle entry enlarged, still more work to do on edges. |
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| Nozzle forward edge eased |
Flow at rear sleg:
Cutaway section and smooth nozzle rear skeg insert to reduce turbulence in forward.
Cutaway section and smooth nozzle rear skeg insert to reduce turbulence in forward.
Grind/fill and sand transition at top of nozzle rear skeg to hull for smoother water flow.
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| Rear skeg sweep cut |
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| Well from nozzle |
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| Forward edge eased, next grind edges (grey section) and build up. |
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| Grind thin areas |
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| Starboard cavities |
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| Port cavity |
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| Starboard, epoxy with chopped strand. |
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| Penetrating epoxy coat |
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| Outboard skeg and prop nozzle fore |
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| Outboard prop nozzle aft |
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| Outboard installed |
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| Motor running in well |
Electric Outboard:
Worth looking at as battery range is increasing.
Lazarette picture frame:
Grind/fill and sand cockpit/lazarette picture frame for improved appearance.
Complete vent lid at lazarette top.
Outboard control:
Outboard control:
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| Modify throttle and shift controls for the outboard to reduce cockpit clutter. Control Tee Knob for direct cable attachment at control cable bracket http://www.controlcables.com/1-1-2-red-t-handle-with-pilot-hole/ |
Cockpit scupper:
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| Add scupper flapper valve to cockpit to outboard well scupper to reduce flow back into cockpit during reverse at 3/4 throttle.. |
Logo:
Reinstall FISKSATRA logo.
2018-10-26
The head gasket on the outboard failed, combustion gases leaking out at gasket and loss of compression.
The motor is about 15 years old and probably not worth the cost of a rebuild, so a new motor is the next expense; two cylinder for less vibration, electric start because I am getting lazy and 8 hp to make passage through inlets less intimidating.
Electric would be nice but to get the range I need the additional weight equals another two people and battery cost is multiples of my boat budget.
2018-11-4
Boat moved off "T" end to slip for easier access.
Next rigid frame to be fabricated to support lowered mast to provide for motor lift hoist.
2018-11-11
Mast lowered and secured for motor lift hoist.
2018-11-12
8HP Tohatsu installed on transom bracket using hoist and assistance from Joe and Bud at the marina slip. I will relocate to outboard well when on the hard. No haul out this week, high tides are at and after sunset with rain and high winds forecast, even some freezing rain/snow.
2018-11-14
Fresh gasoline, battery connected, engine oil fill and test run OK.
Need to tighten bracket clamp then ready to go. To travel lift and Haul-Out.
2018-12-5
Transom offset for 8HP Tohatsu is approximately 2 1/2" greater than for the 6HP.
So mounting block will be moved approximately 2 1/4" forward, then check propeller clearance at rear skeg lower edge.
2019-5-19 motor lifted into well from outboard bracket with 5:1 pulley on lowered mast. I failed to account for the dimension of lock bolts for well bracket mount.... lazarette deck opening is 3/4" short.
Do I take the 3/4" from deck opening rear or front???
2019-5-20 I will cut the front of the lazarette deck opening, this I know will work, cutting the rear of the opening will work to clear the rear section of the cowling bolt but may or may not clear the mounting bracket lock bolts. Canoe stern was made rigid with previous transom beam and lazarrete floor, but I will stiffen the deck opening.
2019-5-22 The saber saw disintegrated halfway through the cut. It was salvaged and more than 40 years old. I bought a new DeWalt saber saw, so work will resume.
Photo's to follow.
I will miss the high tide this week for splash, so splash will be 1st week of June.
The head gasket on the outboard failed, combustion gases leaking out at gasket and loss of compression.
The motor is about 15 years old and probably not worth the cost of a rebuild, so a new motor is the next expense; two cylinder for less vibration, electric start because I am getting lazy and 8 hp to make passage through inlets less intimidating.
Electric would be nice but to get the range I need the additional weight equals another two people and battery cost is multiples of my boat budget.
2018-11-4
Boat moved off "T" end to slip for easier access.
Next rigid frame to be fabricated to support lowered mast to provide for motor lift hoist.
2018-11-11
Mast lowered and secured for motor lift hoist.
2018-11-12
8HP Tohatsu installed on transom bracket using hoist and assistance from Joe and Bud at the marina slip. I will relocate to outboard well when on the hard. No haul out this week, high tides are at and after sunset with rain and high winds forecast, even some freezing rain/snow.
2018-11-14
Fresh gasoline, battery connected, engine oil fill and test run OK.
Need to tighten bracket clamp then ready to go. To travel lift and Haul-Out.
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| 2018-11-25 haulout and power wash |
Transom offset for 8HP Tohatsu is approximately 2 1/2" greater than for the 6HP.
So mounting block will be moved approximately 2 1/4" forward, then check propeller clearance at rear skeg lower edge.
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| 2018-12-8 cut out for new motor mount |
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| 2018-12-10 3/4" plywood pattern for new motor mount: 3/4+3/4+3/4=2 1/4" To be cut glued and penetrating epoxy coated. |
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| 2018-12-10 motor mount cut and glued |
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| 2018-12-11 first dry fit |
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| 2018-12-11 edges to be eased |
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| 2018-12-14 dry fit with edges contoured |
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| 2018-12-17 cut for mounting block |
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| 2018-12-17 dry fit |
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| 2018-12-17 more edge trimming |
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| 2018-12-18 more edge work |
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| 2018-12-19 penetrating epoxy |
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| 2019-1-6 motor mount installed, first coat structural fiberglass. |
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| 2019-1-7 schedule 40 PVC cut-off for scupper liner |
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| 2019-1-7 scupper liner |
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| 2019-3-12 Additional space for larger outboard |
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| 2019-4-1 Blower 3" O.D.+ 3" I.D. pipe union + 3" O.D. terminal cap |
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| 2019-4-1 Engine compartment (lazzarete) blower |
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| 2019-4-8 Blower vent cap installed. |
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| 2019-4-8 new zinc on outboard skeg |
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| 2019-5-4 Nozzle rear skeg modified for new prop |
Do I take the 3/4" from deck opening rear or front???
2019-5-20 I will cut the front of the lazarette deck opening, this I know will work, cutting the rear of the opening will work to clear the rear section of the cowling bolt but may or may not clear the mounting bracket lock bolts. Canoe stern was made rigid with previous transom beam and lazarrete floor, but I will stiffen the deck opening.
2019-5-22 The saber saw disintegrated halfway through the cut. It was salvaged and more than 40 years old. I bought a new DeWalt saber saw, so work will resume.
Photo's to follow.
I will miss the high tide this week for splash, so splash will be 1st week of June.
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| 2019-5-25 outboard in well. Mounting bracket 1/4" to thick which will be corrected, motor will then by lower by 2". Rear skeg to be cut away. After lowering the motor I may need to cut out part of the rudder notch I previously filled. |
2019-5-27 cutting and carving to fit new motor complete, and standard prop replaced with elephant ear prop.
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| 2019-6-9 outboard cowling installed, cockpit picture frame trimmed |
After fall 2019 haul-out;
Motor mount trimmed another 1/2" and at a starboard to port angle of 5 deg, to center prop in nozzle.
The prop currently favors the port side of the rudder (40/60%)which then requires the rudder to be set off-center to prevent the boat traveling in a shallow arc.
2020-1-11
Upper 60's F (approx 18 to 20 C), overcast, light wind. The first day without rain or gusting winds for two weeks. It has been a wet and warm winter so far.
-Cockpit tarp removed.
-Outboard lifted from well with 5-1 block and tackle, and wrapped with shrink-wrap from the dumpster.
-Ready for modifications to motor mount.
2020-1-13
Motor mount modified, to be sanded and coated with penetrating epoxy. Low 50's and overcast.
2020-1-26
Cockpit scupper enlarged, to be lined and epoxy coated. Waiting for a dry day after dry overnight with temperatures above mid 40's F.
2020-2-21
Ventilation for outboard in lazarette lid:
2020-1-11
Upper 60's F (approx 18 to 20 C), overcast, light wind. The first day without rain or gusting winds for two weeks. It has been a wet and warm winter so far.
-Cockpit tarp removed.
-Outboard lifted from well with 5-1 block and tackle, and wrapped with shrink-wrap from the dumpster.
-Ready for modifications to motor mount.
2020-1-13
Motor mount modified, to be sanded and coated with penetrating epoxy. Low 50's and overcast.
2020-1-26
Cockpit scupper enlarged, to be lined and epoxy coated. Waiting for a dry day after dry overnight with temperatures above mid 40's F.
2020-2-21
Ventilation for outboard in lazarette lid:
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2020-2-21
Ventilation for outboard in lazarette lid
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| 2020-2-24 Lazzarete lid, repaired, one coat ESP155 Epoxy Primer and Sealer, one coat Rustoleum topcoat |
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| 2020-6-17 |
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| 2020-6-19 sanded and penetrating epoxy |
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| 2020-6-27 coal tar epoxy and outboard installed in well. |
Love this idea
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