Customizing a Duck Invader

Steve Sanford

Well-known member
Good morning, All~


One of the interesting aspects of my gunning boat endeavors is the variety of craft I find in my shop. I have restored a bunch of old classics - and have a bunch more in the queue. And, I've done my share of "mid-century moderns" - 'glass gunning vessels from the 70s and 80s that have become classics, especially South Bay Duckboats. This Spring I have had a Sculling Boat in the shop that must be near its century mark. But, I just completed a boat that was built in the last few years. No rehabilitation was needed; I simply added a host of custom features - "appurtenances" here at Pencil Brook Boatworks - for a Duck Invader 13.


Between the aforementioned Sculling Boat and other NDR projects, there was no room in my shop. This vessel got my attentions in my bay of our car barn.


I brushed on its topcoat of Pettit 3303 - Dull Dead Grass on Friday morning. It was a glorious sunny day...



View attachment A - Frog Pond and Hayfield B.JPG



....so I hauled it out into the sunshine to bake. No need to paint the hull - but everything from the rail up got the 3303.



View attachment B - DI 30 - Final Paint - baking in sun.JPG



The "work order" underwent a number of changes during the course of the customizing. This is the result: lots of thatch rails, a rigid spray shield, flap boards, a revised cockpit hatch system and cleats where they are needed.


View attachment C - DI 32B - Boards up - not chocked - no shock cord.JPG



The 4-inch cleats on the flap board mounts are used to tie the boat to marsh spikes whilst gunning.


View attachment D - DI 34 - Flap Board Mounts - with hinges, thatch rail and 4-inch cleat.JPG



Here is a duck's eye view - but with flap boards down.


View attachment E - DI 38B - Ducks Eye View - darker.JPG



Her portside profile. I moved the "numbers" from the decks - where they would be covered by Salt Hay - to the sides to make them visible/legal. The numbers themselves were new - from DIY Vinyl Lettering as usual for me. I had difficulty, though, trying to move the registration stickers. They are engineered not to be removed. I tried first with my heat gun - which has worked in the past when several stickers are stuck atop one another. As this was single sticker, it shrank and wrinkled beyond re-use. This one I removed with a razor blade - no heat. It would have worked better if I had made up a 3x3 piece of wax paper to apply to the glue side as it came up. Without the wax paper, parts stuck to itself. Therein lies madness.... (and a new set of stickers)



View attachment F - DI 39 - Portside Profile.JPG



Here is the foredeck - with one of my XL Spray Shields that I developed for South Bay Duckboats.



View attachment G - DI 40 Bow quarter.JPG



Another view of the forward end. The hull looks fast and stable - with little draft.



View attachment H - DI 41 - Foredeck.JPG



All of the thatch rails - except for those on the Spray Shield (laminated Mahogany) were made from Trex decking - as requested by the Owner and a first for me. I learned a lot - both attributes and limitations of plastic "lumber". (I have used PVC lumber for other applications on duckboats.)


This product (not certain it's Trex brand - need to check back with my lumber yard) seems to have a composite core coated with a pure plastic skin. It is: much heavier than wood; much less stiff; does not hold a screw. I tried both marine epoxy and Gorilla Glue (polyurethane). The latter seems to work better. It machines nicely, including sanding, and takes paint well. I selected grey boards so any chafe through the paint would look OK. Of course, they should never rot.



Because of the "mid-course corrections", I did have the opportunity to splice long lengths together. I used 1:8 splices and feel better with the Gorilla Glue. I am anxious to see how the splices hold up in use.


Finally, instead of the countersunk flathead or ovalhead fasteners I use on wooden rails, I opted for panheads because I was afraid the countersinks would weaken the rails.



View attachment I - DI 35 - Foredeck thatch rail - Trex and panheads.JPG



The factory cockpit hatch was full-length. I cut it in about half and added thatch rails to the aft section as it will be in place when hiding.



View attachment J - DI 47 - stern hatch and chocked flap boards.JPG



Continued.....


SJS















 
Duck Invader - Part II


I have not yet photographed the finished vessel with the forward hatch in place. I did mold a lip to overlap the aft hatch.



View attachment DI 19 - Hatch lip.JPG



I also moved the handle to a better location - given the new configuration.


View attachment DI 20 - Fwd hatch handle.jpg



Here are the rails near the stern.



View attachment K - DI 48 - Aft thstch rails.JPG



The flap boards were design to lay flat when out - so stool can be placed on them when handling the rig.


View attachment L - DI 43 - Flap boards - level with decoys.JPG



I make sure fastener heads will not cause problems for the gunner or his dog. I used these acorn nuts for the machine screws that hold the T-hinges in place. It will make it easy if the Owner wants to remove the flap boards off- season. For the same reason, I did not bed the hinges (on the board half) in 3M 5200.



View attachment M - DI 31 - Acorn Nuts for T-hinges.JPG



The thatch rail machine screws were secured with hex nuts - but the brass was ground down to be less fearsome. The thatch rails were bedded in 3M 5200 - everywhere on the boat.



View attachment N - DI 52 - Ground brass machine screws and nuts.JPG



The Owner did not ask me to fashion chocks to support the flap boards in gunning mode - but Curiosity got the better of me. These are made from 3/4-inch MDO plywood. They took a lot of finicky measuring and fitting - but are simple, they seem to work, and are secured to the coamings with decoy line.


View attachment O - DI 42 - Flap Board chock - stbd.JPG



These could certainly be helpful as patterns if Mr. Owner prefers a different angle.


View attachment P - DI 51 - Flap Board Chock - in place with lanyard.JPG



Here they are up in gunning mode.


View attachment Q - DI 44 - Flap Boards chocked - with stern hatch in place.JPG



The flap boards will get lots of tall thatch - mostly Cord Grass. So, I made the spacers a full 3/8inch instead of the quarter-inch used elsewhere on the vessel.


View attachment R - DI 55 - Flap Board thatch rails with 3-8-inch spacers.JPG



Continued....


SJS


 
Duck Invader - Home Stretch


The last thing I need to do when I get back to the farm is to reeve some1/4-inch shock cord through these eye straps. The upper ends of the thatch will be lashed to the row of shock cord.


View attachment S - DI 45 - Eye Strap for shock cord.JPG



The flap board mounts are taller than usual - so the boards will lay flat (including on the forward cockpit hatch) when trailering or stored.



View attachment T - DI 53 - flapboards down on aft hatch.JPG



These 6-inch cleats are for mooring. So, they are backed up below with 1/2-plywood backer boards and fender washers. (No photos from below decks yet....)


View attachment U - DI 46 - Cleats and Thatch Rails.JPG



The Spray Shield from aft.


View attachment V - DI 54 - aft side of spray shield.JPG



I muted everything I could find with the 3303. Metal parts (usually s/s) got sanded with 220-grit, then primed with Rustoleum Self-etching Primer.



View attachment W - DI 49 - Dulled details aft.JPG



A bit more muting on the transom - especially the (formerly) bright s/s U-bolts.


View attachment X - DI 50 - Morec dulling aft.JPG



One last portrait. As my neighbor observed: "All it needs now are a couple of torpedo tubes."



View attachment Y - DI 56 - Bow Quarter B.JPG



All the best,


SJS


 
Looks fantastic Steve !!!! Thank you for making a truly custom boat for the way I hunt.
I appreciate it more than you know.


Best
Bob
 
Last edited:
As always great work, the owner sounds quite pleased. Does the Pettit adhere to the original gel coat, or did you scuff it up a bit? The lazy me wants to know.
 
SJ~


Thanks for the kind words.



I scuff-sanded the gelcoat with 120 or 150 grit - then washed with Acetone - then painted with a brush.


All the best,


SJS

 
Thanks Steve. I just built the strongback supports for a new rail skiff. I was hoping for one less step when the time comes to paint. If the lumber doesn't bankrupt me first.
 
Steve, That is a quite a transformation. Maybe I should have traded Bob my Estuary for his Duck Invader?? LOL Thanks for another great post with pictures so we can follow along too. [smile] Seriously, excellent and fascinating as usual.
 
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Wow. You really transformed this rig into sort of a new-age retromod salt marsh gunning machine. Those flapper boards are definitely reminiscent of a South Bay.
 
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