Decoy ducks are used to hold sprinkler intakes off the floor of the lake so they don't pickup the minerals floating in the water near the bottom

The Decoy's spend years in the lakes or waterways. The models with detachable heads can have their head lost in a storm or impact with a boat or a russel with a large animal.

The CUP Model##

The CUP model is for a Flambeau decoy that simply has the company name and a patent date in the 80's. The original head would have clicked in, but with the aged plastic the flaps don't flex very well, so we made a screw to hold it together. My recommendation is after you are content with the fit… glue it in place.

The Cup has the stops to prevent it from turning. Not the front and back should you mount anything on it.

The SCREW-IN Model

The screw on head is found on newer ducks and goose models. The are more likely to be knocked out when hit or impacted by something that triggers a twist to the left.

I currently only have one old goose body to fit it to. The model screws in well but it is hard to tell what actually locks it in place… where the pressure of the thread stops or literally where it bottoms out.

So… I marked what should be the front and back with square notches. But.. I have had it screw in about 15 degrees past the notch. The only way to assure what is going to be dead center on yours may be to print one. If you intent to print your new head directly on the adapter, you may find out when it is done if it faces straight or a little off to one side.

If you do flip the screw in adapter and print a head directly on top you will need some supports for the overhangs.

Screw-in Installation

The Screw in uses the beginning of the thread to get below the neck thread. Generally the entry will be about even with the flat spots on the taper. After the full approach is in the flat part of the thread should align with the gap between the threads. At that point you should be able to push down clicking the treads into the hole and then twisting to the right until tight.

The HEADS

Print what you want. I printed daffy at 490% and glued it onto the cup model that I printed with the first part of the neck in place.

I have the twist on model with a 460% daffy neck and head that will print in place. Only the bill and eyes will get glued on.

Ultimately you can use whatever you think you want to put on your float.

If you want the cut Daffy body I have to start building the rest of the assembly, let me know.

The daffy parts came from https://thingiverse.com/thing:2526005

Thanks to https://www.printables.com/@Geoff for sending me the eyes and pin

The Orange is a duramic / overture PETG. For glue I used cpvc primer and a cpvc glue. We will see how that holds up.

As another source of heads you may look at https://www.thingiverse.com/thing:1778341