Never one to be building only one, two or three projects at any one time. Myself and John from the Portsmouth Model Boat Display Team have embarked on preliminary research into an RC Shark.
The first image is a cardboard mock up I built about 5 years ago to check available space as well as practicalities relating to the flapping tail. The other sketches are preliminary internal arrangements. these keep changing and are currently out of date already.
We are mocking up drawings to full size while also researching 'shark skin'. Currently I am mucking about with polyurethane rubber two mix, which is looking promising, it sticks to itself, it can reproduce detail well, and it will last longer than either latex or foam latex...however, we need to brush it onto a model or into a mold and it will run off vertical surfaces, any suggestions for either a thickener or a similar material to aid us? We have been dealing with Tiranti's of Reading so far, however, they do not produce a thickener. I have tried an epoxy thickener, which consists of fibres, it works but ruins the inherent flexibility of the shark skin.
The cardboard mock up is 60" in length, John wants to boost that to 72"! My concern is we will have to stick wheels on the bottom