Single Swimming Arm is a single arm that swims.

The arm is modelled on a human arm and comes in a variety of lengths, colours and muscularity. It terminates in a hand at one end and a rounded knob at the other where the joint of the humerus would be (if the arm was taken from a real person) It flexes at the elbow and the fully articulated hand can also make a range of movements.

Contained within its fake fleshy interior is a miracle of hydraulics, levers, motors, sinews, along with a signal receiver, battery and a controlling chip.

When placed in the water, and activated via a remote control, the Single Swimming Arm does exactly what it was designed to do. ie it starts swimming. This is its sole purpose and function. It can swim in circles like an orbiting fish or it can zig zag along in a straight line. It can make lazy casual strokes or it can really splash about.

Inevitable deluxe Single Swimming Arm can be fully customised with tattoos, jewellery, scars, watches etc and can be displayed in a cabinet when not being deployed in the nearest lake or swimming pool.
-- xenzag, Jun 06 2025

The Monospinner: a controllable flying vehicle with a single moving part https://www.youtube...watch?v=P3fM6VwXXFM
[Voice, Jun 07 2025]

[+]
-- Voice, Jun 06 2025


When I un-boxed mine and put it in the water, it just rotated awkwardly around its own centre of gravity; what am I doing wrong?
-- pertinax, Jun 07 2025


You must live in a zone that's near too many magnets. Try it in the nearest swimming pool, but pre-energise the water by leaving a row of car batteries along the bottom for a few days.
-- xenzag, Jun 07 2025


That went much better. [+]
-- pertinax, Jun 07 2025


I thought it would be handier.
-- 2 fries shy of a happy meal, Jun 08 2025



random, halfbakery