The phrase "an actual functioning" is correct and usable in written English.
It can be used when describing something that is not only real but also operational or effective in its intended purpose.
Example: "The prototype is not just a concept; it is an actual functioning model that can be tested in real-world conditions."
Alternatives: "a real working" or "a genuine operational".
And obviously in this alternate universe he was totally and utterly incapable of building an actual functioning time machine.
"We want an actual, functioning democratic state, a government that serves its people, an objective judiciary," says Mr. Vuzharov.
It's a long way from building an actual, functioning hyperloop – and rival HTT has signed similar agreements with Indian regional government agencies.
But they'd probably figure it out a lot quicker if my coffee table was an actual, functioning NES the size of a normal table.
This particular crazy-ass interface, used by Samsung in promotions for the Jet, is certainly cool, but is more a "look and feel" of what will be coming out in years to come than an actual functioning interface.
It is our hope to provide a view into our minds as we move from the inception of a new concept (merging neutral molecular beams) to an actual, functioning apparatus.
Each two-page spread is composed apparently to suggest a Web page -- on each, for example, a sort of index tab at upper right contains three vague glyphs that evoke Windows icons without having an actual function (although they do change shape and color with each chapter).
Furthermore, this set-up enables biological data to be presented as an actual function of deposited mass obtained in real-time during exposure (Table 1).
Here the Dirac delta can be given by an actual function, having the property that for every real function F one has \int F x)\delta_\alpha(x) = F 0) as anticipated by Fourier and Cauchy.
Whether these genes have an actual function or whether their expression is a temporary genome drag remains unclear.
People close to the individual, he wrote, "tend to understate a defendant's actual functioning markedly" because they do not want him to face execution.
