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We propose a string-derived model based on the gauge group $SU(5)\times U(1)$which satisfies the stringent constraints from no-scale supergravity, allowsgauge coupling unification at the string scale, and entails previouslyunexplored correlations among various sectors of the model. All supersymmetricobservables are given in terms of a single mass parameter with self-consistencyof the model determining the rest, including $\tan\beta=2.2-2.3$ and$m_t\approx175\GeV$. A small non-universality of the scalar masses at thestring scale produces a downward shift in the right-handed slepton masses atthe electroweak scale, such that for $m_{1/2}\gsim180\GeV$ these particlesbecome lighter than the lightest neutralino. This cutoff in the parameter spaceentails the imminent discovery of charginos at the Tevatron via trileptonevents ($m_{\chi^\pm_1}<90\GeV$). Also, the lightest Higgs boson($m_h<90\GeV$), the lightest chargino, and the right-handed sleptons($m_{\tilde\ell_R}<50\GeV$) should be readily observable at LEPII. We alsodiscuss the model predictions for $B(b\to s\gamma)$, $(g-2)_\mu$, $R_b$, andthe prospects for direct neutralino dark matter detection.Comment: 10 pages, LaTeX, 3 figures (included

String no-scale supergravity model and its experimental consequences