[en] A simplified model of a fully ionized, stable magnetically confined plasma, being subject to a classical transport, is used to estimate an upper limit of the Lawson parameter nTsub(E). The latter is expressed in terms of three variables, i.e. the plasma temperature, the beta value, and the number of ion Larmor radii Nsub(i) being contained within the thickness of the plasma body. There are two results from this analysis. First, values of nTsub(E) near its upper limit are reached at moderately large numbers Nsub(i). Such numbers are desirable in confinement systems where large Larmor radius (LLR) effects become important to stability. Second, high beta values are necessary when nTsub(E) has to exceed its critical value for ignition by a sufficiently large margin. Thus, when there is no effective reabsorption of cyclotron radiation, low beta values would otherwise lead to conditions which are insufficient for ignition. Moreover, to reach the power levels of a full-scale reactor in Extrap-like systems, the number of ion Larmor radii within the plasma thickness would have to be in the range 10 equals or about Nsub(i) equal or about 30. An important task for further analysis is therefore to determine the highest values of Nsub(i) for which stable plasma equilibria can be realized. With 10 refs and 1 figure. (Author)