The potential for a correction by Rethorst for Vortex Lattice Methods (VLMs) exists to improve Longitudinal Static Stability predictions when applying the Rethorst correction to a slipstream engulfed horizontal stabilizer. The Rethorst correction has already proven to result in accurate lift predictions in VLMs for an isolated wing in a slipstream jet. The aim of this thesis is to investigate the applicability for the Rethorst correction at the horizontal stabilizer, by evaluating the derivation assumption and attempting to obtain an accurate prediction of the stabilizer lift using the correction. With this regard, this thesis has been unsuccessful. An overestimation in the average dynamic pressure and downwash are obtained at the stabilizer, which possibly result from modeling issues. The left over work necessary to successfully draw a conclusion is identified and involves investigating the possible modeling issues and the Rethorst correction application outside its assumption scope.