necessary to make the magsail practical since the current required is large. However, protection from solar heating is necessary closer to the Sun, for example by highly reflective coatings. If operated in interstellar space low temperature superconductors (LTS) could be adequate since the temperature of a vacuum is 2.7 K, but radiation and other heat sources from the spacecraft may render LTS impractical. The critical current carrying capacity of the promising HTS YBCO coated superconductor wire increases at lower temperatures with a current density (A/m2) of 6x1010 at 77 K and 9x1011 at 5 K. The superconductor critical current is defined as (A) for a coil wire of radius (m). Magsail kinematic model (MKM) The MHD applicability test of equation fails in some ISM deceleration cases and a kinematic model is necessary, such as the one documented in 2017 by Claudius Gros summarized here. A spacecraft with an overall mass and velocity follows equation (1) of motion as: where (N) is force predicted by this model, is the proton number density (m−3), is the proton mass (kg), (kg/m3) the plasma density, and (m2) the effective reflection area. This equation assumes that the spacecraft encounters particles per second and that every particle of mass is completed reflected. Note that this equation is of the same form as with =4, interpreting the term as just a number. Gros numerically determined the effective reflection area by integrating the degree of reflection of approaching protons interacting with the superconducting loop magnetic field according to the Biot-Savart law. The reported result was independent of the loop radius . An accurate curve fit as reported in Figure 4 to the numerical evaluation for the effective reflection area for a magnetic sail in the axial configuration from equation (8) was where (m2) is the area enclosed by the current carrying loop, (m/s) the speed of light, and the value (A) determined a good curve fit for =105 A, the current through the loop. In 2020, Perakis published an analysis that corroborated the above formula with parameters selected for the solar wind and reported a force no more than 9% less than the Gros model for =105 A and =100 m with the coil in an axial orientation.. That analysis also reported on the effect of magsail tilt angle on lift and side forces for a use case in maneuvering within the solar system. For comparison purposes, the