in order to rotate the drive crank 70 an invention has been described wherein an access door 43 in fig3 and 5 swings open without invading the space within the nacelle 3 as does doors 6a and 6b in fig2 while it may be true that the drive crank 70 in fig5 and 6 does cause pin 87 to move in the direction of arrow 121 in fig6 during rotation and that such motion may be viewed as an invasion this invasion is very small and can be minimized by modifying radius arm crank also the thickness 125 in fig3 of the drive crank can be less than one inch further the drive crank can be located at any point along length 130 thus it is probable that a cavity can be found in the space allocated to the engine such as cavity 133 in fig2 which will allow the invasion of the drive crank 70 during rotation several important features of the invention are the following one pivot 54 forms a first axis about which the door 43 rotates and the first axis itself moves outward from the nacelle during door opening as indicated by arrow 94 in fig7 the motion of the first axis provides a clearance which allows access along the path indicated by arrow 140a in fig3 such access is not available along the analogous path 141 in fig2 further the invention allows access along the paths of arrows 140a 140d in fig3 each of the paths indicated by arrows 140a and 140c are perpendicular to the paths indicated by arrows 140b and 140d two a pair of radius arms 45 is shown in fig3 the pair of arms forms a frame which supports the door 43.