Glider
In the SE catalog they are using a ratio of 1.65 for there lift spec. Did they change this ratio somewhere along the line, like when they came out with the new 96 motor? So there se257 is 569 lift with 1.65 ratio as the catalog. If stock ratio is only 1.625 then the lift is only 560. Do you know what the other manufactures us for a ratio when they quote there lift specs?