"Hello....not a pro of radio equipment....so little question...how the ppm reduce the number of wire...I am guessing it is about sending serial signal in one wire...but this is between APM and the receiver?"

"@hook...Do you know the average endurance with the 2 1500cc tanks?   what is the average max payload weight?
wing are fiberglass? carbone fiber? or covered balsa strucutre?"