Taking off from NE runway of A37 in Ar234 in auto-takeoff, 100% fuel, 4 x 500kg, drones pass lead plane on rw @ about 100 mph. I hit rato @ 100 and drones do the same. Lead plane lifts off and climbs drones fail to climb, shoot off end of rw in level flight. I take flaps off while rato on. One drone begins to climb the other actually descends @ treetop level. I back off to about 80% throtttle and one drone catches up the other continues @ tree top level and soon goes boom. The first time I'd did this both drones treetopped it. The drones still pass the lead plane in manual takeoff but climb somewhat normally (it's challenging to avoid losing them).
