Comment on "Efficiency: Perfect pitch UAVs and airboats lead to new propellers (at least some good from UAVs / Drones)"
...y soaring trike. he was explaining to me why a rotax 447 puts out to much thrust f...on the length of the compression stroke. rotax 447 has a longer cylinder and...440 should do the job just cant use the rotax 447 id risk bending battons.i...