Hi!  I'm looking to build a UAV with a payload of around 100 kg of water. I'm guessing I'll need an engine of around 35-50 bhp. Got any ideas about the engine? Also, should I use a puller or a pusher prop? My engine budget is somewhere around 1000…

Hi. I want to build a UAV for college and I need a bit of help. I want to make a bigger UAV with an extended range and time of flight (around 3 hours and at least 20 miles). The main thing I need is the wingspan and the size of the craft. If anyone…