My favorite way to build this class is to target an all up weight of about 300-350 grams. This gives a disc loading similar to a very light 5” racing drone. So you get racing drone acceleration and handling with freestyle drone durability. If your goal is a more “flingable” freestyle build, shoot for about 400 grams. I’d avoid going over 400 grams in this size class.
All of the builds on this page should come out around 300-350g when paired with an 850 mAh 4S battery. To add weight, just use a slightly bigger battery.
A build in this class hasn’t got the power to carry a full size GoPro with authority. So I just don’t carry a GoPro! Since I don’t have to worry about breaking a GoPro, I can really cut loose and try tricks I might be too scared of with a five inch. The smaller size and weight of the 4” freestyle means it’s more durable than a 5”. But its 2004 motors give plenty of power, especially when paired with a slightly lighter battery.
The end result is a quad that has all the fun and performance of a five inch, with less of the worry about taking big risks and damaging things. The only tradeoff is that you have to settle for DVR recording instead of GoPro, and a lot of the time, that’s just fine by me.