RE: Boomerang Sprint Build Thread!
We love the 821's and have used them in many Boomerangs ( Mainly sprints and Nano's although we do also have an Elan flying in our group that is all 821 equipped)
Although I have seen two Sprints that are fully equipped with 821 servos, which I assume are still flying today.... I still suggest something slightly stronger and preferably metal gear on the elevator. Being a single surface, and what I would guess to be the hardest worked servo on the plane, I just like to have that piece of mind.
Regards Al