Two Pi R - what a poof!! Tailchases only contain 'authorised aeros?' What kind of wet-pants softies are flying at UASs these days?
How to throw off the Boss Manoeuvre #1. Tart around for a few minutes doing the usual Learning Command cr@p, then call 'looping' (because he's probably an ex-C130 driver and too stupid to notice). He'll follow you uphill, then when you're on the last quarter, push a bit and accelerate. He won't notice and will get stretched, call 'rolling' and start what looks like a fairly large barrel roll; when you get to about 120 deg of bank with the nose reasonably high, apply full aileron and a fair bit of rudder in the direction of roll to the 210 deg of bank position, centralise and pull hard down towards him. He'll go whistling past still going uphill, dazed and confused. Push to +0.5G, keeping an eye over your shoulder; when you've got about 120Kts, start a hard level turn underneath him into his blind spot.
Worked every time - and the students loved it because they liked him as much as we of the junta did!!