That’s a serious machine! The “T-28 scale (15kgs)” most likely refers to a very large-scale Radio-Controlled (RC) model of the North American T-28 Trojan trainer aircraft, which has an all-up flying weight of around 15 kilograms (about 33 pounds)
This size places it squarely in the category of Giant Scale Warbirds, which typically require significant power and careful handling