The RQ-170 is a flying wing design containing a single (as yet classified) engine and is estimated by Aviation Week as having a wingspan of approximately [REF].
On the basis of the few publicly available photographs of the RQ-170, aviation expert Bill Sweetman has assessed that the UAV is equipped with an electro-optical/infrared sensor and possibly an active electronically scanned array (AESA) radar mounted in its belly fairing.