How to Solve the Ground Problem? - . The aerospace industry has tried to solve this problem for more than 70 years. The obvious solution: build electric motors into the plane's wheels - but the technology and engineering needed to do this are very complex. Since we began work on WheelTug, the following large aerospace companies have launched programs to develop competing products: Crane, L-3, Lufthansa, and EGTS (Safran + Honeywell). No matter what approach they've taken, all have abandoned their efforts. CONFIDENTIAL - PURSUANT TO FED. R. CRIM. P. 6(e) DB-SDNY-0091239 CONFIDENTIAL SDNY_GM_00237423 EFTA01387964