An electrically-propelled dirigible balloon combined with lifting aeroplanes. Its envelope constructed by Carl E. Myers at his balloon farm at Frankfort, N.Y. for Mr. W. M. Keil of Tuxedo Park, N.Y., this Keil-Myers HTA/LTA airship was presented the week of January 13, 1906 at the 69th Regiment Armoury Auto Show in Manhattan, of which the aviation exhibition element was put on by the Aero Club of America. Nothing is known of its existence afterwards.