If you mean steam, they are the only two operable engines. The hulk of Q&TL #3, a Brooks 2-6-0, is out behind the shops. The pieces were salvaged and brought to Flint about 20 years ago, but it is beyond being a basket case. Potosi y Rio Verde #4, a Baldwin 2-8-0, is on display out on the line, with a couple of log cars attached. It has major firebox problems, a cracked driver and is surplus to any operational needs, so has been just cosmetically restored.
They have 2 diesels, a GE 52 ton steel mill special, a Plymouth diesel mechanical and one Plymouth gas mechanical. They also have 2 ex D&RGW coaches, 1 RGS coach, 2 coaches from the U de Y, 1 coach from the Catskill Mountain railway, an 1875 Kimball coach from the North Pacific Coast Rwy and a Jackson & Sharp observation car (ex private car), also from the U de Y.