(unpowered)
21Balloon (aircraft) — Ballooning redirects here. For the behavior of spiders and other arthropods, see Ballooning (spider). Not to be confused with Airship or Blimp. Balloon …
22Coleopter — For the insect order, see beetle. Coleopter VXT 8 mockup on display at the Hiller Aviation Museum …
23Class rating — Aircraft Part of a series on Categories of aircraft Supported by lighter than air gases (aerostats) Unpowered Powered …
24AAR wheel arrangement — The AAR wheel arrangement system is a method of classifying locomotive (or unit) wheel arrangements that was developed by the Association of American Railroads. It is essentially a simplification of the European UIC classification, and it is… …
25PKP classification system — (Polish locomotive designation) is a system of assigning letters and numbers to series and individual locomotives used by the PKP Polish national railroad operator. The system was introduced in 1923, shortly after Poland regained her independence …
26Rail transport — Railroad and Railway both redirect here. For other uses, see Railroad (disambiguation). Rail transport is the conveyance of passengers and goods by means of wheeled vehicles specially designed to run along railways or railroads. Rail transport is …
27John Bull (locomotive) — Infobox Locomotive name= John Bull caption=The John Bull , c. 1893. powertype=Steam gauge=RailGauge|ussg builder=Robert Stephenson and Company builddate=1831 railroad=Camden and Amboy Railroad, Pennsylvania Railroad (initial preservation)… …
28British Rail Class 33 — Infobox Locomotive name = BRCW Type 3 British Rail Class 33 powertype = Diesel electric caption = D6547 in original green livery without yellow warning panels near Sundridge Park in 1963. roadnumber = D6500–D6597; later 33001–33065, 33101–33119,… …
29NASA Paresev — Paresev Paresev 1 in landing, 1962 Role Flexible wing research glider Manufacturer …
30Jerauld R. Gentry — Jerry Gentry in front of the Northrop M2 F3 lifting body Nickname …
