The Q's first Hi-Cube Center-Flow covered hoppers joined the roster in 1966, 600 4,600 cubic foot triple hopper grain cars classed LO-8 and numbered CB&Q 86200 - 86699, and FW&D 3051 - 3150. All LO-8's were divided into three compartments and featured three-section trough loading hatches. All but Q 86690 - 86699 had Enterprise gravity outlets, the last 10 cars were equipped with ACF pneumatic outlets. The cars were built at AC&F's Huntington, West Virginia plant starting in March 1966.

Production of Airslide cars began in 1954 and the Q acquired its first 100 of the 2,600 cubic-foot cars from General American in December of that year: Class LO-1's 87000 - 87099. Another 100 nearly identical cars ( but riding on No. 93 roller bearing A-3 Ride Control trucks ) came in 1955, numbered 87100 - 87199 and classed LO-1A. Fifty-two more of the 29-foot long, 2,600 cubic-foot capacity Airslides joined the roster in 1957 as CB&Q Class LO-2 and numbered 87200 - 87251. The next batch of Airslides - 75 more 50 tonners, classed LO-1B and numbered 87300 - 87373 were delivered in 1958, the year the Q adopted its new image, and consequently they came in the new painting/lettering scheme: gray body, black trucks and underbody ( meaning the hopper slope sheets and discharge outlets were now black instead of gray, though the bolsters and draft gear remained gray ), red lettering and a large Scothlite herald. Note the cross stiffener between posts protruding above and below the herald. These cars, like all Q Airslides, had a baked-on enamel lining. Unlike the earlier LO-1 and LO-2 classes which had open bottoms on the outside vertical posts, the LO-1B series posts had closed bottoms. The Class LO-1B's were eventually renumbered into the BN 400800 - 401139 number series.

Quite pleased with the performance of the Airslide cars, the Burlington continued to place regular orders for lots of 50 or 60 more of the 2,600 cubic foot cars through the early 1960's. Following to 60 Class LO-2B car of 1960 ( road #'s CB&Q 87500 - 87549 and C&S 800 - 809 ) came 50 LO-2C's in 1961 ( Q 87550 - 87599 ) and 50 LO-2D's in 1962 ( Q 87600 - 87639 and C&S 810 - 819 ). A couple of tiny spotting features differentiate these cars. First, the vibrator brackets of the 1961 cars and all subsequent Airslides are mounted on oval pads somewhat larger than the rectangular pads used on all previous production. Then, on the 1962 cars, the number of rivets employed on the vertical channel braces at the ends of each car side is reduced considerably from previous standard practice; where earlier cars have 26 rivets per channel brace, the 1962 LO-2D's have but 12, and the bottom connection to the side is welded rather than riveted.

In 1956 the Q introduced a new series of 60' 70-ton capacity flatcars designed to carry farm machinery. Built at Havelock ( CB&Q shops in Nebraska ) and classified FM-3, additional batches were delivered throughout the 1960's, resulting in 650 of these machinery flats on the roster by 1967, numbered 94250 - 94649. All had hydraulic cushioning, all-welded construction, and tie-down devices specifically designed for farm implements. Note 42 in the October 1971 ORER reads:

Cars in series 94000 to 94049 ( except cars 94000, 94005, 94013, 94018 94021, 94032, 94039, and 94047 ) are equipped with tie-downs for Caterpillar service; cars in series 94250 to 94649 are equipped with tie-downs for handling automobile components.

Production of Airslide cars began in 1954 and the Q acquired its first 100 of the 2,600 cubic-foot cars from General American in December of that year: Class LO-1's 87000 - 87099. Another 100 nearly identical cars ( but riding on No. 93 roller bearing A-3 Ride Control trucks ) came in 1955, numbered 87100 - 87199 and classed LO-1A. Fifty-two more of the 29-foot long, 2,600 cubic-foot capacity Airslides joined the roster in 1957 as CB&Q Class LO-2 and numbered 87200 - 87251. The next batch of Airslides - 75 more 50 tonners, classed LO-1B and numbered 87300 - 87373 were delivered in 1958, the year the Q adopted its new image, and consequently they came in the new painting/lettering scheme: gray body, black trucks and underbody ( meaning the hopper slope sheets and discharge outlets were now black instead of gray, though the bolsters and draft gear remained gray ), red lettering and a large Scothlite herald. Note the cross stiffener between posts protruding above and below the herald. These cars, like all Q Airslides, had a baked-on enamel lining.

Havelock ( CB&Q shops in Nebraska ) built a number of straight-sided mill gondolas, including Class GM-10 197550 - 197649 constructed in January 1968. These straight-sided cars had an unusually low inside height of 4 foot 6 inch to facilitate loading of steel products. The GM-10 class had nailable steel floors, 148,000 pound capacity and a capacity of 2,560 cu. ft.