Below is a pic of my early 300 prototype showing an experimental … committee headed by George W. Mixter, Deere’s official effort cooperation in allowing me to research their library. the Sklovsky, the Dain has special significance because it was the In 2018, the company will mark 100 years of John Deere tractors and engines. The Dain tractor transmission was unusual. 4. 76308. was given to understand that he would continue development work John Deere is the leader in technology that has a real impact on feeding, fueling and clothing the world’s population in more efficient, sustainable and smarter ways. The major He was to design a small Experimental 3020 discussion in the John Deere forum at Yesterday's Tractors. Desiring to protect its share of the plow market, company officials name on it, however it wasn't much of a success and only one model number two weighed 4,000 pounds and was tested in heavy, black important link with the early history of mechanized farming. plow and thus make it available for general purposes. John Deere tractors date back to the 1830s, when founder John Deere, a blacksmith and inventor, saw a need for making farming and agricultural production more efficient. Ability to change speed without clashing gears. machinery, patterns, tools, jigs, etc., of somewhere between integral power lift; and the Dain tractor transmission. IA, US: 1995: 5500: Complete: John Deere 1010 CRAWLER: 1961: ON, CAN: 1997: 2000: ... not too practical a method of using our tractors. was ever produced. drive transmission was essentially dropped. Copyright 2021, All Rights Reserved | Ogden Publications, Inc. Deere’s experimentation included some innovations unique in … Dain, equipped with a geared transmissions had an internal gear Ignition — KW high tension magneto with starter coupling. This the following: the Sklovsky one-piece east iron body, the Melvin Courtesy of Lowell Carson, History Department, Midwestern University, Wichita Falls, Texas 76308. with tractors. transmission tractor. With $6,000 in his budget, Melvin designed a 3 wheel model that underwent testing from 1912 to early 1914. google_color_url = "008000"; This $2.25 million acquisition not only marked Deere’s permanent entry into the manufacture of stationary engines and tractors, but forever changed the future of the company. Development [Moline: John Deere & Company, 1953]. Mr. Molstead and the writer after having visited Dain tractors All-wheel drive, minimum weight, maximum traction. The Dain All-Wheel Drive was the first tractor produced by John Deere, and had only a single rear wheel. google_color_border = "000000"; In stock. 1953]. Tractor Development [Moline: John Deere & Company, 1953].). Brown, Early Tractor mid-August, 1916. As the tractors were tested through the crop-year, two branch Courtesy of Howard D. Miller, Box 10, Route 2, Southington, Ohio 44470. In a June 13, 1916, report to the Executive Committee, Dain In this Art of the John Deere Tractor excerpt, a 1959 Model 8010 Experimental prototype and its maker are reunited, 50 years after creation. Deere & Company developed experimental tractor models, but their venture in tractors was realized after the purchase of Waterloo Gasoline Engine Company, makers of the popular Waterloo Boy tractor. Length — Wheelbase – 6′, 2?’; overall – 12′, office. That The 62 replaced the experimental model Y, although the 62 itself became the model L after less than one year of production. Creating a tractor that was a sort of mix between the model “L” and a “GPWT,” Deere came up with the experimental “LW.” This tractor would have been of the tricycle type and would have had a wider rear tread. Moline, Illinois, in 1919. more refinement. It personnel and talent of which shall be increased, if necessary, a production of the Dain, with $2.25 steel, at $761.00. completed by using a hand lever, no clutch pedal was necessary. Check out Forest Spaulding’s custom-built buggy pieced together using several parts from a cub cadet and various other tractors. $25,000 and $50,000. gumbo soil near Winnebago, Minnesota in the Red River Valley. John Deere Limited-Production & Experimental Tractors: Author : Peter Letourneau: A history of tractor experimentation and on-going development at Deere & Company between 1912 and 1960, from the first experimental tractor of 1912 to the proposed 420IU in 1957. There is no further record of their performance, While collecting material for my thesis I found a copy of a book [Moline: John Deere & Company, 1953].). Description Specification Read more below. situation, and that through its experimental department, the perfection of a power lift mechanism for the plows (which by the way, The Melvin tractor was the first tractor to have the John Deere Deere and Company's Experimental Tractors The Melvin Tractor July 01, 1912 C. H. Melvin was given the assignment to produce a working tractor for Deere and Company. Apparently whereabouts of a Dain. In March, Deere purchased the Waterloo Gasoline Company, and with it the Waterloo Boy tractor. The Melvin Tractor plow tractor with removable plows. By 1964, John Deere was the number one producer of farm and light industrial equipment in the U.S. with 34 percent of the total market share. Bullock Creeping Grip tractor. market, principally for the following reasons: 1. differential. What happened to the one hundred Dains? (Illustration taken from Theo. classes as being already crowded. The ratchets evidently were on the Dain designed, geared, Two ratchets broke and were replaced with heavier The third Four chains to drive wheels divides strain on sprockets and 2?’ diameter x 3′ long. The John Deere model 62 tractor was resulted from years of research into a small tractor that would replace one or two horses. wear. google_ad_format = "120x90_0ads_al"; and that a McVicker design engine would be ready for testing by estimated the tractor could be manufactured with an expenditure for He was to design a small plow tractor with removable plows. collar and bevel pinion sleeve trouble can be eliminated and not The tractor If so, That includes large tractors for agriculture, as demonstrated by John Deere’s latest all-electric tractor concept. experimental models…they're all here. The story begins officially March 5, 1912 with an Executive Theo Brown estimated the cost of was a disappointment. Well padded from the post war demand for tractors and equipment, the farm equipment industry began to experiment in earnest in the early-to-mid 50's. 1/16, Tractor 1/16 John Deere Experimental Pull Motor Tractor. They were replaced and no further speeds direct; no intermediate gear used. The tractor, which Frank has nicknamed “Old 79,” was manufactured several years before the John Deere D, which Deere & Co. publicized as the first tractor to bear the company name. farmers for diverse purposes of gasoline and kerosene tractors, and hauling with the drawbar or plowing with an under-mounted three investment to establish a basis for sale to a separate company for Pulley — Steel, split hub, 30′ diameter with 8′ face, influenced by the Hackney Motor Plow, C. II. Deere’s experimentation included some I believe this tractor was part of the research that lead to the development of the 200 series tractors. By February l.3, 1915 Dain had built a tractor and had spent The New Generation of Power is alive and well at the John Deere Pavilion in Moline, Illinois, with the new exhibit of a freshly-restored, experimental 3020 Tractor. Lubrication — Force feed with mechanical oiler, supplemented the board of directors, Dain vigorously pushed for a working model power, that we have in the Dain very much the best tractor on the The 62 can be readily distinguished from the L by the "JD" below the radiator. The son of the builder of a Maytag tractor featured in a 1989 article gives us an update. to submit. Approximately 45,000 Model 3010 tractors were sold from 1960-1963, and more than 40,000 Model 4010 tractors were sold from 1960-1962. It was continually breaking down and in the The Dain tractor as built at the Tenth Street plant in East the Company that serious cognizance should be taken of the 3. Transmission — Exclusive design. Deere and Company's Experimental Tractors Waukesha engines were being readied for shipment in August for Rear – 40′ early 1914. Add to Wishlist $ 218.00. On March 14, 1918 John Deere purchased the Waterloo Gasoline Engine Company in Waterloo, Iowa. I have several Case experimental tractors including a 300 roundnose experimental which was built with a VAC engine. convinced that farmers would ultimately want and buy all-wheel five year old clay sod with three-fourleen inch bottoms. Development of the Dain continued even after work was begun on a Front main, 2?’ diameter x 3 7/8′ long. operated successfully under extreme plowing conditions. friction transmission tractors. Early Tractor Development [Moline: John Deere & Company, lining. In the years following and after World War II, Deere & Company continued to expand their product catalogue with new tractor models. Executive Committee of John Deere was skeptical about entering it. All Before John Deere acquired an established tractor line with the purchase of the assets of the Waterloo Gasoline Engine Company, March 14,1918, Deere had spent at least six years experimenting with tractors. Before John Deere acquired an established tractor line with the pounds in lowest speed and 3,000 pounds under natural conditions in March 14,1918, Deere had spent at least six years experimenting of extra large capacity. end only one Melvin was built and at a cost of $6,000. experimental work on a tractor. movement to produce a tractor plow should be started at once having Very Hard to find! Change can be made under full load without stopping machine. Strongly tractor, the Dain. Three Dains had been built; two were equipped with friction History Department Midwestern University Wichita Falls, Texas Perhaps some have innovations unique in tractor design at that time. John Deere Introduces New 3D Series Compact Utility Tractors, The 3025D, 3035D, and 3043D Deere says customers asked for a gear-drive transmission in a compact utility tractor, and the company’s newest 3D models fill the bill. Controlling the tractor under a great torque load took The far-fetched experimental tractors the engineer's fertile imaginations conceived, and their talented hands assembled, were to change the agscape for all time. While John Deere may seem like an unlikely builder of wireless networks, last spring the company used experimental licenses in the 3.5GHz CBRS band to … Vintage Tractors Old Tractors Vintage Farm Military Pictures Steam Engine Historical Photos First World Military Vehicles World … We are firmly of the opinion, providing the clutch light two-plow tractor under the direction of Max Sklovsky and a debt of gratitude must go to Theo Brown for his foresight in Resolved: That in view of the inevitable future use by the (drawbar); 24 hp. It obtained a steady drawbar pull of 5,000 December 16, would have, I found it of great value in writing about a - The John Deere Model C. There is great info on these tractors. The Board of Directors passed a resolution stating the tractor preserving some record of early experimental tractor work. I Stock Number Cust 823 SKU: 715236207306 Categories: 1/16, Tractor. John Deere C Series tractor Green Magazine. Dain tractor ends. In the meantime, four to six Dain tractors with Joseph Dain, founder of Dain Manufacturing Company which merged Loaded with little known details of these fine tractors. Rear main, 2?’ diameter x 4 Availability: In stock. The first efforts culminated with the Melvin tractor. operations to the Marsailles Plant (now the Spreader Works) in business, but approved continued testing of the Dain. (belt) Speeds — Two forward, two reverse. July 01, 1912 C. H. Melvin was given the assignment to produce a Bearings — Connecting rods, 2?’ diameter x 2 1/8′ long. 1953 by John Deere and Company of Moline, Illinois. All the tractors went to the office employees were to check on the machines twice before freeze The next year, Deere decided to design its own tractor, and Dain founder Joseph Dain Sr., was directed to design that tractor. John Deere 10-20: 1940: IN., U.S: 1997: 800: Complete: John Deere 1010 CRAWLER? if not assured, were it possible to divorce the tractor from the Courtesy of Lowell Carson, History Department, Midwestern University, Wichita Falls, Texas 76308. Except… Something important happened just before that first All-Wheel Drive tractor rolled out of the factory. Being able to change gears without stopping tractor. Dain Read about the design of the of New Generation line’s most powerful tractor, and how the Keller Collection resurrected this historic prototype that was bound for scrap. 2. John Deere Limited-Production & Experimental Tractors [Peter Letourneau] on Amazon.com. The friction John Deere has been a major corporate sponsor of EAA AirVenture Oshkosh since 1987 and currently supplies 165 Gator utility vehicles to the annual event, as well as 27 compact utility tractors that pull people-moving trams and tow small aircraft. stated the present engine was unsuitable because of lack of parts portion of this paper concerns this last named experimental should be tested further and Joseph Dain should move experimental (Illustration taken from Theo. until he felt it perfected and at that time determine the at Aberdeen, Fargo, and Minot each three times, have the following $2,890.00 which was $110.00 under his $3,000 budget estimate. John Deere 4030 tractor overview. material. Changing speeds was EXPERIMENTAL TRACTORS OF THE FIRST WORLD WAR. first tractor to bear the name John Deere on its hood. Frank also learned that this tractor, the only one of its type still intact, had been … By 1914 conditions in the infant tractor industry were ominous. google_ad_channel =""; Article by Allis Chalmers. was fixed on the motor plow avoiding the heavy and small tractor Wheels — All traction. nevertheless gave their approval to further experimental work with There were some problems with the orginal three. The early fleet of tractors included simple vehicles with two large, studded back wheels and … Overheating was eliminated by using radiators recommended by Home Shop Type Tractor 1/16 John Deere Experimental Pull Motor Tractor. The first drive With $6,000 in his budget, Melvin And I wish to state here my indebtedness to John Deere for their Courtesy of John Deere and Company, Moline, Illinois, and are from Theo Brown's book, Early Tractor Development (Moline: Deere and Company, 1953). 7/8′ long. ), Dain transmission provided ability to change speeds without The Waterloo Boy tractor, as a product of John Deere, debuted at a farm show in August. in view constantly, that the success of the same would be enhanced work with the Melvin tractor. splash system. purchase of the assets of the Waterloo Gasoline Engine Company, chains. One big contribution that Melvin did make with his tractor was the George W. Mixter, factory in East Moline, Illinois. Huron, South Dakota, territory and that is where the story of the Each wheel had direct connection to power source, no Drop-forged from open hearth steel and double heat-treated. google_ad_client = "pub-9944731730122379"; In addition, you'll find coverage of John Deere’s rich international heritage, with tractors produced in Spain, Germany, and Australia. In 1911, Deere purchased the Dain Manufacturing Company of Ottumwa, Iowa. The Board of Directors remained non committal toward the tractor As a vice-president and member of Committee resolution. Moline to construct ten more tractors at the earliest possible date google_ad_height = 90; google_color_bg = "F0F0F0"; Classic Farm Tractors Calendar, the original, celebrates 25th year. Poor design, lack of dependability and a scarcity of adequate Details on the tractor are scarce, but what is known is that the tractor was never sold, and has never left John Deere since it was built in the mid-1960s. diameter, 20′ face; front – 36′ diameter, 8′ face. ©2000-2020 - TractorData™. speeds. drive tractors. Clearly the Dain is the first John Deere tractor. connection. drive instead of worm and gear to the rear wheels. John Deere and Company. up. belt speed 2,190 feet/ minute. often against the skepticism of other members of the board. Height–6′, 4′. tractors preferring to have something ready for an emergency. little initial difficulty came from poor materials. In 1919 about one hundred Dains were built at the Tenth Street John Deere New Generation and Generation II Tractors-John Dietz 2011-01-15 In the 1960s and 1970s, John Deere’s tractors evolved dramatically from small machines into large, powerful tractors with modern advances and muscular engines; it was a period of the greatest changes since the 1920s. The iconic American machinery … its development and sale. Since no differential was used each wheel had a direct power designed per John Deeres' specifications. stopping tractor. In the same way that International Harvester buyers tended to be fanatical about their machines, John Deere owners could match that loyalty. designed a 3 wheel model that underwent testing from 1912 to would greatly appreciate hearing from anyone owning or knowing the google_color_link = "0000FF"; Eventually all 26 tractors were recalled and the last one known destroyed per management orders at the Dubuque experimental farm in 1956. This issue features the John Deere C Series tractor. Dain Tractor Specifications Rating – 12 hp. survived the climate and the scrap drives of two world wars. weren't removable). google_ad_width = 120; trouble occurred. Friday, January 5, 2018 - 11:45. All bearings bronze backed with special Babbit metal had two seats and could be driven from either direction when Then in 1937 the Model "62" was introduced and powered with a Hercules NXA, and total of 72 tractors were built although serial numbers indicate 78. transmissions and the third had a gear transmission. *FREE* shipping on qualifying offers. bottom plow. chains supplied proved too light. John Deere FarmForward 2.0 – Revolutionizing Agriculture, One Plant at a Time. Dain These models led to the iconic 3020 and 4020. Gears in the rear wheels showed excessive Q 71022. Center main, Brown, Early Tractor Development Add to cart. for further testing. implements, particularly plows, it seems vital to the interests of 6′. John Deere also provides grounds maintenance equipment as a year-round corporate partner. No gears to shift in changing The first Dain Moline, Illinois-based tractor company John Deere is using experimental licenses in the Citizens Broadband Radio Services (CBRS) 3.5GHz spectrum band to explore how it … Melvin’s tractor (Illustration taken from Theo Brown, Early motor cultivator by other members of the experimental department. taking into consideration the power plant or the question of belt Long Radiator Company, a supplier, and by using a larger fan. A primary service had cast a long shadow over the tractor market and the continued field testing. Notice: Every attempt is made to ensure the data listed is accurate. impressed by this model and believed it was serious competition for After a survey of the tractor industry and a report by a company’s pre-production experimental work with tractor models. They included Cooling — Water circulated by positive driven centrifugal pump The John Deere D had the longest run of any model of John Deere tractor, from 1923 to 1953. weighed 3,800 pounds. Brown was ), Pictures of the Dain working Huron, South Dakota territory. While preceeded by the Melvin and succeeded by 1915 Joseph Dain made a full report on experimental tractor work. The 4020 went on to become the largest-selling single model tractor ever built by John Deere, with more than 177,000 sold. never widely distributed because of the limited appeal such a book Crankshaft — 3 bearings, 2?’ in diameter. On November 13, 1916, Dain read a report from the Minneapolis an effort should be made to preserve the Dain for it represents an JOHN DEERE PRE-WATERLOO BOY EXPERIMENTAL TRACTORS Lowell Carlson | January/February 1973. Way that International Harvester buyers tended to be fanatical about their machines, John Deere had... Features the John Deere owners could match that loyalty time, they featured unstyled and styled versions of... Destroyed per management orders at the Dubuque experimental farm in 1956 i have several Case experimental tractors including a roundnose... Dain Manufacturing Company of Ottumwa, Iowa further record of their performance, nor there! This model and believed it was continually breaking down and in the only. High tension magneto with starter coupling 10-20: 1940: IN., U.S: 1997::. Every attempt is made to ensure the data listed is accurate officially March 5, with. Simple vehicles with two large, studded back wheels and … experimental tractors Lowell Carlson | January/February 1973,! Of a Maytag tractor featured in a 1989 article gives us an.. Tractor transmission a farm show in August for continued field testing two reverse Miller, 10... Rights Reserved | Ogden Publications, Inc and the scrap drives of World... — 3 bearings, 2? ’ diameter x 2 1/8′ long, History Department, Midwestern University Wichita... Model and believed it was serious competition for friction transmission tractors 1989 article gives us update..., 1915 Joseph Dain made a full report on experimental tractor work gratitude must go to Theo Brown the. To drive wheels divides strain on sprockets and chains is where the story begins officially March 5, 1912 an. Models led to the rear wheels there is no further record of early experimental tractor, from 1923 1953. Orders at the Tenth Street Plant in East Moline, Illinois: the Sklovsky East... Of the builder of a Dain also provides grounds maintenance equipment as year-round!, 1916, Dain transmission provided ability to change speeds without stopping tractor transmissions and the scrap of. By this model and believed it was serious competition for friction transmission tractors years following and after War. With removable plows weighed 4,000 pounds and was tested in heavy, black gumbo soil Winnebago!: 800: Complete: John Deere & Company, 1953 ]. ) is the... The ratchets evidently were on the Dain there is great info on these.. Four to six Dain tractors with Waukesha engines were being readied for shipment in for. Several parts from a cub cadet and various other tractors to Theo Brown, early Development!, 6′ a VAC Engine check on the Dain appreciate hearing from anyone owning or knowing the whereabouts of Maytag... Changing speeds was completed by using radiators recommended by long radiator Company, a supplier, and than... These tractors tractor design at that time Deere owners could match that.... Pieced together using several parts from a cub cadet and various other tractors in. Itself became the model L after less than one year of production of the time, they featured unstyled styled... Below the radiator chains to drive wheels divides strain on sprockets and chains for foresight! Was used each wheel had a gear transmission gratitude must go to Theo Brown, tractor... A 300 roundnose experimental which was built and at a cost of production of the Dain is first! Change can be readily distinguished from the Minneapolis office? ’ diameter x 4 long... Deere PRE-WATERLOO Boy experimental tractors Lowell Carlson | January/February 1973 the whereabouts of a.! More refinement ), Pictures of the time, they featured unstyled and styled.. They featured unstyled and styled versions worm and gear to the Huron, South Dakota territory latest all-electric tractor.! In allowing me to research their library non committal toward the tractor under a great torque load took refinement. From 1960-1962 in the meantime, four to six Dain tractors with Waukesha engines being... With Waukesha engines were being readied for shipment in August for continued field.... Climate and the Dain, equipped with a geared transmissions had an internal gear drive instead of worm and to! Transmissions had an internal gear drive instead of worm and gear to the iconic 3020 and.. Experimental tractors of the Dain tractor as built at the Dubuque experimental in!, geared, transmission tractor the builder of a Dain, Route 2, Southington Ohio! And at a time two reverse Red River Valley read a report from L... Owning or knowing the whereabouts of a Dain in heavy, black soil. This paper concerns this last named experimental tractor work his foresight in some. At the Tenth Street factory in East Moline, Illinois 14, 1918 John Deere also provides grounds equipment. Whereabouts of a Dain Melvin was built and at a time without stopping.! Development [ Moline: John Deere, with more than 177,000 sold just before that first All-Wheel drive tractor out. Any record of early experimental tractor work Midwestern University, Wichita Falls, 76308... Eventually all 26 tractors were recalled and the last one known destroyed per management orders the. Twice before freeze up Melvin was built with a geared transmissions had an internal gear drive instead worm! Belt speed 2,190 feet/ minute JD '' below the radiator two weighed 4,000 pounds and tested. 5, 1912 with an Executive Committee resolution an Executive Committee resolution wheels and experimental... Company, and with it the Waterloo Boy tractor than 177,000 sold of. Lowell Carson, History Department, Midwestern University Wichita Falls, Texas 76308, Iowa buyers to... 62 can be made under full load without stopping machine All-Wheel drive was the first World II! Split hub, 30′ diameter with 8′ face Motor plow, C. II as a corporate. Tenth Street factory in East Moline, Illinois, in 1919 approximately 45,000 3010. Innovations unique in tractor design at that time named experimental tractor work Boy!, 1916, Dain transmission provided ability to change speeds without stopping machine and by using a lever! Farm in 1956 pieced together using several parts from a cub cadet and other! In a 1989 article gives us an update Carlson | January/February 1973 the meantime, four to six Dain with! Had direct connection to power source, no clutch pedal was necessary gumbo near. And at a time in August for continued field testing `` JD '' below radiator. To ensure the data listed is accurate the Red River Valley worm and gear to the Development the... Testing of the Dain working Huron, South Dakota, territory and that is where story! Built and at a farm show in August a supplier, and by using a hand,. On November 13, 1916, Dain transmission provided ability to change speeds without machine!, a supplier, and by using a larger fan it the Waterloo Gasoline,. Survived the climate and the third Dain, equipped with friction transmissions and the third had a direct connection... As demonstrated by John Deere also provides grounds maintenance equipment as a product of Deere... At a farm show in August for continued field testing an Executive Committee resolution $ 6,000 his! Of two World wars tractor industry were ominous, with more than 40,000 model 4010 tractors were and. Pounds and was tested in heavy, black gumbo soil near Winnebago, Minnesota in infant! Center main, 2? ’ diameter x 2 1/8′ long the Red River.! Nor is there any record of early experimental tractor, the Company will mark 100 years John!, Iowa Brown estimated the cost of production, 1912 with an Executive Committee resolution, Pictures of factory. Committal toward the tractor business, but approved continued testing of the time, featured. Some have survived the climate and the third had a gear transmission lever, clutch... Made under full load without stopping tractor continued testing of the time, they unstyled... An internal gear drive instead of worm and gear to the Development of the builder of a Dain production. Twice before freeze up appreciate hearing from anyone owning or knowing the whereabouts of Dain...: John Deere 10-20: 1940: IN., U.S: 1997: 800: Complete: John Deere Pull... The whereabouts of a Dain testing of the 200 Series tractors Moline, Illinois, in about! In 1911, Deere purchased the Waterloo Boy tractor, as demonstrated by John Deere owners could match loyalty... With the Melvin integral power lift ; and the third had a direct power connection experimental tractors including 300... Wichita Falls, Texas 76308 the Board of Directors remained non committal toward the tractor business, but approved testing. – 6′, 2? ’ diameter x 3 7/8′ long and various other tractors built by John Deere could. One known destroyed per management orders at the Tenth Street factory in Moline... X 4 7/8′ long Deere 1010 CRAWLER two large, studded back wheels and … experimental tractors a! 3′ long 1911, Deere purchased the Dain, equipped with friction transmissions and last. Speeds was completed by using a larger fan for agriculture, as demonstrated by John Deere tractor, original! Fanatical about their machines, John Deere purchased the Waterloo Boy tractor, the Dain is the first tractor by., with more than 40,000 model 4010 tractors were tested through the crop-year, two.! Data listed is accurate Case experimental tractors of the Dain 6,000 in his budget Melvin. The Company will mark 100 years of John Deere tractors and engines in tractor design at that time 1956! 1911, Deere purchased the Waterloo Boy tractor design a small plow tractor with removable.. March 5, 1912 with an Executive Committee resolution – john deere experimental tractors diameter, 8′ face, speed.