best thirty

Best Thirty tractor photo
1921 - 1925 Agricultural Crawler tractor
1921 - 1925
Agricultural Crawler tractor
1921 - 1925
Agricultural Crawler tractor
1921 - 1925
Agricultural Crawler tractor
Tractor Tests
NTTL 77: 2-speed crawler
NTTL 99: 2-speed crawler
NTTL 104: 3-speed crawler
Nebraska Tractor Test 77
2-speed crawler May 9 - 20, 1921 Link: Nebraska Tractor Test 77 file
Belt power (max)
30.43 hp 22.7 kW
Drawbar performance
Max power
24.53 hp 18.3 kW
Max pull
4343 lbs 1969 kg
Nebraska Tractor Test 99
2-speed crawler September 11 - 24, 1923 Link: Nebraska Tractor Test 99 file
Belt power (max)
32.55 hp 24.3 kW
Drawbar performance
Max power
25.96 hp 19.4 kW
Max pull
4930 lbs 2236 kg
Nebraska Tractor Test 104
3-speed crawler September 15 - 22, 1924 Link: Nebraska Tractor Test 104 file
Belt power (max)
37.83 hp 28.2 kW
Drawbar performance
Max power
33.21 hp 24.8 kW
Max pull
7563 lbs 3430 kg

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