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Some Effects of Altitude on LP-Gas Tractor Operation
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English
Abstract
Spark plug thermal characteristcs were investigated for both propane and butane at various altitudes. These tests show that under ordinary conditions, if the correct spark plug heat range is installed at sea level, the selection does not need to be changed for higher altitude operation.
Operating spark plug temperatures were lower with butane as compared with propane and may warrant, in some instances, a hotter heat range. Knock-limited spark advance increased with altitude, but decreased with increasing compression ratios. There is no significant spark plug voltage requirement change under running conditions, as altitude is increased from roughly sea level to 8000 ft.
Citation
Galster, G. and Pigott, J., "Some Effects of Altitude on LP-Gas Tractor Operation," SAE Technical Paper 670057, 1967, https://doi.org/10.4271/670057.Also In
References
- Galster G. M. Pigott, J. S. “LP-Gas Tractors Deserve Careful Spark Plug Selection.” Paper presented at SAE Mid-Year Meeting Detroit June 1966
- Galster, G. M. Garner, D. A. Buckley, E. D. “What Propane Engines Say About Spark Plugs.” SAE Trans. Vol. 74 1966 650253
- Armor, W. G. Ingerson, H. G. Hilf, A. G. Jobaris, J. N. Alquist, H. E. “LP-Gas Octane Numbers and Their Relationship to Engine Performance.” Paper presented at SAE Annual Meeting Detroit January 1959
- Galster G. M. Garner, D. A. “High Altitude Can Affect Automotive Ignition System Performance,” Paper presented at SAE Automotive Engineering Congress Detroit January 1967
- Adams W. E. Boldt, K. “What Engines Say About Propane Fuel Mixtures.” SAE Trans. Vol. 73 1965 718