APPENDIX I. 



Tabulation of Area and Perimeter Estimates with the 

 Ellipse Model Prepared by Williams and Duft for the 

 S-390 Fire Behavior Training Package 



Area Estimations for Point Source Fires: Area Estimations for Point Source Fires (continued): 



Spfeaij Effective windspeed, mi/h Spread Effective windspeed, mi/h 



distance 1 3 5 7 9 11 13 15 17 19 distance 1 3 5 7 9 11 13 15 17 19 



chains Acres chains Acres 



1 



.1 



.1 



.1 



00 



00 



00 



00 



00 



00 



00 



72 



614 



444 



330 



251 



194 



151 



119 



94 



75 



59 



2 



.5 



.3 



.3 



.3 



.2 



.1 



.1 



.1 



.1 



00 



74 



649 



469 



349 



265 



205 



160 



126 



99 



79 



63 



3 



1.1 



.8 



.6 



.4 



.3 



.3 



.2 



.2 



.1 



.1 



76 



684 



495 



368 



280 



216 



169 



133 



105 



83 



66 



4 



1.9 



1.4 



1 



.8 



.6 



.5 



.4 



.3 



.2 



.2 



78 



721 



521 



388 



295 



227 



178 



140 



111 



88 



70 



5 



2 



2 



1.6 



1.2 



.9 



.7 



.6 



.5 



.4 



.3 



80 



758 



549 



408 



310 



239 



187 



147 



116 



92 



73 



6 



4 



3 



2 



1.7 



1.3 



1.1 



.8 



.7 



.5 



.4 



82 



797 



576 



429 



326 



251 



196 



154 



122 



97 



77 



7 



5 



4 



3 



2 



1.8 



1.4 



1.1 



.9 



.7 



.6 



8 



7 



5 



4 



3 



2 



1.9 



1.5 



1.2 



.9 



.7 



9 



9 



6 



5 



3 



3 



2 



1.9 



1.5 



1.2 



.9 



10 



11 



8 



6 



4 



3 



2 



2 



1.8 



1.5 



1.2 



11 



14 



10 



7 



5 



4 



3 



2 



2 



1.8 



1.4 



12 



17 



12 



9 



6 



5 



4 



3 



2 



2 



1.7 



84 



836 



605 



450 



342 



264 



206 



162 



128 



102 



81 



86 



876 



634 



471 



358 



276 



216 



170 



135 



107 



85 



88 



917 



664 



494 



375 



290 



226 



178 



141 



112 



89 



90 



960 



694 



516 



392 



303 



237 



186 



147 



117 



93 



92 



1003 



726 



540 



410 



316 



247 



195 



154 



122 



97 



94 



1047 



758 



563 



428 



330 



258 



203 



161 



128 



10S 



13 



20 



14 



10 



8 



6 



4 



3 



3 



2 



2 



96 



1092 



790 



588 



446 



345 



269 



212 



168 



133 



106 



14 



23 



16 



12 



9 



7 



5 



4 



3 



2 



2 



98 



1138 



823 



612 



465 



359 



281 



221 



175 



139 



110 



15 



26 



19 



14 



10 



8 



6 



5 



4 



3 



2 



100 



1185 



857 



638 



484 



374 



292 



230 



182 



145 



115 



16 



30 



21 



16 



12 



9 



7 



5 



4 



3 



2 



105 



1306 



945 703 



534 



412 



322 



254 



201 



159 



127 



17 



34 



24 



18 



14 



10 



8 



6 



5 



4 



3 



110 



1434 



1038 772 



586 



453 



354 



278 



220 



175 



139 



18 



38 



27 



20 



15 



12 



9 



7 



5 



4 



3 



115 



1567 



1134 843 



641 



495 



386 



304 



241 



191 



152 



19 



42 



30 



23 



17 



13 



10 



8 



6 



5 



4 



20 



27 



34 



25 



19 



14 



11 



9 



7 



5 



4 



21 



52 



37 



28 



21 



16 



12 



10 



8 



6 



5 



22 



57 



41 



30 



23 



18 



14 



11 



8 



7 



5 



23 



62 



45 



33 



25 



19 



15 



12 



9 



7 



6 



24 



68 



49 



36 



27 



21 



16 



13 



10 



8 



6 



25 



74 



53 



39 



30 



23 



18 



14 



11 



9 



7 



26 



80 



57 



43 



32 



25 



19 



15 



12 



9 



7 



28 



92 



67 



50 



38 



29 



22 



18 



14 



11 



9 



30 



106 



77 



57 



43 



33 



26 



20 



16 



13 



10 



32 



121 



87 



65 



49 



38 



29 



23 



18 



14 



11 



34 



137 



99 



73 



56 



43 



33 



20 



21 



16 



13 



36 



153 



111 



82 



62 



48 



37 



29 



23 



18 



14 



38 



171 



123 



92 



70 



54 



42 



33 



26 



20 



16 



40 



189 



137 



102 



77 



59 



46 



36 



29 



23 



18 



42 



209 



151 



112 



85 



66 



51 



40 



32 



25 



20 



44 



229 



166 



123 



93 



72 



56 



44 



35 



28 



22 



46 



250 



181 



135 



102 



79 



61 



48 



38 



30 



24 



48 



273 



197 



147 



111 



86 



67 



53 



42 



33 



26 



50 



296 



214 



159 



121 



93 



73 



57 



45 



36 



28 



52 



320 



231 



172 



131 



101 



79 



62 



49 



39 



31 



54 



345 



250 



186 



141 



109 



85 



67 



53 



42 



33 



56 



371 



269 



200 



152 



117 



91 



72 



57 



45 



36 



58 



398 



288 



214 



163 



125 



93 



77 



61 



48 



38 



60 



426 



308 



229 



174 



134 



105 



82 



65 



52 



41 



62 



455 



329 



245 



186 



143 



112 



88 



70 



55 



44 



64 



485 



351 



261 



198 



153 



119 



94 



74 



59 



47 



66 



516 



373 



277 



211 



163 



127 



100 



79 



63 



50 



68 



548 



396 



295 



224 



173 



135 



106 



84 



67 



53 



70 



580 



420 



312 



237 



183 



143 



112 



89 



71 



56 



120 



1706 



1235 918 698 539 421 



331 



262 



208 



166 



125 



1852 



1340 997 757 585 457 



360 



285 



226 



180 



130 



2003 



1449 1078 819 632 494 



389 



308 



245 



195 



135 



2160 



1563 1163 883 682 533 



420 



332 



264 



210 



140 



2323 



1681 1250 950 734 573 



451 



357 



284 



226 



145 



2492 



1803 1341 1019 787 615 



484 



383 



304 



242 



150 



2667 



1930 1435 1091 842 658 



518 



410 



326 



259 



155 



2847 



2061 1533 1165 899 703 



553 



438 



348 



277 



160 



3034 



2196 1633 1241 958 749 



590 



467 



371 



295 



165 



3227 



2335 1737 1320 1019 796 



627 



496 



394 



314 



170 



3425 



2479 1844 1401 1082 845 



666 



527 



419 



333 



175 



3630 



2627 1954 1485 1146 896 



705 



559 



444 



353 



180 



3840 



2779 2067 1571 1213 948 



746 



591 



470 



374 



185 



4057 



2936 2184 1659 1281 1001 



788 



624 



496 



395 



190 



4279 



3097 2303 1750 1352 1056 832 



658 



523 



417 



195 



4507 



3262 2426 1844 1424 1112 876 



694 



551 



439 



200 



4741 



3431 2552 1939 1498 1170 921 



730 



580 



462 



210 



5227 



3783 2814 2138 1651 1290 



1016 



804 



639 



509 



220 



5737 



4152 3086 2347 1812 1416 1115 883 



702 



559 



230 



6720 



4538 3375 2565 1981 1547 



1219 965 



767 



611 



240 



6827 



4941 3675 2793 2157 1685 1327 



1051 



835 



665 



250 



7408 



5362 3986 3031 2340 1828 1440 1140 906 



722 



260 



8013 



5799 4313 3278 2531 1978 1558 1233 980 



780 



270 



8641 



6254 4652 3535 2730 2133 1680 1330 1057 



842 



280 9293 6726 5003 3802 2936 2294 1807 1431 1137 905 

 290 9969 7215 5366 4078 3149 2460 1938 1535 1219 971 

 300 10668 7721 5743 4364 3370 2633 2074 1642 1305 1039 



NOTE: Interpolations will become less accurate at the lower end of this 

 table due to the greater spans between spread distance values 

 and the non-linear equations used to produce the table. Your 

 interpolated values may differ somewhat from those given by 

 the TI-59 calculator with CROfvl. 



22 



