Theoretical Speed Table
Selecting driveline components for your boat can be tricky business. Given the desired engine RPM, the table below presents multiple gear ratios, propeller pitches and resultant speeds. Given the desired speed, engine RPM for multiple ratios and pitches can be determined. Once you've got the RPM, ratio and pitch values selected, you can then proceed to input these values into the various online speed calculation websites and compare the results. The table below is based on information gleaned from Inboard Motor Installations written by Glen L. Witt and Ken Hankinson. It can be ordered through Glen-L's Bookstore. Usage notes are located at the bottom of this page.
Theoretical Speed Table |
Theoretical Speed = (propeller rpm * pitch * 60) / (12 * 5280) | | Slippage | Pitch | Engine RPM | Ratio | Shaft RPM | Theor. MPH | 10% | 20% | 30% | 40% | 50% |
12 | 1000 | 1.9:1 | 526. | 5.98 | 5.38 | 4.78 | 4.19 | 3.59 | 2.99 |
13 | 1000 | 1.9:1 | 526. | 6.48 | 5.83 | 5.18 | 4.54 | 3.89 | 3.24 |
14 | 1000 | 1.9:1 | 526. | 6.98 | 6.28 | 5.58 | 4.88 | 4.19 | 3.49 |
15 | 1000 | 1.9:1 | 526. | 7.48 | 6.73 | 5.98 | 5.23 | 4.49 | 3.74 |
16 | 1000 | 1.9:1 | 526. | 7.97 | 7.18 | 6.38 | 5.58 | 4.78 | 3.99 |
17 | 1000 | 1.9:1 | 526. | 8.47 | 7.63 | 6.78 | 5.93 | 5.08 | 4.24 |
18 | 1000 | 1.9:1 | 526. | 8.97 | 8.07 | 7.18 | 6.28 | 5.38 | 4.49 |
|
12 | 1100 | 1.9:1 | 579. | 6.58 | 5.92 | 5.26 | 4.61 | 3.95 | 3.29 |
13 | 1100 | 1.9:1 | 579. | 7.13 | 6.41 | 5.70 | 4.99 | 4.28 | 3.56 |
14 | 1100 | 1.9:1 | 579. | 7.68 | 6.91 | 6.14 | 5.37 | 4.61 | 3.84 |
15 | 1100 | 1.9:1 | 579. | 8.22 | 7.40 | 6.58 | 5.76 | 4.93 | 4.11 |
16 | 1100 | 1.9:1 | 579. | 8.77 | 7.89 | 7.02 | 6.14 | 5.26 | 4.39 |
17 | 1100 | 1.9:1 | 579. | 9.32 | 8.39 | 7.46 | 6.52 | 5.59 | 4.66 |
18 | 1100 | 1.9:1 | 579. | 9.87 | 8.88 | 7.89 | 6.91 | 5.92 | 4.93 |
|
12 | 1200 | 1.9:1 | 632. | 7.18 | 6.46 | 5.74 | 5.02 | 4.31 | 3.59 |
13 | 1200 | 1.9:1 | 632. | 7.78 | 7.00 | 6.22 | 5.44 | 4.67 | 3.89 |
14 | 1200 | 1.9:1 | 632. | 8.37 | 7.54 | 6.70 | 5.86 | 5.02 | 4.19 |
15 | 1200 | 1.9:1 | 632. | 8.97 | 8.07 | 7.18 | 6.28 | 5.38 | 4.49 |
16 | 1200 | 1.9:1 | 632. | 9.57 | 8.61 | 7.66 | 6.70 | 5.74 | 4.78 |
17 | 1200 | 1.9:1 | 632. | 10.17 | 9.15 | 8.13 | 7.12 | 6.10 | 5.08 |
18 | 1200 | 1.9:1 | 632. | 10.77 | 9.69 | 8.61 | 7.54 | 6.46 | 5.38 |
|
12 | 1300 | 1.9:1 | 684. | 7.78 | 7.00 | 6.22 | 5.44 | 4.67 | 3.89 |
13 | 1300 | 1.9:1 | 684. | 8.42 | 7.58 | 6.74 | 5.90 | 5.05 | 4.21 |
14 | 1300 | 1.9:1 | 684. | 9.07 | 8.16 | 7.26 | 6.35 | 5.44 | 4.54 |
15 | 1300 | 1.9:1 | 684. | 9.72 | 8.75 | 7.78 | 6.80 | 5.83 | 4.86 |
16 | 1300 | 1.9:1 | 684. | 10.37 | 9.33 | 8.29 | 7.26 | 6.22 | 5.18 |
17 | 1300 | 1.9:1 | 684. | 11.01 | 9.91 | 8.81 | 7.71 | 6.61 | 5.51 |
18 | 1300 | 1.9:1 | 684. | 11.66 | 10.50 | 9.33 | 8.16 | 7.00 | 5.83 |
|
12 | 1400 | 1.9:1 | 737. | 8.37 | 7.54 | 6.70 | 5.86 | 5.02 | 4.19 |
13 | 1400 | 1.9:1 | 737. | 9.07 | 8.16 | 7.26 | 6.35 | 5.44 | 4.54 |
14 | 1400 | 1.9:1 | 737. | 9.77 | 8.79 | 7.81 | 6.84 | 5.86 | 4.88 |
15 | 1400 | 1.9:1 | 737. | 10.47 | 9.42 | 8.37 | 7.33 | 6.28 | 5.23 |
16 | 1400 | 1.9:1 | 737. | 11.16 | 10.05 | 8.93 | 7.81 | 6.70 | 5.58 |
17 | 1400 | 1.9:1 | 737. | 11.86 | 10.68 | 9.49 | 8.30 | 7.12 | 5.93 |
18 | 1400 | 1.9:1 | 737. | 12.56 | 11.30 | 10.05 | 8.79 | 7.54 | 6.28 |
|
12 | 1500 | 1.9:1 | 789. | 8.97 | 8.07 | 7.18 | 6.28 | 5.38 | 4.49 |
13 | 1500 | 1.9:1 | 789. | 9.72 | 8.75 | 7.78 | 6.80 | 5.83 | 4.86 |
14 | 1500 | 1.9:1 | 789. | 10.47 | 9.42 | 8.37 | 7.33 | 6.28 | 5.23 |
15 | 1500 | 1.9:1 | 789. | 11.21 | 10.09 | 8.97 | 7.85 | 6.73 | 5.61 |
16 | 1500 | 1.9:1 | 789. | 11.96 | 10.77 | 9.57 | 8.37 | 7.18 | 5.98 |
17 | 1500 | 1.9:1 | 789. | 12.71 | 11.44 | 10.17 | 8.90 | 7.63 | 6.35 |
18 | 1500 | 1.9:1 | 789. | 13.46 | 12.11 | 10.77 | 9.42 | 8.07 | 6.73 |
|
12 | 1600 | 1.9:1 | 842. | 9.57 | 8.61 | 7.66 | 6.70 | 5.74 | 4.78 |
13 | 1600 | 1.9:1 | 842. | 10.37 | 9.33 | 8.29 | 7.26 | 6.22 | 5.18 |
14 | 1600 | 1.9:1 | 842. | 11.16 | 10.05 | 8.93 | 7.81 | 6.70 | 5.58 |
15 | 1600 | 1.9:1 | 842. | 11.96 | 10.77 | 9.57 | 8.37 | 7.18 | 5.98 |
16 | 1600 | 1.9:1 | 842. | 12.76 | 11.48 | 10.21 | 8.93 | 7.66 | 6.38 |
17 | 1600 | 1.9:1 | 842. | 13.56 | 12.20 | 10.85 | 9.49 | 8.13 | 6.78 |
18 | 1600 | 1.9:1 | 842. | 14.35 | 12.92 | 11.48 | 10.05 | 8.61 | 7.18 |
|
12 | 1700 | 1.9:1 | 895. | 10.17 | 9.15 | 8.13 | 7.12 | 6.10 | 5.08 |
13 | 1700 | 1.9:1 | 895. | 11.01 | 9.91 | 8.81 | 7.71 | 6.61 | 5.51 |
14 | 1700 | 1.9:1 | 895. | 11.86 | 10.68 | 9.49 | 8.30 | 7.12 | 5.93 |
15 | 1700 | 1.9:1 | 895. | 12.71 | 11.44 | 10.17 | 8.90 | 7.63 | 6.35 |
16 | 1700 | 1.9:1 | 895. | 13.56 | 12.20 | 10.85 | 9.49 | 8.13 | 6.78 |
17 | 1700 | 1.9:1 | 895. | 14.40 | 12.96 | 11.52 | 10.08 | 8.64 | 7.20 |
18 | 1700 | 1.9:1 | 895. | 15.25 | 13.73 | 12.20 | 10.68 | 9.15 | 7.63 |
|
12 | 1800 | 1.9:1 | 947. | 10.77 | 9.69 | 8.61 | 7.54 | 6.46 | 5.38 |
13 | 1800 | 1.9:1 | 947. | 11.66 | 10.50 | 9.33 | 8.16 | 7.00 | 5.83 |
14 | 1800 | 1.9:1 | 947. | 12.56 | 11.30 | 10.05 | 8.79 | 7.54 | 6.28 |
15 | 1800 | 1.9:1 | 947. | 13.46 | 12.11 | 10.77 | 9.42 | 8.07 | 6.73 |
16 | 1800 | 1.9:1 | 947. | 14.35 | 12.92 | 11.48 | 10.05 | 8.61 | 7.18 |
17 | 1800 | 1.9:1 | 947. | 15.25 | 13.73 | 12.20 | 10.68 | 9.15 | 7.63 |
18 | 1800 | 1.9:1 | 947. | 16.15 | 14.53 | 12.92 | 11.30 | 9.69 | 8.07 |
|
12 | 1900 | 1.9:1 | 1000. | 11.36 | 10.23 | 9.09 | 7.95 | 6.82 | 5.68 |
13 | 1900 | 1.9:1 | 1000. | 12.31 | 11.08 | 9.85 | 8.62 | 7.39 | 6.16 |
14 | 1900 | 1.9:1 | 1000. | 13.26 | 11.93 | 10.61 | 9.28 | 7.95 | 6.63 |
15 | 1900 | 1.9:1 | 1000. | 14.20 | 12.78 | 11.36 | 9.94 | 8.52 | 7.10 |
16 | 1900 | 1.9:1 | 1000. | 15.15 | 13.64 | 12.12 | 10.61 | 9.09 | 7.58 |
17 | 1900 | 1.9:1 | 1000. | 16.10 | 14.49 | 12.88 | 11.27 | 9.66 | 8.05 |
18 | 1900 | 1.9:1 | 1000. | 17.05 | 15.34 | 13.64 | 11.93 | 10.23 | 8.52 |
|
12 | 2000 | 1.9:1 | 1053. | 11.96 | 10.77 | 9.57 | 8.37 | 7.18 | 5.98 |
13 | 2000 | 1.9:1 | 1053. | 12.96 | 11.66 | 10.37 | 9.07 | 7.78 | 6.48 |
14 | 2000 | 1.9:1 | 1053. | 13.96 | 12.56 | 11.16 | 9.77 | 8.37 | 6.98 |
15 | 2000 | 1.9:1 | 1053. | 14.95 | 13.46 | 11.96 | 10.47 | 8.97 | 7.48 |
16 | 2000 | 1.9:1 | 1053. | 15.95 | 14.35 | 12.76 | 11.16 | 9.57 | 7.97 |
17 | 2000 | 1.9:1 | 1053. | 16.95 | 15.25 | 13.56 | 11.86 | 10.17 | 8.47 |
18 | 2000 | 1.9:1 | 1053. | 17.94 | 16.15 | 14.35 | 12.56 | 10.77 | 8.97 |
|
12 | 2100 | 1.9:1 | 1105. | 12.56 | 11.30 | 10.05 | 8.79 | 7.54 | 6.28 |
13 | 2100 | 1.9:1 | 1105. | 13.61 | 12.25 | 10.89 | 9.52 | 8.16 | 6.80 |
14 | 2100 | 1.9:1 | 1105. | 14.65 | 13.19 | 11.72 | 10.26 | 8.79 | 7.33 |
15 | 2100 | 1.9:1 | 1105. | 15.70 | 14.13 | 12.56 | 10.99 | 9.42 | 7.85 |
16 | 2100 | 1.9:1 | 1105. | 16.75 | 15.07 | 13.40 | 11.72 | 10.05 | 8.37 |
17 | 2100 | 1.9:1 | 1105. | 17.79 | 16.01 | 14.23 | 12.46 | 10.68 | 8.90 |
18 | 2100 | 1.9:1 | 1105. | 18.84 | 16.96 | 15.07 | 13.19 | 11.30 | 9.42 |
|
12 | 2200 | 1.9:1 | 1158. | 13.16 | 11.84 | 10.53 | 9.21 | 7.89 | 6.58 |
13 | 2200 | 1.9:1 | 1158. | 14.25 | 12.83 | 11.40 | 9.98 | 8.55 | 7.13 |
14 | 2200 | 1.9:1 | 1158. | 15.35 | 13.82 | 12.28 | 10.75 | 9.21 | 7.68 |
15 | 2200 | 1.9:1 | 1158. | 16.45 | 14.80 | 13.16 | 11.51 | 9.87 | 8.22 |
16 | 2200 | 1.9:1 | 1158. | 17.54 | 15.79 | 14.04 | 12.28 | 10.53 | 8.77 |
17 | 2200 | 1.9:1 | 1158. | 18.64 | 16.78 | 14.91 | 13.05 | 11.18 | 9.32 |
18 | 2200 | 1.9:1 | 1158. | 19.74 | 17.76 | 15.79 | 13.82 | 11.84 | 9.87 |
|
12 | 2300 | 1.9:1 | 1211. | 13.76 | 12.38 | 11.00 | 9.63 | 8.25 | 6.88 |
13 | 2300 | 1.9:1 | 1211. | 14.90 | 13.41 | 11.92 | 10.43 | 8.94 | 7.45 |
14 | 2300 | 1.9:1 | 1211. | 16.05 | 14.44 | 12.84 | 11.23 | 9.63 | 8.02 |
15 | 2300 | 1.9:1 | 1211. | 17.19 | 15.48 | 13.76 | 12.04 | 10.32 | 8.60 |
16 | 2300 | 1.9:1 | 1211. | 18.34 | 16.51 | 14.67 | 12.84 | 11.00 | 9.17 |
17 | 2300 | 1.9:1 | 1211. | 19.49 | 17.54 | 15.59 | 13.64 | 11.69 | 9.74 |
18 | 2300 | 1.9:1 | 1211. | 20.63 | 18.57 | 16.51 | 14.44 | 12.38 | 10.32 |
|
12 | 2400 | 1.9:1 | 1263. | 14.35 | 12.92 | 11.48 | 10.05 | 8.61 | 7.18 |
13 | 2400 | 1.9:1 | 1263. | 15.55 | 14.00 | 12.44 | 10.89 | 9.33 | 7.78 |
14 | 2400 | 1.9:1 | 1263. | 16.75 | 15.07 | 13.40 | 11.72 | 10.05 | 8.37 |
15 | 2400 | 1.9:1 | 1263. | 17.94 | 16.15 | 14.35 | 12.56 | 10.77 | 8.97 |
16 | 2400 | 1.9:1 | 1263. | 19.14 | 17.22 | 15.31 | 13.40 | 11.48 | 9.57 |
17 | 2400 | 1.9:1 | 1263. | 20.33 | 18.30 | 16.27 | 14.23 | 12.20 | 10.17 |
18 | 2400 | 1.9:1 | 1263. | 21.53 | 19.38 | 17.22 | 15.07 | 12.92 | 10.77 |
|
12 | 2500 | 1.9:1 | 1316. | 14.95 | 13.46 | 11.96 | 10.47 | 8.97 | 7.48 |
13 | 2500 | 1.9:1 | 1316. | 16.20 | 14.58 | 12.96 | 11.34 | 9.72 | 8.10 |
14 | 2500 | 1.9:1 | 1316. | 17.44 | 15.70 | 13.96 | 12.21 | 10.47 | 8.72 |
15 | 2500 | 1.9:1 | 1316. | 18.69 | 16.82 | 14.95 | 13.08 | 11.21 | 9.35 |
16 | 2500 | 1.9:1 | 1316. | 19.94 | 17.94 | 15.95 | 13.96 | 11.96 | 9.97 |
17 | 2500 | 1.9:1 | 1316. | 21.18 | 19.06 | 16.95 | 14.83 | 12.71 | 10.59 |
18 | 2500 | 1.9:1 | 1316. | 22.43 | 20.19 | 17.94 | 15.70 | 13.46 | 11.21 |
|
12 | 2600 | 1.9:1 | 1368. | 15.55 | 14.00 | 12.44 | 10.89 | 9.33 | 7.78 |
13 | 2600 | 1.9:1 | 1368. | 16.85 | 15.16 | 13.48 | 11.79 | 10.11 | 8.42 |
14 | 2600 | 1.9:1 | 1368. | 18.14 | 16.33 | 14.51 | 12.70 | 10.89 | 9.07 |
15 | 2600 | 1.9:1 | 1368. | 19.44 | 17.49 | 15.55 | 13.61 | 11.66 | 9.72 |
16 | 2600 | 1.9:1 | 1368. | 20.73 | 18.66 | 16.59 | 14.51 | 12.44 | 10.37 |
17 | 2600 | 1.9:1 | 1368. | 22.03 | 19.83 | 17.62 | 15.42 | 13.22 | 11.01 |
18 | 2600 | 1.9:1 | 1368. | 23.33 | 20.99 | 18.66 | 16.33 | 14.00 | 11.66 |
|
12 | 2700 | 1.9:1 | 1421. | 16.15 | 14.53 | 12.92 | 11.30 | 9.69 | 8.07 |
13 | 2700 | 1.9:1 | 1421. | 17.49 | 15.74 | 14.00 | 12.25 | 10.50 | 8.75 |
14 | 2700 | 1.9:1 | 1421. | 18.84 | 16.96 | 15.07 | 13.19 | 11.30 | 9.42 |
15 | 2700 | 1.9:1 | 1421. | 20.19 | 18.17 | 16.15 | 14.13 | 12.11 | 10.09 |
16 | 2700 | 1.9:1 | 1421. | 21.53 | 19.38 | 17.22 | 15.07 | 12.92 | 10.77 |
17 | 2700 | 1.9:1 | 1421. | 22.88 | 20.59 | 18.30 | 16.01 | 13.73 | 11.44 |
18 | 2700 | 1.9:1 | 1421. | 24.22 | 21.80 | 19.38 | 16.96 | 14.53 | 12.11 |
|
12 | 2800 | 1.9:1 | 1474. | 16.75 | 15.07 | 13.40 | 11.72 | 10.05 | 8.37 |
13 | 2800 | 1.9:1 | 1474. | 18.14 | 16.33 | 14.51 | 12.70 | 10.89 | 9.07 |
14 | 2800 | 1.9:1 | 1474. | 19.54 | 17.58 | 15.63 | 13.68 | 11.72 | 9.77 |
15 | 2800 | 1.9:1 | 1474. | 20.93 | 18.84 | 16.75 | 14.65 | 12.56 | 10.47 |
16 | 2800 | 1.9:1 | 1474. | 22.33 | 20.10 | 17.86 | 15.63 | 13.40 | 11.16 |
17 | 2800 | 1.9:1 | 1474. | 23.72 | 21.35 | 18.98 | 16.61 | 14.23 | 11.86 |
18 | 2800 | 1.9:1 | 1474. | 25.12 | 22.61 | 20.10 | 17.58 | 15.07 | 12.56 |
|
12 | 2900 | 1.9:1 | 1526. | 17.34 | 15.61 | 13.88 | 12.14 | 10.41 | 8.67 |
13 | 2900 | 1.9:1 | 1526. | 18.79 | 16.91 | 15.03 | 13.15 | 11.27 | 9.39 |
14 | 2900 | 1.9:1 | 1526. | 20.24 | 18.21 | 16.19 | 14.16 | 12.14 | 10.12 |
15 | 2900 | 1.9:1 | 1526. | 21.68 | 19.51 | 17.34 | 15.18 | 13.01 | 10.84 |
16 | 2900 | 1.9:1 | 1526. | 23.13 | 20.81 | 18.50 | 16.19 | 13.88 | 11.56 |
17 | 2900 | 1.9:1 | 1526. | 24.57 | 22.11 | 19.66 | 17.20 | 14.74 | 12.29 |
18 | 2900 | 1.9:1 | 1526. | 26.02 | 23.42 | 20.81 | 18.21 | 15.61 | 13.01 |
|
12 | 3000 | 1.9:1 | 1579. | 17.94 | 16.15 | 14.35 | 12.56 | 10.77 | 8.97 |
13 | 3000 | 1.9:1 | 1579. | 19.44 | 17.49 | 15.55 | 13.61 | 11.66 | 9.72 |
14 | 3000 | 1.9:1 | 1579. | 20.93 | 18.84 | 16.75 | 14.65 | 12.56 | 10.47 |
15 | 3000 | 1.9:1 | 1579. | 22.43 | 20.19 | 17.94 | 15.70 | 13.46 | 11.21 |
16 | 3000 | 1.9:1 | 1579. | 23.92 | 21.53 | 19.14 | 16.75 | 14.35 | 11.96 |
17 | 3000 | 1.9:1 | 1579. | 25.42 | 22.88 | 20.33 | 17.79 | 15.25 | 12.71 |
18 | 3000 | 1.9:1 | 1579. | 26.91 | 24.22 | 21.53 | 18.84 | 16.15 | 13.46 |
|
12 | 3100 | 1.9:1 | 1632. | 18.54 | 16.69 | 14.83 | 12.98 | 11.12 | 9.27 |
13 | 3100 | 1.9:1 | 1632. | 20.09 | 18.08 | 16.07 | 14.06 | 12.05 | 10.04 |
14 | 3100 | 1.9:1 | 1632. | 21.63 | 19.47 | 17.30 | 15.14 | 12.98 | 10.82 |
15 | 3100 | 1.9:1 | 1632. | 23.18 | 20.86 | 18.54 | 16.22 | 13.91 | 11.59 |
16 | 3100 | 1.9:1 | 1632. | 24.72 | 22.25 | 19.78 | 17.30 | 14.83 | 12.36 |
17 | 3100 | 1.9:1 | 1632. | 26.27 | 23.64 | 21.01 | 18.39 | 15.76 | 13.13 |
18 | 3100 | 1.9:1 | 1632. | 27.81 | 25.03 | 22.25 | 19.47 | 16.69 | 13.91 |
|
12 | 3200 | 1.9:1 | 1684. | 19.14 | 17.22 | 15.31 | 13.40 | 11.48 | 9.57 |
13 | 3200 | 1.9:1 | 1684. | 20.73 | 18.66 | 16.59 | 14.51 | 12.44 | 10.37 |
14 | 3200 | 1.9:1 | 1684. | 22.33 | 20.10 | 17.86 | 15.63 | 13.40 | 11.16 |
15 | 3200 | 1.9:1 | 1684. | 23.92 | 21.53 | 19.14 | 16.75 | 14.35 | 11.96 |
16 | 3200 | 1.9:1 | 1684. | 25.52 | 22.97 | 20.41 | 17.86 | 15.31 | 12.76 |
17 | 3200 | 1.9:1 | 1684. | 27.11 | 24.40 | 21.69 | 18.98 | 16.27 | 13.56 |
18 | 3200 | 1.9:1 | 1684. | 28.71 | 25.84 | 22.97 | 20.10 | 17.22 | 14.35 |
|
12 | 3300 | 1.9:1 | 1737. | 19.74 | 17.76 | 15.79 | 13.82 | 11.84 | 9.87 |
13 | 3300 | 1.9:1 | 1737. | 21.38 | 19.24 | 17.11 | 14.97 | 12.83 | 10.69 |
14 | 3300 | 1.9:1 | 1737. | 23.03 | 20.72 | 18.42 | 16.12 | 13.82 | 11.51 |
15 | 3300 | 1.9:1 | 1737. | 24.67 | 22.20 | 19.74 | 17.27 | 14.80 | 12.34 |
16 | 3300 | 1.9:1 | 1737. | 26.32 | 23.68 | 21.05 | 18.42 | 15.79 | 13.16 |
17 | 3300 | 1.9:1 | 1737. | 27.96 | 25.16 | 22.37 | 19.57 | 16.78 | 13.98 |
18 | 3300 | 1.9:1 | 1737. | 29.61 | 26.64 | 23.68 | 20.72 | 17.76 | 14.80 |
|
12 | 3400 | 1.9:1 | 1789. | 20.33 | 18.30 | 16.27 | 14.23 | 12.20 | 10.17 |
13 | 3400 | 1.9:1 | 1789. | 22.03 | 19.83 | 17.62 | 15.42 | 13.22 | 11.01 |
14 | 3400 | 1.9:1 | 1789. | 23.72 | 21.35 | 18.98 | 16.61 | 14.23 | 11.86 |
15 | 3400 | 1.9:1 | 1789. | 25.42 | 22.88 | 20.33 | 17.79 | 15.25 | 12.71 |
16 | 3400 | 1.9:1 | 1789. | 27.11 | 24.40 | 21.69 | 18.98 | 16.27 | 13.56 |
17 | 3400 | 1.9:1 | 1789. | 28.81 | 25.93 | 23.05 | 20.17 | 17.28 | 14.40 |
18 | 3400 | 1.9:1 | 1789. | 30.50 | 27.45 | 24.40 | 21.35 | 18.30 | 15.25 |
|
12 | 3500 | 1.9:1 | 1842. | 20.93 | 18.84 | 16.75 | 14.65 | 12.56 | 10.47 |
13 | 3500 | 1.9:1 | 1842. | 22.68 | 20.41 | 18.14 | 15.87 | 13.61 | 11.34 |
14 | 3500 | 1.9:1 | 1842. | 24.42 | 21.98 | 19.54 | 17.10 | 14.65 | 12.21 |
15 | 3500 | 1.9:1 | 1842. | 26.17 | 23.55 | 20.93 | 18.32 | 15.70 | 13.08 |
16 | 3500 | 1.9:1 | 1842. | 27.91 | 25.12 | 22.33 | 19.54 | 16.75 | 13.96 |
17 | 3500 | 1.9:1 | 1842. | 29.66 | 26.69 | 23.72 | 20.76 | 17.79 | 14.83 |
18 | 3500 | 1.9:1 | 1842. | 31.40 | 28.26 | 25.12 | 21.98 | 18.84 | 15.70 |
|
12 | 3600 | 1.9:1 | 1895. | 21.53 | 19.38 | 17.22 | 15.07 | 12.92 | 10.77 |
13 | 3600 | 1.9:1 | 1895. | 23.33 | 20.99 | 18.66 | 16.33 | 14.00 | 11.66 |
14 | 3600 | 1.9:1 | 1895. | 25.12 | 22.61 | 20.10 | 17.58 | 15.07 | 12.56 |
15 | 3600 | 1.9:1 | 1895. | 26.91 | 24.22 | 21.53 | 18.84 | 16.15 | 13.46 |
16 | 3600 | 1.9:1 | 1895. | 28.71 | 25.84 | 22.97 | 20.10 | 17.22 | 14.35 |
17 | 3600 | 1.9:1 | 1895. | 30.50 | 27.45 | 24.40 | 21.35 | 18.30 | 15.25 |
18 | 3600 | 1.9:1 | 1895. | 32.30 | 29.07 | 25.84 | 22.61 | 19.38 | 16.15 |
|
12 | 3700 | 1.9:1 | 1947. | 22.13 | 19.92 | 17.70 | 15.49 | 13.28 | 11.06 |
13 | 3700 | 1.9:1 | 1947. | 23.97 | 21.58 | 19.18 | 16.78 | 14.38 | 11.99 |
14 | 3700 | 1.9:1 | 1947. | 25.82 | 23.24 | 20.65 | 18.07 | 15.49 | 12.91 |
15 | 3700 | 1.9:1 | 1947. | 27.66 | 24.90 | 22.13 | 19.36 | 16.60 | 13.83 |
16 | 3700 | 1.9:1 | 1947. | 29.51 | 26.56 | 23.60 | 20.65 | 17.70 | 14.75 |
17 | 3700 | 1.9:1 | 1947. | 31.35 | 28.21 | 25.08 | 21.94 | 18.81 | 15.67 |
18 | 3700 | 1.9:1 | 1947. | 33.19 | 29.87 | 26.56 | 23.24 | 19.92 | 16.60 |
|
12 | 3800 | 1.9:1 | 2000. | 22.73 | 20.45 | 18.18 | 15.91 | 13.64 | 11.36 |
13 | 3800 | 1.9:1 | 2000. | 24.62 | 22.16 | 19.70 | 17.23 | 14.77 | 12.31 |
14 | 3800 | 1.9:1 | 2000. | 26.52 | 23.86 | 21.21 | 18.56 | 15.91 | 13.26 |
15 | 3800 | 1.9:1 | 2000. | 28.41 | 25.57 | 22.73 | 19.89 | 17.05 | 14.20 |
16 | 3800 | 1.9:1 | 2000. | 30.30 | 27.27 | 24.24 | 21.21 | 18.18 | 15.15 |
17 | 3800 | 1.9:1 | 2000. | 32.20 | 28.98 | 25.76 | 22.54 | 19.32 | 16.10 |
18 | 3800 | 1.9:1 | 2000. | 34.09 | 30.68 | 27.27 | 23.86 | 20.45 | 17.05 |
|
12 | 3900 | 1.9:1 | 2053. | 23.33 | 20.99 | 18.66 | 16.33 | 14.00 | 11.66 |
13 | 3900 | 1.9:1 | 2053. | 25.27 | 22.74 | 20.22 | 17.69 | 15.16 | 12.63 |
14 | 3900 | 1.9:1 | 2053. | 27.21 | 24.49 | 21.77 | 19.05 | 16.33 | 13.61 |
15 | 3900 | 1.9:1 | 2053. | 29.16 | 26.24 | 23.33 | 20.41 | 17.49 | 14.58 |
16 | 3900 | 1.9:1 | 2053. | 31.10 | 27.99 | 24.88 | 21.77 | 18.66 | 15.55 |
17 | 3900 | 1.9:1 | 2053. | 33.04 | 29.74 | 26.44 | 23.13 | 19.83 | 16.52 |
18 | 3900 | 1.9:1 | 2053. | 34.99 | 31.49 | 27.99 | 24.49 | 20.99 | 17.49 |
|
12 | 4000 | 1.9:1 | 2105. | 23.92 | 21.53 | 19.14 | 16.75 | 14.35 | 11.96 |
13 | 4000 | 1.9:1 | 2105. | 25.92 | 23.33 | 20.73 | 18.14 | 15.55 | 12.96 |
14 | 4000 | 1.9:1 | 2105. | 27.91 | 25.12 | 22.33 | 19.54 | 16.75 | 13.96 |
15 | 4000 | 1.9:1 | 2105. | 29.90 | 26.91 | 23.92 | 20.93 | 17.94 | 14.95 |
16 | 4000 | 1.9:1 | 2105. | 31.90 | 28.71 | 25.52 | 22.33 | 19.14 | 15.95 |
17 | 4000 | 1.9:1 | 2105. | 33.89 | 30.50 | 27.11 | 23.72 | 20.33 | 16.95 |
18 | 4000 | 1.9:1 | 2105. | 35.89 | 32.30 | 28.71 | 25.12 | 21.53 | 17.94 |
|
12 | 4100 | 1.9:1 | 2158. | 24.52 | 22.07 | 19.62 | 17.17 | 14.71 | 12.26 |
13 | 4100 | 1.9:1 | 2158. | 26.56 | 23.91 | 21.25 | 18.60 | 15.94 | 13.28 |
14 | 4100 | 1.9:1 | 2158. | 28.61 | 25.75 | 22.89 | 20.03 | 17.17 | 14.30 |
15 | 4100 | 1.9:1 | 2158. | 30.65 | 27.59 | 24.52 | 21.46 | 18.39 | 15.33 |
16 | 4100 | 1.9:1 | 2158. | 32.70 | 29.43 | 26.16 | 22.89 | 19.62 | 16.35 |
17 | 4100 | 1.9:1 | 2158. | 34.74 | 31.26 | 27.79 | 24.32 | 20.84 | 17.37 |
18 | 4100 | 1.9:1 | 2158. | 36.78 | 33.10 | 29.43 | 25.75 | 22.07 | 18.39 |
|
12 | 4200 | 1.9:1 | 2211. | 25.12 | 22.61 | 20.10 | 17.58 | 15.07 | 12.56 |
13 | 4200 | 1.9:1 | 2211. | 27.21 | 24.49 | 21.77 | 19.05 | 16.33 | 13.61 |
14 | 4200 | 1.9:1 | 2211. | 29.31 | 26.38 | 23.44 | 20.51 | 17.58 | 14.65 |
15 | 4200 | 1.9:1 | 2211. | 31.40 | 28.26 | 25.12 | 21.98 | 18.84 | 15.70 |
16 | 4200 | 1.9:1 | 2211. | 33.49 | 30.14 | 26.79 | 23.44 | 20.10 | 16.75 |
17 | 4200 | 1.9:1 | 2211. | 35.59 | 32.03 | 28.47 | 24.91 | 21.35 | 17.79 |
18 | 4200 | 1.9:1 | 2211. | 37.68 | 33.91 | 30.14 | 26.38 | 22.61 | 18.84 |
|
12 | 4300 | 1.9:1 | 2263. | 25.72 | 23.15 | 20.57 | 18.00 | 15.43 | 12.86 |
13 | 4300 | 1.9:1 | 2263. | 27.86 | 25.07 | 22.29 | 19.50 | 16.72 | 13.93 |
14 | 4300 | 1.9:1 | 2263. | 30.00 | 27.00 | 24.00 | 21.00 | 18.00 | 15.00 |
15 | 4300 | 1.9:1 | 2263. | 32.15 | 28.93 | 25.72 | 22.50 | 19.29 | 16.07 |
16 | 4300 | 1.9:1 | 2263. | 34.29 | 30.86 | 27.43 | 24.00 | 20.57 | 17.15 |
17 | 4300 | 1.9:1 | 2263. | 36.43 | 32.79 | 29.15 | 25.50 | 21.86 | 18.22 |
18 | 4300 | 1.9:1 | 2263. | 38.58 | 34.72 | 30.86 | 27.00 | 23.15 | 19.29 |
|
12 | 4400 | 1.9:1 | 2316. | 26.32 | 23.68 | 21.05 | 18.42 | 15.79 | 13.16 |
13 | 4400 | 1.9:1 | 2316. | 28.51 | 25.66 | 22.81 | 19.96 | 17.11 | 14.25 |
14 | 4400 | 1.9:1 | 2316. | 30.70 | 27.63 | 24.56 | 21.49 | 18.42 | 15.35 |
15 | 4400 | 1.9:1 | 2316. | 32.89 | 29.61 | 26.32 | 23.03 | 19.74 | 16.45 |
16 | 4400 | 1.9:1 | 2316. | 35.09 | 31.58 | 28.07 | 24.56 | 21.05 | 17.54 |
17 | 4400 | 1.9:1 | 2316. | 37.28 | 33.55 | 29.82 | 26.10 | 22.37 | 18.64 |
18 | 4400 | 1.9:1 | 2316. | 39.47 | 35.53 | 31.58 | 27.63 | 23.68 | 19.74 |
|
12 | 4500 | 1.9:1 | 2368. | 26.91 | 24.22 | 21.53 | 18.84 | 16.15 | 13.46 |
13 | 4500 | 1.9:1 | 2368. | 29.16 | 26.24 | 23.33 | 20.41 | 17.49 | 14.58 |
14 | 4500 | 1.9:1 | 2368. | 31.40 | 28.26 | 25.12 | 21.98 | 18.84 | 15.70 |
15 | 4500 | 1.9:1 | 2368. | 33.64 | 30.28 | 26.91 | 23.55 | 20.19 | 16.82 |
16 | 4500 | 1.9:1 | 2368. | 35.89 | 32.30 | 28.71 | 25.12 | 21.53 | 17.94 |
17 | 4500 | 1.9:1 | 2368. | 38.13 | 34.32 | 30.50 | 26.69 | 22.88 | 19.06 |
18 | 4500 | 1.9:1 | 2368. | 40.37 | 36.33 | 32.30 | 28.26 | 24.22 | 20.19 |
|
12 | 4600 | 1.9:1 | 2421. | 27.51 | 24.76 | 22.01 | 19.26 | 16.51 | 13.76 |
13 | 4600 | 1.9:1 | 2421. | 29.80 | 26.82 | 23.84 | 20.86 | 17.88 | 14.90 |
14 | 4600 | 1.9:1 | 2421. | 32.10 | 28.89 | 25.68 | 22.47 | 19.26 | 16.05 |
15 | 4600 | 1.9:1 | 2421. | 34.39 | 30.95 | 27.51 | 24.07 | 20.63 | 17.19 |
16 | 4600 | 1.9:1 | 2421. | 36.68 | 33.01 | 29.35 | 25.68 | 22.01 | 18.34 |
17 | 4600 | 1.9:1 | 2421. | 38.98 | 35.08 | 31.18 | 27.28 | 23.39 | 19.49 |
18 | 4600 | 1.9:1 | 2421. | 41.27 | 37.14 | 33.01 | 28.89 | 24.76 | 20.63 |
|
12 | 4700 | 1.9:1 | 2474. | 28.11 | 25.30 | 22.49 | 19.68 | 16.87 | 14.06 |
13 | 4700 | 1.9:1 | 2474. | 30.45 | 27.41 | 24.36 | 21.32 | 18.27 | 15.23 |
14 | 4700 | 1.9:1 | 2474. | 32.80 | 29.52 | 26.24 | 22.96 | 19.68 | 16.40 |
15 | 4700 | 1.9:1 | 2474. | 35.14 | 31.62 | 28.11 | 24.60 | 21.08 | 17.57 |
16 | 4700 | 1.9:1 | 2474. | 37.48 | 33.73 | 29.98 | 26.24 | 22.49 | 18.74 |
17 | 4700 | 1.9:1 | 2474. | 39.82 | 35.84 | 31.86 | 27.88 | 23.89 | 19.91 |
18 | 4700 | 1.9:1 | 2474. | 42.17 | 37.95 | 33.73 | 29.52 | 25.30 | 21.08 |
|
12 | 4800 | 1.9:1 | 2526. | 28.71 | 25.84 | 22.97 | 20.10 | 17.22 | 14.35 |
13 | 4800 | 1.9:1 | 2526. | 31.10 | 27.99 | 24.88 | 21.77 | 18.66 | 15.55 |
14 | 4800 | 1.9:1 | 2526. | 33.49 | 30.14 | 26.79 | 23.44 | 20.10 | 16.75 |
15 | 4800 | 1.9:1 | 2526. | 35.89 | 32.30 | 28.71 | 25.12 | 21.53 | 17.94 |
16 | 4800 | 1.9:1 | 2526. | 38.28 | 34.45 | 30.62 | 26.79 | 22.97 | 19.14 |
17 | 4800 | 1.9:1 | 2526. | 40.67 | 36.60 | 32.54 | 28.47 | 24.40 | 20.33 |
18 | 4800 | 1.9:1 | 2526. | 43.06 | 38.76 | 34.45 | 30.14 | 25.84 | 21.53 |
|
12 | 4900 | 1.9:1 | 2579. | 29.31 | 26.38 | 23.44 | 20.51 | 17.58 | 14.65 |
13 | 4900 | 1.9:1 | 2579. | 31.75 | 28.57 | 25.40 | 22.22 | 19.05 | 15.87 |
14 | 4900 | 1.9:1 | 2579. | 34.19 | 30.77 | 27.35 | 23.93 | 20.51 | 17.10 |
15 | 4900 | 1.9:1 | 2579. | 36.63 | 32.97 | 29.31 | 25.64 | 21.98 | 18.32 |
16 | 4900 | 1.9:1 | 2579. | 39.07 | 35.17 | 31.26 | 27.35 | 23.44 | 19.54 |
17 | 4900 | 1.9:1 | 2579. | 41.52 | 37.37 | 33.21 | 29.06 | 24.91 | 20.76 |
18 | 4900 | 1.9:1 | 2579. | 43.96 | 39.56 | 35.17 | 30.77 | 26.38 | 21.98 |
|
12 | 5000 | 1.9:1 | 2632. | 29.90 | 26.91 | 23.92 | 20.93 | 17.94 | 14.95 |
13 | 5000 | 1.9:1 | 2632. | 32.40 | 29.16 | 25.92 | 22.68 | 19.44 | 16.20 |
14 | 5000 | 1.9:1 | 2632. | 34.89 | 31.40 | 27.91 | 24.42 | 20.93 | 17.44 |
15 | 5000 | 1.9:1 | 2632. | 37.38 | 33.64 | 29.90 | 26.17 | 22.43 | 18.69 |
16 | 5000 | 1.9:1 | 2632. | 39.87 | 35.89 | 31.90 | 27.91 | 23.92 | 19.94 |
17 | 5000 | 1.9:1 | 2632. | 42.36 | 38.13 | 33.89 | 29.66 | 25.42 | 21.18 |
18 | 5000 | 1.9:1 | 2632. | 44.86 | 40.37 | 35.89 | 31.40 | 26.91 | 22.43 |
|
Notes Theoretical Speed (MPH) = Propeller RPM X Pitch X 60
12 x 5280 The distance traveled is obtained by multiplying the propeller RPM by the propeller pitch (inches) and dividing by 12 (number of inches in a foot). To convert this to miles per hour, multiply by 60 (number of minutes in an hour) and divide by 5280 (number of feet in a mile). The propeller slippage factor is a purely theoretical value. Suggested values are : - Runabouts - 10% to 20%
- Cruisers - 30%
- Displacement hulls - 40%
- Houseboats - 50%
Factors not considered
Weight, hull type and horsepower are not considered in the calculation.
We welcome your comments and suggestions : paulkane@chelseacoachworks.com Fortran code written by Paul Kane, Chelsea, Quebec Building the Glen-L Hot Rod : www.boats.chelseacoachworks.com Last revised : 23-JUL-2007 |