Don Dunbar wrote:
This page has some of the information I was looking for in my early
email. It may be of interest to all.
Don Dunbar
http://www.stittind.com/Rotary240HP/Rotary_vs_Two_Cycle.htm
MINI 500 Gage RPM Power Torque Power Torque
Percent
PEP with PEP with
PEP PEP
Red 76.92% 5000 Performance Performance Stock Stock
Rotary Rotary Rotary Rotary
Valve Valve Valve Valve
Red 78.46% 5100
Red 80.00% 5200
Red 81.54% 5300
Red 83.08% 5400
Red 84.62% 5500
Red 86.15% 5600
Red 87.69% 5700
Red 89.23% 5800 5000
Yellow 90.77% 5900 5200 21.3 31.90 46.80 49.10
Yellow 92.31% 6000 5400 25.20 33.00 51.90 52.40
Yellow 93.85% 6100 5600 28.80 33.60 56.10 54.60
Yellow 95.38% 6200 5800 46.20 48.50 61.80 57.90
Green 96.92% 6300 6000 57.70 55.10 67.00 60.70
Green 98.46% 6400 6200 70.60 61.70 70.60 61.80
Green 100.00% 6500 6400 73.90 62.30 75.60 64.00
Green 101.54% 6600 6600 77.30 63.40 78.00 64.00
Green 103.08% 6700 6800 81.10 64.50 79.70 63.50
Green 104.62% 6800 7000 82.80 63.90 80.00 61.80
Yellow 106.15% 6900 7200 82.30 61.70 77.80 59.00
Yellow 107.69% 7000
Yellow 109.23% 7100
Yellow 110.77% 7200
Red 112.31% 7300 Not useable in our
Application
Red 113.85% 7400 Not useable in our
Application
Red 115.38% 7500 Not useable in our
Application
Test Run: 4
Testing Date: 8/8/97
Configuration: 504 Rotary Valve/Mini 500 exhaust manifold and
PEP tuned exhaust system...
[Image]
This next graph is for two rotor (13B with turbo rotor, not turbo charged engine).
13B Leading Pocket Rotor Turbo 38MM Venturis E production
Fuel
RPM HP LB-FT EGT 1 EGT 2 A/F lb/hp/hrOil Pres Oil Temp
6000 155.6 136.2 1511 1589 13.81 0.538 109.9 167
6100 159.3 137.1 1515 1597 13.75 0.530 109.9 167
6200 163.3 138.4 1519 1602 13.99 0.519 109.6 167
6300 166.2 138.5 1524 1612 13.93 0.517 109.6 167
6400 169.5 139.1 1528 1600 13.93 0.522 109.5 167
6500 172.1 139.0 1533 1621 13.89 0.504 109.3 168
6600 176.2 140.2 1539 1627 13.79 0.515 109.1 169
6700 179.4 140.6 1542 1632 13.84 0.515 108.9 169
6800 182.2 140.7 1546 1635 13.86 0.543 108.5 169
6900 185.2 140.9 1552 1642 13.75 0.546 108.3 169
7000 187.1 140.3 1557 1646 13.77 0.538 108.2 169
7100 188.8 139.6 1563 1651 13.76 0.549 108.1 169
7200 190.7 139.1 1564 1655 13.74 0.537 107.9 169
7300 194.1 139.6 1569 1658 13.75 0.548 107.8 169
7400 195.0 138.4 1573 1663 13.76 0.542 107.6 169
7500 196.6 137.7 1575 1666 13.74 0.537 107.5 170
7600 198.5 137.2 1577 1668 13.75 0.535 107.2 171
7700 199.3 135.9 1582 1674 13.63 0.544 107.0 171
7800 201.0 135.3 1586 1675 13.55 0.528 106.8 171
7900 201.7 134.1 1591 1681 13.56 0.538 106.6 170
8000 203.2 133.4 1595 1682 13.46 0.579 106.5 171
8100 204.2 132.4 1599 1687 13.56 0.589 106.3 171
8200 205.2 131.4 1604 1690 13.46 0.581 106.0 171
8300 205.7 130.1 1606 1692 13.35 0.586 105.8 171
8400 205.9 128.7 1612 1695 13.51 0.589 107.7 171
8500 206.0 127.3 1616 1697 13.37 0.600 105.4 172
8600 206.2 125.9 1619 1699 13.40 0.601 105.3 173
8700 205.6 124.1 1609 1701 13.56 0.603 105.2 173
8800 204.8 122.2 1624 1705 13.56 0.613 105.1 173
8900 205.1 121.0 1628 1706 13.58 0.634 104.9 173
9000 203.1 118.5 1630 1706 13.28 0.620 104.6 173
[Image]
20B means three rotor, 13B means two rotor.
20B vs 13B Turbo Charged Fuel
Injection
RPM 20B HP 20B 13B HP 13B
FT/LB FT/LB
3500 178.9 268.4 118.1 177.1
3600 192.0 280.1 126.7 184.9
3700 205.7 292.1 135.8 192.8
3800 219.9 304.0 145.1 200.6
3900 232.4 313.0 153.4 206.6
4000 244.1 320.6 161.1 211.6
4100 254.7 326.2 168.1 215.3
4200 265.5 332.1 175.2 219.2
4300 275.7 336.8 182.0 222.3
4400 284.3 339.3 187.6 223.9
4500 295.6 345.1 195.1 227.8
4600 304.3 347.5 200.8 229.4
4700 311.8 348.4 205.8 229.9
4800 318.5 348.5 210.2 230.0
4900 326.8 350.3 215.7 231.2
5000 332.9 349.7 219.7 230.8
5100 339.4 349.5 224.0 230.7
5200 344.6 348.1 227.4 229.7
5300 349.0 345.9 230.3 228.3
5400 353.7 344.0 233.4 227.0
5500 357.9 341.7 236.2 225.5
5600 363.1 340.5 239.6 224.7
5700 364.8 336.1 240.8 221.8
5800 362.6 328.3 239.3 216.7
5900 367.0 326.7 242.2 215.6
6000 371.8 325.4 245.4 214.8
6100 376.1 323.8 248.2 213.7
6200 375.7 318.3 248.0 210.1
6300 372.0 310.1 245.5 204.7
6400 373.2 306.3 246.3 202.2
6500 367.5 296.9 242.6 196.0
A helicopter in essence has a variable pitch prop. In that case low RPM
torque could have something to do with it. Particularly in
regard to cruise fuel consumption.
Paul Lamar
The AirCraft Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/ http://www.linux.org
