Jerry Hey wrote:
Would it be possible to combine the p port and turbo? Since it never
comes up, there must be some good reason for not doing it. Jerry
Only if you want over 400 HP per rotor.
Paul Lamar
Eric Ruttan wrote:
Paul;
I am thinking a PPort and turbo for my CozyMk IV, more for power at altitude
than for Max power, which might be another reason to consider a turbo PP.
(TPP?)
My question is concerning BSFC. I know we are in the good habit of fact
based analysis, but do you think there would be a noticeable BSFC difference
between a turbo PP or something comparable like a 20 B?
Given most of us are looking for about 200+HP, What setup would you guess we
would see the best BSFC? Would there be a real differance?
Eric
Probably an RX8 engine would show a small advantage.
I think People are getting too carried away with the BSFC. All you need
do is slow down a bit and your miles per gallon will get better fast.
Paul Lamar
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Engine HP = 100
BSFC Pounds Per Hour Gallons Per Hour
0.42 42.0 7.0
0.43 43.0 7.2
0.44 44.0 7.3
0.45 45.0 7.5
0.46 46.0 7.7
0.47 47.0 7.8
0.48 48.0 8.0
0.49 49.0 8.2
0.50 50.0 8.3
0.51 51.0 8.5
0.52 52.0 8.7
0.53 53.0 8.8
0.54 54.0 9.0
0.55 55.0 9.2
Engine HP = 110
BSFC Pounds Per Hour Gallons Per Hour
0.42 46.2 7.7
0.43 47.3 7.9
0.44 48.4 8.1
0.45 49.5 8.2
0.46 50.6 8.4
0.47 51.7 8.6
0.48 52.8 8.8
0.49 53.9 9.0
0.50 55.0 9.2
0.51 56.1 9.3
0.52 57.2 9.5
0.53 58.3 9.7
0.54 59.4 9.9
0.55 60.5 10.1
Engine HP = 120
BSFC Pounds Per Hour Gallons Per Hour
0.42 50.4 8.4
0.43 51.6 8.6
0.44 52.8 8.8
0.45 54.0 9.0
0.46 55.2 9.2
0.47 56.4 9.4
0.48 57.6 9.6
0.49 58.8 9.8
0.50 60.0 10.0
0.51 61.2 10.2
0.52 62.4 10.4
0.53 63.6 10.6
0.54 64.8 10.8
0.55 66.0 11.0
Engine HP = 130
BSFC Pounds Per Hour Gallons Per Hour
0.42 54.6 9.1
0.43 55.9 9.3
0.44 57.2 9.5
0.45 58.5 9.7
0.46 59.8 10.0
0.47 61.1 10.2
0.48 62.4 10.4
0.49 63.7 10.6
0.50 65.0 10.8
0.51 66.3 11.0
0.52 67.6 11.3
0.53 68.9 11.5
0.54 70.2 11.7
0.55 71.5 11.9
Engine HP = 140
BSFC Pounds Per Hour Gallons Per Hour
0.42 58.8 9.8
0.43 60.2 10.0
0.44 61.6 10.3
0.45 63.0 10.5
0.46 64.4 10.7
0.47 65.8 11.0
0.48 67.2 11.2
0.49 68.6 11.4
0.50 70.0 11.7
0.51 71.4 11.9
0.52 72.8 12.1
0.53 74.2 12.4
0.54 75.6 12.6
0.55 77.0 12.8
Engine HP = 150
BSFC Pounds Per Hour Gallons Per Hour
0.42 63.0 10.5
0.43 64.5 10.8
0.44 66.0 11.0
0.45 67.5 11.2
0.46 69.0 11.5
0.47 70.5 11.7
0.48 72.0 12.0
0.49 73.5 12.2
0.50 75.0 12.5
0.51 76.5 12.7
0.52 78.0 13.0
0.53 79.5 13.2
0.54 81.0 13.5
0.55 82.5 13.7
Engine HP = 160
BSFC Pounds Per Hour Gallons Per Hour
0.42 67.2 11.2
0.43 68.8 11.5
0.44 70.4 11.7
0.45 72.0 12.0
0.46 73.6 12.3
0.47 75.2 12.5
0.48 76.8 12.8
0.49 78.4 13.1
0.50 80.0 13.3
0.51 81.6 13.6
0.52 83.2 13.9
0.53 84.8 14.1
0.54 86.4 14.4
0.55 88.0 14.7
Engine HP = 170
BSFC Pounds Per Hour Gallons Per Hour
0.42 71.4 11.9
0.43 73.1 12.2
0.44 74.8 12.5
0.45 76.5 12.7
0.46 78.2 13.0
0.47 79.9 13.3
0.48 81.6 13.6
0.49 83.3 13.9
0.50 85.0 14.2
0.51 86.7 14.4
0.52 88.4 14.7
0.53 90.1 15.0
0.54 91.8 15.3
0.55 93.5 15.6
Engine HP = 180
BSFC Pounds Per Hour Gallons Per Hour
0.42 75.6 12.6
0.43 77.4 12.9
0.44 79.2 13.2
0.45 81.0 13.5
0.46 82.8 13.8
0.47 84.6 14.1
0.48 86.4 14.4
0.49 88.2 14.7
0.50 90.0 15.0
0.51 91.8 15.3
0.52 93.6 15.6
0.53 95.4 15.9
0.54 97.2 16.2
0.55 99.0 16.5
Engine HP = 190
BSFC Pounds Per Hour Gallons Per Hour
0.42 79.8 13.3
0.43 81.7 13.6
0.44 83.6 13.9
0.45 85.5 14.2
0.46 87.4 14.6
0.47 89.3 14.9
0.48 91.2 15.2
0.49 93.1 15.5
0.50 95.0 15.8
0.51 96.9 16.1
0.52 98.8 16.5
0.53 100.7 16.8
0.54 102.6 17.1
0.55 104.5 17.4
Engine HP = 200
BSFC Pounds Per Hour Gallons Per Hour
0.42 84.0 14.0
0.43 86.0 14.3
0.44 88.0 14.7
0.45 90.0 15.0
0.46 92.0 15.3
0.47 94.0 15.7
0.48 96.0 16.0
0.49 98.0 16.3
0.50 100.0 16.7
0.51 102.0 17.0
0.52 104.0 17.3
0.53 106.0 17.7
0.54 108.0 18.0
0.55 110.0 18.3
Flat Plat = 2.08 BSFC = 0.44
HP FPS MPH thrust drag pounds gal MPG
65.0 224.9 153.3 127.2 127.1 28.6 4.7 32.7
70.0 230.6 157.2 133.6 133.7 30.8 5.0 31.1
75.0 235.9 160.9 139.9 139.9 33.0 5.4 29.7
80.0 241.1 164.4 146.0 146.2 35.2 5.8 28.5
85.0 245.9 167.7 152.1 152.0 37.4 6.1 27.3
90.0 250.7 170.9 158.0 158.0 39.6 6.5 26.3
95.0 255.2 174.0 163.8 163.8 41.8 6.9 25.4
100.0 259.6 177.0 169.5 169.5 44.0 7.2 24.5
105.0 263.9 179.9 175.1 175.1 46.2 7.6 23.8
110.0 268.0 182.7 180.6 180.6 48.4 7.9 23.0
115.0 272.1 185.5 186.0 186.1 50.6 8.3 22.4
120.0 275.9 188.1 191.4 191.4 52.8 8.7 21.7
125.0 279.6 190.7 196.7 196.6 55.0 9.0 21.1
130.0 283.3 193.2 201.9 201.8 57.2 9.4 20.6
135.0 287.0 195.7 207.0 207.1 59.4 9.7 20.1
140.0 290.5 198.0 212.1 212.1 61.6 10.1 19.6
145.0 293.9 200.4 217.1 217.2 63.8 10.5 19.2
150.0 297.2 202.6 222.1 222.0 66.0 10.8 18.7
155.0 300.5 204.9 227.0 227.0 68.2 11.2 18.3
160.0 303.7 207.1 231.8 231.9 70.4 11.5 17.9
