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DataSheet

 HYPERION
Emeter
Prop Constants for Efficiency Determination

DataSheets:
See Hyperion Emeter here
See Titan Brushless ESC here
See all Hyperion products here

  
See "PropTalk": An introduction to props, power constants, and power factors - and how they allow us to easily determine the efficiency of a power system using the Hyperion Emeter.
Hyperion continues to test propellers for prop constants and power factor.  There are many propellers to do, and all tests must be repeated several times to insure accurate data.  Next on the list are the APC SF series, then GWS SF and HD types. We welcome your suggestions for propellers to test, but please note that we will not be able to supply data on demand, nor tell you when a particular prop or series will be listed.  When we have more constants to publish, you will see them here.  We especially welcome modelers from all over the world to send in test data of your own which we may publish, with your permission.

Aeronaut CAM Series Folders with 52, 47, 42mm centre hubs
POWER FACTOR = 3.08
  PROP CONSTANTS  
Prop Size

Aeronaut

 W. Geck Dyno Average
  52mm 47mm 42mm 42mm 42mm 42mm
AE  8*5 0.106 0.090 0.079     0.079
AE  9*5 0.158 0.138 0.123 0.111   0.117
AE  9.5*5 0.200 0.178 0.159 0.132 0.145 0.145
AE 10*6 0.217 0.194 0.175 0.171 0.191 0.179
AE 10*8 0.381 0.340 0.299     0.299
AE 11*7 0.409 0.361 0.329 0.311   0.320
AE 11*8 0.451 0.409 0.372 0.367   0.369
AE 12*6.5 0.480 0.438 0.401 0.362   0.382
AE 12*8 0.703 0.642 0.588 0.515   0.551
AE 12*9 0.818 0.744 0.682 0.596   0.639
AE 12.5*7.5 0.744 0.678 0.623 0.625 0.691 0.646
AE 13*8 0.758 0.699 0.642     0.642
AE 13*11 1.230 1.135 1.043 0.901 1.111 1.018
AE 14* 8 1.465 1.346 1.249 1.024   1.136
AE 14* 9 1.706 1.573 1.454 1.271 1.317 1.347
AE 14*10 2.002 1.839 1.706 1.555 1.855 1.705
AE 15* 8 1.400 1.327 1.258     1.258
AE 15*10 1.978 1.876 1.778   1.768 1.773
AE 15*13 2.919 2.702 2.529 2.467   2.498
AE 16* 8 1.682 1.599 1.512     1.512
AE 16*10 2.415 2.266 2.110 2.289 2.291 2.230
AE 16*13 3.191 2.977 2.781 2.715   2.748
AE 17* 9 2.626 2.460 2.307    2.261 2.284
AE 17*11 3.847 3.610 3.311 3.253 4.081 3.548
AE 17*13 5.664 5.271 4.944 4.061. 4.205 4.575
AE 18*11 3.535 3.330 2.988 2.845   2.917
AE 18.5*12 4.774 4.582 4.385     4.385

Aeronaut Classic Series Folders with 52, 47, 42mm centre hubs
POWER FACTOR = 3.08
  PROP CONSTANTS  
Prop Size Ex Aeronaut Website W. Geck Dyno Average
  52mm 47mm 42mm 42mm 42mm 42mm
AE 7*6 0.065 0.054 0.046 0.07   0.058
AE 8*5 0.111 0.094 0.083     0.083
AE 9*5 0.097 0.085 0.076     0.093
AE 9*6.5 0.259 0.227 0.202     0.202
AE 9.5*5 0.167 0.148 0.132     0.132
AE 10*7 0.363 0.324 0.292     0.292
AE 10.5*6 0.357 0.323 0.292     0.292
AE 11*6.5 0.441 0.389 0.354   0.34 0.347
AE 11.5*7 0.511 0.465 0.422     0.422
AE 12*7 0.469 0.427 0.391     0.391
AE 12.5*6.5 0.574 0.524 0.483     0.483
AE 12.5*10 0.624 0.569 0.524   0.53 0.527
AE 13*6.5 0.658 0.602 0.555     0.555
AE 13.5*7 0.880 0.813 0.749     0.749
AE 14*7 1.065 0.980 0.909   0.86 0.885
AE 15*9.5 1.442 1.336 1.249   ? 1.249
AE 16.5*15 3.888 3.610 3.392   3.424 3.408
AE 18*8 2.167 2.037 1.935     1.935
Aeronaut Fixed Electric Props*  POWER FACTOR 3.0
Prop Size PROP CONSTANTS
   
6x5  0.033
6.5x4  0.031
7x7  0.085
8.5x5  0.085
8.5x6  0.120
8.5x7  0.166
9.5x5  0.184
9.5x6  0.195
9.5x7  0.248
10x6  0.239
10x7  0.303
10x8  0.426
10.5x6  0.321
10.5x7  0.340
10.5x8  0.381
*constants from Aeronaut data
Graupner CAM Folders* POWER FACTOR 3.08
Prop Size PROP CONSTANTS
   
     8x6 0.071
     9x6 0.149
    10x6 0.248
    11x6  
    12x6 0.388
    13x7 0.784
    14x9.5 1.089
*constants from Mr. W. Geck
Graupner Speed Props*  POWER FACTOR 3.08
Prop Size PROP CONSTANTS
   
   7x7 0.0731
   6.5x6.5 0.0541
   6x5.5 0.0330
   6x6 0.0376
   5.5x5.5 0.0286
   5x5 0.0243
   4.75x4.75 0.0182
*constants from Mr. P. Connolly for Hyperion
APC Electric "E" Series 
Prop Size PROP CONSTANTS POWER FACTOR
6x4 0.015 3.20
6x5.5    
7x5 0.042 3.20
8x4 0.060 3.20
8x6 0.106 3.20
8x8 0.148 3.20
9x4.5 0.090 3.20
9x6 0.129 3.20
9x7.5 0.352 2.90
9x9 0.448 2.90
10x5 0.144 3.20
10x7 0.223 3.20
10x10 0.680 2.90
11x5.5 0.222 3.20
11x7 0.301 3.20
11x8 0.357 3.20
11x8.5 0.383 3.20
11x10 0.589 3.20
12x6 0.322 3.20
12x8    
12x10 0.706 3.20
12x12 1.528 2.90
13x4 0.299 3.20
13x6.5 0.516 3.20
13x8 0.590 3.20
13x10 0.825 3.20
14x7 0.715 3.20
14x10 1.118 3.20
*constants and pf from Mr. P. Connolly for Hyperion
APC SLOWFLY Series 
Prop Size PROP CONSTANTS POWER FACTOR
7*4 0.028 3.30
7*5 0.028 3.40
7*6 0.039 3.40
8*3.8 0.045 3.40
8*6 0.087 3.40
9*3.8 0.048 3.55
9*4.7 0.146 3.00
9*6 0.119 3.55
9*7.5 0.204 3.40
10*3.8 0.136 3.40
10*4.7 0.187 3.30
10*7 0.337 3.30
11*3.8 0.183 3.40
11*4.7 0.283 3.30
11*7 0.398 3.40
12*3.8 0.230 3.60
12*6 0.629 3.30
*constants and pf from Mr. P. Connolly for Hyperion
APC Electric Sport Series*  POWER FACTOR 3.00
Prop Size PROP CONSTANTS* CONSTANTS DYNO*
7x4 0.039  
7x5 0.048  
7x6 0.072  
7x8 0.111  
8x5 0.095  
8x8 0.169  
9x5 0.132 0.129
9x6 0.174  
10x5 0.239  
10x6 0.268  
10x7 0.311  
10x8 0.373  
10x9 0.477  
11x10 0.669  
11x11 0.894  
11x5 0.309  
11x6 0.384  
11x7 0.413  
11x8 0.541 0.514
11x9 0.619  
12x10 0.974  
12x6 0.561  
12x7 0.584  
12x8 0.671  
12x9 0.779  
13x6 0.668  
13x7 0.779  
13x8 0.859  
*constants are from Mr. W. Geck, except "Constants Dyno" from Mr. P. Connolly for Hyperion.