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  1. Timer for no BEC ESC
  2. Towed Power
  3. San Valeers Annual Results

Timer for no BEC ESC

From:Tapio Linkosalo

*Keep in mind that the drone ESC does not have a brake enabled for a
folder prop. And a special wiring harness is needed.
Actually, many (most) drone ESCs are based on Arm32 chip, and use BlHeli
firmware. the BlHeli version for Arm has an option to enable the
brake-on-stop. You need an interface (an Arduino chip with suitable
program), then connect the Arduino to a PC, and the ESC to the arduino.
After the connection it is a simple task to turn on the brake.

In my timer I connected the ESC signal connector to the input side of the
regulator on board the timer. Thus no special wiring is needed, but the ESC
is connected to the timer with a 3-wire lead, as with BEC ESC.s. Where in
the older version the plus wire provided regulated power to the timer and
servo, now the plus is connected to the battery plus in ESC and provides
unregulated voltage to the regulator on timer.

-Tapio-


Towed Power

From:Peter Martin

Hi,
In response to Gil Morris’ comment on towed aircraft for wind power generation, the British FF team had a discussion on this last year.   There’s a good paper by Prof Moritz Diehl on the fundamentals, at https://homes.esat.kuleuven.be/~highwind/wp-content/uploads/2013/08/Diehl2013a.pdf.
In terms of basic Physics, whether you transmit force to spin an electrical generator and lengthen the line, or that force is instead used to increase the altitude and speed of an aircraft on a fixed 50m line, they are both looking to extract the most power from the wind.   In the first case, the aim is to generate electrical energy.  In the second case, the aim is to increase aircraft kinetic and potential energy before towline release (after release, kinetic energy converts to more potential – Altitude – and also is lost to drag).
Main points are that equation 3 says most power can be generated when the towline is horizontal – It becomes harder to harvest power from the wind as the aircraft comes up on the line, note to F1A flyers!

Equation 8 says low drag gives high power.  Also, equations 8 & 9 say that there’s a limit on power that can be generated, based on lift, drag and relative windspeed.  Go too slow and you don’t get enough power, but go *too fast* and lose power to drag.   Glider flyers might need to experiment with the rhythm of launching to get the optimum speed in each phase of the launch pull, it might not just be about as hard and fast as possible the whole way – A bit like a golfer hitting the sweet spot.
Though might be of interest,

Peter Martin


San Valeers Annual Results

2021 SAN VALEERS ANNUAL
APRIL 10-11
EVENT         FLYER        1   2   3   4   5   6   7   8   9   10  11  12 TOTAPLACE
E-36   TARON MALKAHASYAN 120 120 120 120 120 120 120 120 120 120 120  85 1405 1
CLINT BROOKS    120 120 120 120 120 120 120 120 120 120 120     1320 2
GEORGE MORRIS   120 120 120 120 116                             596  3
DON BARTICK    120 106                                         226  4
JANA VAN NEST    51  24  58                                     133  5

P-30    ART CHMIELEWSKY  120 120 120 150 180 210 240 128                 1268 1
MARK SEXTON    120 120 120 150 180 119                         809  2
GLEN GRELL    120 120 120 130                                 490  3
DON BARTCIK    120 120 120 100                                 460  4
MIKE MAYA     120 109 120                                     349  5
CLINT BROOKS    85                                              85  6

CAT GLIDER  ROCCO FERRASIO   91  81  61 120 120 120 120 120 116             716  1
JIM LUKIN     120 120  86 120 120 120  63                     663  2
TIM BATIUK    120 120 120 120 105                             345  3
GEORGE MORRIS    32  49  43  56  43  44                         149  4
BRIAN VAN NEST   44  14  20  29  31  35                         110  5
CARL PARSONS    35  37  32  28  21  38                         110  6
FRED TERZSAN    16  23  21  28  41                              92  7
1 ST JUNIO  KELLEN KELLER    14  12  4   11  11  16                          42  8

HL GLIDER     TIM BATIUK     22 120 120 120 120 120                         600  1
TARON MALKAHASYAN 120  84 120  92 120 118                         478  2
ROBERT DESHIELDS 120 120 120  38                                 398  3
GUY MENANNO    120  92  39 120 120  38                         398  4
SARA MENANNO    33  92  53  75 100  86                         278  5

1/2 A GAS    DON BARTICK    180 180 180 180 111                             831  1
FORREST MENANNO  180 180 180 180  96                             816  2
GEORGE MORRIS   165 180  86                                     431  3

EVENT         FLYER        1   2   3   4   5   6   7   8   9   10  11  12 TOTAPLACE
A GAS   TERRY THORKILDSEN 180 180 180 180 180 180 180 180 180             1620 1
ROBERT DESHIELDS 180 180 180 180 180 180 180 180 111             1551 2
JERRY HULL    180 180 180 180 103                             823  3
GEORGE MORRIS   180 180 180 110                                 650  4
GLEN SCHNEIDER  180 180 179                                     539  5
GUY MENANNO    180 180 157                                     517  6
1 ST JUNIO  KELLIN KELLER   180 180 120                                     480  7
SARA MENANNO   180 151 140                                     471  8
JEFF CARMAN    105 180 180                                     465  9
BOB DESHIELDS   180 180                                         360  10
MIKE THOMPSON   180 161                                         341  11

B GAS      GUY MENANNO    180 180 180 180 180 147                         1047 1
GEORGE MORRIS   180 180 180 180 180  94                         994  2
JEFF CARMAN    180 180 180 180 180  3                          903  3
TERRY THORKILDSEN 180 180 140                                     500  4
FORREST MENANNO   95 180 180                                     455  5
JAMES KRUSE    156  84 180                                     420  6
BOB SCULLY    180 180                                         360  7
C GAS      RANDY SECORE   180 180 180 180 180 180 180 149                 1409 1
JEFF CARMAN    180 180 180 180 180 180 165                     1245 2
ROBERT DESHIELDS 180 180 180 180 180  85                         985  3
JERRY HULL    180 180 180 180  86                             806  4
GUY MENANNO    180 180 180 141                                 681  5
BOB DESHIELDS   180 160 180                                     520  6
GEORGE MORRIS   180 180 114                                     474  7
D GAS      GUY MENANNO    180 180 180                                     540  1
JEFF CARMAN    180 180 142                                     502  2
AL HEINRICK    180  90  83                                     353  3

EVENT         FLYER        1   2   3   4   5   6   7   8   9   10  11  12 TOTAPLACE
F1A      NOA GOLDSTEIN   240 180 180 180 180 180 180                     1320 1
ENES PECENKOVIC  227 180 180 180 180 180 180                     1307 2
GUY GOLDSTEIN   240 180 180 180 180 180 160                     1300 3
JIM PARKER    240 180 152 180 180 180 180                     1292 4
PETER ALLNUT   177 180 180 180 180 180 180                     1257 5
BRIAN VAN NEST  157 180 180 173 180 180 180                     1230 6
MIKE McKEEVER   225 180 180 155 180 180 126                     1226 7
ANAT GOLDSTEIN  213 180 180 180 180  75 180                     1188 8
RESTO PUHAKKA    63 100 180 180 180  16 180                     899  9
PETER BROCKS   214 135  79  0  180 180  78                     866  10
PIERE BRUN     97 180  70 180 180  0   0                      707  11
SHLOMI ROSENZWEIG 194                                             194  12
F1B       JERRY FITCH    240 180 180 180 180 180 180 360                 1680 1
SKYLAR DONNELY  240 180 180 180 180 180 180 223                 1543 2
BLAKE JENSEN   240 180 180 180 180 178 180                     1318 3
SEVAK MALKHASYAN 240 180 180 180 180 160 180                     1300 4
MILE DAVIS    240 180 180 180 180 150 180                     1290 5
TIFFANY ODELL   240 180 180 180 180 141 180                     1281 6
ITTAI KOHAVI   240 180 165 148 180 180 180                     1273 7
BOB PERERCHIO   191 180 180 180 180 180 180                     1271 8
WALT GJIO     203 180 180 162 180 180 180                     1265 9
BILL BOOTH    240 180 180 180 180 118 180                     1258 10
LARRY NORVAL   240 180 180 108 180 180 180                     1248 11
MARTY SCHOEDER  240 180 160 160                                 740  12
F1C      RON McBURNETT   240 180 154 180 180 180 180                     1294 1
F1J      GLEN SCHNEIDER  120  23 120 120 120                             503  1
DON BARTICK    115  98  42 105 107                             467  2
F1G       TIFFNY ODELL   120 120 120 120 120 180                         780  1
MIKE DAVIS    120 120 120 120 120 131                         731  2
JERRY FITCH    120 120 120 120 120 126                         726  3
PETER BROCKS   120  96 120 117 120                             573  4
F1P      HENERY FEISTER  168 180 135 180 156  0                          819  1
F1H       BLAKE JENSEN   120 120 120 120 120 226                         826  1
JIM PARKER    120 120 120  97 120 223                         800  2
F1Q       BEN TARCHER    180 180 121 180 180 116  57                     1014 1
F1S       CLINT BROOKS   120 120 120 120 120 180 240                     1020 1
LARRY NORVAL   120 120 120 120 120 180 207                     987  2
SEVAK MALKHASYAN 120 120 120 120 120  76                         676  3
TARON MALKHASYAN 120 120 120 120 120  14                         614  4
JANA VAN NEST   120  99 120 120 120                             579  5
TERRY KERGER   120 120 120 120  93                             573  6
BEN THARCHER   120  92  12 120  84                             428  7

EVENT         FLYER        1   2   3   4   5   6   7   8   9   10  11  12 TOTAPLACE
NOS RUBBER  BRIAN VAN NEST  180 180  0                                      360  1
1/2A NOST     JIM KELLEY    180 180 180 109                                 649  1
JERRY ROCHA    180 173 180                                     533  2
FORREST MENANNO  180 172 180                                     532  3
BOB DESHIELDS   138 180 180                                     498  4
ROBERT DESHIELDS 180 143 174                                     497  5
DON MCNEMEE    149 180 125                                     454  6
GLEN SCHNEIDER  136 180  64                                     380  7
BUCK MUPRY     81 180  9                                      270  8
MIKE THOMPSON   152  90                                         242  9

ABC NOST     JIM KELLY     0.15180 180 180 180 180 180 180 180 180 111     1731 1
BOB DESHIELDS   0.15180 180 180 180 180 180 180 180 178         1618 2
RANDY SECOR    0.19180 180 180 180 180 180 180 157             1417 3
BRUCE HANNAH   0.15180 180 180 180 180  99                     999  4
JUM KRUSE     0.19180 180 180 180 172                         892  5
WALT GHIO     0.15180 180 180 167                             707  6
JERRY HULL    0.29180 180 180 129                             669  7
BUD ROMACK    0.19166 159 180                                 505  8
PETE PFARR    0.29163 180 134                                 477  9
PHILL RONNEY   0.19 98 155 180                                 433  10
GUY MENANNO    0.19180 157                                     337  11
MIKE CALLAS    0.19105  93                                     198  12
DON MCNEMEE    0.35180                                         180  13

CLASSIC TO    TIM BATUIK    180 180 180                                     540  1
VINTAGE FA   BRUCE HANNAH   180 180 180 180 180 360                         1260 1
GLEN SCHNEIDER  180 180 180 180 180 278                         1178 2
RANDY SECOR    180 180 180 180 168                             888  3
JIM KELLY     180 140 180 180 180                             860  4
ED DECKER     180 180 127 180 180                             847  5
GUY MENANNO    116                                             116  6

VINTAGE WA    BUD ROMAK     180 180 180 180 180 240                         1140 1
BRUCE HANAH    180 180 180 180 180 223                         1123 2
DARYL PERKINS   145 180 135 180 180                             820  3
MARK SEXTON    113 180 180 180 110                             763  4
GLEN GRELL    132  0  124 121 180                             557  5
GUY MENANNO    180 180 172                                     532  6

1/2A GOLDE    PETE PFARR    180 180 180                                     540  1
BILL KELLY    180 170 180                                     530  2
GEORGE MORRIS   180 180 170                                     530  3
MIKE CALLAS    135 180 180                                     495  4
BOB DESHIELDS   180 180 106                                     466  5
MIKE THOMPSON   180  83 135                                     398  6
PHILL RONNEY   102 180 110                                     392  7

A NOST      JIM KELLY     0.15180 180 180 180 180 180 180 180 180 111     1731 1
BOB DESHIELDS   0.15180 180 180 180 180 180 180 180 178         1618 2
RANDY SECOR    0.19180 180 180 180 180 180 180 157             1417 3
BRUCE HANNAH   0.15180 180 180 180 180  99                     999  4
JUM KRUSE     0.19180 180 180 180 172                         892  5
WALT GHIO     0.15180 180 180 167                             707  6
BUD ROMACK    0.19166 159 180                                 505  7
PHILL RONNEY   0.19 98 155 180                                 433  8
GUY MENANNO    0.19180 157                                     337  9
MIKE CALLAS    0.19105  93                                     198  10
B NOST      JERRY HULL    0.29180 180 180 129                             669  1
PETE PFARR    0.29163 180 134                                 477  2
C NOST     DON MCNEMEE    0.35180                                         180  1