SEN 2848
- Timer for no BEC ESC
- Towed Power
- 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