SEN 2848

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Category: Archive 2021
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SEN 2848

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 1      80 180 157 517 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 0.15 180 180 180 180 180 180 180 180 178 1618 2
RANDY SECOR 0.19   180 180 180 180 180 180 180 157 1417 3
BRUCE HANNAH 0.15  180 180 180 180 180 99 999 4
JUM KRUSE 0.19     180 180 180 180 172 892 5
WALT GHIO 0.15     180 180 180 167 707 6
JERRY HULL 0.29    180 180 180 129 669 7
BUD ROMACK 0.19    166 159 180 505 8
PETE PFARR 0.29    163 180 134 477 9
PHILL RONNEY 0.19   98 155 180 433 10
GUY MENANNO 0.19   180 157 337 11
MIKE CALLAS 0.19   105 93 198 12
DON MCNEMEE 0.35   180 180 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 0.15     180 180 180 180 180 180 180 180 180 111 1731 1
BOB DESHIELDS 0.15 180 180 180 180 180 180 180 180 178 1618 2
RANDY SECOR 0.19   180 180 180 180 180 180 180 157 1417 3
BRUCE HANNAH 0.15  180 180 180 180 180 99 999 4
JUM KRUSE 0.19     1  80 180 180 180 172 892 5
WALT GHIO 0.15     180 180 180 167 707 6
BUD ROMACK 0.19    166 159 180 505 7
PHILL RONNEY 0.19   98 155 180 433 8
GUY MENANNO 0.19   180 157 337 9
MIKE CALLAS 0.19   105 93 198 10


B NOST

JERRY HULL 0.29 180 180 180 129 669 1
PETE PFARR 0.29 163 180 134 477 2


C NOST

DON MCNEMEE 0.35180 180 1