Doug Goncz
Jul23-04, 07:14 AM
<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no,location=no,scrollbars=yes,resizable=yes,status=no,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>Hello, fellow physics enthusiasts!\n\nI have been presenting my mobile electrical generator at PHY 298 under Dr.\nMajewski\'s guidance yearly for two years now. Class size is about seven\nstudents. I expect to speak again this fall.\n\nThe base vehicle is a Lightning Cycle Dynamics Thunderbolt recumbent with 110\nVAC and 30 VDC motor/generators, and ultracapacitor energy storage of 9 W-Hr at\n0.006 milliohm. That\'s 625 A max output. I\'ve generated 50 W on a hill and can\ngenerate hundreds. It converts Gatorade and muffin bars into 12VDC and 110\nVAC, and provides transportation and excercise. It fits on the bus and in the\nlift at the rail station. I can go essentially anywhere in the Metro DC area\nwith it, at minimal cost and use of gasoline, or zero use of gas if I tough out\n24 miles when I choose to.\n\nEfficiency is paramount.\n\nBoth generators are chain driven with bicycle chain using 8 tooth pinions and\n32 - 62 tooth chain ring driving sprockets to vary ratio. This is rather a\nsmall pinion for bicycle chain but I don\'t feel any fatigue or frustration\ndriving the AC generator with the cranks while on my exercise rides. A visitor,\nJoan, turned the cranks and remarked that the drive felt "free and easy". The\nexternal, that is external to the rotor, location of the ceiling fan\nmotor/generator wiring makes it low resistance. There\'s more room for fatter\nwires. The headlight load is an LED board made by Dialight. At 80 VAC and\nlower, it goes offline automatically to prevent depoling the rotor. A phase\nshift capacitor induces current in the rotor but to self start it must remain\npoled. It is poled with DC for about a second, once, and stays poled forever.\n\nI have used the DC generator on a Peugot mountain bike powered by the rear\nwheel, and by the cranks. Once, I drove uphill through the park powering a PAR\nstyle incandescent lamp, a Bicycle Lighting System headlamp, by generated DC\nonly, at night, navigating a short section of diffcult single track, and a long\nsection of wider trail. Another time, I kept two 15 W compact fluorescent tubes\nlit through an inverter for ten minutes, maintaining a constant voltage on the\nultracapacitors by varying my road speed along Fairfax County\'s Cross-County\ntrail. Another time, I kept a single 9 W compact fluorescent lit at night and\nnavigated some poorly lit sidewalk with this setup. Both these rides used 10-15\nVDC on the capattery and an inverter to power the fluorescent.\n\nI now have a six inch F4T5 fluorescent lamp powered by 4 AA alkaline batteries\nand can recharge a set of batteries while I ride. This light is mounted at the\nhandlbars, horizontally, and provides legal marker light function as well as\nnight trail illumination for single track trail, when a standard headlight is\ntoo closely focused. One must interpret the whole scene when navigating single\ntrack. A Nite Rider headlight mount has been installed but the 6VDC regulator\nfor it is not on line yet.\n\nTo make use of modularity, I\'d like very much to install a second instance of\nthis lamp at the tail light position, but existing red F4T5 tubes are red\npainted white phosphor and I don\'t think I\'ll have the efficiency I want to\nshow in my talks to the students by using this, although I have glass cleaner,\netchant, and paint ready to go on the lathe. Green and blue F4T5 tubes are\nphosphor type. Red phoshor is mised with green and blue in the white tube that\ncomes included with the lamp.\n\nI propose to paint an F4T5 germicidal (quartz tube, hard UV) lamp with red\nphosphor _externally_ by spraying on the lathe.\n\nI find I must solve an integral to compute the coating thickness.\n\nI know the exponential decay curve equation and have fit parameters to it at 20\n% / mil coating thickness. These can be changed. However, I need to figure the\nlight _emitted_ as a function of coating thickness. You see, the thicker the\ncoating, the more UV absorbed, but above critical thickness, the less light\neventually emitted, as the coating is opaque to internally generated red light\nas well as to UV. Opaque, that is, with some mils of thickness to 95%\nabsorption.\n\n1) Is this a useless pursuit? Is the band gap between germicidal emission and\nphosphor emission so large the thing will just heat up? Or is there some hope\nhere?\n\n2) Should I consider a HV interface to power the tube on the lathe, then just\npaint happily until I observe a uniform red output, sensing at some point that\nmore paint will just coat over the emitting paint, that is, I will sense the\ncoating thickness for peak emission intuitively or with a light meter? On my\nsmall lathe, the spindles are electrically insulated as the end plates of the\ndual headstocks are plastic.\n\n3) If a paint can be mixed, and a known coating thickness measured, and an\naccurate absorption coefficient pair established, how do I do the integral for\nlight emitted? I remind you I can compute the UV absorbed.\n\nI just plain don\'t _get_ the double effect of light generated at a certain\ndepth in the coating, then absorbed as it is direct outwards toward the viewer,\nby the coating lying over the "dr" layer which is generating the light.\n\nI repeat, existing tubes are blue or green phoshor to produce colored light,\nbut red tubes use a white phosphor and a red lacquer filter. The white phosphor\nis a mix of red, green, and blue phosphors.\n\n4) Why do they do it? Because of 1)? Or is there an economic reason?\n\n\nYours,\n\nDoug Goncz ( ftp://users.aol.com/DGoncz/ )\nStudent member SAE for one year.\nLoves in my life:\nDona, Jeff, Kim, Mom, Neelix, Tasha, and Teri, alphabetically.\nSo that is who I spend my time with.\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form"> View this Usenet post in original ASCII form </a></div><P></jabberwocky>Hello, fellow physics enthusiasts!
I have been presenting my mobile electrical generator at PHY 298 under Dr.
Majewski's guidance yearly for two years now. Class size is about seven
students. I expect to speak again this fall.
The base vehicle is a Lightning Cycle Dynamics Thunderbolt recumbent with 110
VAC and 30 VDC motor/generators, and ultracapacitor energy storage of 9 W-Hr at
.006 milliohm. That's 625 A max output. I've generated 50 W on a hill and can
generate hundreds. It converts Gatorade and muffin bars into 12VDC and 110
VAC, and provides transportation and excercise. It fits on the bus and in the
lift at the rail station. I can go essentially anywhere in the Metro DC area
with it, at minimal cost and use of gasoline, or zero use of gas if I tough out
24 miles when I choose to.
Efficiency is paramount.
Both generators are chain driven with bicycle chain using 8 tooth pinions and
32 - 62 tooth chain ring driving sprockets to vary ratio. This is rather a
small pinion for bicycle chain but I don't feel any fatigue or frustration
driving the AC generator with the cranks while on my exercise rides. A visitor,
Joan, turned the cranks and remarked that the drive felt "free and easy". The
external, that is external to the rotor, location of the ceiling fan
motor/generator wiring makes it low resistance. There's more room for fatter
wires. The headlight load is an LED board made by Dialight. At 80 VAC and
lower, it goes offline automatically to prevent depoling the rotor. A phase
shift capacitor induces current in the rotor but to self start it must remain
poled. It is poled with DC for about a second, once, and stays poled forever.
I have used the DC generator on a Peugot mountain bike powered by the rear
wheel, and by the cranks. Once, I drove uphill through the park powering a PAR
style incandescent lamp, a Bicycle Lighting System headlamp, by generated DC
only, at night, navigating a short section of diffcult single track, and a long
section of wider trail. Another time, I kept two 15 W compact fluorescent tubes
lit through an inverter for ten minutes, maintaining a constant voltage on the
ultracapacitors by varying my road speed along Fairfax County's Cross-County
trail. Another time, I kept a single 9 W compact fluorescent lit at night and
navigated some poorly lit sidewalk with this setup. Both these rides used 10-15
VDC on the capattery and an inverter to power the fluorescent.
I now have a six inch F4T5 fluorescent lamp powered by 4 AA alkaline batteries
and can recharge a set of batteries while I ride. This light is mounted at the
handlbars, horizontally, and provides legal marker light function as well as
night trail illumination for single track trail, when a standard headlight is
too closely focused. One must interpret the whole scene when navigating single
track. A Nite Rider headlight mount has been installed but the 6VDC regulator
for it is not on line yet.
To make use of modularity, I'd like very much to install a second instance of
this lamp at the tail light position, but existing red F4T5 tubes are red
painted white phosphor and I don't think I'll have the efficiency I want to
show in my talks to the students by using this, although I have glass cleaner,
etchant, and paint ready to go on the lathe. Green and blue F4T5 tubes are
phosphor type. Red phoshor is mised with green and blue in the white tube that
comes included with the lamp.
I propose to paint an F4T5 germicidal (quartz tube, hard UV) lamp with red
phosphor _externally_ by spraying on the lathe.
I find I must solve an integral to compute the coating thickness.
I know the exponential decay curve equation and have fit parameters to it at 20
% / mil coating thickness. These can be changed. However, I need to figure the
light _emitted_ as a function of coating thickness. You see, the thicker the
coating, the more UV absorbed, but above critical thickness, the less light
eventually emitted, as the coating is opaque to internally generated red light
as well as to UV. Opaque, that is, with some mils of thickness to 95%
absorption.
1) Is this a useless pursuit? Is the band gap between germicidal emission and
phosphor emission so large the thing will just heat up? Or is there some hope
here?
2) Should I consider a HV interface to power the tube on the lathe, then just
paint happily until I observe a uniform red output, sensing at some point that
more paint will just coat over the emitting paint, that is, I will sense the
coating thickness for peak emission intuitively or with a light meter? On my
small lathe, the spindles are electrically insulated as the end plates of the
dual headstocks are plastic.
3) If a paint can be mixed, and a known coating thickness measured, and an
accurate absorption coefficient pair established, how do I do the integral for
light emitted? I remind you I can compute the UV absorbed.
I just plain don't _get_ the double effect of light generated at a certain
depth in the coating, then absorbed as it is direct outwards toward the viewer,
by the coating lying over the "dr" layer which is generating the light.
I repeat, existing tubes are blue or green phoshor to produce colored light,
but red tubes use a white phosphor and a red lacquer filter. The white phosphor
is a mix of red, green, and blue phosphors.
4) Why do they do it? Because of 1)? Or is there an economic reason?
Yours,
Doug Goncz ( ftp://users.aol.com/DGoncz/ )
Student member SAE for one year.
Loves in my life:
Dona, Jeff, Kim, Mom, Neelix, Tasha, and Teri, alphabetically.
So that is who I spend my time with.
I have been presenting my mobile electrical generator at PHY 298 under Dr.
Majewski's guidance yearly for two years now. Class size is about seven
students. I expect to speak again this fall.
The base vehicle is a Lightning Cycle Dynamics Thunderbolt recumbent with 110
VAC and 30 VDC motor/generators, and ultracapacitor energy storage of 9 W-Hr at
.006 milliohm. That's 625 A max output. I've generated 50 W on a hill and can
generate hundreds. It converts Gatorade and muffin bars into 12VDC and 110
VAC, and provides transportation and excercise. It fits on the bus and in the
lift at the rail station. I can go essentially anywhere in the Metro DC area
with it, at minimal cost and use of gasoline, or zero use of gas if I tough out
24 miles when I choose to.
Efficiency is paramount.
Both generators are chain driven with bicycle chain using 8 tooth pinions and
32 - 62 tooth chain ring driving sprockets to vary ratio. This is rather a
small pinion for bicycle chain but I don't feel any fatigue or frustration
driving the AC generator with the cranks while on my exercise rides. A visitor,
Joan, turned the cranks and remarked that the drive felt "free and easy". The
external, that is external to the rotor, location of the ceiling fan
motor/generator wiring makes it low resistance. There's more room for fatter
wires. The headlight load is an LED board made by Dialight. At 80 VAC and
lower, it goes offline automatically to prevent depoling the rotor. A phase
shift capacitor induces current in the rotor but to self start it must remain
poled. It is poled with DC for about a second, once, and stays poled forever.
I have used the DC generator on a Peugot mountain bike powered by the rear
wheel, and by the cranks. Once, I drove uphill through the park powering a PAR
style incandescent lamp, a Bicycle Lighting System headlamp, by generated DC
only, at night, navigating a short section of diffcult single track, and a long
section of wider trail. Another time, I kept two 15 W compact fluorescent tubes
lit through an inverter for ten minutes, maintaining a constant voltage on the
ultracapacitors by varying my road speed along Fairfax County's Cross-County
trail. Another time, I kept a single 9 W compact fluorescent lit at night and
navigated some poorly lit sidewalk with this setup. Both these rides used 10-15
VDC on the capattery and an inverter to power the fluorescent.
I now have a six inch F4T5 fluorescent lamp powered by 4 AA alkaline batteries
and can recharge a set of batteries while I ride. This light is mounted at the
handlbars, horizontally, and provides legal marker light function as well as
night trail illumination for single track trail, when a standard headlight is
too closely focused. One must interpret the whole scene when navigating single
track. A Nite Rider headlight mount has been installed but the 6VDC regulator
for it is not on line yet.
To make use of modularity, I'd like very much to install a second instance of
this lamp at the tail light position, but existing red F4T5 tubes are red
painted white phosphor and I don't think I'll have the efficiency I want to
show in my talks to the students by using this, although I have glass cleaner,
etchant, and paint ready to go on the lathe. Green and blue F4T5 tubes are
phosphor type. Red phoshor is mised with green and blue in the white tube that
comes included with the lamp.
I propose to paint an F4T5 germicidal (quartz tube, hard UV) lamp with red
phosphor _externally_ by spraying on the lathe.
I find I must solve an integral to compute the coating thickness.
I know the exponential decay curve equation and have fit parameters to it at 20
% / mil coating thickness. These can be changed. However, I need to figure the
light _emitted_ as a function of coating thickness. You see, the thicker the
coating, the more UV absorbed, but above critical thickness, the less light
eventually emitted, as the coating is opaque to internally generated red light
as well as to UV. Opaque, that is, with some mils of thickness to 95%
absorption.
1) Is this a useless pursuit? Is the band gap between germicidal emission and
phosphor emission so large the thing will just heat up? Or is there some hope
here?
2) Should I consider a HV interface to power the tube on the lathe, then just
paint happily until I observe a uniform red output, sensing at some point that
more paint will just coat over the emitting paint, that is, I will sense the
coating thickness for peak emission intuitively or with a light meter? On my
small lathe, the spindles are electrically insulated as the end plates of the
dual headstocks are plastic.
3) If a paint can be mixed, and a known coating thickness measured, and an
accurate absorption coefficient pair established, how do I do the integral for
light emitted? I remind you I can compute the UV absorbed.
I just plain don't _get_ the double effect of light generated at a certain
depth in the coating, then absorbed as it is direct outwards toward the viewer,
by the coating lying over the "dr" layer which is generating the light.
I repeat, existing tubes are blue or green phoshor to produce colored light,
but red tubes use a white phosphor and a red lacquer filter. The white phosphor
is a mix of red, green, and blue phosphors.
4) Why do they do it? Because of 1)? Or is there an economic reason?
Yours,
Doug Goncz ( ftp://users.aol.com/DGoncz/ )
Student member SAE for one year.
Loves in my life:
Dona, Jeff, Kim, Mom, Neelix, Tasha, and Teri, alphabetically.
So that is who I spend my time with.