Posted by bealiba on February 13, 2008, 6:37 pm
> beal...@gmail.com wrote
> >> beal...@gmail.com wrote
> >> m:
> >> >> beal...@gmail.com wrote
> >> >> .co m:
> >> >> >> Got the thing running this weekend
> >> >> >>http://www.jeffersonfreestate.org/hh/
> >> >> >> Its making much MUCH higher RPM and between 11.5 - 12.5 volts.
> >> >> >> Still fine tuning the jet angles, but that part is working
> >> >> >> great. Man just a little change in angle can make a big
> >> >> >> difference in power.
> >> >> >> Still have shaft coupler issues. Need to drill and tap the new
> >> >> >> coupler so I can bolt them together. The coupler wasn't
> >> >> >> designed to run virtical so I kinda suspected it'd be a
> >> >> >> problem. Its the only one I could find that would transition
> >> >> >> from the GM alternator to 1/2 inch without having a special
> >> >> >> coupler built.
> >> >> >> Getting rid of the right angles and increasing the pipe
> >> >> >> diameter feeding the jets made a huge difference. That and I
> >> >> >> bored out the jets to 1/8th inch and polished them on the
> >> >> >> inside. I think its as good as I can get for now.
> >> >> >> As for the shaft I have a plan to weld up a small support
> >> >> >> around it and add a bearing if the cupler drill and tap doesn't
> >> >> >> fix the problem.
> >> >> >> thats all!
> >> >> >> -z
> >> >> > Interesting. Scrap the coupling. shorten the impeller shaft. Use
> >> >> > a boss on the impeller shaft drilled and tapped to replace the
> >> >> > nut on the alt shaft, screw directly to alt. Flat disc on shaft
> >> >> > near boss to act as water slinger to keep alt dry.
> >> >> Yes that was the idea originally, but man. Its been REALLY hard
> >> >> to find anyone who can tap that GM 19mm fine thread. No machine
> >> >> shop, no metal working buddy of mine had that tap, or could even
> >> >> figure out where to order it. I had a coupler bored out to 19mm
> >> >> on one side and 1/2 inch on the other, but it wasn't quite right
> >> >> on the money, and again at high RPM it caused all kinds of
> >> >> vibration.
> >> >> The other idea was to find a long nut that would thread onto the
> >> >> alternator and then weld a 1/2 inch nut on that, so the shaft
> >> >> could just be a long 1/2 inch bolt with the pelton wheel on the
> >> >> end, but again.. I couldn't find one anywhere!
> >> >> Those guys at Epicenter order the GM threaded couplers in bulk
> >> >> from a speciality outfit. To have them make just one for me would
> >> >> cost a lot more than I want to spend at the moment.
> >> >> > The closer the impeller to the alt the less need for further
> >> >> > shaft support. From the looks of it you could probably get the
> >> >> > impeller within two inches of the alt.
> >> >> yeah. I may shorten the shaft. I'd have to move the jets higher
> >> >> and so on. No reason to screw with that until I can get the
> >> >> coupler to work, which I think it will.
> >> >> I'll drill and tap three holes to keep it balanced and then i'll
> >> >> be able to lock them together. Then i'll run the tests again and
> >> >> see how much shaft length and extra supports I'll need.
> >> >> Stupid GM threads though -- believe me thats been the hardest part
> >> >> of this whole damn project!!!
> >> >> thanks
> >> >> -z
> >> > Can you provide a nut.
> >> I may take you up on that if the current system doesn't work out. I
> >> wasn't able to find one long enough to provide enough threading and
> >> enough space to weld.
> >> cheers
> > The nut as is can be used, length does not matter. Typically alt shaft
> > nuts are really only half nuts. With a nut, an adapter can be made.
> Thanks a lot for the offer of help but drilling and tapping the coupler
> did the trick. Stable at 1000 RPM!!!
> update:http://www.jeffersonfreestate.org/hh/
> cheers
> -zachary
Great, Have fun. Have a look at Spence's axial flux gen. Could be
better than the GM alt.
Posted by z on February 13, 2008, 7:14 pm
bealiba@gmail.com wrote in
>> beal...@gmail.com wrote
>> om:
>>
>>
>>
>> >> beal...@gmail.com wrote
>> >> .co m:
>>
>> >> >> beal...@gmail.com wrote
>> >> >> ups .co m:
>>
>> >> >> >> Got the thing running this weekend
>>
>> >> >> >>http://www.jeffersonfreestate.org/hh/
>>
>> >> >> >> Its making much MUCH higher RPM and between 11.5 - 12.5
>> >> >> >> volts. Still fine tuning the jet angles, but that part is
>> >> >> >> working great. Man just a little change in angle can make a
>> >> >> >> big difference in power.
>>
>> >> >> >> Still have shaft coupler issues. Need to drill and tap the
>> >> >> >> new coupler so I can bolt them together. The coupler wasn't
>> >> >> >> designed to run virtical so I kinda suspected it'd be a
>> >> >> >> problem. Its the only one I could find that would
>> >> >> >> transition from the GM alternator to 1/2 inch without having
>> >> >> >> a special coupler built.
>>
>> >> >> >> Getting rid of the right angles and increasing the pipe
>> >> >> >> diameter feeding the jets made a huge difference. That and
>> >> >> >> I bored out the jets to 1/8th inch and polished them on the
>> >> >> >> inside. I think its as good as I can get for now.
>>
>> >> >> >> As for the shaft I have a plan to weld up a small support
>> >> >> >> around it and add a bearing if the cupler drill and tap
>> >> >> >> doesn't fix the problem.
>>
>> >> >> >> thats all!
>>
>> >> >> >> -z
>>
>> >> >> > Interesting. Scrap the coupling. shorten the impeller shaft.
>> >> >> > Use a boss on the impeller shaft drilled and tapped to
>> >> >> > replace the nut on the alt shaft, screw directly to alt. Flat
>> >> >> > disc on shaft near boss to act as water slinger to keep alt
>> >> >> > dry.
>>
>> >> >> Yes that was the idea originally, but man. Its been REALLY
>> >> >> hard to find anyone who can tap that GM 19mm fine thread. No
>> >> >> machine shop, no metal working buddy of mine had that tap, or
>> >> >> could even figure out where to order it. I had a coupler bored
>> >> >> out to 19mm on one side and 1/2 inch on the other, but it
>> >> >> wasn't quite right on the money, and again at high RPM it
>> >> >> caused all kinds of vibration.
>>
>> >> >> The other idea was to find a long nut that would thread onto
>> >> >> the alternator and then weld a 1/2 inch nut on that, so the
>> >> >> shaft could just be a long 1/2 inch bolt with the pelton wheel
>> >> >> on the end, but again.. I couldn't find one anywhere!
>>
>> >> >> Those guys at Epicenter order the GM threaded couplers in bulk
>> >> >> from a speciality outfit. To have them make just one for me
>> >> >> would cost a lot more than I want to spend at the moment.
>>
>> >> >> > The closer the impeller to the alt the less need for further
>> >> >> > shaft support. From the looks of it you could probably get
>> >> >> > the impeller within two inches of the alt.
>>
>> >> >> yeah. I may shorten the shaft. I'd have to move the jets
>> >> >> higher and so on. No reason to screw with that until I can get
>> >> >> the coupler to work, which I think it will.
>>
>> >> >> I'll drill and tap three holes to keep it balanced and then
>> >> >> i'll be able to lock them together. Then i'll run the tests
>> >> >> again and see how much shaft length and extra supports I'll
>> >> >> need.
>>
>> >> >> Stupid GM threads though -- believe me thats been the hardest
>> >> >> part of this whole damn project!!!
>>
>> >> >> thanks
>>
>> >> >> -z
>>
>> >> > Can you provide a nut.
>>
>> >> I may take you up on that if the current system doesn't work out.
>> >> I wasn't able to find one long enough to provide enough threading
>> >> and enough space to weld.
>>
>> >> cheers
>>
>> > The nut as is can be used, length does not matter. Typically alt
>> > shaft nuts are really only half nuts. With a nut, an adapter can be
>> > made.
>>
>> Thanks a lot for the offer of help but drilling and tapping the
>> coupler did the trick. Stable at 1000 RPM!!!
>>
>> update:http://www.jeffersonfreestate.org/hh/
>>
>> cheers
>>
>> -zachary
>
> Great, Have fun. Have a look at Spence's axial flux gen. Could be
> better than the GM alt.
>
Heh.. those look pretty cool. Not quite ready to take the damn thing
apart and change it at the moment. Need to invest in a new set of
batteries and a better inverter first.
The GM alternator is really a recored PMA in the GM case by windbluepower
so its going to have to be good enough for now. It just has the same
form factor and threads as the GM. Also I suppose I could put it on my
truck this summer when the water runs out :)
Posted by wmbjkREMOVE on February 11, 2008, 7:49 pm
>17mm 1.25 (20 tpi)
Best to just have someone turn exactly what you need. If you must do
it by hand, then 11/16-20 might do with careful fitting.
http://www.mcmaster.com/ , pg. 2481, 2497.
Wayne
Posted by Pete C. on February 11, 2008, 8:09 pm
wmbjkREMOVE@citlink.net wrote:
>
>
> >17mm 1.25 (20 tpi)
>
> Best to just have someone turn exactly what you need. If you must do
> it by hand, then 11/16-20 might do with careful fitting.
> http://www.mcmaster.com/ , pg. 2481, 2497.
>
> Wayne
You (OP) might find someone who would fab a coupling for little cost
over on rec.crafts.metalworking. I'd do it, but I'm not setup for metric
threading currently.
Posted by z on February 12, 2008, 3:17 pm
> wmbjkREMOVE@citlink.net wrote:
>>
>>
>> >17mm 1.25 (20 tpi)
>>
>> Best to just have someone turn exactly what you need. If you must do
>> it by hand, then 11/16-20 might do with careful fitting.
>> http://www.mcmaster.com/ , pg. 2481, 2497.
>>
>> Wayne
>
> You (OP) might find someone who would fab a coupling for little cost
> over on rec.crafts.metalworking. I'd do it, but I'm not setup for
metric
> threading currently.
thanks for all the advice.
Today i'm going to see if I can drill and tap the one I have to make it
work. If it fails i'll check out the other options for sure.
All the guys around here don't have metric threading capabilities either,
but i'm sure I could find one somewhere.
cheers
-z
XML site map
> >> beal...@gmail.com wrote
> >> m:
> >> >> beal...@gmail.com wrote
> >> >> .co m:
> >> >> >> Got the thing running this weekend
> >> >> >>http://www.jeffersonfreestate.org/hh/
> >> >> >> Its making much MUCH higher RPM and between 11.5 - 12.5 volts.
> >> >> >> Still fine tuning the jet angles, but that part is working
> >> >> >> great. Man just a little change in angle can make a big
> >> >> >> difference in power.
> >> >> >> Still have shaft coupler issues. Need to drill and tap the new
> >> >> >> coupler so I can bolt them together. The coupler wasn't
> >> >> >> designed to run virtical so I kinda suspected it'd be a
> >> >> >> problem. Its the only one I could find that would transition
> >> >> >> from the GM alternator to 1/2 inch without having a special
> >> >> >> coupler built.
> >> >> >> Getting rid of the right angles and increasing the pipe
> >> >> >> diameter feeding the jets made a huge difference. That and I
> >> >> >> bored out the jets to 1/8th inch and polished them on the
> >> >> >> inside. I think its as good as I can get for now.
> >> >> >> As for the shaft I have a plan to weld up a small support
> >> >> >> around it and add a bearing if the cupler drill and tap doesn't
> >> >> >> fix the problem.
> >> >> >> thats all!
> >> >> >> -z
> >> >> > Interesting. Scrap the coupling. shorten the impeller shaft. Use
> >> >> > a boss on the impeller shaft drilled and tapped to replace the
> >> >> > nut on the alt shaft, screw directly to alt. Flat disc on shaft
> >> >> > near boss to act as water slinger to keep alt dry.
> >> >> Yes that was the idea originally, but man. Its been REALLY hard
> >> >> to find anyone who can tap that GM 19mm fine thread. No machine
> >> >> shop, no metal working buddy of mine had that tap, or could even
> >> >> figure out where to order it. I had a coupler bored out to 19mm
> >> >> on one side and 1/2 inch on the other, but it wasn't quite right
> >> >> on the money, and again at high RPM it caused all kinds of
> >> >> vibration.
> >> >> The other idea was to find a long nut that would thread onto the
> >> >> alternator and then weld a 1/2 inch nut on that, so the shaft
> >> >> could just be a long 1/2 inch bolt with the pelton wheel on the
> >> >> end, but again.. I couldn't find one anywhere!
> >> >> Those guys at Epicenter order the GM threaded couplers in bulk
> >> >> from a speciality outfit. To have them make just one for me would
> >> >> cost a lot more than I want to spend at the moment.
> >> >> > The closer the impeller to the alt the less need for further
> >> >> > shaft support. From the looks of it you could probably get the
> >> >> > impeller within two inches of the alt.
> >> >> yeah. I may shorten the shaft. I'd have to move the jets higher
> >> >> and so on. No reason to screw with that until I can get the
> >> >> coupler to work, which I think it will.
> >> >> I'll drill and tap three holes to keep it balanced and then i'll
> >> >> be able to lock them together. Then i'll run the tests again and
> >> >> see how much shaft length and extra supports I'll need.
> >> >> Stupid GM threads though -- believe me thats been the hardest part
> >> >> of this whole damn project!!!
> >> >> thanks
> >> >> -z
> >> > Can you provide a nut.
> >> I may take you up on that if the current system doesn't work out. I
> >> wasn't able to find one long enough to provide enough threading and
> >> enough space to weld.
> >> cheers
> > The nut as is can be used, length does not matter. Typically alt shaft
> > nuts are really only half nuts. With a nut, an adapter can be made.
> Thanks a lot for the offer of help but drilling and tapping the coupler
> did the trick. Stable at 1000 RPM!!!
> update:http://www.jeffersonfreestate.org/hh/
> cheers
> -zachary