recumpence
1 GW
liveforphysics said:
But, can you tell me the average accumulation of bat guano in that nation anually?
How about the number of mountain goats? :wink:
Matt
So, who's hiding a project?
- Thread starter recumpence
- Start date
But, can you tell me the average accumulation of bat guano in that nation anually?
How about the number of mountain goats? :wink:
Matt
Back to new projects...
Here's mine so far.
Long story to this one but it's coming through. I'm testing it whenever the temperature goes over 0.
Some specs: It's a dual-motor in parallel 2 X Currie 1500W, 53V 12/14A/h A123 batteries with a 48V 100A KDS Kelly controller (in a bigger casing) with a NuVinci variable transmission laced to a 24inch wheel with a #25 chain set-up at 125t/11t direct drive since the motors are attached to the swingarm (no in-between). The human pedals are totally independent from the electric drive. The wheel is free but if I pedal, I drive the motors as well. If the motor drives me, the pedals are free. I can assist till I reach about 40km/h, then there's no use.
So, you can see that it's a fine bike to start with: Y-frame, hydraulic disc brakes, 5-6 inches of suspension both ways and the split battery set-up to keep it balanced and narrow. It handles very well.
So far, I know that the dual-motors do drive the NuVinci hub in a respectable way. It could be geared down a bit more to make use of the full range of the transmission (but so far so good). As far as I could give a bit of attention to the CycleAnalyst, my voltage goes from 53V to about 38V when accelerating for about 2500W of energy requested. When the motor reaches it ultimate speed (in a lower gear ratio), the amps lower to a result of about 1600W. It's hard to ride in traffic and check these things at the same time. I don't know my maximum speed yet but I've tried the bike on a steep incline and I was happy with it. It pulled me up steadily.
My worry right now is that it seems that the batteries get very hot. I suppose that's normal because they're giving a lot of amps. I had a lot of surprises welding these together and I wouldn't be surprised if some of the welds gave up. I'll test the bike a few more times and unwrap the batteries to see what up with them. So far so good but I think they get a lot warmer than the motors and I have to be aware of the situation until it poses no treat.
That's it so far. The batteries need to be recharged/discharged a few times. I try to have a little fun in the snow. It pulls o.k.
Maybe someone knows whether the A123 should be allowed to heat up under stress. I had that when I was running NiHms and nothing ever happened. Comments?
Here's mine so far.
Long story to this one but it's coming through. I'm testing it whenever the temperature goes over 0.
Some specs: It's a dual-motor in parallel 2 X Currie 1500W, 53V 12/14A/h A123 batteries with a 48V 100A KDS Kelly controller (in a bigger casing) with a NuVinci variable transmission laced to a 24inch wheel with a #25 chain set-up at 125t/11t direct drive since the motors are attached to the swingarm (no in-between). The human pedals are totally independent from the electric drive. The wheel is free but if I pedal, I drive the motors as well. If the motor drives me, the pedals are free. I can assist till I reach about 40km/h, then there's no use.
So, you can see that it's a fine bike to start with: Y-frame, hydraulic disc brakes, 5-6 inches of suspension both ways and the split battery set-up to keep it balanced and narrow. It handles very well.
So far, I know that the dual-motors do drive the NuVinci hub in a respectable way. It could be geared down a bit more to make use of the full range of the transmission (but so far so good). As far as I could give a bit of attention to the CycleAnalyst, my voltage goes from 53V to about 38V when accelerating for about 2500W of energy requested. When the motor reaches it ultimate speed (in a lower gear ratio), the amps lower to a result of about 1600W. It's hard to ride in traffic and check these things at the same time. I don't know my maximum speed yet but I've tried the bike on a steep incline and I was happy with it. It pulled me up steadily.
My worry right now is that it seems that the batteries get very hot. I suppose that's normal because they're giving a lot of amps. I had a lot of surprises welding these together and I wouldn't be surprised if some of the welds gave up. I'll test the bike a few more times and unwrap the batteries to see what up with them. So far so good but I think they get a lot warmer than the motors and I have to be aware of the situation until it poses no treat.
That's it so far. The batteries need to be recharged/discharged a few times. I try to have a little fun in the snow. It pulls o.k.
Maybe someone knows whether the A123 should be allowed to heat up under stress. I had that when I was running NiHms and nothing ever happened. Comments?
briangv99
1 kW
Hi, one of a few projects. Still a lot tidying up work to do and must fit the Evlogix control box, have burnt up one Turnigy c80-100 already pulling 180amps or 8kW one too many times 
. Power wheelies in all gears 
Specs -
Turnigyy C80-100-130
Castle HV110
MS drive #25 chain primary 4.6:1
Secondary 13t Odyssey to 60T Vuelta sprocket
Nexus 3 speed (disc brake)
12s2p Rhino Lipo
. Power wheelies in all gears
Specs -
Turnigyy C80-100-130
Castle HV110
MS drive #25 chain primary 4.6:1
Secondary 13t Odyssey to 60T Vuelta sprocket
Nexus 3 speed (disc brake)
12s2p Rhino Lipo
vanilla ice
1 MW
Kewl! 8)
Details on the down tube mounting bracket??
Details on the down tube mounting bracket??
briangv99
1 kW
hi Vanilla,
mounting brackets for Matt's MS drive are sold by Matt, mine are the 2" brackets. Only problem most mountain bikes don't seem to have a round bottom tube these day, seem to have a triangular profile. That's why I used my old Giant Rincon for this conversion, perfect fit for the clamps, no slip what so ever. Used a Black Spire bottom bracket mounted chain guide to run the motor chain under the bottom bracket.
Brian
mounting brackets for Matt's MS drive are sold by Matt, mine are the 2" brackets. Only problem most mountain bikes don't seem to have a round bottom tube these day, seem to have a triangular profile. That's why I used my old Giant Rincon for this conversion, perfect fit for the clamps, no slip what so ever. Used a Black Spire bottom bracket mounted chain guide to run the motor chain under the bottom bracket.
Brian
12p3phPMDC
1 kW
- Joined
- Mar 16, 2009
- Messages
- 462
Brian
How much abuse have you given the NEXUS 3 speed....sounds like you haven't let up one bit...!
How much abuse have you given the NEXUS 3 speed....sounds like you haven't let up one bit...!
12p3phPMDC
1 kW
- Joined
- Mar 16, 2009
- Messages
- 462
Tapholov,
Looks like a great build! I like how you tucked the cyclones under the swing arm.
Looks like a great build! I like how you tucked the cyclones under the swing arm.
Hi.
Yes I'm using a #25 chain and it's proven to be really strong as long as everything, including the tensioner, is well aligned. Right now, it's a regular #25 but as soon as I stop lengthening or shortening it depending on the sprocket I'm using, I'll switch to a more heavy-duty one which I already have. The plates are thicker. But so far so good. It has a little 'zzzzzzz' sound but it's not that bad nor loud and I do not have to use a gear reduction axle in-between the motors and the wheel. After having dealt with a triple chained bike (that still works very well), I wanted simple. I got the chain from a go-kart parts supplier, like 10 feet and a couple of connecting links, they're small.
Yes, the bike is hefty, very solid and a little heavy at about 80lbs. I do carry it up and down the stairs at home and all three bikes I have now are around the same weight. I would save a bit if I wasn't using the NuVinci hub and I'm planning to do that just to see, it's just that the wheel I bought online in January never made it to me. So, that'll be later. I have tried the bike since I've added the A123 battery pack and boy... does it move. There's a lot of current going through these babies. I'm reopening the packs these days to make sure that all the connections are holding up. I caught a few problems there but it'll soon be fixed.
It helps that the motors are connected to the swingarm so the chain doesn't have to adapt to movements so much. Everything moves together but my center of gravity is centered and the rear wheel doesn't feel heavy.
I choose that Y-frame specifically because of the space available under the swingarm. I could see the potential but only upon receiving the frame did it confirm my good guess. I've saw-off the tube that would normally hold the front derailler (there was also a plate meant to hold a bike stand in there) and in order to get more room, I used a 24" wheel. No problem brake-wise because it's disc and, well, I already had it laced up to the NuVinci hub. It's a close fit between the wheel and the motors but it makes for a very pleasantly hidden look.
So far, so good.
BTW, I really like your set-up Brian and I was curious as to how you've been able to put two gears on that Nexus. I also use the 60Th Vuelta. Nothing like like pedaling at high speed, right?
Tapholov
Yes I'm using a #25 chain and it's proven to be really strong as long as everything, including the tensioner, is well aligned. Right now, it's a regular #25 but as soon as I stop lengthening or shortening it depending on the sprocket I'm using, I'll switch to a more heavy-duty one which I already have. The plates are thicker. But so far so good. It has a little 'zzzzzzz' sound but it's not that bad nor loud and I do not have to use a gear reduction axle in-between the motors and the wheel. After having dealt with a triple chained bike (that still works very well), I wanted simple. I got the chain from a go-kart parts supplier, like 10 feet and a couple of connecting links, they're small.
Yes, the bike is hefty, very solid and a little heavy at about 80lbs. I do carry it up and down the stairs at home and all three bikes I have now are around the same weight. I would save a bit if I wasn't using the NuVinci hub and I'm planning to do that just to see, it's just that the wheel I bought online in January never made it to me. So, that'll be later. I have tried the bike since I've added the A123 battery pack and boy... does it move. There's a lot of current going through these babies. I'm reopening the packs these days to make sure that all the connections are holding up. I caught a few problems there but it'll soon be fixed.
It helps that the motors are connected to the swingarm so the chain doesn't have to adapt to movements so much. Everything moves together but my center of gravity is centered and the rear wheel doesn't feel heavy.
I choose that Y-frame specifically because of the space available under the swingarm. I could see the potential but only upon receiving the frame did it confirm my good guess. I've saw-off the tube that would normally hold the front derailler (there was also a plate meant to hold a bike stand in there) and in order to get more room, I used a 24" wheel. No problem brake-wise because it's disc and, well, I already had it laced up to the NuVinci hub. It's a close fit between the wheel and the motors but it makes for a very pleasantly hidden look.
So far, so good.
BTW, I really like your set-up Brian and I was curious as to how you've been able to put two gears on that Nexus. I also use the 60Th Vuelta. Nothing like like pedaling at high speed, right?
Tapholov
briangv99
1 kW
hi 12p, I haven't put many miles on the Nexus 3 so far, but the few that I have had full power launches. So far not one complaint from the hub, smooth changes and no strange noises. Hope it stays that way.
Tapholov, love your #25 chain direct drive setup, very slick installation.
The dual sprockets on mine are attached with one of GGoodrum's freewheel adaptors, needed a bit of tinkering to get everything to fit, but seems very solid now. Love the big Vuelta sprocket for high speed pedaling
Tapholov, love your #25 chain direct drive setup, very slick installation.
The dual sprockets on mine are attached with one of GGoodrum's freewheel adaptors, needed a bit of tinkering to get everything to fit, but seems very solid now. Love the big Vuelta sprocket for high speed pedaling
dontsendbubbamail
10 kW
- Joined
- May 28, 2008
- Messages
- 718
dequinox
10 kW
tapholov said:
Hi tapholov, NICE project. Do you have any videos of it in action yet?
Also where did you get the currie motors? Are they brushless? I'm looking for a source and I like the size of the currie motor...plus I already have on on my bike so it would be a good fit.
Hi Brian,
Thanks for the pic. Although I'm using the NuVinci hub, I figured out sometime ago that there should only be 2-3 gear to an e-bike, low and high and I might try that later on because I feel that the NuVinci hub robs me of a lot of power despite it's sophistication.
Can I suggest that you use chain tensioners to keep thing going and going. Slack is good but these chains are used up to their limits. I usually pedal while accelerating but most of the time, I pedal backward and alignment and tightness is expected to keep the chain on its sprocket. Nothing more embarassing that zooming ahead of a cyclist only to be stuck with a derailled chain further on.
I'm happy to see new projects in their final stage.
I'm planning a new video as soon as the weather permits. It has to do with climbing abilities and I'll compare the new bike with my dual Golden motor bike. I have this steep incline nearby that I use and I know that both bikes can do it. I'm curious as to which one makes it faster. It's hard to tell because I've gotten used to the pull but I can't really say for sure whether one pulls more than the other. Soon on Youtube and this forum which I like very much.
Dequinox, I got the currie motors from ebay, the seller claimed that they were 1500W. They are brushed which is simpler wire-wise but they do not seem to be as efficient as brushless. On my triple-chained bike, I run a BMC 750W brushless motor and it seems to pull a lot more on its own (I wish I had the money to put two together). The reason I went for the Curries was the claimed wattage and I thought that would drive the NuVinci hub properly. The problem with the dual motors is that it requires a lot of power and only with the A123 batteries did I get that (and they're a pain in the a... to solder). I'm fixing the pack right now and I'll soon be out again, weather permitting.
Thanks for the pic. Although I'm using the NuVinci hub, I figured out sometime ago that there should only be 2-3 gear to an e-bike, low and high and I might try that later on because I feel that the NuVinci hub robs me of a lot of power despite it's sophistication.
Can I suggest that you use chain tensioners to keep thing going and going. Slack is good but these chains are used up to their limits. I usually pedal while accelerating but most of the time, I pedal backward and alignment and tightness is expected to keep the chain on its sprocket. Nothing more embarassing that zooming ahead of a cyclist only to be stuck with a derailled chain further on.
I'm happy to see new projects in their final stage.
I'm planning a new video as soon as the weather permits. It has to do with climbing abilities and I'll compare the new bike with my dual Golden motor bike. I have this steep incline nearby that I use and I know that both bikes can do it. I'm curious as to which one makes it faster. It's hard to tell because I've gotten used to the pull but I can't really say for sure whether one pulls more than the other. Soon on Youtube and this forum which I like very much.
Dequinox, I got the currie motors from ebay, the seller claimed that they were 1500W. They are brushed which is simpler wire-wise but they do not seem to be as efficient as brushless. On my triple-chained bike, I run a BMC 750W brushless motor and it seems to pull a lot more on its own (I wish I had the money to put two together). The reason I went for the Curries was the claimed wattage and I thought that would drive the NuVinci hub properly. The problem with the dual motors is that it requires a lot of power and only with the A123 batteries did I get that (and they're a pain in the a... to solder). I'm fixing the pack right now and I'll soon be out again, weather permitting.
briangv99
1 kW
hey Bubba, the 60t #25 sprocket is from SDP-SI.com, but I did cut out the steel centre section with a hole saw and fit up an aluminium hub I turned up on the lathe. Saves about 100grams or so, but am planning lightening holes, more for looks than any real weight saving.
hi Tapholov, yep a chain tensioner would be useful, but will have to work out where to squeeze it in, the Nexus's external change mechanism makes it a bit difficult to hang a conventional tensioner off the derailer hanger. Am sure can come up with some. Agree two or three gears for the motor seems about right, but a few more gears for pedaling wouldn't go astray.
Am looking forward to some video of your bike in action. I'm waiting for a HobbyCity order that has a Turnigy micro SD camera so might be able to get some on board video soon.
hi Tapholov, yep a chain tensioner would be useful, but will have to work out where to squeeze it in, the Nexus's external change mechanism makes it a bit difficult to hang a conventional tensioner off the derailer hanger. Am sure can come up with some. Agree two or three gears for the motor seems about right, but a few more gears for pedaling wouldn't go astray.
Am looking forward to some video of your bike in action. I'm waiting for a HobbyCity order that has a Turnigy micro SD camera so might be able to get some on board video soon.
etard
100 kW
Tapholov,
Forget about the bike, where did you get the giant slinky!!!??? :lol:
Forget about the bike, where did you get the giant slinky!!!???
:lol:Hi etard,
Yes, it's quite a slinky! That was from e-bay and from one of those liquidation-type operation. It was very cheap (like a dime + shipping) and I thought it would be somewhat small and then this thing comes in a big plastic bucket. I have no idea what it is meant to be used for but it's very heavy. I've stretched it across the apartment for demonstration and you can send a wave through it's length and it reverberates for ever and makes quite a racket. I've planned on trying it 'slinky-like' on big huge steps and see whether it'll flip itself down and if I ever get to do this, I'll video it. Quite a piece of conversation and absolutely useless.
Yes, it's quite a slinky! That was from e-bay and from one of those liquidation-type operation. It was very cheap (like a dime + shipping) and I thought it would be somewhat small and then this thing comes in a big plastic bucket. I have no idea what it is meant to be used for but it's very heavy. I've stretched it across the apartment for demonstration and you can send a wave through it's length and it reverberates for ever and makes quite a racket. I've planned on trying it 'slinky-like' on big huge steps and see whether it'll flip itself down and if I ever get to do this, I'll video it. Quite a piece of conversation and absolutely useless.
etard
100 kW
I don't like this thread! You guys should be posting your own build threads, both systems are groundbreaking and unique. Brian has the only other version of the ggoodrum sprocket adapter I have seen, and Tapholov has the only dual motors swingarm mount design. I would love to see more details and action videos of these too. And I definately will need a video of the slinky!!
Hi,
Some updates: I fixed the batteries and they don't seem to overheat anymore, at least the wires that connect the series have been beefed-up. I ran the bike a bit and the motors have smelled like they're burning. I guessed that the 100A capacity of the Kelly Controller was a little too much. I've reprogrammed the Amps to 60A maximum. A little less acceleration but no more burnt smell. I'll have to open these two motors to see if there is anything left to those brushes. At least I'm happy with the fact that the motors pulled and pulled and the bike is fun to ride.
I went for another ride last thursday and ended up on a very, very icy mountain road and I slid in a corner at 30/35 km/h. I was fine, picked myself up, rode back home and got the bike up the three flights of stairs and that was it! I was in pain. Have been in pain ever since. My poor right shoulder can't take these falls anymore.
And i'm heading to London tomorrow. I had wished that the holidays would have been fun with me making ebike videos and maybe a little slinky video but it'll have to wait.
Sorry, but I'll be back and healed in April and the riding conditions will also be much better.
See you then!
T.
Some updates: I fixed the batteries and they don't seem to overheat anymore, at least the wires that connect the series have been beefed-up. I ran the bike a bit and the motors have smelled like they're burning. I guessed that the 100A capacity of the Kelly Controller was a little too much. I've reprogrammed the Amps to 60A maximum. A little less acceleration but no more burnt smell. I'll have to open these two motors to see if there is anything left to those brushes. At least I'm happy with the fact that the motors pulled and pulled and the bike is fun to ride.
I went for another ride last thursday and ended up on a very, very icy mountain road and I slid in a corner at 30/35 km/h. I was fine, picked myself up, rode back home and got the bike up the three flights of stairs and that was it! I was in pain. Have been in pain ever since. My poor right shoulder can't take these falls anymore.
And i'm heading to London tomorrow. I had wished that the holidays would have been fun with me making ebike videos and maybe a little slinky video but it'll have to wait.
Sorry, but I'll be back and healed in April and the riding conditions will also be much better.
See you then!
T.
TylerDurden
100 GW
I enjoyed that video very much. The wind noise makes it very dramatic, it sounds like rocket-thrust. (It would not be very difficult to tame it down a bit.)
The bike seems quite nice, for two simple motors.
(It would not be very difficult to tame it down a bit.)The bike seems quite nice, for two simple motors.
Got a picture of the camera? Depending on where the lens is vs the mic hole, you can make a giant open-cell foam block around the camera that will help a lot with the noise. If it has a plug for an external mic, you can use that instead, and setup the mic with it's own "wind sock" like that and point it so that the wind doesn't impinge directly into the diaphragm, either.
AussieJester
1 TW
tapholov said:
There is put a piece of sellotape (the stuff you use to wrap presents with..) over the microphone you will still pick up noise but the wind wont interfere with it...
KiM
todayican2
100 W
- Joined
- Apr 22, 2009
- Messages
- 139
Ive got 3 projects going
1) The 250 gas trike, ready for body building to commence.
http://vid294.photobucket.com/albums/mm82/tshtrikes/S7300071-1.flv
2) the 2 seater gas electric, just now getting the ice mounted and ready for gen, motor, drive bits
3) the electric recumbent motorcycle. I was to build this for some partners who were to take it once framed and add body, hub motor and the partners seem to have lost interest, not getting any response from emails. at this point I would sell it for a kiss and a kind word (or some motor / controller parts) The photo depects it at an earlier stage of construction, it is now a full roller, stouter front end, shocks in the rear, brakes all around ets and more framing in the seat area, need to find the current pictures.
1) The 250 gas trike, ready for body building to commence.
http://vid294.photobucket.com/albums/mm82/tshtrikes/S7300071-1.flv
2) the 2 seater gas electric, just now getting the ice mounted and ready for gen, motor, drive bits
3) the electric recumbent motorcycle. I was to build this for some partners who were to take it once framed and add body, hub motor and the partners seem to have lost interest, not getting any response from emails. at this point I would sell it for a kiss and a kind word (or some motor / controller parts) The photo depects it at an earlier stage of construction, it is now a full roller, stouter front end, shocks in the rear, brakes all around ets and more framing in the seat area, need to find the current pictures.
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bzhwindtalker
100 kW
your motorcycle just look Uppercool! I like it!
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