...let me try! [low-cost street bike] -- last steps...

a very small update.. :)

this w.e. I tested the bike a lot to found out the physiological problems.
The main is related to the frame, at 50km/h (30mph) it starts to be dangerous with no shock fork.

no money here (you've been warned :D ) so I'm now working to mount an oil shock from an old moped. so heavy but so cheap :wink:

12%2520-%25202.jpg


I'm also modifying a rear weel hub to mount a disk brake.

12%2520-%25201.jpg


got exams next days, so even if I work at night I'll go slowly.. :(


Thanks for following!
 
recumpence said:
Man, I gotta say, this is one of the finest budgt builds I have seen.

Matt
Click to expand...

thanks Matt, your advices are what feed my work!

I'm sure that even without an high budget is possible to build something good. The clue is to find the right way :wink:
 
silvocross said:
recumpence said:
Man, I gotta say, this is one of the finest budgt builds I have seen.

Matt
Click to expand...

thanks Matt, your advices are what feed my work!

I'm sure that even without an high budget is possible to build something good. The clue is to find the right way :wink:
Click to expand...
Agreed. :)

I find many dudget builds to look, well, "Budget". However, this one is very well thought out and well executed.

That is what prompted my comment.

Keep the updates coming!

Matt
 
Ok now I've got a shock fork :D

I've modified an oil shock from a moped, it works very good compared to a cheap bike shock.

12%2520-%25201.jpg


12%2520-%25202.jpg


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It doesn't look very good, but at the moment it's the best option.

Waiting for the disk brake, now!
 
silvocross said:
It doesn't look very good, but at the moment it's the best option.

Waiting for the disk brake, now!
Click to expand...

Not agreed, it looks good, mate....for the nature of the build it's an awesome custom work. from what kind moped this fork comes out?

Looking forward to see the gear drive in action :)

Jules
 
ok so I made a video as requested.

still missing so much things to finish it, but at least you can hear the sound of gears.

I'm sorry for the bad audio quality of the camera (the sound seems i-i-i-i-i-i-i-i-i, It's iiiiiiiiiiiiiiiiiiiiii instead :p ), and I'm sorry for the cameraman (my mother) that loses me.

http://youtu.be/6gO_iAw-n8s
 
From what you get from the video it sounds awesome, its gunna get you noticed :D , can't be bad. The size is good from just the photos it looks a bit stretched.
You have me thinking now, higher Kv motor and a high low speed combo. oooh


sound a lot like a light cycle, :D http://www.youtube.com/watch?feature=player_detailpage&v=GNfs6v7i7eY#t=43s
 
silvocross said:
ok so I made a video as requested.

still missing so much things to finish it, but at least you can hear the sound of gears.

I'm sorry for the bad audio quality of the camera (the sound seems i-i-i-i-i-i-i-i-i, It's iiiiiiiiiiiiiiiiiiiiii instead :p ), and I'm sorry for the cameraman (my mother) that loses me.

http://youtu.be/6gO_iAw-n8s
Click to expand...

Great!!!!

This could be in fact one of the best (and fastest indeed) low cost builds I've seen so far....and the result until now looks even better than most of 2X pricey builds......BRAVO! 8) 8)

Jules
 
a quick step ahead... :roll:

The brake isn't arrived yet, so today I made a small rear light.
I didn't want to discharge in different ways the 4 batteries using 12V lights, so i run 15 LED in series and a 400ohm resistor at 50V, the light takes about 20 mA (so 1W) with a very good lighting power.

in the picture you can also see the charging plug:

12%2520-%25201.jpg
 
ok so I finished the design of the front hub.

I can't use shorter rims, I haven't access to a mill and I can't weld alluminium, so the design wasn't so easy and the hub will not be so light, but as usual, it should work... :D

I haven't got a good workstation so I'm sorry for the bad quality of the video:

http://youtu.be/Ao-bdVn4_00
 
This bike may be "low cost" but that proves that low cost has nothing to do with low quality. This thing is great! You thinking lipo one day?
 
thanks e-racer!

for sure, lipo batteries would be an huge upgrade for the bike, but at the moment I haven't got the budget..

first I've to finish the bike, then I can think about a new bike with obviously new batteries!
 
ok, I finished the brake and today just arrived the relay, so I mounted the two alluminium sides.

The bike is almost finished, still missing the pvc cover, a new seat and the front light.

so much pics now:

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Istantanea%2520-%252014032012%2520-%252018%253A40%253A19.jpg




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IMG_0669.JPG




bye bye! :wink:
 
the monologue goes on..

wednesday i went to university for the first time, there are 16km total (10 miles) and I adsorbed a little bit more than 6Ah, then batteries died.
Fortunately, I was almost home.
How can I reduce the Perkut effect (batteries are 12Ah)?

In the meantime I added some foam to the aluminium sides so now it's so much quieter.

have a nice day!
 
How is the Dlux holding up? It seems like a fair alternative to castle for 48v rc systems!
There is not much you can do with SLA... When I used some on my first ebike, I used to ride with batts hot from the charger, It helped a fair bit if I recall.
Btw, brillant job with the front hub!
 
bzhwindtalker said:
How is the Dlux holding up? It seems like a fair alternative to castle for 48v rc systems!
Click to expand...

I think it's a really interesting controller, I added 6 caps and I avoided overloads from the trottle, have got no problems at the moment! :)
 
silvocross said:
the monologue goes on..

wednesday i went to university for the first time, there are 16km total (10 miles) and I adsorbed a little bit more than 6Ah, then batteries died.
Fortunately, I was almost home.
How can I reduce the Perkut effect (batteries are 12Ah)?

In the meantime I added some foam to the aluminium sides so now it's so much quieter.

have a nice day!
Click to expand...


Nice build, I envy you guys will skillz :mrgreen:

As for reducing the Perkut Effect; the only thing you can do with SLA's is drain them more slowly (don't go so fast). My first ebike used SLA's and I routinely got 60% out of them and that was taking it easy draining them over 2 hours so your 50% isn't that unusual. Do make sure the batteries are matched and charged to the same level. Check each with a voltmeter after charging or discharging. You can get a little better with high quality, high discharge rate SLA's made specifically for e-vehicle use but the best thing is to go with lithium and don't look back.

-R
 
Russell said:
silvocross said:
the monologue goes on..

wednesday i went to university for the first time, there are 16km total (10 miles) and I adsorbed a little bit more than 6Ah, then batteries died.
Fortunately, I was almost home.
How can I reduce the Perkut effect (batteries are 12Ah)?

In the meantime I added some foam to the aluminium sides so now it's so much quieter.

have a nice day!
Click to expand...


Nice build, I envy you guys will skillz :mrgreen:

As for reducing the Perkut Effect; the only thing you can do with SLA's is drain them more slowly (don't go so fast). My first ebike used SLA's and I routinely got 60% out of them and that was taking it easy draining them over 2 hours so your 50% isn't that unusual. Do make sure the batteries are matched and charged to the same level. Check each with a voltmeter after charging or discharging. You can get a little better with high quality, high discharge rate SLA's made specifically for e-vehicle use but the best thing is to go with lithium and don't look back.

-R
Click to expand...

uhm, so maybe I should have to get about 4Ah of additionally sla's batteries, or move to LI-ions as suggested (too expensive at the moment for my budget)
 
Get hold of a huge pile of used laptop battery for free? This could work, you have a lot of room in that frame for a huge battery! 1-2c cells would not be a problem if you can build a 1kw+ pack
 
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