Lord Gruntfuttock Posted January 17, 2020 Author Share Posted January 17, 2020 Shit that's cool. heaps of room for big batt pack, efficient frame mounted motor, big wheels, discs etc. and a stubby holder.... And yeah definitely a learning curve. I'm thinking of doing a classic electric scooter down the track, an old Tigress or BSA Sunbeam. Reckon putting batteries where the engine was and a grunty hub motor would be a hoot... 5 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted February 29, 2020 Author Share Posted February 29, 2020 Dug the old BSA frame out of the shed for a cleanup... Been putting it off cos I'm a bit over cleaning up old shit, was thinking about putting new bars on... But some steel wool and WD40 and the old bars came out great... Love how good 50+ yr old chrome is... So minor achievement, but should encourage me to get wheels finished so it's rolling at least... 5 Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted March 8, 2020 Share Posted March 8, 2020 that mondo sized trutest ebike is the first ive seen thats made me think, hmm i wouldnt mind an ebike like that. 2 Quote Link to comment Share on other sites More sharing options...
nzstato Posted March 8, 2020 Share Posted March 8, 2020 Buy some powdered oxalic acid and make a mix up. Had incredible success with it in cleaning up chrome parts on bikes. Soak items for a few hours and scrub with a plastic brush. 1 Quote Link to comment Share on other sites More sharing options...
h4nd Posted March 9, 2020 Share Posted March 9, 2020 The escoot I have has a 24V brushed motor, plus chain and sprocket. It's a wee bit noisy, I think I'd prefer (or will add) a brushless front wheel because quieter. Just my $0.02 Quote Link to comment Share on other sites More sharing options...
Willdat? Posted March 9, 2020 Share Posted March 9, 2020 44 minutes ago, h4nd said: The escoot I have has a 24V brushed motor, plus chain and sprocket. It's a wee bit noisy, I think I'd prefer (or will add) a brushless front wheel because quieter. Just my $0.02 Brushless front wheels are great for flat lands but a little average when it comes to hills. Mid drive is great as you can run through the existing drivetrain to adjust gearing. 2 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted March 11, 2020 Author Share Posted March 11, 2020 Well that was disappointing. Went home at lunch to lace up the rear wheel, got started and things went awry pretty quickly, seems the other CR18 rim I have is a 32H. Bugger. Went though old emails and I did buy one 36 and one 32H (in 2015). Can't remember why, but I assumed they were both 36 when I found them in parts pile for this project. Ordered another 36H but my cheap build is getting more expensive... [Edit] vague memory now that the front rim was going on an old Dynohub, think it was 32H and I bought spokes to suit. Suppose I can still lace that up and swap for the motorised front rim if I change my mind in future... 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Lord Gruntfuttock Posted March 29, 2020 Author Popular Post Share Posted March 29, 2020 Lockdown progress. Been truing the wheel while waiting for documents to load remotely in my slow remote office, and put tyre on it last night. Was worried I had no rim tape to protect tube but found some in my hoard of old bits... And what I'm starting with... Widened the front fork slots to fit the motor axle... And stretched the forks out a bit, they were around 86mm and need to be 100mm... And it's not going to look too silly... Clearance on one side slim but ok... But the other was touching... And couldn't slide a washer on cos there's a plug preventing the nut coming off. So bent a spring washer open, slid on over the cable, and closed up again... Old pedal was a bugger to get off, had to get grinder out... And MKS pedals look sweet in white... Adjusted crank bearings and put new seat on too, plus slight panel beating of front guard. Starting to get close... Wasn't going to put seat and pedals on, I like putting new bits on last, but not much else to do until I get rear wheel made up. Hope to get on that this week... 16 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted March 31, 2020 Author Share Posted March 31, 2020 Sat in the sun and laced up rear wheel today. Used spoke washers as the old Sturmey Archer hub has thin flanges, and new spokes have too big a bend radius... Threw it in the wheel stand and bearings were adjusted so loose it wobbled all over the show, so cleaned, greased and adjusted them... And all set up on the home office desk to tinker with... Quite theraputic doing this when stressed, wonder if I could get away with it at work... [Edit] might need 2 washers on each spoke to fit right. Dang, lucky I have time... 8 Quote Link to comment Share on other sites More sharing options...
Popular Post Lord Gruntfuttock Posted April 2, 2020 Author Popular Post Share Posted April 2, 2020 Yeah wasn't happy with a single washer so pulled the spokes and built it again, loosely assembled here with 2 washers on each spoke... And after truing it up this happened... Took it for a blat up the street with no brakes, actually rides really well. Gotta take another couple of links out of the chain yet, surprised to find a new chain, hoarding pays off again... Then once I sort brake cables and see if I can get the gears working it should be a decent old bike. Could even get motoring this week... 13 Quote Link to comment Share on other sites More sharing options...
Ned Posted April 2, 2020 Share Posted April 2, 2020 someone should photoshop that front hub in different colours and see how it looks... stands out like a sore thumb, but might just be the price to pay? Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted April 2, 2020 Author Share Posted April 2, 2020 Yeah did think of painting it silver. Never mind... It's almost same size as dynohub I was going to put on it. Not overly concerned about looks as I still have to fit battery pack, controller, throttle and cables etc. Wonder if I can rig a carrier up in isolation... 1 Quote Link to comment Share on other sites More sharing options...
tortron Posted April 2, 2020 Share Posted April 2, 2020 is it anodised aluminium? some oven cleaner will strip the black off 2 Quote Link to comment Share on other sites More sharing options...
datlow Posted April 3, 2020 Share Posted April 3, 2020 i reckon one of these leather satchels could work well? so then it macthes the six pack 1 1 1 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted April 3, 2020 Author Share Posted April 3, 2020 Measured battery voltages this morning, ranged from 4.09 to 4.16V, so a 0.07V difference. Hooked up some lamps and drained high cells individually while working this morning... Then when all even'ish drained the whole battery over a couple of hours, down to around 3.4v and chucked it on charge again, will see how even the cells are when it's charged... Looked in the garden shed of future treasures and had a couple of old carriers. Of course only the rustiest one fitted... Then lubed the brake cables and reassembled, only really have around 1/2 front brake, but it'll do for now. Also shortened chain... And went for a short ride up the road, in rugby shorts, socks and slippers. Kids didn't want to go with me... And hopefully (but seems unlikely) the battery and controller will fit in these 'vintage' bags (courtesy of Ali)... Gonna be tight up front, have to fit Sturmer Archer trigger shifter and throttle yet. Wonder if I can go LH throttle (think I bought a thumb-type lever) without it being upside down... So may be able to rig some power up over the weekend. Quite excite.. 4 Quote Link to comment Share on other sites More sharing options...
Popular Post Lord Gruntfuttock Posted April 3, 2020 Author Popular Post Share Posted April 3, 2020 All cells fairly even after a charge so wrapped battery in foam... Put some plastic card over BMS as protection, foam on all sides and some layers of heat shrink... And yes, fits in the canvas bag like a good'un... Very snug but I'll take it... 10 Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted April 4, 2020 Author Share Posted April 4, 2020 Got her rollin' yesterday Started by fitting controller into the fake vintage leather bag I got from Ali. Was a tight squeeze, especially as the throttle connectors were wrong (M-M) so I just rigged some strip connectors, and I taped up the wires I didn't need (PAS sensor, headlight, brakes and cruise control)... And thumb throttle couldn't be taken apart so had to remove the 50-yr old grips without buggering them to slide it on. The left one resisted gentle heat/wd40 spray, so decision made, throttle on right... And made up a heavy gauge power cable between battery pack and controller. This was around 8-10mm sq cable with XT60 connectors each end, and still measured around an ohm resistance. Not too many options if I want to keep batt pack at rear though. Couldn't find my cable ties so just insul-taped things together for trial run. Need to punch some brass grommets into bag at rear so can cable tie to stays, it wobbles about a bit... And still have no brakes, the pads are very hard, worn down, and cables at max adjustment. Will replace pads and make new cables when I can. BUT, when I plugged everything in and turned on the controller it ran. Quick test run showed me the controller was on upside down, (not reading 62km/h) I learned the throttle locked on at full noise if you hold it on for ?? seconds, so first corner was a bit hairy, no brakes and full throttle. I could either rig up a brake switch or just learn to blip throttle to reset when approaching corners/intersections. Bloody pleased it went though, back to garage for a few tweaks before proper test run... 6 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Lord Gruntfuttock Posted April 4, 2020 Author Popular Post Share Posted April 4, 2020 So with controller flipped, I discovered I could get around 30km/h on the flat, and GPS mapping showed this was pretty accurate. I was keen to test endurance so just hooned round the block, a bloody hoot not pedalling. Still have to sort cable routes etc but effectively still in prototype stage... Was hot and I was feeling chuffed, so grabbed a stubbie... Which gave me an idea, a 4km circuit round the block, with some gentle hills, almost the perfect distance to chop a stubbie each lap, game on... So merrily hooned around, passing lycra cyclists, waving to kids and tipping my stubbie to dads working in their yards, grabbing a fresh one each lap. (daughter was taking these pics)... Then suffered a puncture the furthest I could get from home (rear is dead flat). Think I felt it happen on a fast corner I was attempting to take at full noise, knee down style... So endurance test canned, but bloody happy how it went. Exceeded my estimates, going for over an hour at full noise with very little pedalling. Although time is misleading as it doesn't account for stubbie pit-stops (7). But over 30kms is bloody brilliant. Measured voltage after walk home and was 33.3V. Think controller cuts out at 30... So still have a bit to do (brakes, gears, sort cables etc) but it met my calculated speed and distance expectations, and got a lot of smiles from people I passed (although they may have been chuckling at the happy looking Barry day-drinking on his contraption). Wife even had a go... So a bit to fettle, and I still have the bonus 48V motor I was sent in error, plus I bought a spot welder so can make up a more compact battery for the next one. 18 2 1 Quote Link to comment Share on other sites More sharing options...
Chris.QCR Posted April 4, 2020 Share Posted April 4, 2020 Thats pretty awesome mate ! Stoked for ya. Keen to see more adventures 1 Quote Link to comment Share on other sites More sharing options...
yetchh Posted April 4, 2020 Share Posted April 4, 2020 2 hours ago, Lord Gruntfuttock said: Was hot and I was feeling chuffed, so grabbed a stubbie... Class.. 1 1 Quote Link to comment Share on other sites More sharing options...
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