Search found 460 matches

by SafeDiscDancing
Mar 04 2022 4:36pm
Forum: EBike Build Threads
Topic: Hill Climbing eBike
Replies: 182
Views: 6363

Re: Hill Climbing eBike

Jesus the Father.jpg I pray to the Father... Jesus Christ.... Jesus the Son.jpg ...that this crazy hack to stiffen up the Motor Mount will never surrender !!! So yeah, it kind of looks like a cross but it seems strong enough for the job. I'm calling it a win and moving on. It still ended up very li...
by SafeDiscDancing
Mar 04 2022 10:14am
Forum: EScooter/EMotorcycle Build Threads
Topic: New build
Replies: 22
Views: 2081

Re: New build

Chosen1Technology wrote:
Mar 04 2022 6:22am
Any new updates??
Funny how if it's a fast bike and we don't hear anything we wonder....
by SafeDiscDancing
Mar 04 2022 10:03am
Forum: Battery Technology
Topic: Cells in parallel vs whole packs
Replies: 8
Views: 388

Re: Cells in parallel vs whole packs

POUCH In one word you solve all the problems relating to parallel. Use pouch cells as big in amp hour as your design requires and just do a simple series string of them. But then you devote your time to pouch compression and making sure those tabs are tightly connected... so it's always a tradeoiff...
by SafeDiscDancing
Mar 03 2022 10:17pm
Forum: Battery Technology
Topic: Cells in parallel vs whole packs
Replies: 8
Views: 388

Re: Cells in parallel vs whole packs

Ultimately all packs are defined by the weakest cell. So if you have two series strings which you then combine as parallel "afterwards" then the weakest cell will exist "somewhere" in one of those two series strings. Let's take an example: Series One: 10.1 ah 10.2 ah 10.3 ah Seri...
by SafeDiscDancing
Mar 03 2022 7:06pm
Forum: EBike Build Threads
Topic: Hill Climbing eBike
Replies: 182
Views: 6363

Re: Hill Climbing eBike

Added Mount to Clamp Base.jpg So this took all day... Added Mount to Clamp Installed.jpg Enough for today. After installing it and using heavy force with my hands I was able to bend this mounting... so this is either a "fail" or a "redesign". I'm going to have to return to this ...
by SafeDiscDancing
Mar 03 2022 12:28pm
Forum: EBike Technical
Topic: Aluminium v Steel hybrid Bike
Replies: 7
Views: 257

Re: Aluminium v Steel hybrid Bike

The rating for battery is 48v. 14.5 amp hr. Am I asking too much to try and achieve a range of 110 Kms?? So 50v * 15ah = 750wh roughly. Assuming 100km then that's 7.5 watts per km. My "guess" is no... you will more than likely output double that if not more. Instead let's assume 25 wh per...
by SafeDiscDancing
Mar 03 2022 10:50am
Forum: EBike Technical
Topic: Aluminium v Steel hybrid Bike
Replies: 7
Views: 257

Re: Aluminium v Steel hybrid Bike

I build my ebikes out of mild steel and have my own welder.

From a DIY perspective steel is easiest.

But if you only plan to use an existing frame I think Aluminum is fine.

My most recent project uses an Aluminum frame because I broke the old Aluminum swingarm.
by SafeDiscDancing
Mar 03 2022 10:41am
Forum: EBike Build Threads
Topic: Hill Climbing eBike
Replies: 182
Views: 6363

Re: Hill Climbing eBike

I'm reminded of this long-tail thread The typical distance from bottom bracket to rear wheel axle is about 15". My swing arm is 30". So what the "double rear end" does is the same wheelbase, but mine pivots forward more. The wheelbase on this bike is 55". https://endless-sp...
by SafeDiscDancing
Mar 03 2022 10:35am
Forum: General Discussion
Topic: Invention idea
Replies: 56
Views: 7442

Re: Smell A Phone

Today's invention is for people who enjoy polluting air with massive amounts of horrific perfume smells. Some cultures use smell as a form of chemical warfare. Yeah, I agree... heavy overpowering perfume can give me a headache. And I find that 95% of women will select the most unpleasant perfume be...
by SafeDiscDancing
Mar 02 2022 6:08pm
Forum: EBike Build Threads
Topic: Hill Climbing eBike
Replies: 182
Views: 6363

Re: Hill Climbing eBike

Motor Disassembled.jpg There are potentially seven bearings but you can do just two rather than four inside the motor if you use a spacer. Motor Assembled.jpg Outside view. That thick steel bar sticking out will get welded to the swingarm clamp probably tomorrow. I'm going for a minimalistic look i...
by SafeDiscDancing
Mar 02 2022 11:59am
Forum: EBike Build Threads
Topic: Hill Climbing eBike
Replies: 182
Views: 6363

Re: Hill Climbing eBike

Bottom Bracket Mounting Ideas.jpg So I was thinking of using some of my square tubing to attach the Bottom Bracket but instead of that I'm thinking of switching to some scrap metal that comes already shaped as a circle. This will allow me to do the big welding first and worry about perfect alignmen...
by SafeDiscDancing
Mar 02 2022 1:12am
Forum: EBike Technical
Topic: Burned up my first motor
Replies: 20
Views: 495

Re: Burned up my first motor

Are there any videos on how to grind #35 ? https://cart.electricscooterparts.com/80-tooth-sprocket-for-40-41-and-420-chain-with-g1-mounting-pattern 80 Tooth Sprocket for #40, #41, and #420 Chain Made from Aircraft-Grade Tempered (Hardened) Aluminum Alloy For #40, #41, and #420 Chain 80 Teeth G1 Mou...
by SafeDiscDancing
Mar 02 2022 12:34am
Forum: EBike Technical
Topic: Burned up my first motor
Replies: 20
Views: 495

Re: Burned up my first motor

Put a 70T in place of the 53T and you get a 24mph. 14T-98T in #219 would give the same 24mph. Actually if the 70T would fit on his bike yeah... great idea. Do they sell them that big? What outside diameter would that be? My guess is it will be bigger than 10" because that's what a 100t #219 tu...
by SafeDiscDancing
Mar 02 2022 12:22am
Forum: EBike Technical
Topic: Burned up my first motor
Replies: 20
Views: 495

Re: Burned up my first motor

https://cart.electricscooterparts.com/10-tooth-sprocket-with-10mm-x-8-5mm-double-d-bore-for-35-chain https://cart.electricscooterparts.com/resize/photos/SPR-3510.jpg?bw=575&w=575 Basically you cannot go lower than about 10 teeth on ANY chain without having serious troubles. Having a shorter pitc...
by SafeDiscDancing
Mar 01 2022 11:47pm
Forum: EBike Technical
Topic: Burned up my first motor
Replies: 20
Views: 495

Re: Burned up my first motor

I’ve got a double D output shaft, so I’m much more limited on front options https://thebigbearingstore.com/12-tooth-sprocket-for-35-roller-chain/ https://cdn10.bigcommerce.com/s-emvqxmmb/products/2560/images/9461/bsprocket__87368.1421684086.1280.1280__10429.1421684393.1280.1280__67030.1421948852.26...
by SafeDiscDancing
Mar 01 2022 8:04pm
Forum: General Discussion
Topic: Is the American Banking System Under Cyber Attack?
Replies: 3
Views: 398

Re: Is the American Banking System Under Cyber Attack?

Sounds like Albania. In "Wag the Dog" it's always Albania. But you never know... it also could be Space Aliens from Uranus. Or something localized. Actually my router seemed a bit "off" today so I restarted it so maybe there is some type of low level attack on routers and other t...
by SafeDiscDancing
Mar 01 2022 7:45pm
Forum: EScooter/EMotorcycle Build Threads
Topic: First time builder looking for help
Replies: 12
Views: 620

Re: First time builder looking for help

https://cdn.shopify.com/s/files/1/2398/3077/products/imageedit_171_6303187192_91fa2496-b8d6-4d19-807a-e20e8f20ea39_740x.png?v=1644861402 https://batteryhookup.com/products/samsung-ev-lithium-ion-12s-44-4v-47ah-2-07kwh-module-used Samsung EV Lithium Ion 12s 44.4v 47ah 2.07kWh USED $96/kWh $200 Compl...
by SafeDiscDancing
Mar 01 2022 4:40pm
Forum: EBike Technical
Topic: Burned up my first motor
Replies: 20
Views: 495

Re: Burned up my first motor

I get away with an 11t to 100t... the 100 tooth sprockets are rare. 14t to 98t gets you 7 to 1 reduction. One thing... anything below 12t and you need a roller AFTER the power runs past the front sprocket to keep the chain wrapped tightly. Smaller sprockets will skip if you don't add a roller. More ...
by SafeDiscDancing
Mar 01 2022 10:28am
Forum: EBike General Discussion
Topic: Want suggestions for cargobike with large mid-mount motor
Replies: 136
Views: 4061

Re: Want suggestions for cargobike with large mid-mount motor

simonov wrote:
Feb 28 2022 1:21pm
I'm thinking about starting with a KMX.
viewtopic.php?t=51873&start=100

Image

Fat Tires.

Just add side pods and you are a cargo bike.
by SafeDiscDancing
Mar 01 2022 10:03am
Forum: EBike Technical
Topic: Burned up my first motor
Replies: 20
Views: 495

Re: Burned up my first motor

#219 Go Kart Chains :bigthumb: Very small pitch to allow high gear reduction ratios and very strong because they use them on 15 horsepower go karts. You can buy the rear sprockets on eBay for $20. It's the front sprocket that is more difficult... usually involving some adapting. You can buy #35 size...
by SafeDiscDancing
Feb 28 2022 10:28pm
Forum: EBike Technical
Topic: Burned up my first motor
Replies: 20
Views: 495

Re: Burned up my first motor

72 volts to get to 4900 rpm means a kV of 68. So at 10 volts you spin at 680 rpm. 10 tooth to 53 tooth means 5.3 reduction. Then 10 volts translates to 128 rpm at the rear wheel. By the time you reach about 40 volts your speed would be something like 30 mph I would guess. The bottom line... and what...
by SafeDiscDancing
Feb 28 2022 5:26pm
Forum: EBike Build Threads
Topic: Hill Climbing eBike
Replies: 182
Views: 6363

Re: Hill Climbing eBike

Bike Stand Mostly Done.jpg Another tedious day because on this Bike Stand I needed to get a very specific narrowing set of tubes then go through all the difficulties of getting it aligned. I think it's good. A little sticky on getting the bike off the stand but with some sandpaper or the grinder or...
by SafeDiscDancing
Feb 28 2022 10:16am
Forum: EBike General Discussion
Topic: Want suggestions for cargobike with large mid-mount motor
Replies: 136
Views: 4061

Re: Want suggestions for cargobike with large mid-mount motor

Image

Okay... so recumbent, trike, cargo, solar and can swim in the water too. :lol:

Combine everything into one vehicle.
by SafeDiscDancing
Feb 27 2022 11:55pm
Forum: EBike Build Threads
Topic: Hill Climbing eBike
Replies: 182
Views: 6363

Re: Hill Climbing eBike

Frame lightweight and incredibly stiff in all important dimensions. Real thing of beauty. Someone earlier in this build thread asked "Why did you choose square tubes and not round ones since round is by weight stronger?" And the answer is square is easy to cut and easy to weld. I took mos...
by SafeDiscDancing
Feb 27 2022 9:27pm
Forum: EBike General Discussion
Topic: Want suggestions for cargobike with large mid-mount motor
Replies: 136
Views: 4061

Re: Want suggestions for cargobike with large mid-mount motor

Has anyone done something like this? Basically a recumbent trike with side pods for cargo. I'd love to hear more about this idea, perhaps in another thread. I'm mulling a plan to build one or two off-road fat tadpoles for overnight camping in places accessible via jeep trail or fire road. Not stric...