Search found 110 matches

by DrInnovation
Jun 07 2016 10:09am
Forum: E-Bike General Discussion
Topic: Build with Crystalyte 4012/409 +Headway + HomeBrewMounting
Replies: 12
Views: 1981

Re: Build Questions with Crystalyte 4012/409

Well I think I've found an answer my own first question from above.. that insert is a type of derailed hanger.. which is apparently often made of even software metal than the AL in the frame http://www.bikehugger.com/post/view/replaceable-derailleur-hanger so probably not good for a hub motor. But t...
by DrInnovation
Jun 06 2016 4:13pm
Forum: E-Bike General Discussion
Topic: Build with Crystalyte 4012/409 +Headway + HomeBrewMounting
Replies: 12
Views: 1981

Re: Build Questions.. headway in triangle?

Working on my bike upgrade. Got a old huffy blades bike (steel frame) that I'll use the base. I also have a much nicer diamondback MTB, but it has al frame. However the rear fork has an odd inset, Its not magnetic but then neither is titanium? does not make so have a special inset of al in an al fra...
by DrInnovation
Jun 02 2016 10:30am
Forum: E-Bike Non-hub Motor Drives
Topic: Lashout/Rayous Ques. on Washers and Sprockets->Currie/Zip?
Replies: 6
Views: 571

Re: Lashout/Rayous Ques. on Washers and Sprockets->Currie/Zi

Well the washers did not really solve the problem... the gear just popped out the back side (where there is nothing stopping other than the C-ring clip which it just popped off. But decided not to pursue the side-mount approach. Parts were not easy to find unless I used the planetary gear that is wh...
by DrInnovation
Jun 01 2016 12:20pm
Forum: E-Bike General Discussion
Topic: Build with Crystalyte 4012/409 +Headway + HomeBrewMounting
Replies: 12
Views: 1981

Build with Crystalyte 4012/409 +Headway + HomeBrewMounting

Just got an older used Crystalyte 4012/409 dual speed rear hub and as this is my first hub-based build I have some questions. First some expected background: I'm 5'9", 30" inseam and 200lb and generally carry 25lb backpack with computer and stuff. My primary goal is my daily commute which is 1.6 mil...
by DrInnovation
May 29 2016 8:51am
Forum: Battery Technology
Topic: LiPo Repack question.. restructure or adding extra cells?
Replies: 16
Views: 913

Re: LiPo Repack question.. restructure or adding extra cells

Its been about a year since i posted here and got some useful feedback. Just did another full checkup and I figured its time for an update incase anyone has similar issues and wonders what was the outcome. I took ykick's advice and decided to just watch it -- saving me from a lot of work rebuilding ...
by DrInnovation
May 16 2016 10:03pm
Forum: E-Bike General Discussion
Topic: Sunkist? is this a usable bike?
Replies: 3
Views: 423

Sunkist? is this a usable bike?

Anyone have comments about this type of bike
Image

Seems like a odd design.. (maybe some weird worm gear drive?

http://denver.craigslist.org/bik/5587511716.html
by DrInnovation
May 16 2016 3:35pm
Forum: E-Bike General Discussion
Topic: Do potholes eat gears?
Replies: 3
Views: 339

Re: Do potholes eat gears?

A DD hub "should" eliminate any shock-loading issues on gears. The extra weight of a DD hub would focus pot-hole stress on the spokes with occasional spoke-breakages. You can upgrade to a rear suspension and a fatter rear tire to somewhat alleviate that. (a 24-inch rim with a 2.5-inch tire is rough...
by DrInnovation
May 16 2016 11:22am
Forum: E-Bike General Discussion
Topic: Do potholes eat gears?
Replies: 3
Views: 339

Do potholes eat gears?

I'm looking at upgrading from my LashOut (disk-brake chain side mount with Mac with currie planetary gear connection).. because I eat a planetary gear avery 1-3 months. As I am looking at a replacement, started thinking about what causes it. My hills (10%) and mass (200+backpack+bike=300) don't help...
by DrInnovation
May 15 2016 10:47pm
Forum: E-Bike Reviews & Testing
Topic: 2011 Currie iZip Ultra Review
Replies: 10
Views: 2355

Re: 2011 Currie iZip Ultra Review

Thanks.. great info. The bike is $800.. It is new and if they kept it in a cool place or at 50% charge I would expect the 18650's to be nearly unimpacted. Samsung cells age well if cared for. I've asked about where/how it was stored, so we'll see. They are offering the original warranty. I'm 200 so ...
by DrInnovation
May 15 2016 3:48pm
Forum: E-Bike Reviews & Testing
Topic: 2011 Currie iZip Ultra Review
Replies: 10
Views: 2355

Re: 2011 Currie iZip Ultra Review

Nice review.. I have an opportunity to get a "new old stock" (so supposedly good battery) Izip ultra.. and so I'm curious if after a year you still recommend it. I have a 10% grade for .25 miles on my way to work… so while other reviews questioned its hill climbing you seemed to like it. I'll absolu...
by DrInnovation
May 12 2016 7:19am
Forum: E-Bike General Discussion
Topic: what is in this bike (an elecTrek)? Voltage for hubs?
Replies: 2
Views: 157

Re: what is in this bike (an elecTrek)? Voltage for hubs?

The "48v" hubs will need at least 12s battery. the low voltage cutoff will be too high for any less. Some bikes/kits can run 36 or 48v. they can run on 10 s minimum. The trek is likely to be a very old school system. Likely 24v. it should be a worm drive type mid drive, notoriously loud. I gave awa...
by DrInnovation
May 11 2016 9:17pm
Forum: E-Bike General Discussion
Topic: what is in this bike (an elecTrek)? Voltage for hubs?
Replies: 2
Views: 157

what is in this bike (an elecTrek)? Voltage for hubs?

Looking to replace my Lashout (it runs fine but I keep having to replace the planetary gear .. guess its my 200+ pounds and 10% grades.. (I'll fix it up and sell it for lighter people or flatlanders..) Looking for an inexpensive but reliable replacement. Can anyone identify this bike http://images.c...
by DrInnovation
Apr 24 2016 8:46am
Forum: E-Bike Non-hub Motor Drives
Topic: Lashout/Rayous Ques. on Washers and Sprockets->Currie/Zip?
Replies: 6
Views: 571

Re: Lashout/Rayous Ques. on Washers and Sprockets->Currie/Zi

well, I did not (yet) modify the sprockets. I'm not sure I could fit an 80.. the gears would be almost touching (I did not measure it precise enough). But before ordering I decided to test the thrust washer issue. I ended up going to lowes and getting some nylon washers and then drilling them out to...
by DrInnovation
Mar 26 2016 5:42pm
Forum: E-Bike Non-hub Motor Drives
Topic: Help needed: Converting Lashout/Rayos to Left-hand mid drive
Replies: 1
Views: 221

Re: Help needed: Converting Lashout/Rayos to Left-hand mid d

Following up on my own post. No I now I'm not sure I can do any of these (definitely not #1 or #2), as I did the math for the ratio'sI cannot get it to work out because the lashout 7speed has a larger sprocket on the crank (42) than any of the rear sprockets (largest is 27), so the end-to-end ratio ...
by DrInnovation
Mar 23 2016 9:14pm
Forum: E-Bike Non-hub Motor Drives
Topic: Help needed: Converting Lashout/Rayos to Left-hand mid drive
Replies: 1
Views: 221

Help needed: Converting Lashout/Rayos to Left-hand mid drive

I've decided I'm tired of trying to keep the Lashout Planetary gear from being destroyed. I'm guessing its the torque from my hills, maybe combined with all all the bumps/potholes (I do ride it off road and over lots of stuff). So my idea (based on lots of reading here) is to reduce torque convert i...
by DrInnovation
Mar 22 2016 2:43pm
Forum: E-Bike Non-hub Motor Drives
Topic: Lashout/Rayous Ques. on Washers and Sprockets->Currie/Zip?
Replies: 6
Views: 571

RE:Lashout//Rayous Ques. on Washers and Sprockets->Currie/Zi

On the gearset, how well greased was it initially, and how well sealed is the housing to keep the grease in and grit out? Well greased.. each time I replace the plenary I remove all the old grease (as it has lots of metal shards) and replace with new white grease. The housing on the plenary/motor s...
by DrInnovation
Mar 22 2016 2:16pm
Forum: E-Bike Non-hub Motor Drives
Topic: Lashout/Rayous Ques. on Washers and Sprockets->Currie/Zip?
Replies: 6
Views: 571

Lashout/Rayous Ques. on Washers and Sprockets->Currie/Zip?

I've been riding a Lashout for a while now and I've replaced the planetary gear 4 times. The last time it only lasted about 1 month. The internal bearing seems to wobble and eat the gearing to the bearing quickly. (The plenary gears themselves are fine, it the connect the the bearing shaft that is e...
by DrInnovation
Mar 22 2016 12:30pm
Forum: E-Bike General Discussion
Topic: Do you use a helmet mirror?
Replies: 21
Views: 1572

Re: Do you use a helmet mirror?

I've tried both helmet and handelbar.. and much prefer the Helmet mirror. I have something like http://www.ebay.com/itm/Bike-Bicycle-Helmet-Mount-Handlebar-Rear-View-Vision-Mirror-Safty-Black-/181948012767?hash=item2a5cf258df:g:eDcAAOSwp5JWXYq2 The handle bar ones provide an okay view but are harder...
by DrInnovation
Oct 27 2015 11:14am
Forum: E-Bike Non-hub Motor Drives
Topic: Bearings in a "Currie" 75mm planetary?
Replies: 2
Views: 530

Re: Bearings in a "Currie" 75mm planetary?

Curious how you rebuild turned out. I just destroyed my second of these in slightly over a year. This time the gear teeth that attach to the chain sprocket ate through the gears in the planitary. IMG_20151026_185349.jpg Last time the rivets poped and it destroyed the alignment elements https://endle...
by DrInnovation
Jul 22 2015 9:37pm
Forum: Battery Technology
Topic: LiPo Repack question.. restructure or adding extra cells?
Replies: 16
Views: 913

Re: LiPo Repack question.. restructure or adding extra cells

Dunum and yKiick. Thanks.. these are lipo soft packs that are spot-welded or soldered at the aluminum tabs, so a pain to disassamble/reassemble compared to 18650s and increases damage to the cells from heating with soldering iron when reassembling. For now I think I'll wait and watch. After 10 miles...
by DrInnovation
Jul 22 2015 1:47pm
Forum: Battery Technology
Topic: LiPo Repack question.. restructure or adding extra cells?
Replies: 16
Views: 913

Re: LiPo Repack question.. restructure or adding extra cells

Did a static DC Internal Resistance computation (i.e. ignoring frequence issues) which is easy enough I can keep doing it once a week if has enough diagnostic value. With no charger group 7=3.995v and with charger providing 7.7Amps group 7 = 4.098v so .103/7.7 = 13.4milliohms. For each of the 7 grou...
by DrInnovation
Jul 21 2015 10:19pm
Forum: Battery Technology
Topic: LiPo Repack question.. restructure or adding extra cells?
Replies: 16
Views: 913

Re: LiPo Repack question.. restructure or adding extra cells

I tried to measure while riding but my multi meter maxes out at 20A.. at hit that starting out on the flats. you should be able to see it when you charge. Not sure what you mean by "see it" are you saying to measure the charging current, which I guess I can and use it to estimate the pack IR. I woul...
by DrInnovation
Jul 21 2015 7:29pm
Forum: Battery Technology
Topic: LiPo Repack question.. restructure or adding extra cells?
Replies: 16
Views: 913

Re: LiPo Repack question.. restructure or adding extra cells

I've seen worse than 200mV difference under load but its certainly worth keeping a close nose/eye on. Have you tried doing IR calculations from the celllog data correlating to loaded Amps? Sometimes, I make a mental note of max battery Amps while doing a short log. Later on, do the math of cell vol...
by DrInnovation
Jul 21 2015 6:37pm
Forum: Battery Technology
Topic: LiPo Repack question.. restructure or adding extra cells?
Replies: 16
Views: 913

Re: LiPo Repack question.. restructure or adding extra cells

i assume you have a lipo signalab BMS. in almost all lipo BMS, the charging shuts off when you exceed the 4.25V threshold for HVC. Yes lipo signalab BMS.. the charging mosfet will not turn back on until the voltage has dropped down to 4.05-4.08V. Do you mean the cell voltage has to drop to 4.05 or ...