Search found 432 matches

by ferret
Dec 28 2017 9:52am
Forum: E-Bike Non-hub Motor Drives
Topic: Dave's 80:1 RC mid drive kit build log
Replies: 1424
Views: 216318

Re: Dave's 80:1 RC mid drive kit build log

I'm using this type of throttle: https://www.aliexpress.com/item/WUXING-108X-Right-Left-Finger-Thumb-Throttle-Ergonomic-Design-20-22mm-DIA-Handlebar-Electric-Bicycle-Scooter/32836508457.html?spm=a2g0s.9042311.0.0.s9RlY0 Mounted on the left where a front shifter would normally go. Reasonably easy to ...
by ferret
Dec 28 2017 7:42am
Forum: E-Bike Technical
Topic: Discussion: Motor voltage, timing and gearing's effects on performance and efficiency
Replies: 18
Views: 1561

Re: Higher top speed question for motor gurus

Thanks for all the responses. The reason I posted this question was to gain deeper understanding of the various methods and the differences between them, not to reach a specific top speed. Field weakening only has any penalty in efficiency while you're at the speed range that uses it. Of-course, but...
by ferret
Dec 27 2017 7:01pm
Forum: E-Bike Technical
Topic: Discussion: Motor voltage, timing and gearing's effects on performance and efficiency
Replies: 18
Views: 1561

Discussion: Motor voltage, timing and gearing's effects on performance and efficiency

Hi. Rising a vehicle's performance can be achieved using several different methods: Increasing pack voltage Changing gearing or wheel size Field weakening Advanced timing, static Advanced timing, dynamic (only at high RPM) How do these methods compare to each other in terms of efficiency, torque and...
by ferret
Dec 10 2017 3:48am
Forum: E-Bike Technical
Topic: Is this a sine wave controller?
Replies: 5
Views: 811

Re: Is this a sine wave controller?

Girder,
unless a controller is specifically advertised as "Sine Wave", you can be 99.9% certain it is not.

If you describe what controller you are looking for, members will be happy to give recommendations. It will be faster than picking a controller and asking about it.

Avner.
by ferret
Dec 06 2017 3:41am
Forum: E-Bike Technical
Topic: need a recommendation for full suspension front fork and rare
Replies: 2
Views: 492

Re: need a recommendation for full suspension front fork and rare

-CrazyBiker- wrote:
Dec 05 2017 6:27pm
for a EBB frame, so what do u think? DNM? FOX? etc...

how important Is the coil / air spring?
Generally speaking:
Coil: Heavier, less adjustable, better small bump compliance.
Air: Lighter, more adjustable, less small bump compliance.

Avner.
by ferret
Dec 04 2017 3:50am
Forum: E-Bike Non-hub Motor Drives
Topic: Pesu TTium mid drive bike cheap on kickstarter
Replies: 4
Views: 891

Re: Pesu TTium mid drive bike cheap on kickstarter

"PESU - the world’s fastest electric mountain bikes" :lol:

And of-course "TTium" has nothing to do with Titanium.

Avner.
by ferret
Nov 20 2017 4:26am
Forum: E-Bike General Discussion
Topic: eRecumbent - clearance problem with calliper
Replies: 3
Views: 490

Re: eRecumbent - clearance problem with calliper

The picture isn't very clear, but it looks like if you remove the 6 disk bolts and flip the brake disk, you will move it a few mm closer to the centerline of the bike and may gain the required clearance.

Avner.
by ferret
Oct 17 2017 3:43am
Forum: E-Bike Technical
Topic: Using bicycle's frame as heatsink for the Phaserunner
Replies: 45
Views: 5611

Re: Using bicycle's frame as heatsink for the Phaserunner

Rubber is excellent for expanding the contact area, but rubber is heat insulator... In fact, every solid which is flexible is heat insulator. The last idea I've had, is to create an intermediate&sealed volume between the body of the Phaserunner and the frame, which would be filled with some sort of...
by ferret
Oct 11 2017 12:05pm
Forum: E-Bike Technical
Topic: SRAM IGH vs Derailleur
Replies: 4
Views: 697

Re: SRAM IGH vs Derailleur

Hubert, Although they have the advantages you mentioned, IGHs didn't take off in the MTB world mainly because they are inferior to a derailleur system in these aspects: Heavier. More expansive. In most case have a narrower gear range. Incompatible with modern mountain bikes rear axle standards. From...
by ferret
Oct 11 2017 7:30am
Forum: E-Bike Technical
Topic: SRAM IGH vs Derailleur
Replies: 4
Views: 697

Re: SRAM IGH vs Derailleur

1X drivetrains is a trend that has become popular in mountain bikes in the last few years. People want to eliminate the front derailleur to reduce complexity and weight. They are not intended for the same users as IGHs.
by ferret
Oct 06 2017 5:13pm
Forum: E-Bike Non-hub Motor Drives
Topic: Astral Rune build thread
Replies: 23
Views: 3963

Re: Astral Rune build thread

As I mentioned, I already tried both frame mounted battery and backpack mounted battery and prefer the latter. Not trying to convince you or anyone, especially not knowing your riding style, I feel that a backpack is better for me for the following reasons: * More nimble handling. * Less impacts to ...
by ferret
Oct 06 2017 4:13pm
Forum: E-Bike Non-hub Motor Drives
Topic: Astral Rune build thread
Replies: 23
Views: 3963

Re: Astral Rune build thread

You are pretty much spot on with your calculations. I mostly ride singletracks so I'm not too concerned with "powered" top speed. I reach my highest speeds using gravity by letting off the brakes going downhill without touching the throttle. With the Castle controller on 12S "hot off the charger", t...
by ferret
Oct 06 2017 1:45pm
Forum: E-Bike Non-hub Motor Drives
Topic: Astral Rune build thread
Replies: 23
Views: 3963

Re: Astral Rune build thread

I did turn down part of the spindle by a few hundredth of a millimeter. The bearings I used for the freewheel adapter have the same dimensions as the BB bearings, which are pressed on the spindle. I wanted to be able to install and remove the freewheel adapter without using a puller or high temperat...
by ferret
Oct 06 2017 9:52am
Forum: E-Bike Non-hub Motor Drives
Topic: Astral Rune build thread
Replies: 23
Views: 3963

Re: Astral Rune build thread

Thanks, it took more than two year, but it's finally coming together. Slowly but surly :) The Phaserunner made using Burtie's sensor PCB really easy to install. I simply glued it at a position where the wires will be shortest and the Phaserunner automatically detected the sensor angle relative to th...
by ferret
Oct 05 2017 4:46am
Forum: E-Bike Non-hub Motor Drives
Topic: Astral Rune build thread
Replies: 23
Views: 3963

Re: Astral Rune build thread

A few updates over the last year: IMG_20171005_120936_HDR.jpg IMG_20171005_120945_HDR.jpg IMG_20170423_222026.jpg IMG_20171005_120850_HDR.jpg IMG_20170506_130122.jpg IMG_20170506_130136.jpg Switching to sensored motor and controller made a huge difference when riding slow technical terrain. Avner.
by ferret
Oct 02 2017 1:22am
Forum: E-Bike General Discussion
Topic: Powerful Hub Motor with Front Derailleur Only
Replies: 30
Views: 2617

Re: Powerful Hub Motor with Front Derailleur Only

Incidentally, I don't want a rear derailleur because they are difficult to clean, need constant adjustment and are prone to damage. As I wrote earlier, even if you only have gears at the front, you will still need a rear derailleur or a similar mechanism to take up the slack in the chain when you s...
by ferret
Oct 01 2017 9:00am
Forum: E-Bike General Discussion
Topic: Powerful Hub Motor with Front Derailleur Only
Replies: 30
Views: 2617

Re: Powerful Hub Motor with Front Derailleur Only

I'm ignoring the bottom bracket drives as these seem to require a departure from normal bicycling. (i.e. back pedaling to shift gear, motor brakes and perhaps other oddities). Hi. Mid drives does not require departure from normal bicycling. For front gears only you will still need a rear derailleur...
by ferret
Sep 18 2017 10:44am
Forum: E-Bike Technical
Topic: How to build a single pivot around the bottom bracket
Replies: 9
Views: 1166

Re: How to build a single pivot around the bottom bracket

If you mean the width of the BB shell, how far are the left and right clamps from each other, then yes.

Avner.
by ferret
Sep 18 2017 8:54am
Forum: E-Bike Technical
Topic: How to build a single pivot around the bottom bracket
Replies: 9
Views: 1166

Re: How to build a single pivot around the bottom bracket

Here's a pictures of a Cove G-Spot FR frame with BB concentric pivot: The swing arm is split and clamps around the bearings. https://ep1.pinkbike.org/p4pb6208093/p4pb6208093.jpg Other frames have this feature as well: https://www.google.com/search?rlz=1C1VFKB_enIL637IL637&biw=1280&bih=617&tbm=isch&s...
by ferret
Sep 14 2017 9:14am
Forum: E-Bike General Discussion
Topic: HOMEMADE TIRE SEALANTS...
Replies: 5
Views: 1538

Re: HOMEMADE TIRE SEALANTS...

Most homebrew (and commercial) sealant recipes I came across are Latex based. You'll fined a lot of info if you search mountain bike forums and sites for DIY/homebrew tire/tubeless sealant. https://www.google.com/search?q=homebrew+tubeless+sealant&rlz=1C1VFKB_enIL637IL637&oq=home+breaw+tubeless&aqs=...
by ferret
Aug 29 2017 10:48am
Forum: E-Bike Build Threads / Photos & Video
Topic: Your Creation's Before & After Pics
Replies: 1882
Views: 667317

Re: Your Creation's Before & After Pics

neil.b,
I believe that, for off road riding, a backpack battery is better than a frame mounted one. On my first build I switched from a battery box to a backpack and I went for a backpack from the get go with my second build.

Avner.
by ferret
Aug 28 2017 4:23am
Forum: E-Bike General Discussion
Topic: Is Stealth B-52 Bomber worth the $11,000 sticker price?
Replies: 102
Views: 18116

Re: Is Stealth B-52 Bomber worth the $11,000 sticker price?

As mentioned earlier in the thread, check out LMX:
http://www.lmxbikes.com/en/12-full-lmx-bike
Seems to offer a better bike for less money without going the DIY/custom build route.

Avner.
by ferret
Aug 24 2017 11:57am
Forum: E-Bike Technical
Topic: Phase Runner Fault Tolerant Hall
Replies: 3
Views: 608

Re: Phase Runner Fault Tolerant Hall

UPATE, ISSUE RESOLVED:

After consulting with Justin the problem was fixed by flashing the xml file he uploaded here:
https://endless-sphere.com/forums/viewt ... e#p1310696

Avner.