PWD's Rocky Mountain Element - refresh

Show off your E-bike creation here.
User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

PWD's Rocky Mountain Element - refresh

Post by pwd » Jan 18 2019 11:50am

I figured it was time to start a build log for science project on wheels. :bolt: Here is my current configuration:

2008 Rocky Mountain Element 10
Front: Magic Pie 4 with stock controller running at 25 amps peak
Rear: Leafbike 205 35 "1500W" with a West Coast Electric Cycles 18 MOSFET AOT290L Controller running at 80 amps peak

Two eme3v batteries in parallel:
14S5P Samsung 30Q
14S6P Samsung 25R

Here is my list of things to do:
  • clean up wiring
  • paint touch ups on extra parts
  • shunt mod to rear controller for stronger regen
  • add 12V step down
  • LED strip + bar end turn signals
  • LED strip brake light
  • new headlamp switches
  • temperature meter for rear motor
  • Statorade for rear motor
  • Hubsinks (depends if I actually need them)
  • rear fender

With old controller:
IMG_20180802_110059 (1).jpg
flir_20180705T125853.jpg
flir_20180705T125853.jpg (381.32 KiB) Viewed 1631 times
flir_20180705T125904.jpg
flir_20180705T125904.jpg (396.1 KiB) Viewed 1631 times
I moved the bike inside where it is warm so that I can putter with it to my hearts desire over the winter. I've started stripping it down to clean it up and see what needs attention:
IMG_20190105_192213.jpg
IMG_20190105_192239.jpg
IMG_20190112_154234.jpg
IMG_20190112_171433.jpg
Last edited by pwd on Jan 23 2019 8:17pm, edited 1 time in total.
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Jan 20 2019 8:32pm

I finally managed to open up my XM-L T6 lights with the blown driver:
IMG_20190120_101317.jpg
IMG_20190120_104930.jpg
IMG_20190120_104954.jpg
I didn't realize the back would thread off like the front; so I get it with a hammer and a screwdriver. I then noticed the back began to spin. Note: this light was only designed to work with a 2S battery pack.

For comparison I opened up my working 4-84V version of this light to see what the number on the board was:
IMG_20190120_115722.jpg
Does anyone know where I can find a replacement high voltage driver like the one above? I'd like to convert the first light to work on my pack voltage but I can't find any similar driver boards. The only thing that came up when I punched in the board number was this guy also looking for a replacement driver:
http://budgetlightforum.com/node/59867

I was quite happy I manged to get the damn thing open; but without a replacement driver; I'm not much further ahead.
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Jan 23 2019 8:22pm

I received some more gadgets from China over the last week:

12V Temp display that runs off of an NTC 10k thermistor. I'm loving the green. I also have a blue one on the way...:
IMG_20190123_174124.jpg
The switch arrieved damaged but I'm working out a refund of sorts from the seller. Luckily for me; the switch components can be found on ebay so I don't have to buy a whole new unit.
IMG_20190122_172955 (1).jpg
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Feb 03 2019 6:33pm

I've striped the bike back even more now since I'm basically redoing all of my hasty wiring jobs. My goal is to clean up the cables and reduce clutter by trimming out extra lengths of cable that I don't need. On my 2wd setup; that are a lot of cables. Here is one example:

My Magic Pie harness can be chopped up to remove that junction box and the excess length since I only use the front brake and throttle inputs
IMG_20190203_121418.jpg
I received my new Chinese handlebar stem so that I can fit my BMX bars back on the bike. I like having the brace since it allows for my clamping points. This will be especially handy to center my Cycle Analyst and run two headlamps. I've also drilled a hole in the bars to run some bar end turn signals; I feel better about doing it on these reinforced steel bars than the aluminum ones I was using before.
IMG_20190203_121357.jpg
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
motomech   1 GW

1 GW
Posts: 3287
Joined: Sep 11 2010 12:21am
Location: Punta Cana Baja Mexico

Re: PWD's Rocky Mountain Element - refresh

Post by motomech » Feb 03 2019 8:32pm

Wow, that thing must weight a ton. Over the course of the 8 years I've been riding my Rocky Mountain Edge, I kept adding stuff until it was over 75 lb.s! That is w/ a mini frt geared motor, an Ezee geared rear and 25 Ah's of LiPoly. I trimmed the batt. packs back to a total of 14 Ah's and now it feels like a bicycle again.
The bike itself has been awesome, the only non-drivetrain maintenance items have been the Fox shock and the linkage pivot points. The shock received a seal kit once and at that time I added a Fox tuning kit to better deal w/ the extra weight of the Edrive related stuff and rider :roll: and inspected the linkage bearings once. As I don't ride in the wet, they were fine. Every couple of years, I would start to get some squeaks, at which point I simply lay the bike on it's side(s) and let some penetrating oil work it's way in overnite. I also add a few CC's of shock oil every year or so.
Speaking of the shock, are you not concerned about having the shock mounted backwards? I think what little oil that's in there rests where the seals are and w/ the way you have it mounted now, the oil would sit at the opposite end of the chamber. Maybe it's NBD.
Motomech

'03 Rocky Mountain Edge 2WD 260 Q100H frt and Ezee V1 rear 2 Elifebike 20A & 25A 9-FET controllers 12S/10Ah Multistar Lipo rear 4Ah Turnigy frt Luna Cyclops Extra lite Alex 24DM rims, Crazy Bobs run ghetto tubeless. 25 mph. Mean Well HLG-320H-54A
https://endless-sphere.com/forums/viewt ... =3&t=83430
'07 GT Idive 4 4.0, Q100C 201 14S LiPoly elifebike 9-FET 20A controller. 23 MPH.
https://endless-sphere.com/forums/viewt ... 4#p1378484

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Feb 04 2019 11:32am

Yep, the bike is heavy; I'm guessing its around 85-90lbs fully loaded. I'm adding even more stuff to the bike as you can see in my to-do list; but I'm trying to do it with some better planned cable management. This Element has been great so far. It's been handling my short but aggressive commute well.

I purposely reversed the rear shock so that I could fit the battery with ease. I did not realize/consider that the oil would be at the opposite end now; I will have to look into that. Thanks for noting that.
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Feb 05 2019 2:13pm

I've been playing with some schematics for my lighting plans while I wait for the Chinese new year to be over... This is all in theory and not tested yet:
Screenshot_20190205_141042.png
Screenshot_20190205_141042.png (35.13 KiB) Viewed 1402 times
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Feb 12 2019 9:59am

I managed to get some soldering done with my new Weller 25W iron. I broke my other one by snapping the tip off in the heating module...

I added some jst-xm connectors to the cables and turn signals
IMG_20190210_113205.jpg
bar end signals
the flasher relay I bought was bigger than I expected but fortunately I was able to remove the outer case and solder some pigtails directly to the board
IMG_20190207_202612.jpg
flasher relay
testing out my LED strip for rear turn signals ( I hope they will be bright enough)
IMG_20190207_202632.jpg
led strip
I also added a connector to the cycle analyst so that I can disconnect it from my main power cables if necessary. I was also able to chop the excess cable that I had coiled up an zip tied to the frame. I re-used an 8 pin connector from my old Magic Pie 2; and it worked out nicely.
IMG_20190210_113108.jpg
cycle analyst
Check out all of the cables I managed to trim out of my setup, it should help with the look of the bike
IMG_20190210_120119.jpg
chopped wires
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Feb 15 2019 10:38am

I have been working on my rear seat-post rack lately. My plan is to add LED strips around it for a brake light and turn signals. The rack was cracked in a couple spots and bent from a couple wipe outs and other mishaps. I've had it repaired and added an extra solid rod of aluminum to it for strength and to have more surface area for the LED strips:
IMG_20190215_101800.jpg
rack1
IMG_20190215_101750.jpg
rack2
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Mar 03 2019 1:33pm

I spent a few hours working on the bike this weekend:
Preview from the front to see how the new panel looks
IMG_20190302_152748.jpg
Front preview
new sub-dash panel for temperature gauge and future switches. I am thinking of adding multiple temperature probes and a switch to toggle the display between probes to display motor/controller temp.
IMG_20190302_152731.jpg
rear rack is complete with working LEd strips for turn signals and brake light
IMG_20190302_100428.jpg
IMG_20190302_100246.jpg
I did the shunt mod on my controller because I wanted more regen strength. This controller was only doing about 7 amps of regen at full strength and my old one could hit 10 and felt much stronger. I've also turned down the battery current to compensate for the shunt mod; although I will have to dial it in when it is working on the bike.
IMG_20190302_092226.jpg
IMG_20190302_092130.jpg
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Apr 06 2019 5:34pm

I got the temperature sensor swapped out for a 10K NTC so that it works with the eBay temperature meter. I have a problem though, the meter doesn't display the temperature, I just get an "hhh" on the meter. I tested the thermistor with a multimeter and it is showing the correct resistance (around 12K ohms for 21 celcius).

The thermistor shares the ground wire from the motor's hall sensor ground and also has a white wire. If I power the temperature meter from a 9V battery, it displays the temperature no problem. When I power the meter from a dc to dc converter using the main battery pack; the meter shows "hhh". If I unplug the controller's power; the meter displays correctly.

I see this has something to do with the meter having a shared wire between power ground and one of the sensor wires but I don't know how I can get around that. Any ideas? :?:
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Apr 08 2019 3:18pm

Here are some updates on my build with photos:

I trimmed a bit of weight (300 grams) from the rear rack by replacing 90% of the square tube with aluminum. I Made a kind of receiver to fit the seatpost clamp (steel) into the aluminum square tube. I then put a bolt and some jb weld on it and called it a day.
IMG_20190317_175756.jpg
bike rack weld
IMG_20190317_175832.jpg
rear view
I attempted to recycle a rear fender from a 700c cruiser bike that was left for trash. I relocated a couple of the mounting holes, acquired some rubberized clamps (surprisingly hard to find around here) and it seems to fit OK. With my frame having piviot pints; my mounting points are limited but I was able to mount it across the same section of frame. It is still waiting on a road test to see if it will survive the vibrations and potholes....
IMG_20190319_204012.jpg
fender side
IMG_20190319_204024.jpg
fender back
My order of Statorade arrived last week and I finally removed the rear wheel and cracked open the motor side cover. I also replaced the motor's temp sensor with a more standard 10K NTC thermistor so it works with cheap ebay temp meters which I have already blown (see above post).
IMG_20190405_183630.jpg
open hub motor
IMG_20190405_192211.jpg
sealed hub motor
while I was at it; I headed to my LBS to purchase some headset spacers. I also cleaned and regreased the headset bearings etc.. I noticed that my bike was missing the lower bearing dust cover and was allowing all sorts of sand and grit to enter. My quick and easy solution was to wrap it with some silicone tape to keep the weather out of there. It actually turned out great; and it almost looks factory.
IMG_20190407_084144.jpg
headset service


I am close to getting this thing wrapped up. I am just waiting on some final bits:

new bar end turn signals (already broke them before riding) - a note: I had ordered ones with plastic threads but they broke from tightening; I found identical ones but with aluminum or steel threads so I hope they survive longer

on-off-on switch for turn indicators

new led temp meter for rear motor
Attachments
IMG_20190317_175820.jpg
wires and handlebars
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
Raketemensch   1 W

1 W
Posts: 61
Joined: Aug 04 2018 10:48pm
Location: Northwestern CT

Re: PWD's Rocky Mountain Element - refresh

Post by Raketemensch » Apr 28 2019 2:47pm

I love these stealth builds :shock:

Seriously though, nice work. I'm currently trying to sort out a good temp gauge situation of my own, that looks pretty cool. What'd you use for sealant when you put the hub cover back on?

Are the headlights aimed downward?

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Apr 29 2019 8:08am

Thanks for the comments. I used some old RTV sealant I had. I believe it was this kind:
https://www.amazon.com/Permatex-82180-M ... B0002UEN1U

I've been running it for a couple of weeks now and no leaks have appeared. Also, if you are going to do the eBay temp gauge thing; I find the blue LCD works the best. I found the green one was not visible at all in the daylight.

The headlamps are aimed slightly downward. I ride during the day on "medium" brightness so I'm not too worried about blinding oncoming traffic.

Good luck!
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » May 09 2019 9:39am

The bike has been running pretty well and I'm happy with the modifications I've completed over the winter. The temp gauge is pretty handy. With warmer weather around the corner, I plan on ordering some hub-sinks to help shed the heat from my rear motor a bit better. So far the max temp temp I saw the motor reach was 90 Celsius but the ambient temperature hasn't been over 18 Celcius.

I was reading this thread on Field Weakening to try and understand it a bit better and I stumbled on this nice piece of info:
https://endless-sphere.com/forums/viewtopic.php?t=95174
billvon wrote:
Aug 09 2018 5:51pm
...
One interesting thing I notice with phase advance/field weakening is that when you get to the motor's base speed and keep accelerating you don't notice any difference. But when you get off the throttle (i.e. motor current goes to zero) you get very strong braking as the inverter's diodes rectify the motor's voltage (now higher than the battery's voltage) and feeds it back to the battery. Once you go under base speed it stops regen'ing.
Ah ha! That explains the behavior I am having with my setup. I would still like to know what the following parameters do in XPD for my controller:

Flux weakening level
Flux weakening finetune
Flux weakening position
Flux weakening utrnpoint

does anyone have and ideas?
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Jun 04 2019 3:08pm

Note to future self:

https://e4bike.ru/page/battery-shape-configurator
cell layout.png
I *might actually* be able to fit 14S7P of 21700 cells in my frame using a "bulged" version of the em3ev 6P pack layout.
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
ZeroEm   100 W

100 W
Posts: 106
Joined: May 03 2019 11:53am
Location: San Antonio, TX

Re: PWD's Rocky Mountain Element - refresh

Post by ZeroEm » Jun 04 2019 6:47pm

Do you have another build thread before the refresh?
Did you get the brake lights working?

I am putting together AWD and was wondering what you think about AWD do you like them?
The journey is more important than the destination!
2013 Nissan Leaf S 8 bars 4.9 miles/Kw

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Jun 07 2019 8:47pm

ZeroEm wrote:
Jun 04 2019 6:47pm
Do you have another build thread before the refresh?
Did you get the brake lights working?

I am putting together AWD and was wondering what you think about AWD do you like them?
I don't have another thread for this bike but I do have an older picture (before the refresh):
Magic Pie 2 on rear
Infineon 12 3077 fet controller from em3ev
a single 14S5P battery (barely cutting the mustard)
IMG_20170602_160954-1.jpg
old build
IMG_20170602_160954-1.jpg (220.99 KiB) Viewed 625 times

I did get the brake lights working! The key component was this particular relay:
https://www.ebay.ca/itm/262136733996

Unfortunately the LEDs I chose were not very bright though. I have a new LED strip tail light on the way that will hopefully be brighter:
https://www.ebay.ca/itm/12V-Amber-LED-M ... 2749.l2649

As for the AWD setup, I love it but it does come with a few quirks that need addressing. The leafmotor 1500W is about the largest motor I would want to fit on a bike frame at the moment. Having another motor on the front gives me an extra 1400W or so that would otherwise be mostly heat if I tried pushing that extra power through the rear motor. Although I don't offroad much, the extra traction of a front hub does come in handy.

In other news, I installed a set of Hubsinks today on my rear motor. I did't evenly distribute the thermal grease so I didn't have enough for the last hubsink. Fortunately, I had some (really old) thermal paste for computer components that I used for the last one. I think it works fine. As per the hubsink instructions, I gave the motor a hard workout to get it hot (107 Celsius to be exact). The real test for me will be the final motor temp on my next commute to work:
IMG_20190607_193938.jpg
hubsink1
IMG_20190607_193927.jpg
hubsink2
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Jul 07 2019 10:53am

The bike has been performing well. I recently got to rip along some short hard packed trails that were an absolute blast around 40-50 km/h. There were many ups and downs and even a bit of air. The clearance between my rear fender and racks is not enough so it kept smashing after hard hits. The bike and new battery bag handled pretty well.
IMG_20190629_100701_1.jpg
trail shot
Before that, I had topped up both packs and manage to hit a new record for battery draw:
IMG_20190623_145536_1.jpg
cycle analyst
The motor was pretty toasty though.
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
thundercamel   100 W

100 W
Posts: 183
Joined: Jul 23 2018 2:58pm
Location: Round Lake, Illinois

Re: PWD's Rocky Mountain Element - refresh

Post by thundercamel » Jul 15 2019 11:45am

That's a nice beastly build! This thread was fun to read :)
My Ebike builds - Existing bikes, affordable motor kits, self built 14s6p batteries

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Jul 22 2019 8:48am

Thanks for the comments thundercamel!

Here is my next change for the bike:
IMG_20190721_105437.jpg
new motor
IMG_20190721_105437.jpg (508.8 KiB) Viewed 257 times
This is another leafbike 1500W motor for the rear but this time I'm going with the 4T version instead if the 5T which I'm currently running. The new motor is laced into a 24" rim. It will be getting the Statorade (7mL this time) and Hubsink treatment as well. Here is the difference I'm expecting between the two motors:

https://www.ebikes.ca/tools/simulator.h ... kv_b=13.16

I am looking forward to a higher top speed without flux weakening. The motor gets warmer than I expected during my commute so I am hoping I can get away without using flux weakening for my commute and cut back on the heat generated when riding near top RPM. I expect I will still use flux weakening for fun. The smaller wheel diameter should also help keep efficiency even with my current setup. I plan on increasing the phase current by 30 amps to make up for the different motor winding. I have some 8AWG cable on the way too.
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
neptronix   100 GW

100 GW
Posts: 13910
Joined: Jun 15 2010 5:56pm
Location: California refugee living in Utah, USA
Contact:

Re: PWD's Rocky Mountain Element - refresh

Post by neptronix » Jul 22 2019 10:38am

Looks like a monster of a bike. You must be going fast if your motors are getting hot. What's a typical cruising speed for you?
Efficiency is everything :bolt:

My first major build: 1.6kW 8T MAC motor on a Trek 4500.
The new all-arounder: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: 20" eZee on a Cannondale Semi Recumbent.
Whipper-snapper: ? on a lightweight BikeE Semi Recumbent

User avatar
thundercamel   100 W

100 W
Posts: 183
Joined: Jul 23 2018 2:58pm
Location: Round Lake, Illinois

Re: PWD's Rocky Mountain Element - refresh

Post by thundercamel » Jul 22 2019 10:47am

Wow, that looks just like my ebikeling 1500w motor, seen here. I recently got 50mL of statorade, and just just going to dump 10mL in. Why are you choosing 7mL? I didn't see a number you used last time.
My Ebike builds - Existing bikes, affordable motor kits, self built 14s6p batteries

User avatar
pwd   100 W

100 W
Posts: 271
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: PWD's Rocky Mountain Element - refresh

Post by pwd » Jul 22 2019 10:56am

Thanks Nep. My cruising speed is anywhere from 50 to 60 kmph depending the flow of traffic. There is one particular stretch with a slight uphill where I'm usually cruising around 55 kmph to 58kmph. That puts me just outside the max rpm of the 5T motor (running 14S) and is where I use the most flux weakening. I also tend accelerate hard from stops etc... but the motor does seem to heat up the most when using flux weakening for more rpm.
Current Build:
Rocky Mountain Element
Magic Pie 4 front + Leafmotor 1500 rear w/ WCEC 18fet
em3ev 14S5P 30Q + 14S6P 25R pack
Build Thread: https://endless-sphere.com/forums/viewt ... =6&t=98286

Old Build:
GIANT ATX 980 w/ Cycle Analyst v2.25
Golden Motor Magic Pie (internal controller) X2
14S3P 15aH: 6X 6S 5000mAh + 3X 2S 5000mAh LiPo pack

User avatar
neptronix   100 GW

100 GW
Posts: 13910
Joined: Jun 15 2010 5:56pm
Location: California refugee living in Utah, USA
Contact:

Re: PWD's Rocky Mountain Element - refresh

Post by neptronix » Jul 22 2019 11:35am

I see. Maybe you're 1 cooling mod away from being able to just use the 4T leaf in a 24". When mine was drilled, i could maintain a bit ore than 60kmh perpetually.

..then again, i was always in the tucked position, and i had some of the lowest friction tires one could buy. But you have the advantage of a smaller wheel. Could pan out in your favor.
Efficiency is everything :bolt:

My first major build: 1.6kW 8T MAC motor on a Trek 4500.
The new all-arounder: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: 20" eZee on a Cannondale Semi Recumbent.
Whipper-snapper: ? on a lightweight BikeE Semi Recumbent

Post Reply