Warren's 350 MAC mid-drive (finally) recumbent

Discussions related to motors other than hub motors.
This includes R/C motors, botttom bracket, roller and geared drives.
Warren   100 kW

100 kW
Posts: 1326
Joined: Oct 05 2010 11:35am

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by Warren » Aug 10 2017 9:28am

Having a wife who not only could, but apparently had an interest in lacing a bike wheel is very impressive. Lucky man!

User avatar
rowbiker   100 W

100 W
Posts: 120
Joined: Jul 16 2013 1:36pm
Location: Saint Paul, Minnesota USA
Contact:

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by rowbiker » Aug 11 2017 8:29am

Warren wrote:Having a wife who not only could, but apparently had an interest in lacing a bike wheel is very impressive. Lucky man!
Agreed! :)

Warren   100 kW

100 kW
Posts: 1326
Joined: Oct 05 2010 11:35am

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by Warren » Sep 02 2017 1:14pm

Thursday, I rode over Southwest Mountain again, to the market on route 20, for a milkshake.
SW Mountain.jpg
SW Mountain.jpg (116.71 KiB) Viewed 1506 times
top of SW Mtn.jpg
top of SW Mtn.jpg (104.23 KiB) Viewed 1506 times
I am always frustrated that pictures don't really give you a sense of distance, or grade. You can see at least 200 yards down a 15-20 percent grade, and it looks almost flat.

Mid 80s, windy.

47.58 mi, 2:28.43, 19.1 av, 37.8 max, 758.25 Wh, 15.9 Wh/mi, 28,934 miles, so far

Warren   100 kW

100 kW
Posts: 1326
Joined: Oct 05 2010 11:35am

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by Warren » Sep 17 2017 11:42am

For five and a half years I pulled 24 Ah/80% out of the pack on almost every ride. By the end of May, in 2016, I was still pulling 24 Ah out of the pack, but the voltage was sagging. So I put the extra Leaf module I had from the eight module pack I bought for my cargo bike back in August of 2015, in series with the Ping pack. That brought the performance and range back to better than new for a year. On June 26th I got a low cell cutoff at 22 Ah. This keeps getting worse and it is now down to 20 Ah, and 940 Wh before cutting out. I am hoping it hangs on until the new 21700 packs start showing up.

8551 Ah, and 29,022 miles so far

Warren   100 kW

100 kW
Posts: 1326
Joined: Oct 05 2010 11:35am

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by Warren » Jan 21 2018 5:26pm

Today was my first ride in a month! We were stuck under the polar vortex, but it seems to have moved on now. Saw three runners, and a ripped young gal on a MTB. Probably all UVA students. Also saw a Tesla Model X, of course. Getting within ten miles of Charlottesville, it is almost guaranteed. Did the Southwest Mountain ride again. Just like a bit further up the page. Except when I got to the little diner, they are no longer open on Sunday. That was OK. It hit 69F, and it felt so good to be on the bike again. I love our new Chevy Bolt, but it is a car. Which means it is totally boring, unless you drive like a complete A hole, on public roads.

User avatar
rowbiker   100 W

100 W
Posts: 120
Joined: Jul 16 2013 1:36pm
Location: Saint Paul, Minnesota USA
Contact:

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by rowbiker » Jan 22 2018 8:34am

I feel your frustration. Until the day before yesterday (Saturday), I hadn't gotten a decent ride in since early December. The same Polar Vortex plaguing you in VA was, of course, hitting us up here in MN. It was the road conditions that were mostly the culprit though, not the temps. Even with 4 rows of studs on back and front tires, it just wasn't worth it. Saturday got above freezing, so we finally could see some road surfaces. The studs will handle the slick ice of 'refreeze', so we got a nice ride in (my 'winter bike' is a Bacchetta G20), with only human power.

What's the prognosis on your battery pack, and how close to 21700 availability are we really?

Warren   100 kW

100 kW
Posts: 1326
Joined: Oct 05 2010 11:35am

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by Warren » Jan 22 2018 6:26pm

The pack is hanging in there, still OK pulling out 20 amp hours. I have no inside track on the the new cells. Paul, at EM3ev might know. Rode the RANS cargo bike today...63 miles. Bikes are the best!

Timelord   1 W

1 W
Posts: 57
Joined: Sep 10 2010 8:56pm

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by Timelord » Jan 26 2018 12:47am

rowbiker wrote:
Jan 22 2018 8:34am
and how close to 21700 availability are we really?
That's a great question. There's an article from mid-2017 on electricbike.com calling them the up and coming thing, written by none other than spinningmagnets. Asked if we might finally see some aftermarket packs a year later. Not only silence, the comment got deleted. I get the impression the answer is not close at all. At this rate, something else might be the "hot" item before these have good availability.

User avatar
rowbiker   100 W

100 W
Posts: 120
Joined: Jul 16 2013 1:36pm
Location: Saint Paul, Minnesota USA
Contact:

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by rowbiker » Jan 28 2018 12:25pm

Thanks for the info. I assume that if Tesla et al. switch from the 18650's to the 21700 format, things could change in a hurry. I'm fairly heavily invested in the 18650 format, but like most of us, have been habituated to spending way more money on batteries than we should have to. I'll very likely jump on the next bandwagon that comes along, whatever it is.

User avatar
neptronix   100 GW

100 GW
Posts: 13962
Joined: Jun 15 2010 5:56pm
Location: California refugee living in Utah, USA
Contact:

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by neptronix » Dec 30 2018 5:17pm

2170 is just a different cell format. It's slightly better for ebikes because you can pack a little more power in using a 3mm wider battery cell and get away with it.

But the whrs/kg, power delivery, etc on all the datasheets i'e seen is roughly the same as what we see in 18650's.

Brand new look! same great taste! :lol:
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
neptronix   100 GW

100 GW
Posts: 13962
Joined: Jun 15 2010 5:56pm
Location: California refugee living in Utah, USA
Contact:

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by neptronix » Jun 03 2019 10:32pm

How's this bike treatin' ya lately?
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

Warren   100 kW

100 kW
Posts: 1326
Joined: Oct 05 2010 11:35am

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by Warren » Jun 05 2019 4:11pm

After 30,135 miles, the Shimano freehub froze up. The rear derailleur didn't like fixie mode and wrapped up the derailleur, and tossed the chain into the spokes. My otherwise perfect rear wheel was destroyed. I have been going back and forth about converting it to a left side mid-drive, with a Grin Tech DD motor, Phaserunner controller, and 72 volt EM3ev battery pack.

oldwahoo54   10 W

10 W
Posts: 72
Joined: Apr 11 2014 7:19am

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by oldwahoo54 » Jul 20 2019 9:41am

Hey Warren,

Which Shimano hub did you get 30K+ miles on?

I froze up the freehub on my latest build after 200 miles. It was a used bike, and I don't know the history, but have been having convos with the guys at Blue Wheel about which way to go, replace freehub or build up a ridiculously expensive rear wheel. Getting an education in hubs in the process.

oldwahoo54   10 W

10 W
Posts: 72
Joined: Apr 11 2014 7:19am

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by oldwahoo54 » Jul 20 2019 9:42am

BTW, you're a legend in the bike shops around here.

Warren   100 kW

100 kW
Posts: 1326
Joined: Oct 05 2010 11:35am

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by Warren » Jul 21 2019 9:52am

oldwahoo54 wrote:
Jul 20 2019 9:41am
Which Shimano hub did you get 30K+ miles on?
It was a NOS, 1990's, Japanese made, Deore XT, Parallax.

Warren   100 kW

100 kW
Posts: 1326
Joined: Oct 05 2010 11:35am

Re: Warren's 350 MAC mid-drive (finally) recumbent

Post by Warren » Jul 21 2019 9:57am

oldwahoo54 wrote:
Jul 20 2019 9:42am
BTW, you're a legend in the bike shops around here.
Big Foot and I are best buds. :-)

Post Reply