What Would You Build?
- Thread starter vkray
- Start date
vkray said:
Other than the weight, I'd build this:
https://endless-sphere.com/forums/viewtopic.php?f=2&t=67833
(well, I *did* build that; it's what I use all the time).
LewTwo
1 MW
A Bangkok Electric TuK-Tuk :thumb:
https://thethaiger.com/hot-news/transport/powering-up-tuk-tuks-for-a-new-era-in-bangkok
https://bkkfoodie.com/electric-tuk-tuks-with-plastic-partitions/
https://thethaiger.com/hot-news/transport/powering-up-tuk-tuks-for-a-new-era-in-bangkok
https://bkkfoodie.com/electric-tuk-tuks-with-plastic-partitions/
Chalo
100 TW
vkray said:
If those were the things I wanted for myself, I'd probably stay home and drink myself into an early grave.
How about start with a real bike, and ride in the street where vehicles belong? I know we all have issues, but I think it's important to try.
LewTwo
1 MW
In Houston the sidewalks are in worse shape than the streets (which are nothing to brag about either). Perhaps it is different where he is.BalorNG said:
dogman dan
1 PW
You never said cheap, so ,,, https://www.electrictrike.com/products/fat-tad-cxs-tadpole-electric-trike
Great trike for riding up curbs, rough pavement, and such. Some of those ADA curb designs work only for wheelchairs, but are hell on trikes unless they can curb hop.
But you might also look at this, if youd like something to ride right into walmart on. https://www.libertytrike.com/
It can get into the tight corners of ADA sidewalks, and breaks in two if you want to carry it somewhere in a car.
Either one will require a second battery for a really long ride. But the slower speed and small wheel of the liberty trike might just go as far as you really need on one. The faster fat tad would need you to carry a second battery for the second 20 miles.
Weight will not be 230, unless you weigh 150 or less.
Please don't joke about the early grave, he might be closer to it than you think. I never seriously considered getting there quicker when I was so sick, but I was pretty sure Id never see 2020. Imagine my surprise when I finally got a bit better. But in 2010, about the only things keeping me from thinking about suicide was my st bernards, and a ride around the block on an e bike. I certainly could not walk around the block then.
Great trike for riding up curbs, rough pavement, and such. Some of those ADA curb designs work only for wheelchairs, but are hell on trikes unless they can curb hop.
But you might also look at this, if youd like something to ride right into walmart on. https://www.libertytrike.com/
It can get into the tight corners of ADA sidewalks, and breaks in two if you want to carry it somewhere in a car.
Either one will require a second battery for a really long ride. But the slower speed and small wheel of the liberty trike might just go as far as you really need on one. The faster fat tad would need you to carry a second battery for the second 20 miles.
Weight will not be 230, unless you weigh 150 or less.
Please don't joke about the early grave, he might be closer to it than you think. I never seriously considered getting there quicker when I was so sick, but I was pretty sure Id never see 2020. Imagine my surprise when I finally got a bit better. But in 2010, about the only things keeping me from thinking about suicide was my st bernards, and a ride around the block on an e bike. I certainly could not walk around the block then.
dogman dan
1 PW
And perhaps he does, which is why I suggested the liberty trike, that is designed with that type use in mind from day one.
Seriously, none of the other big adult trikes can easily negotiate inside the grocery store. But the liberty trike does that, while easily going where mobility scooters cannot go.
Seriously, none of the other big adult trikes can easily negotiate inside the grocery store. But the liberty trike does that, while easily going where mobility scooters cannot go.
vkray said:
Select a trike. HPV Gekko 20 is great rigid frame candidate.
I gather you want simple yet a full range of gearing, as you will loose the front derailleur with a Mid Drive.
Easiest to install is the Golden Magic Pie Edge Hubmotor with throttle only. Controller is integrated in the hub and uses Bluetooth to connect to a cellphone as well as optional LCD. As a Direct Drive motor it's an added 12 lbs of motor alone. You'll either prefer to use a throttle or not at all, not much in between it seems when it comes to preferences.
Most suitable would be a Bafang MG310 with a Baserunner Controller. The controller is a separate unit so it needs to be mounted. Not difficult if one is handy. Kit will have mating connectors but may require some wiring skills. The MG310 is a geared motor that freewheels - no cogging drag, and no regen, but far more efficient than a hub drive. Smaller battery can be used and the hubmotor only adds about 5 lbs. Somewhat stealthy with smaller size, yet more powerful than a Direct Drive of twice the weight.
On a 20" rear wheel with Hubmotor a 24mm wide rim with a Schwalbe Big Ben 20 x 2.5" wide rear tire and 20x1.75 Marathons on the OEM 19mm wide rims ride and handle really well on a Gekko 20.
Battery sizing; Volts equal speed, Amps equal torque, Amp Hours is hour many Amps it can put out in an hour.
Sparing the details, on motor only at 20 MPH, figure you'll burn about 15-18 Watt-Hours per mile, round up to 20 WH/M.
Best battery life is when the State of Charge (SOC) is kept between 25%-85%, so effectively for long life plan on 50% of the rated Watt-Hours (WH).
Worst case = 20WH/Mile * 20 Miles = 400WH; and double that for 800WH. Started with Worst Case as thats where these discussions end up.
On the flip side for a normal case @ 10 MPH the Burn rate will be about 1/4 (4-5 WH/M) so a 200WH rated battery could work as long as the Current output (Amps) is within limits.
Volts * Amp hours = Watthours (WH).
This may help visualize components etc.
http://www.triketech.com/Drivetrain/PowerAssist/HPV-MAC-V2.html
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