Build E-Bike Trike for Parkinson's?

[drewberz]

Anyone have experience with a build for someone with Parkinson's? Any particular features useful? My father is doing a build for a male relative. He was thinking of starting with a trike platform and adding a Bafang middrive.

 

[drewberz]

What's the budget?

Shimano automatic transmission?

Sub $1.5k all in. Based in flat Florida, so I think a 3 speed would be sufficient and a singlespeed may even be enough.

Some things I was wondering is how to handle the power delivery, throttling at low speeds, bike handling and stability at any speed.

 

[rich c]

He'll really have to tune down that mid drive motor. Nearly all trikes are unstable at anything but very slow turns because it is unnatural to lean on a trike with the frame geometry. Even brutal on a negative grade slope. I've been over three times on my tadpole recumbent, once on my head while still clipped into the pedals. On tadpole and delta trikes your legs are almost straight out and leaning and pedaling is difficult. On a traditional trike the handlebars are higher and the center of gravity is really high. So none of them are known for stability in turns.

 

[autobike543]

That's why I started a thread "Active Lean E quad bike" for Disabilities

 

[autobike543]

I think a lot of modern motorcycles have this gyroscopic sensor for yaw, pitch and roll movements.
I'm not an engineer so I am not sure.

Vehicle Dynamics Control Systems for Motorcycle

Motorcycling is a fascinating kind of transportation. While the riders’ direct exposure to the environment and the unique driving dynamics are essential to this fascination, they both cause a risk potential which is several times higher than when driving a car....

link.springer.com

Schröter K., Pleß R., Seiniger P. (2015) Vehicle Dynamics Control Systems for Motorcycle. In: Winner H., Hakuli S., Lotz F., Singer C. (eds) Handbook of Driver Assistance Systems. Springer, Cham

As you can see lately some of conception trikes and 4 wheeler in the auto/bike show but none put to production yet, gyro and computer control hydraulic actuators are expensive, my plan only traditional elements control "Active Lean"

 

[drewberz]

oh okay, yeah automatic transmission would eat up your budget fast.

I don't know if mid drive is a good idea.. since it requires you to be in the right gear.. whereas hub drive can still let you twist the throttle and go if you need to.

Ok, good to know thanks!

 

[drewberz]

He'll really have to tune down that mid drive motor. Nearly all trikes are unstable at anything but very slow turns because it is unnatural to lean on a trike with the frame geometry. Even brutal on a negative grade slope. I've been over three times on my tadpole recumbent, once on my head while still clipped into the pedals. On tadpole and delta trikes your legs are almost straight out and leaning and pedaling is difficult. On a traditional trike the handlebars are higher and the center of gravity is really high. So none of them are known for stability in turns.

This is my fear with the BBSD/BBHSD series-too much oomph. Initial thought is to design around a traditional trike style too.

 

[drewberz]

As you can see lately some of conception trikes and 4 wheeler in the auto/bike show but none put to production yet, gyro and computer control hydraulic actuators are expensive, my plan only traditional elements control "Active Lean"

Are you still trying to take it to market?

 

[drewberz]

Will it be torque sensored?

The reason why I do not like torque sensor is because it doesn't give "umph!" and gives very smooth and natural feeling.
Torque sensor does such good job micro-adjusting the power and hide the assist, I couldn't even tell when the assist was working.
It doesn't matter if I'm riding a hub driven bike like Stromer, or mid driven bike like Haibike, I could not feel the "umph!" at all.

I really like zippy ebikes, to me, torque sensor is just boring.
I understand that many people prefer torque sensor because cadence sensored bike can be unpredictable.

It is worth noting that many people commented that BBSHD torque sensor sucks. Though, most BBSHD owners use cadence sensor anyways and they like to go fast.

Whatever is smoothest, so torque sensor would be better. What kind of controller and sensor would you use for a sub, relatively high torque, 15mph application? Just starter playing around with Justin's motor simulator. Thinking single speed now.

 

[autobike543]

Are you still trying to take it to market?

The mass production of front end kit is ready, waiting for the order of export trader, the trader have their complete bike models assembled with my kit, There are several prototype kits, and I had ever sold 1 kit 3 month ago to west coast of the States

If someone wanted to build a quad bike with active lean function, I can also customize the control unit and some linkage parts either, a few pieces of laser cut plates are not expensive here