Adaptive Cycling: Handcycles, Amputee Adaptation, Visual Impairment, and Other Needs Have a need for adaptive equipment to ride to compensate for a disability or loss of limb or function? This area is for discussion among those of us in the cycling world that are coming back from traumatic circumstances and tell the world, "No, you are not going to beat me down!"

In need of help please. Handcycle

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Old 07-07-18, 09:45 PM
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AbiliTTV
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Exclamation In need of help please. Handcycle

Handcycle 2018

The trouble:

It takes way to much force to pedal. Well over double the force to pedal.

The mechanics:

All wheels move freely.

Chain moves freely.

Brakes do not bind the rims.

Cables provide proper room to move, turn and function as needed.

Gears are shifting properly with rear wheel off the ground.



Things I have learned since:

The double U joint can use rods designed for it. Didn't know that until recently. Using 1/2" square tubing that is not doing as well as I hoped. Will order the DD 3/4" x 36 inches that should allow tighter steering.

I am showing images to ask for any help figuring out what I did wrong, or need to change...

Also, does anyone have a way to check or insure the front wheels are true and aimed in exactly the same alignment as the rear? I thing they ever so slightly scrub to the left. This could add a little resistance to overcome, however not as much as I am getting....

Here is my FB page with the images. For some reason I can not get images to upload here. https://www.facebook.com/abilitv The images are right under the 15 second video of my boom box.

Also I am aware that the drive chain is loose and needs shortening or adjusting. It is not causing the issue of making it much harder to pedal... From what I can tell.

I have mo idea what on earth I am doing, as you can see from my images. So if you do know what's going on, it would be epic if you could help me get this rolling.

I built it all from scratch, no plans, videos, or anything. In fact what I made in 3D before wasn't done differently.

No welding, all bolted together. Using class/Grade 8 Bolts for the outrigger arms, and front header tube/steering pin holder. And, class 10.9 for the kingpin arms, and the kingpin brackets.
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Old 07-08-18, 11:14 AM
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Question

Nice try, at the home built BTW..

You may have to get it to a bike shop and have them take a look at it, in person.

the one here has dealt with some pretty complicated machines ..

and maybe adding electric motor assist will be needed, if the lower leg use loss is more recent ,
and arms musculature has not developed to the extent its possible ..

Rear wheel hub motor is most simple .. pedal electric feedback boosts just when the cranks rotate..


can you offer non FB pictures? not all have signed on.

You just have a lot going on there,
in things that will be adding up in energy losses..
so really no comparison with a simple bicycle drivetrain..






..

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Old 07-08-18, 12:39 PM
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Trying the upload feature again, this time using Firefox. Tried in Chrome and for me Chrome didn't work.

Hey this worked.

All the cable housing is full length. and moves smoothly. I am using Jagwire.

Here is where I originally had the chains set on the chain rings and cassette.

Handcrank chain ring (3 rings) on the largest. LEFT SIDE

The drive crank - Largest of the three chain rings. LEFT SIDE

The gear shifting chain ring/crank at largest ring. RIGHT SIDE.

The rear cassette - Largest cog. - RIGHT SIDE.




TODAY -
I did adjust the drive chain on the left to the smallest - LEFT SIDE

I then shifted the right chain ring to the smallest.

I moved the cassette to the second from largest cog to avoid crossing the chain. I think this is what it is called. Learned about that last night.


This does make pedaling somewhat easier...

I am not interested in power assist. Unless I can find it for $100 or less. Then I might consider it.







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Old 07-08-18, 07:57 PM
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Build it right. I had it in the wrong gear.

Today spent the day resetting the chain to the proper gear ratios.

I moves the front pulleys so they are centered to both sides.

Then took her for a test run....

She works. Now to just fine tune a few things.

I tried showing a video of me using the bike... It won't upload. Wrong format.

But, it was a pretty good and fun ride.
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Old 09-13-18, 11:56 PM
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That is a bada$$ build right there! Nice!
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Old 09-21-18, 08:50 PM
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Thank you.

I am pleased as a punch to report I took it out on from 10am to 2PM around my Towne village, and to the local park.

All of the main mechanics are (knock on my forehead ) working spot on. I have gone down a few curbs, over a bit of grassy field as I expected it was able t handle that sort of off road.

Taken her down a death hill as I call it.... Only cars can handle it. Most people can't even walk up it..

I realized I need some power in my brakes. So will save for Shimano Deore V Brakes.

The brakes I gave are V style brakes thst offer a soft brake feel. Even when I have them adjusted to produce a firm hard stop.

Oh yeah I am carrying a 25 lb boombox, and towing my wheelchair everyplace I go.

I originally used a camping chair frame for the main support of the rear rack.

I was just going to adjust it when I decided to have some fun with a rim I removed the spokes from.

I cut it in half, and adapted the ends to attach to the bike rear and the upper had holes for alignment for the top of the rack.

I then took two neck/handlebar holders and attached them to the rear of the flat part. Took one handlebar and slid it into the necks and tightened down.

​​​​​​This configuration is about 200% or more stronger than my oiginal ​​​​ design.

It is also about 50% lighter.

The bike weighs in at about 70lbs
The rear rack weighs about say 10 lbs.
​​​​​Boombox is 25 lbs plus say 5lbls its saddle that keeps it from falling.

Then the tow hook weighs 5 lbs
The wheelchair weighs 15 to 20 lbs. TiLite ZRA series 1

​​​​​​In the short time I have used this my arm and chest mules as well as my core mules have been working hard.

Imagine a weight workout for your upper body and cardiovascular at the same time.

My arms are already bulkier than ever with just my wheelchair.

And, man is this comfortable to ride. When I park and transfer to my wheelchair I quickly realize how comfortable I built this to be.

My handcrank design gives me two hand holds. One for flat roads, the other when starting from a dead stop going up hill... And, taking breaks on the hill.

If you imagine a rowing type feeling, I get to pull and push my way up hills.

This builds up stamina like no tomorrow.

From what a neighbor says his son has a nice handcycle and he told me, his son says it tires him out. Thst it is one heck of a hard workout.

I told him I noticed that also, and that is exactly why I built this as I did.

​​​​​​I have gotten her up to 30 MPH down hill and zero shimmy.

To see more if interested of course my Instagram is AbiliTV

All in all this bike has turned out 1000% better than I ever hooped.

I ride every other day to allow muscle development just like at a gym.

The real kicker is everything is bolted together no welds yet have been done to her.

I figure if I can't get things stable and solid with bolts... I don't trust a weld to hold up much better.

​​​​​​And, thanks. Everyone that sees her is amazed at the fact I use my arms and blown away when I say I built it from scratch. No plans, no video. Just out of my head as I went.

​​​​​​


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Old 09-21-18, 08:59 PM
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JusThe road I wheeled up as it is up hill to get to the local bike / triathlete shop Endurance House Zionsville and Fishers where I popped in to say hi




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Old 09-21-18, 09:06 PM
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The bike has a headlight, a horn, and a taillight that is above and behind my head.

It has a combined total of 4 feet of reflector tape. 14 front facing reflectors. 8 side reflectors. And, a few in the back.

And two small round red blinkers.

Soon will have a bike alarm. and I will get a long shackle padlock to lock to lock the handcrank.

Never know what people might take.

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