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EATSRHPV front Suspension load test
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- Опубліковано 8 гру 2014
- This is the front suspension of my homebuilt Electric-Assist Tilting Suspension Recumbent Human Powered Vehicle (or EATSRHPV for short!) slowly takes shape. (ok, that is a mouthful isn't it? :-)
In 1984 I built my first recumbent trike and with rear hub motor electric assist added a few years ago, I have been riding it to work and back since then. Now on the 30th anniversary of the construction of that trike, it is finally time to build the successor in my home workshop.
Here is my Build Blog:
www.bentrideronline.com/messag...
And my UA-cam Channel with many more videos:
/ @martinhill9011
Brilliant! Good luck with finished project... Like a bunch of other youtubers - you are way ahead of me - but thats ok - inspirational...!
Guao, excelent video, You give a vision that y must to make my system of direction of my motorcircle. Thank You
Very nice my friend.Keep going.
Martin, I would say 750 #. because that is standard for dirt bike rear suspension. Very nice trike.
Nice work 👍
Muito bem explicado!vou fazer meu próximo assim!👏🏻👏🏻👏🏻👏🏻
Thanks Marcelo. This video shows how the tilting suspension works in the near final vehicle: ua-cam.com/video/koADanl4-vo/v-deo.html
Супер!! Молодец!!
You have the rates about right but what I did observe was at full tilt the outside wheel would be virtually horizontal given there will be an angle to the axle from the spindle! This could be rectified by reducing the static angle on the uprights or by lengthening the upper "A" arms!
Actually the wheels do in fact stay parallel at full tilt as you can see in this later video: ua-cam.com/video/koADanl4-vo/v-deo.html
Hi Martin,
How do you keep your balance when leaning in to corner? Same as motorcycle, or does this suspension somehow "keep" you leaning the right amount?
The tilting Steering levers allow the rider to control exactly how much the trike tilts. This video shows how the mechanism works: ua-cam.com/video/koADanl4-vo/v-deo.html.
Also, this other video shows how a rider sitting in the trike controls steering and tilting directly with those levers: ua-cam.com/video/isTuNC2p3T8/v-deo.html
Martin Hill very interesting and informative. Nice idea to control leaning with same steering levers. I have found some different solutions for motorbikes, that do not have any lean control, basically you ride and balance it like a motorcycle.
But in case of this bicycle, you can not lean in to corner naturally, so some kind of lean control is needed.
How natural does it feel to you? Would you recommend diy'ing something similar for personal bike, or would you like to try something different next?
At pretty much any speed except for crawling along negotiating bollards on a path or something, you steer the trike by tilting the steering levers. So instead of leaning into a curve with your body, you tilt the steering levers to initiate a turn and that leans the vehicle and thus steers the wheels in the direction you want to go thanks to the castoring-effect.
I find this extremely natural and it requires very little force on the steering levers as centrifugal forces come in to play as you tilt allowing you to come back upright at the end of a turn just by letting these forces act to right the vehicle. It feels much like a 2-wheeled bike leaning into and out of curves. This is why hydraulics or electrical stepper motors are not required for tilting - I am simply gently tilting the levers and the vehicle responds.
However, because I am always able to control the tilt with the levers, if ever anything goes wrong, I am in complete control and can stop the trike over or under-tilting unlike a free-tilter where you are in danger of falling over if something goes wrong. For example when I hit a slippery patch on the ground I often have a bit of fun doing controlled slides which would be lethal on a two-wheeled bike or free-tilter trike.
I love this design and definitely plan to continue in this direction with plans to further improve the steering and tilting geometry by getting dished wheels to allow me to put the steering kingpins vertically inside the wheels to allow parallel turning axis's and thus enable up to 45 degrees of tilt compared to the 30 degrees that the trike is currently capable of.
I also plan to move the inboard swing arm pivots to the centreline of the vehicle to eliminate the exaggerated tilt angles of the swing arms and thus also reduce the tyre wear that comes with the distance between the two front wheels varying when tilting.
Martin Hill looks like you are having lots of fun :) Awesome, thank you.
very good info; thanks for your time.
What size shocks did you use on your suspension? 350lbs
Hi Fred, the shocks are actually scavenged off cheap Kmart dual-suspension bikes that were put out for verge collection so the shocks are nothing special. I'll have a look and see if they have a rating printed on them.
I was planning on replacing them with nice lightweight air shocks, but they have been performing so well in the meantime I'm not sure if I'll bother. :-)
Hi did you ever find out what size the suspension was??
hello, it was a long time ago, do you have any drawings with dimensions with a front suspension?
Sorry, all the plans are in my head. :-)
Could you share the plans??
Unfortunately the plans are all in my head. When I finally get around to drawing them up, I will post them. Sorry.
Please when you will do the plans , share . Have a great day
atv도 이런씩 쇼바가 좋을듯 하다.
How many rupees for this kit
Not for sale sorry emdr, it's just a personal project of mine.
Eso es para una moto o bicicleta? Gracias saludos desde Zarzal Valle del Cauca Colombia
Hi Orlanda, this is the front suspension of my recumbent trike. More videos here: ua-cam.com/channels/y5hIJH6TQ5sob3XYsXMlAw.html
manda uma dessa aqui para o Brasil?
Sorry, I can't seem to translate your comment to English.
Martin Hill send your project to Brazil? or send the full suspension to Brazil?
Martin Hill I'm trying to make a recumbent trike. here you do not have
Sorry Ulisses, I've built the trike for my own use as a commuter vehicle.