1175 How To Make A Dual Freewheel Differential For A Paper Trike
1175 How To Make A Dual Freewheel Differential For A Paper Trike
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Nice and good
Brilliant, Professor. Geometry 101.
Almost all your stuff in your page is sold out.
Un maestro… No hablo inglés y lo endendí igual. Muy Genioooooo
For the next video you can show us the crash when the brakes don’t work.
Hi Rob. I played with this idea to go onto a recumbent delta trike based on a design sold by a family design team here in Canada. Their build projects (and there did quite a few) used square tubing for many fabricated parts. I came up with another ‘version’ of the differential you describe there after getting my hands on two large "finger ratchet wrenches" – these are like a conventional square-drive socket ratchet wrench, but with no handle. They’re meant to be used in tight spaces. I got a pair that took 1/2" drive sockets (I later revised the design to use 1" square drive socket wrenches) and after more than the usual messing around trying to do for 5 cents what any fool can do for $5, I had a differential real axle that worked quite well. At the time, I was planning to use 48-spoke 27" rimes for my rear wheels. A machinist in Australia very kindly made up a set of 48-spoke hubs, and (miracle of miracles) I found some high quality 48-spoke rims for sale by a British maker. At the time (2010-ish), the pair of rims cost just over CAD$110, plus 6 pounds 95p for postage. They arrived in three days – some kind of record in anyone’s book.
Since we have ice and snow about 8 months of the year, one over-riding concern was/is cold-weather operation. I also hoped to have an "electric assist" system that could be activated for steep hills, etc. The rear end – axles, bearings, ratchet-based freewheel/differential(s) plus the necessary frame were pretty much complete by 2013, along with about 2/3 of the rest of the frame and front end. Then someone stole the whole works, plus all of my welding gear. In the same period, I became permanently disabled and so was retired from engineering (cold-weather methanol fuels among other things) and there were two deaths in the family, all in a very short amount of time.
My disability required quite a bit of revision to the basic recumbent delta trike, but I did get some plans drawn up. However, not being able to work (and therefore being without income), plus dealing with two separate family wills pretty much put the whole project on hold. Since then, because of an accident and new factors arising from disability, plans will be changing yet again.
It was suggested to me to consider using motorcycle wheels for the rear pair, rather than bicycle wheels and rims. This idea has some merit, but make a home-brew differential more difficult. Reason #1 was simply tire and wheel strength. The most frequent points of failure on bicycles and tricycles here are flat tires and damaged rims. Of people who commute using a bike or trike, 44% report at least one flat tire every 10 days. The other main reason for considering motorcycle wheels was better traction and (by using Aluminum) a lighter overall rear assembly. If an electric assist was still a possibility, weight is a major problem. Being poor (where I once was not) has really made this proposition difficult and unlikely. There are very few "free" or inexpensive sources of modern batteries to be had. The cost of material and welding equipment for at least part of the frame being changed from steel to aluminum tubing is a big obstacle to this idea as well.
Road conditions here are not ideal much of the year, but I mention that proposal in the interest of completeness. It seems unlikely and unaffordable at this stage. Anyhow, I love your design for this simple implementation of a working differential, and I have seen actual examples on hand-built trikes locally. Cheers from northwest Canada.
Всё хорошо,,, но единственный "МИНУС"…. под комментариями нет "перевести на русский"… я не понимаю Ваш язык😥
I became a member a few minutes ago so I can watch a detailed video about this A Dual Freewheel Differential Please Robert let me know whre can I find this video on th members only list. I will make one for me and I want to buy the same axle and other things you use. Thanks Arquimides
Why should left wheel need 2 freewheels?
this is amazing. I’m working on my alt ev also at the moment
A thing easy why you talk to much
Can you explain the best way to introduce air to a wood or gas burner .using the hot air from the room you are trying to heat causing drafts. or the colder air from from under the floor Alex.
Brilliant, thanks for sharing the information 👍
Where did you get the parts ?
pretty good idea, am gonna try it…one day
Remarkable idea indeed!!!
😂 😂 😂
Hello Robert what axel are you using for this project please
I wonder what will happen if you pedal while turning?
What if you use a one way freewheel, will it be able to reverse?
Bo that won’t work, if njust push the one of it will do freewheeling, but if the shaft under the turk both will move forward.
But the brake will not work
They make left hand drive and right hand drive bmx geared hubs these days….you can skip the welding part for your left side. Look up Profile hubs.
Brilliant idea. Although I do not totally get how it works, I am sure I will do at some point. The diff problem has always been a biggy when it comes to 2 wheels at the back. I have tried a cart with one powered wheel, but even that system works best when the powered wheel is on the outside of the corner.
oh my god, you sir are a genious! that’s so simple that I was not even thinking about doing this kind of solution 😀 but one question though, the threads on the wheels are in a different order once they are flipped, so one wheel tightens as it spins, the other one will untighten, or am I missing something? also, will the brake be usable on the shaft once it’s all mounted up?
he knows very ugly probes your project is horrible to me where do you get that you know how to do things better waste time putting together aluminum cans or something but what you do
i was trying to figure out how to make one. thank you.
do you have video of building a trike?
Sorry Robert – you need to learn the difference between an axle and a hub! The axle is the bit which is at the centre of rotation but which does not turn!!!
Thanknyou for this relaxt video..best wishes from the middle of the Netherlands
traduzir em Português
Nice thinking, very simple with easy to find parts, but mounting brakes, there’s nowhere to put calipers as it stands with the frame mounted where it is.
Up to the welding I was entertaining hope for my cambered rear wheels with independent axles.
nice, but no back gear
Great work 👏 👍 👌
This man has helped me so very much. I’m making a Delta trike camper and this made it a peace of cake, thank you!
Pardon my ignorance here but I’m looking into making a 2 stroke converted trike from a run of the mill, inexpensive 7speed trike. I’ve been trying to figure out how to fix the rear sprocket (the drive cog that comes with the conversion kit) to the axle without f’in anything up. I might have to get rid of the rear brakes but I’m not worried about that. I haven’t gotten the bike itself yet but was wondering if the newer bikes (getting it brand new) are two freewheels on the back and not a fixed axle so I wouldn’t have to worry too much about slight turns at speed. I won’t be going very fast anyway but just wondering if the motor being fixed to the middle of the axle will mess that up. Maybe a stupid thing to ask I hope some of that made sense. But thanks to videos like this my understanding is steadily growing!!
Great video. I’ve been thinking about building something similar for my grandsons. I was stuck on the rear axle. Pretty sure they are not ready for a drift trike lol
This video was as if I had ordered a sandwich and you were telling me what is on it
Thank you, kind sir
انگلیسی من ودوستان خیلی ضعیف است بنابراین نمیتوان فوروارد کرد.اما اگر زسرنویس انگلیسی داشته باشدترجمه آسانتر خواهد بود.لطفازسرنویس دار کنید.
I’m building a tadpole 3wheeler using two 16in rear bike wheels. The have freewheel coaster brake hubs.
The wheels are still driven by the chain and pedal cranks, but I cut the cranks to just stubs and are connecting the two with a shaft.
So the shaft spins the cranks that drives both wheels. I thought this will work like a differential, but it isn’t the same, as when the shaft is powered, both wheels must spin at the same speed, but if you stop powering them they will freewheel and can turn at different speeds. So you can’t power through a turn like a true differential.
Just thought someone might like to know about this setup, will have this project on my channel soon.
What a lovely bloke! Pleasure to learn from you sir!
A lot of work to FAIL. Both wheels still spin at the same speed when driven. It only works when your drive sprocket isn’t moving. Sooooo… Differential Fail.
Awesome explanation & walk through demonstration 👍
For most users, 2 wheel drive trikes are overcomplicated. I built a semi recumbent delta trike with one wheel drive over 12 years ago and have done more than 25,000km on it. I have only ever had traction problems in mud and snow.
Making it single wheel drive made loads of problems go away and gave a load of advantages. To move the drive from the centreline to the left wheel, I used a technique from Atomic Zombie. This adds a separate drive shaft half way between the pedals and rear wheel, with one chain from the crank to this shaft and another chain from the shaft to the driven rear wheel. The shaft is made from a bicycle wheel hub, split it in half and a tube welded between the 2 halves. A 10mm steel rod is easily threaded with the standard bike axle threads and the old bearings reused. If a rear wheel hub is used, rear derailleur gears can be used in the centre shaft, as well as the rear wheel, doing away with the dreadful front derailleurs, which are always unreliable.
By using this technique, I have 6 front gears, 7 rear gears, giving a total of 42 gears!!! Other advantages are an open area between the rear wheels for a cargo box, shorter chains (recumbents often have very long chains) and everything is easy to access for maintenance.
I am thinking of adding electric augmentation on the currently undriven rear wheel by simply replacing the wheel with one with a hub motor.