My 84 Engagement Hope Hub

[Mr Motivator]

After some quick AutoCad, heres what your normal Hope freehub looks like;

http://www.trials-forum.co.uk/forum/index....md=si&img=14713

After some more AutoCad, this is what my custom freehub will look like;

http://www.trials-forum.co.uk/forum/index....md=si&img=14714

My custom freehub will consist of 4 offset pawl seats. Each pawl will ingage individually, just like the Echo 72ept hub. They look wonky, but that is how they have to be. As you see 3 will devide into 21 as a whole number, but 4 will not go into 21.. So.. ((360/21)/4)+90)..*2..*3.. That won't make sence to most of you.

There will be obvious concerns about trusting all your weight on one pawl at a time instead of all three, but it works for echo "just" so it'll work for me.

If it comes out good, I might make 3 or 4 and sell them off, I'll be machining them myself and will use either Ti or Stainless Steel, but right now it's all work in progress.

Give me about a year and it'll be on my bike

Sam

[King C]

That explains the need for this then.

[Mr Motivator]

Yep.

It'll be interesting to see how it compares to my King. Well, on the engagement issue anyway.

[PaRtZ]

well its worth a try but make sure you test it in a safe manner...thats all ill say

I think I understand what you're saying, but why would there be a problem if you had them all "un-wonky" as you put it, because surely if all but one won't engage in the "normal" milled slots, then all but 1 won't engage in the wonky milled slots It's hard to put across what im saying but I think you *may* have made things overly complicated

However Im no expert on this so don't go nuts

Good CAD work atleast

[Mr Motivator]

well its worth a try but make sure you test it in a safe manner...thats all ill say

I think I understand what you're saying, but why would there be a problem if you had them all "un-wonky" as you put it, because surely if all but one won't engage in the "normal" milled slots, then all but 1 won't engage in the wonky milled slots It's hard to put across what im saying but I think you *may* have made things overly complicated

However Im no expert on this so don't go nuts

Good CAD work atleast

Nah, because then you risk it going.. "click, click.......... click........ click... click.."

It would work the way you are saying, but it wouldn't be a 'regular' click. It would be "off beat" as to say.

[smelly joe]

Have you thought that if there is only one pawl engaging at a time it would also be a good idea to design yoursef some new pawls for it out of a different material so it would be stronger, as the force that is on just one standard xc pawl would probably snap it or make it skip like a bitch.

It sounds like a good concept but whether it will work will be a different story

Good look with it anyhow

[PaRtZ]

Nah, because then you risk it going.. "click, click.......... click........ click... click.."

It would work the way you are saying, but it wouldn't be a 'regular' click. It would be "off beat" as to say.

ahhhh and you want it to sound right

[Mr Motivator]

Have you thought that if there is only one pawl engaging at a time it would also be a good idea to design yoursef some new pawls for it out of a different material so it would be stronger, as the force that is on just one standard xc pawl would probably snap it or make it skip like a bitch.

It sounds like a good concept but whether it will work will be a different story

Good look with it anyhow

Yeah, I could redesign the way the pawls work completely. However, it's something else to make at the end of the day, and I was thinking that if someone wanted one, all they need to do is put this in and keep the rest of thier internals.

Good idea though. I will think about it and see if there is a foolproof solution. I could make all the spacers inside too, but with holes in so they are lighter

[tank_rider]

I seriously wouldn't do that unless you plan on never having any children. Single pawl engaguement is like aids, you never want it.

[Mr Motivator]

But just like Aids, there is a cure.

I'll think of something

[tank_rider]

since when can you sure aids!!

you can't cure it, just suppress its effects for a while.

unless you plan on making the pawls out of some very exotic material you won't find anything strong enough to withstand the forces experienced.

[totaltrials]

You would have to totally re design the hub if you want to do that, the hub will flex far too much, as it does but with 1 pawl only it's very sketchy.

Phil.

[Mr Motivator]

Suppose so, we shall see. I'll do it anyway

As for the aids, err, yeah.. Cull the people with aids, then it won't spread. Cured

Edited May 9, 2006 by member1495

[Will Arnold]

as phil said, it gonna flex biatch, my old one with 3 engaging at a time flexed so much it left ratchet imprints everywhere

also, where did u hear about echo hubs engaging one at a time?

[Mr Motivator]

Yeah, there are notches from the ratchet cut the freehub I have here. Well, it would be a good solution for XC boys too, they don't have to stamp too hard on the pedals, but they need the engagements for hill climbing.

Echo hubs, ummm, dunno looooooong time ago. Or maybe it was the first hope trial hub?

[Onza Kieron]

Why not have 2 sets of 3 engageing, = 42 e.p and very reliable, seems a good idea to me. Or even 3 sets of 3? if you had room to fit the pawls in. I would buy a body to suit 9 pawls....

[Will Arnold]

Why not have 2 sets of 3 engageing, = 42 e.p and very reliable, seems a good idea to me. Or even 3 sets of 3? if you had room to fit the pawls in. I would buy a body to suit 9 pawls....

i think 2 at a time is the best way, theres less chance of one missing if theres only 2 to be synchronised if you get what i mean.

also, the 1 pawl idea wouldn't skip much, but would flex all over the place unless a whole hub would be designed around it IMO

[steve sturt]

AIDS wears off after a while. you can speed this up with a bit ot lemsip.

[deanie-b]

Nice one

I think your grin is gonna get loads toothier after trying this one .

[Ashley Smith]

all I can say is hmmm to that idea, it would work but would be very sketchy, one of the first prototype hope hubs had one pawl engaging at a time to give 72 engement points, thats skipped like a biatch

oh well its a project

let me know how it goes on

ash

[Al_Fel]

If you pull it off I'll eat my king.

[IOLO]

making one for 2 set of 3 wud be better, but its gotta be exact.

and dont make a single pawl engangement, as peepl hav said it will flex way to much and be crap

sorry, good plan though

and it still mak eit just to experiment with,, just dont use it for trials, or on a bike. haha

iolo.

[Concussion]

Nice one....I love new ideas like this. Gotta agree about the flex issues but respect anyway!

[the_soon_to_be]

sam, you better pull this off so i can see someone eat a king

let me know if you need aany help

[STEVE-0]

Yeah, there are notches from the ratchet cut the freehub I have here. Well, it would be a good solution for XC boys too, they don't have to stamp too hard on the pedals, but they need the engagements for hill climbing.

Echo hubs, ummm, dunno looooooong time ago. Or maybe it was the first hope trial hub?

Surely xc people only need small engagement because most of the time they are pedaling and they want something REALLY REALLY light and also smooth, therefore less friction slowing them down etc etc.

I dont think its a good idea, because if it was someone would have probably come up with it by now.

Good effort anyway....

Steve