[Closed] FAO doubters

Looks great. What could possibly go wrong 🙄

just needs a jubilee clip and duc tape

Jeez you lot would piss on anyone's chips would you not? 🙄

So the rack is structural now is it? 😉

That's horrible, looks like [i]I[/i] welded it 😆

Well OK maybe not quite that bad.

Nope, never was, CBA removing it for pic.

Just imagine it's not there 😛

please can you explain what you have done?

please can you explain what you have done?

sure looks like it....why has he done that....and to a Ti frame no less?

Nope, never was, CBA removing it for pic.

Just imagine it's not there

We can but dream...

To be fair - I'm liking his style on this one

hope he lives 😐

That is so awful; Its does not even appear to be one plate but two straps of alloy with no triangulation. Even if the lower mount stays rigid the calliper will rotate around lower mounting bolt, clash on the disc and just push the glued on top mount straight off. Its laughable its so cruddy. And you claim to be a mechanic and have good physics knowledge? thats one of the worst bodges have ever seen.

Any credibility you ever had as a mechanic is just gone.

harsh but essentially fair by TJ

it really does look like a spoon.

it's an entertaining bodge.

certainly worth doing/taking a photo of/testing.

just, er, don't test it under circumstances where you'll be hurt if it doesn't work very well, ok?

Fortune favours the brave, but remember "there is no spoon" 😉

Please let me be there with a video camera when you first try that brake in anger 😆

Sorry to repeat, but what could possibly go wrong?

A clear example of someone's ambition outstripping their talent.

Magnificent.

Have one of these for effort and entertainment value

[img] [/img]

Why even go to the effort to do all that for a cable disc?

I don't understand.

And you claim to be a mechanic and have good physics knowledge?
Any credibility you ever had as a mechanic is just gone.

Teej, and you claim Al makes ad hominen attacks on you? That was a bit mean.

It's hard to tell from the pics, but at first glance it looks risky..
It seems that any resistance to rotation is reliant on the frictional force in the bolts, and the stiffness of the glue joint? Which are both, ummm not good. Is the spoon connected to anything else in any way other than the single bolt and the glue? (I'm hoping there is something we have missed which isn't obvious?)

Good on ya mate.10/10 for effort. 😀

TandemJeremy - Member
That is so awful; Its does not even appear to be one plate but two straps of alloy with no triangulation. Even if the lower mount stays rigid the calliper will rotate around lower mounting bolt, clash on the disc and just push the glued on top mount straight off. Its laughable its so cruddy. And you claim to be a mechanic and have good physics knowledge? thats one of the worst bodges have ever seen.

Any credibility you ever had as a mechanic is just gone.

I truly am sorry that I appear to have sufficiently upset you to make you act like a crying schoolboy and type without thinking.

Here's a clearer pic, have a think about what you see and see if you want to revisit any of the above before I destroy it. Oh and how is my ability as a mechanic (proven in various lbs over decades) related to my ability as a designer/fabricator? A mere moment's thought establishes the 2 are quite different.

[url= http://farm6.static.flickr.com/5249/5686353032_c83f014d2b_z.jp g" target="_blank">http://farm6.static.flickr.com/5249/5686353032_c83f014d2b_z.jp g"/> [/img][/url]
[url= http://www.flickr.com/photos/7693620@N05/5686353032/ ]IMAG0479[/url] by [url= http://www.flickr.com/people/7693620@N05/ ]alan cole[/url], on Flickr

toys19 - Member
It seems that any resistance to rotation is reliant on the frictional force in the bolts, and the stiffness of the glue joint?...Is the spoon connected to anything else in any way other than the single bolt and the glue?

It's not a spoon, it's 4mm plate steel 🙄 the lower mount is bolted on by 2 M5 bolts to the frame, the upper mount is glue/CF wrap, under the wrap the arm is about 2" long where if mates to the stay.

Robz - Member
Why even go to the effort to do all that for a cable disc?

I don't understand.

(1) You can't get hydraulic discs for drop bar brake levers and (ii) they work as well as hydraulics.

trailertrash - Member
sure looks like it....why has he done that....and to a Ti frame no less?

ti frame - ideal for the bike's purpose, easy to remove the mount & revert if it doesn't work out - would be a lot more tricky if the frame was painted.

[u][b]You lot really haven't thought your flaming through at all have you?[/u][/b]

🙄

I think TJ meant the triangulation on the top mount, I hate to say this but I probably agree with him on this sole point.

I would just quickly add a piece so the top mount was a triangle, then you will be ok. Other then that good bodge.

Al you cheeky bugger I was trying to be constructive not flame you. Unless the top mount is connected to the caliper by some method other than the single bolt then it looks to be a risky design.

toys19 - Member
Al you cheeky bugger I was trying to be constructive not flame you. Unless the top mount is connected to the caliper by some method other than the single bolt then it looks to be a risky design.

It's more to do with the single mount of the bolt onto the frame (if you know what I mean) I think we are essentially saying the same thing. This will cause big bending moments in your frame which are not a good idea.

I love it. Build me one. I'm not afraid of death.

It's more to do with the single mount of the bolt onto the frame (if you know what I mean) I think we are essentially saying the same thing. This will cause big bending moments in your frame which are not a good idea.

TBH I think they are both equally likely to fail for the same reason.

I think Al is trolling, winding us up or carrying out some kind of social experiment..

You really pought to dust your server/comms room occasionally.

I would just quickly add a piece so the top mount was a triangle, then you will be ok.

2 spoons then 😉

The bottom mount looks very nifty though.

And yes bb7's are truly ace and a match for many hydraulic brakes.

Is that a 140mm rotor Al? If so, good. If not, would it mitigate against or hasten premature failure?

Sorry toys I wasn't intending to include you among the lame-flamers.

Look at the line of force into the top arm - what would adding a strut to it achieve? Remember the two bolts are connected by the solid brake mount, and the rear bolt is rigidly mounted by a triangulated strut.

It may of course break! 😀 Truth is I made it that way as I'd kind of ****ed up the mount first time round and CBA making a whole new one 😎 and my plate of steel is getting small 🙁 if it does break a beefier one will follow

Test riding shortly.

I had expected the whole mount to be one-piece - i.e. the "spoon handle" would be joined to the lower triangle. Is there a reason for [i]not[/i] doing this?

You are living the dream Al, most of us can only imagine it.

If that's the dream, at least it explains why I've had such a dreadful might's sleep.

[img] [/img]

I wonder why this hasn't been marketed yet.... 😉

Do yourself a favour, sort out a triangular spoon for the top mount then the caliper won't be able to rotate (well not without bending the stay anyway) and you'll be a lot less reliant on that black scab holding the whole thing together.

You know that blue nylon string you find tied to the corner of old palets...well where's that then? I can't see any.

Does this mean you can't lend your bike to Uri Geller?

Probably a good thing, to be honest.

that should be buried at sea

kleenex "mansize", really??

That DVD player seems a bit dusty, tut tut. 🙂

Looks good.
Take out some [url= http://www.tescofinance.com/personal/finance/insurance/dentalins/index.jsp ]dental insurance[/url] first.

[img] [/img]

ah, is that AV stuff, I thought it was a forgotten corner of some cupboard at cynica-al's work place.

Al I stand by what I say.

No triangluation at all on the upper mount. Relying on the friction of bolts and glue to hold a brake calliper on is stupid.

If the mount was all one piece so had some rigidity then it might work - as it is?

Teej I think you will find an awful lot of railway bridges are held together by friction (admittedly when the friction fails then there is a second line of defence), and lots of CF bikes are essentially held together with glue. I have a Giant CAAD aluminium frame which is held together with glue. Lotus Elan, and I think Elise are glued together?

Its true the mount looks iffy, but lets try and solve this and not just use it as an excuse to lay into someone you have a personal vendetta against? Your behaviour here is unedifying.

That looks like a shocking bodge.

You may be a skilled mechanic, but frame modification is not your forte...