Northwind Watch this space…IM SURE I would even paint it gay pink for you

Its a double edged sword

In the Uk we who make stuff use prepreg which generally is an epoxy reinforced carbon fabric around 40 quid per SQm for a material called 300k fibre with an ltm or mtm(low/medium temperature cure resin system) now if you recall our previous conversation on materials this is the low end there are differing fibre systems and on top of that differing resin sytems

the fibres are like types of tree for example softwood /hardwood/

some fibre systems are called intermediate modulus some are high modulus …guess what the cost goes up toward the high modulus but they are much stiffer than the normal modulus fibres so in theory you use less but as they get more high they become a bit brittle so its like glass strong but fragile this means we then start to mix fibres

this is the true beauty of composites/ think of it like if you know what you want it to do you can tune it !!!unlike a metal which has defined properties if i want to make metal stiffer i can but it costs money if i want a composite to be stiffer i just add a layer of a low medium or higher modulus material

imagine that 40 quid SQ/m rolled up to make a solid bar THE AVRAGE LAYER THICKNESS BEING 0.12 MM alternately look at protrusions

heres a tip go to goodfellows they do scientific materials (very expensive) look up solid carbon bar the production method dictates the price

people think carbon is expensive??? its not but engineered properly it can be!!!

aluminium alloys are wee bit different the two high strength ones most folks know about are your 2000 series and 7000 series
does it not have a marking on its length aluminium usually has a black dot etch describing temper and chemical makeup

2000 series are pretty hard to weld 7– series not hard to weld till you hit the 7075 alloys and then thats just using fusion welding there are other ways of welding upper end 7000 series alloys and 2000 series alloys without fusion welding but they are ok strength wise

6061 is like the does lots of stuff aluminium alloy

but it depends like steel what he heat reatment and alloying content are

2000 sounds low on the scale which considering it follows 1000 series its quite a shocker you can make ot quite strong

5000 series is a good un for toughness but in pretty thick sections

if its a CDT or craft tech class you probably know it as he30 in a T6 temper which is a 6000 series alloy if its wrought alloy its pretty hard if its extruded or bar extruded stock it will be a soft aluminium sometimes in what is called O spec but maybe T4 ITS HARD TO TELL UNLESS ITS ON A BENCH IN FRONT OF YOU

I just moved to langsett you can have a ride out over cut gate and the surroundings my house is bang there at upper midhope

en1a

AB no im just an engineer im afraid i just figure the it wont break stuff out…though i was told to be more of a contact point for questions which is fine….im accused by some US framebuilders for being too secretive and i kind of like it that way !!!

The SCANDAL is OK just like it was intended

400 notes was the initial discussion fee

forgot to add someone will always find a way to circumvent your patent
and so remember the main true statemnet that you will never have enough money to sue any one !!!!!!!!

Just another thing make sure the patent has no military use whatsoever and you will be very surprised what that covers as this just means …**** right off we are taking it DESPITE ITS ORIGINAL USE and its amzing how they come across these things in every industry

There are some funny things happen that are beyond the designers control bad heat treat? bad alloy constituents.. wrong welding rod.let CY get to the bottom of it before the firing squad line up!!!!!

nvidia quadro anything forget the gt cards they are pants

no brant was always designing bikes just there was more money to be made designing things that go fast round tracks or hold the wings on jet planes
…

Im sure the edge design precedes the dw or giant …now theres a law suit if ever I saw one if only they had lasted a bit longer

the designs have just been sat in a hard drive.

not a new idea outhere ATMO

I sent CY an email the otherday as i have a proto shop right under the house…maybe you can bob a long for a visit

Get a patent but remember in china they dont give a flying dragon
400 notes starts the ball rolling so if its so good and you have faith in your product ,Its not a gret deal of moolah then comes the rest of the just like personal injury lawyer buisness of we know best (but sound like a bunch of bulls have shat here before)legal advice that you pay through the nose for!!!!!!!!

if you dsclose the idea to anyone like your mate be aware he will shag you right up the arse regardless what agreement you have when its worth 20 million

best advice do it yourself ,get some made, ride on the wave ,then move on.

Unless you just invented teleportation or a cure for aids its pretty pointless trying to patent it anyone who has a effin clue will know that you did it first and it might be OK

do i sound cynical ….wonder why

theres a new one on the erm horizon

monsieur spoon if the 40 quid tesco special cant pass muster its very likely they shouldn’t be selling it (as i would just go out and buy one hit my head on the pavement and never have to work again on the settlement)if it does pass i might just pack in designing stuff anyway

pmsl at brant

i was going to add some stuffa bout european cocks but it was bad taste

:lol: the good thing is that people are at least aware of the CEN est and if it passes they are buying a good product

hopefully the increase in weight isnt going to be a moaning point alterntely if it passes the CEN and weighs nowt and the cost doubles hopefully it will still be a moaning point but people will still give away their free money.

The standard does not apply to specialised bicycles bicycles designed for severe environments or competition events

there you go downhill and competition bikes set yourselves free

On-One will have 2 full sussers in about 2 months designed by me but made in the far east.A marathon racer and a Ride all day model

just in time for christmas

Im hoping you will start to see mixed material frames a while ago i did a steel rear end with a very stiff carbon front …costs lots = people dont like

Theres a basic get out of jail free card right at the very beginning which states CEN members… and also bicycles for racing are different

en14781 covers “racing bicycles” and it doesn’t really say la la land either

it was more to cover your halfords specials with cheese for bearings etc

the custom builder just needs to test one frame and once it passes he could stick the next one together with brass nails obviously a reputable builder wouldn’t use brass nails but he has the paper to prove it passed and doesn’t have to say he changed the method of construction …you see im cynical its supposed to bring in an element of QC ……lol

I used to spend a lot of time over on frameforum and to be honest custom builders are a law unto themselves theres a great deal of debate as to what makes a custom builder the time served builders or the newbies who have done about a month of building but with no materials engineering knowledge whatsoever are quite happy to flog you their second frame (they even mess with carbon fibre which is like playing with fire) and from some of the things you see they are dangerous

theres a limited feeling the standard was brought in to up the cost of frames by needing enhanced or improved material and engineering (if you have ever cut open a frame to find fibreglass instead of carbon as a material filler in a carbon frame this is understandable

but one of the engineering facts is the frames are failing , that longer fork increases the magnitude of force being pushed into the frame and the fatigue test cycles have been increased so its a pretty sure fire that the tried and tested tubeset from 10 years ago wont take the brunt from an engineers point of view its just a problem we need to solve…. a fun project

To sum it up basically you can sell a frame that doesn’t pass sell millions of them if you want but if you knowingly sell it in europe in a CEN member country and just 1 guy has an accident the personal injustry lawyers will tear you a very new shiny arsehole to go along with the leg you dont have to stand on

if it passes a pretty tough test with flying colours then the next one off the production line fails it doesnt matter it passed the test once so its safe the fact that it was a fluke doesnt matter you have a pretty solid defence as long as you didn’t change the specs the buck gets passed to mr wu who in reality wouldn’t give a flying **** what the french say anyhow …but from our point of view our arse is covered

in a positive sense all the buying folks can have a bit of confidence that if its a quality company the frames are consistent …its a damn good product and i think that goes for most peoples reputations mentioned above

and of course it means no more cheap chinese imports

Yeah its just like F1 only cheaper ………..lol

Im doing this at the moment for brants old firm was called in to do the maths…

heres a problem that has been caused by a bit of non forward thinking
originally bikes had short forks and the test was relatvely simple to pass because of low cycles and low stresses

couple in the multiplication in force due to modern fork length increases and expectations and somewhere the loads got bigger and no one really paid the blindest bit of notice?!!! in reality…till the CEN test and industry compliance date got closer and closer

There are two choices you make its easy enough to make a frame that will pass the test under 4.75 – 5lbs but it costs money and a bit of cleverness to do it.This doesn’t really go in the direction of the customer a steel frame that costs the same as a carbon hardtail….hmmm

The other way is just throw material at the problem It depends which side of the engineering fence you sit on and a shedload of other minor but important bike designing considerations

Carbon frames are easier to get to pass the tests at a relatively light weight and for a fair few years I have been watching the old wives tales propagate about carbon and its pretty funny

The 456 was the tough nut in the range its simpler just to remove a steel frame and replace it with a carbon equivalent