... is your drivetrain on the left hand side of the bike?

you spotted the deliberate mistake ;)

I've fixed that now, when I brought the two wheels into the assembly model, I cocked up the positioning of the rear wheel and didn't notice

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Ghost rider

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http://RoadID.com/...te/4HC4V-TAFQ9XPJDTX

How could this possibly go wrong ? ;-)

Could clag a lotus badge on the front ;)

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I know the work of digital modelling so don't get me wrong... don't want to sound too fussy, but I am pretty sure the 808 rear wheel has more spokes than the front wheel (:
correct me if I am wrong.
Nevertheless doesn't matter for the framedesign - really looking forward to see some designs

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sent from my iPhone

So you're building the design around the wheel location? Um...

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Some are born to move the world to live their fantasies...

https://triomultisport.com/
http://www.mjolnircycles.com/

No, I'm modelling all of the components in the full bike assembly.

Currently, these components are positioned in the same place as my P3, as a reference, a starting point
as I get into the frame design itself, then I will play with the positioning of all the carry over/bought out parts

There is no point designing the frame, if you don't know the sizes of the parts that will fit to it

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Who is going to build it?

Do you really need to know the size of the parts, or just the interface dimensions? For example, do you need to model an entire rear derailleur or do you just need the bolt hole location, B-screw tab angle, and clearance zone?

Why do you want to do this?

What brand of wheels are you planning to use?

There is no point modeling the parts until you know where they're going to go, and you won't know that until you design the frame around your position. Things like wheels... All you need is the BSD of the rims and the max tire size.

I do my own frame designs on CATIA V5 (currently -- way overkill, but hey, it's available to me). Sure, they're not molded CF, but the process is the same.

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Some are born to move the world to live their fantasies...

https://triomultisport.com/
http://www.mjolnircycles.com/

We all have our different methods I suppose, I don't "need" to model everything, I just want to ;)


Just for info, I've been a Design Engineer for over 20 years, starting on CATIA v4.18 (actually applicon bravo was my first system, but no one remembers it) working on aerospace, motorsport and performance cars, now working in cockpit systems for Jaguar LandRover, so I'm not new to this

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And I've been doing the same in aerospace for 25 years, what of it?

Knock yourself out if you want to make a very data-intensive pretty picture, just don't think it's actually helping your frame design.

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Some are born to move the world to live their fantasies...

https://triomultisport.com/
http://www.mjolnircycles.com/

I have an idea for a custom bike. Can you fab it for me?

Seat is too high.

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Its a brooks man, that is how you ride a brooks TT bike.

In that case, it's not worn in enough.

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http://www.kanebikes.com/ || Road & Triathlon Bicycles. Custom Painting. Carbon Repair. Restoration. HQ'd in North Carolina

Lots of hate here. There's a huge surprise. Have fun with your project, even if it is just a picture. In the end, if it's something you enjoy spending time doing then it's worthwhile. Looking forward to seeing what a non bike builder's imagination comes up with.

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"4 wheels move the body, 2 wheels move the soul"

+1 ignore these miserable buggers and have fun. I built my own electric guitar using methods which were probably completely wrong, but I don't really want to play any other guitar now.

Creative thinking outside the box will at the very least be an interesting process, hopefully leading to fruitful discussion.

To the OP: I presume you're primarily concerned with designing a triathlon bike? I wonder if you could incorporate storage solutions (not sure if they're patent protected or not!) of the Shiv Tri down tube water bladder, Cervelo P4 frame water bottle/storage directly above the bottom bracket (which most bike companies try to place as an add-on) and Trek rear storage. Possibly a single water bottle rear carrier co-molded to the seatpost. Might be an interesting exercise in integration.

There is no hate at all.

I applaud the hacking spirit. Hacking is a lot of fun, and has lead to all kinds of awesome stuff in the world. The world needs more hackers!!

I do my hacking in software as I am a programmer by trade, but I surely don't fault someone who does 3d modeling and races tris from hacking a bike design. That is perfect.

I am poking a little fun at the topic in general though. Why announce your new bike project by posting a picture of wheels. That is kind of silly. it would be like if I did this.

Tired of trainer road? Want a better system to train that comes with you on your bike rides? I do too, so I am starting development as of last week. Here is a hint of what I have done so far:

You don't get to question ANYONE using a French version of Windows XP!!

(Quote is the new like....I heard)

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sent from my iPhone

So you are building a 3D model of a bike...and then what are you going to do with it? Make a little 3D printed toy model to put on your desk?

knocked up a few more bits

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Really cool video. Guy seemed chill and down to earth, not to mention smart.

We all have hobbies. Some people have hobbies that require the skill and patience I don't have. And I commend those people.

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"4 wheels move the body, 2 wheels move the soul"

I'll open with the caveat that I don't have to build the dang thing. That said:

- why s-bend extensions? I'd go dead straight for reduced frontal area, just like the end of the bullhorns
- If you lofted an aero profile for both sides of the bullhorn bars, why not maintain it all the way across the stem clamp area? You'd need to make a custom stem, but for a tri bike you've got adjustability that is independent of the fore/aft location of the stem clamp. (i.e. adjusting extension length and pad fore/aft) - so you only need to be so close.
- along the same lines, integrate the clamps for the extensions into the horizontal wings (I think HED and old Easton bars had that), so they'd end up being about 1 1/2" lower. Then you can lower the pads too, and the extension - to - pad elevation differences will be more manageable.
- since this is all still vaporware - why not try to get the top tube directly in line with the stem extension? You'll have to play some tricks with the upper headset bearing, but it's been done before.

that's my two cents; file accordingly...

No worries, I apprecia positive feedback

It's modeled the way it is because I'll probably be using the cockpit I have, 3T aura

I might change my mind later though ;)

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I thought he was using Chinese knockoffs..... Sorry, couldn't resist.

Its looking more bike like now

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How do you plan to test structural integrity? That would be my number one concern even over performance.

Serious question though. I'm not a designer/engineer so is it built into the CATIA? I'm assuming if you design motorsport cars you know how to test the stress levels or whatever.

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Madison photographer Timothy Hughes | Instagram

honestly, I have no idea, but I have access to the software, so I will be using this to learn some new skills

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Catia has an FEA package if you have the license for it. Unfortunately it's quite easy to get it to pop some numbers out and a colourful picture. I say unfortunately because how accurate the numbers it pops out are, are intrinsically linked to how well the problem is set up. The Catia FEA allows basically anyone to set a problem up but the less experienced the user the less likely the numbers are to be correct. In my experience using it I question everything it spits out and verify everything possible with alternative methods. Then when I am 99% sure it's correct I go ahead and verify everything all over again. FEA and CFD packages can point you in the right direction but they are merely a tool and junk in = junk out.

Iain

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Training Full Time in 2015: http://www.triopensource.com
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I'll keep that in mind, thank you

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No worries, hope it didn't come across as too preachy but it is easy to be led down the wrong path by it.

The whole things looking nice now, any particular reason you went for a beam design?

Iain

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Training Full Time in 2015: http://www.triopensource.com
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no, not preachy at all
Working for such a big company means I don't do my own FEA, so I'm modelling this to learn a few things

why a beam bike, no reason other than they seem to be the thing at the moment

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I like the ultra low frontal area fork =)

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

kind of has a fork now :D

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If you don't send this to Mr. 3D-Prints-His-Own-Bikes and actually produce it, I'm gonna be mad.

Actually, that frame looks way, way better than any of the current beam bikes on the market. (Sorry, but the Diamond is ugly as sin).

Two questions: any reason you're planning your own fork rather than just doing what everyone else and using a Cervelo fork? (FK26 or whatever nonsense?)

Secondly, is there going to be any CFD on this? I imagine that your company's server time will all be busy doing... you know, work... but it would be really amazing to see.

Since you're getting so much negative energy in this post, I propose these as the wheels: http://bikesnobnyc.blogspot.com/...on-rims-provide.html

As an FYI OpenFOAM is an open source CFD software that you could download and try at home. You need Linux for it though.

I've not yet used it but believe it to be quite a powerful solver. I have it pencilled in for a future project of my own.

Iain

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Training Full Time in 2015: http://www.triopensource.com
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Hmm, its bee a while since I dabbled with Linux
I might throw another drive into my workstation and install it

Any recommendations for a linux distribution? previously I played with suse, redhat and a bunch that I forget




/flexing my terminal fingers ;)

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I don't I'm afraid as I've yet to download it. I had originally planned to chuck it on before moving out here as learning it's on the jobs list for this year. (I've done a bit of CFD and written my own simple CFD code but not used this package.) But I'm not going to need it until a little while later and when I saw linux it moved to the back of the jobs list!

If you do stick it on I'd be most interested to know the route you took. I've used linux in the past and know the machine it was on had windows and linux but thats about it.

Iain

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Training Full Time in 2015: http://www.triopensource.com
http://www.facebook.com/iaingillamracing http://www.twitter.com/iaingillam
https://www.youtube.com/...9JYCrOLP34Qtgp5w1WsA

For ease of installation and quick accessibility, I recommend Ubuntu. Been a while since I've used SuSE or Redhat, but neither was as "plug and play," as I recall. Of course, since you're doing image intensive stuff with likely a fancy high-end graphics card, you'll probably have to trial-and-error your video settings a bit anyway.

I've started on the stem and I think I have invented a new clamping system. I've googled and I can't anything similar


time to apply for a patent :D

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been working on the front brakes

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Looks good! Two things:
1. maybe try to get the stem and top-tube to line up.
2. you might rethink the junction between the top tube and the down tube. I suspect such an acute junction would not perform well... just my intuition and it seems many of the super bikes have avoided it as well.

I see your point about the top tube, down tube interface and once I get the overall layout modelled, I can start testing and tweaking. My top tube is deeper in section than the cervelo's and the scott due to it being a beam bike. again, I haven't done any FEA yet

I don't like my "after thought" area around the stem either. I'll alter that, I might even just raise the top tube up


thanks for the feed back

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