HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Articles FAQ Contact About




Post new topic Reply to topic  [ 1744 posts ] 
Go to page Previous  1 ... 97, 98, 99, 100, 101, 102, 103 ... 117  Next
Author Message
PostPosted: Wed Oct 16, 2013 7:21 am 
Offline
Carbon Cowboy
User avatar

Joined: Sat Sep 04, 2010 7:20 pm
Posts: 975
Location: Slovenia
Yes some of the tubes change a bit. The seat tube, seatstays and downtube are round/oval. The toptube changes it's shape all the way, and also chainstays of course.

Yes, basicly I started with this project to see how a different layup will perform. In theory it should be a bit improved and it may save some weight. But mostly because I changed a bit the design of the seatstays. Otherwise in general the thickness is pretty much the same, but there will be more layers, or better said more thinner pieces of carbon (the thickness will be prety much the same) used for this project. It's a bit more specific layup and I'm really interested how it will perform compared to my previous frame project.

_________________
Berk PROTO-TYPE Composites - Handmade In Slovenia
Berk Composites
http://www.berk-composites.com/
info(a)berk-composites.com


Top
 Profile  
 
Posted: Wed Oct 16, 2013 7:21 am 


Top
  
 
PostPosted: Wed Oct 16, 2013 8:21 am 
Offline

Joined: Fri Jan 28, 2005 11:51 am
Posts: 253
Location: arezzo (italy)
Hi berk,

have you ever considered to start project for frame with moulding process? Draw frame on cad and then make frame's part mould with a cnc machine. I have a littele hobby cnc machine and I would like to try this technics, in your opinion what are the biggest problems?


Top
 Profile  
 
PostPosted: Wed Oct 16, 2013 8:50 am 
Offline
Carbon Cowboy
User avatar

Joined: Sat Sep 04, 2010 7:20 pm
Posts: 975
Location: Slovenia
Hi danny,
sure I did, but the main problem are at this moment the costs. Basicly I made the moulds by myself and they're ok, but of course I would really like to make it someday with a CNC machine and with metal.
The second problem is that all those companies where they make me those moulds are just too busy or not really willing to work on those moulds. For example that's the problem with my saddle project, where I wait for weeks/months to get the moulds. Otherwise once I have one mould I can make more moulds by myself (I can copy it and make a carbon fiber mould..). If I would have my own CNC machine I bet I would realize all my projects as soon as I would get the idea, but as an 21 years old studend I really can't afford it yet. Hopefully some day:)

_________________
Berk PROTO-TYPE Composites - Handmade In Slovenia
Berk Composites
http://www.berk-composites.com/
info(a)berk-composites.com


Top
 Profile  
 
PostPosted: Wed Oct 16, 2013 3:41 pm 
Offline

Joined: Fri Jan 28, 2005 11:51 am
Posts: 253
Location: arezzo (italy)
in your projects do you ever use prepeg or only normal cloth? I know the problem for prepeg is to storage in a fridge but have more put life for working.


Top
 Profile  
 
PostPosted: Wed Oct 16, 2013 5:45 pm 
Offline
Carbon Cowboy
User avatar

Joined: Sat Sep 04, 2010 7:20 pm
Posts: 975
Location: Slovenia
I do have some prepreg properly stored, but at this moment I don't really work a lot with it. But my aim is to completely switch to prepreg as soon as possible.


Here just another update, also glued the seatstays, the weight at this moment is 668g:
Image

Next step is to make the carbon reinforcements on the joints, it may add around 200g, we'll see...of course some more sanding etc. to do before I start with the last step of carbon work.

_________________
Berk PROTO-TYPE Composites - Handmade In Slovenia
Berk Composites
http://www.berk-composites.com/
info(a)berk-composites.com


Top
 Profile  
 
PostPosted: Wed Oct 16, 2013 6:24 pm 
Offline

Joined: Thu Jun 03, 2010 6:20 am
Posts: 348
Congrats on reaching 100 pages Berk! Your body of work is simply ridiculous.


Top
 Profile  
 
PostPosted: Wed Oct 16, 2013 8:16 pm 
Offline

Joined: Fri Jan 28, 2005 11:51 am
Posts: 253
Location: arezzo (italy)
which type of bb do you use in this project? pressfit?


Top
 Profile  
 
PostPosted: Wed Oct 16, 2013 10:01 pm 
Offline
Carbon Cowboy
User avatar

Joined: Sat Sep 04, 2010 7:20 pm
Posts: 975
Location: Slovenia
@tharmor
Thanks, I just love this work!

@danny
Yes it's pressfit BB30, like I have on my PT5 bike.

The headtube is tapered 1 1/8 - 1 1/4

_________________
Berk PROTO-TYPE Composites - Handmade In Slovenia
Berk Composites
http://www.berk-composites.com/
info(a)berk-composites.com


Top
 Profile  
 
PostPosted: Thu Oct 17, 2013 3:56 am 
Offline

Joined: Sun Sep 15, 2013 10:20 pm
Posts: 52
Hi just wanted to say I went through each of the 100 pages and very impressed with your work and dedication. Amazing!


Top
 Profile  
 
PostPosted: Thu Oct 17, 2013 10:01 pm 
Offline

Joined: Tue Oct 04, 2011 9:16 pm
Posts: 155
Thank You Berg to repair my saddle. Regards from Spain


Top
 Profile  
 
PostPosted: Thu Oct 17, 2013 11:40 pm 
Offline

Joined: Wed Feb 01, 2012 9:12 pm
Posts: 16
Jure, any chance you can post up some pictures of your bladders and techniques for making them out of vacuum film, I'm very interested in your process.
Bill


Top
 Profile  
 
PostPosted: Sun Oct 20, 2013 10:59 am 
Offline
Carbon Cowboy
User avatar

Joined: Sat Sep 04, 2010 7:20 pm
Posts: 975
Location: Slovenia
@layer29
Wow, thanks :beerchug:

@trilocus
No problem!
(repaired the saddle rails and also changed the leather, sorry for the bad photo quality)
Image

@progetto
Unfortunatley I don't have any photos at this moment, can make them as soon as I'll have the chance. Otherwise I make the bladders by myself, I think that I already posted a photo (not sure?) from the bladder that I used to make the chainstays.

_________________
Berk PROTO-TYPE Composites - Handmade In Slovenia
Berk Composites
http://www.berk-composites.com/
info(a)berk-composites.com


Top
 Profile  
 
PostPosted: Thu Oct 24, 2013 7:25 pm 
Offline
Carbon Cowboy
User avatar

Joined: Sat Sep 04, 2010 7:20 pm
Posts: 975
Location: Slovenia
Headtube reinforcements in process.
Image

This time I'll reinforce each joint separately, just to get all the details how much does each reinfocement weight...this frame should have around 800g once it's finished.
Compared to PT5 it should have the similar properties, but with more than 100g lower weight, mostly because I changed a bit the chainstays and toptube, and the complete layup is different..I'll keep you updated!

_________________
Berk PROTO-TYPE Composites - Handmade In Slovenia
Berk Composites
http://www.berk-composites.com/
info(a)berk-composites.com


Top
 Profile  
 
PostPosted: Fri Oct 25, 2013 8:45 pm 
Offline
Carbon Cowboy
User avatar

Joined: Sat Sep 04, 2010 7:20 pm
Posts: 975
Location: Slovenia
Headtube bearing seats are also made with carbon:
Image
On the photo you can see also the moulds that still have to be prepared for some carbon work

_________________
Berk PROTO-TYPE Composites - Handmade In Slovenia
Berk Composites
http://www.berk-composites.com/
info(a)berk-composites.com


Top
 Profile  
 
Posted: Fri Oct 25, 2013 8:45 pm 


Top
  
 
PostPosted: Fri Oct 25, 2013 9:01 pm 
Offline

Joined: Wed Feb 01, 2012 9:12 pm
Posts: 16
Thanx for the construction photo's Jure, it's always good to see how people tackle this side of the work. Keep them coming.
Bill


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1744 posts ] 
Go to page Previous  1 ... 97, 98, 99, 100, 101, 102, 103 ... 117  Next


Who is online

Users browsing this forum: Google Adsense [Bot], Verbal and 24 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Your opinion of Berk Composites saddle

in Road

wheelsONfire

5

700

Sun Nov 09, 2014 11:10 pm

zrima View the latest post

There are no new unread posts for this topic. Knight Composites - 'fastest carbon wheels ever'

[ Go to page: 1, 2 ]

in Everything wheels

pdlpsher1

28

3006

Fri Dec 19, 2014 9:30 pm

bm0p700f View the latest post

There are no new unread posts for this topic. FS: Parlee Z3SL (55.5) ENVE/EDGE composites SL tubes.

in For sale - Pictures are mandatory 22-3-13

eigner

0

259

Sun Dec 14, 2014 10:36 pm

eigner View the latest post

There are no new unread posts for this topic. Parlee Z3SL (55.5) ENVE/EDGE composites SL tubes.

in For sale - Pictures are mandatory 22-3-13

eigner

0

407

Fri Oct 03, 2014 7:24 pm

eigner View the latest post

There are no new unread posts for this topic. Composites World webinar on light weight bicycle frames

in Cycle Chat

Dexter

3

503

Sun Oct 26, 2014 7:08 pm

wheelsONfire View the latest post


It is currently Sat Dec 20, 2014 9:56 am

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB