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Berk PROTO-TYPE 3

Discussion on bikes, and whatever...

Re: Berk PROTO-TYPE 3

Postby ... » Mon Jun 06, 2011 10:34 pm

It's true, it would be a sin if I won't make it with the integrated saddle by all those combos that I make...And of course it will be very light.
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Re: Berk PROTO-TYPE 3

Postby Thomskie » Tue Jun 07, 2011 10:07 pm

Everytime I see the ... as last post I get excited Jure!
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Re: Berk PROTO-TYPE 3

Postby ... » Wed Jun 08, 2011 12:30 pm

I'm glad to hear that :cheers:

Here are just a few new photos of the frame, the tubes are only glued together, I still have to reinforce the joints, make some more work on details, surface,...anyway, hope you like it:

Image

Image

Image

Image

As soon as I'll manage to do the carbon work I'll let you know.

I also have to decide how I'll finish the frame - graphics/paint, matte or gloss,..will see
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Re: Berk PROTO-TYPE 3

Postby Ypsylon » Wed Jun 08, 2011 1:42 pm

very nice!

cool yard as well!

Do you know what the individual tubes and pieces weigh? Would be cool to know how the weight is distributed over a cf frame. You'd think the down tube is the heaviest, but maybe I'm wrong.
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Re: Berk PROTO-TYPE 3

Postby ... » Wed Jun 08, 2011 8:41 pm

Thanks for the compliments!


The heaviest is the seattube :grin: , but I still have to cut it..but anyway, about the individual parts, unfortunately I didn't weighed them after I shaped them, but it's somehow like this:
-chainstays 120
-seatstays 80g
-downtube 165g
-toptube 85
-seattube 180g (I still have to cut it)
-headtube 40g
-dropouts 60g
-BB 20g
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Re: Berk PROTO-TYPE 3

Postby Ypsylon » Wed Jun 08, 2011 9:02 pm

Wow, the toptube is wicked light. Thanks for that.
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Re: Berk PROTO-TYPE 3

Postby ... » Wed Jun 08, 2011 9:29 pm

No problem! Yes, the toptube is one of the lightest tubes of the frame (and the seatstays cca. 40g for one). But you can't press it with you fingers like some Scott Addict, Wilier Cento, or some similar toptubes of some lighter frames. I could save some more grams on the tubing, but I prefer to make a stiff frame. Probably a Scott Addict toptube would be cca. -20g less, just my guess...


Probably a bit offtopic, but here are some interesting photos from a broken frame that I get last week..probably for most cyclist the "dream frame", but it is quite "scary" to see how is a 2000eur frame made:

BB:
Image

Seat-tube (really very thin!)
Image
I already have two friends who cracked the frame by the front dereilleur, wonder why :lol:..

Image

I can say that my frame will be much cleaner in the inside :mrgreen:..anyway, probably it is interesting for you to see the inside of some frames..
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Re: Berk PROTO-TYPE 3

Postby ... » Sun Jun 12, 2011 9:20 pm

I already managed to do the reinforcements. Still quite a lot of work to do, but anyway, here are some new photos. The surface is still "rough", without any work on the surface. I still have to add a few thin layers of epoxy and of course sand the surface etc.,... I also have to do some more work on the dropout area, I have to cut the ISP, integrate the saddle and the rear brake bridge,...anyway, let the photos talk instead of me:


During the work...

Image
For each joint I used also one layer of carbon/kevlar hybrid..

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And after the beauty layer:

Image
934 :mrgreen: it will be SUB 1000g - even with the integrated saddle!

Image

Image

Image

Image
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Re: Berk PROTO-TYPE 3

Postby skimons » Fri Jun 17, 2011 10:51 am

still very impressed... keep up the good work! nice pics, keep em coming!
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Re: Berk PROTO-TYPE 3

Postby ... » Mon Jun 20, 2011 6:45 pm

Thanks!

Some news - today I managed to prepare the surface for some more work (I have to do some more details for the cable-stops, brake-bridge,..). Later I'll add a few thin layers of resin and sand the whole surface again, to provide smooth surface and lines.

Here just one quick photo after sanding:
Image



And finally some parts for the build. I get some KCNC CB1 breakes for a very good price and I decide to give them a try.. As on the photo they are only 115g:
Image


Soon I'll get also some Sram Red parts... 8)
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Re: Berk PROTO-TYPE 3

Postby timj » Mon Jun 20, 2011 7:12 pm

I always really enjoy following your build threads. keeep up the good work!
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Re: Berk PROTO-TYPE 3

Postby mdeth1313 » Sat Jun 25, 2011 11:29 am

I've been using those kcnc brakes (same color) for 3 years now (I think- possibly longer). They work just fine for me! You can also use powercordz with them.
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Re: Berk PROTO-TYPE 3

Postby ... » Mon Jun 27, 2011 9:18 pm

I'm glad to hear that! Can't wait to test them :wink:

I just made the "base tube" for the brake-bridge. At this moment it is only 6 layers of carbon (3 different types, one of them is also carbon/kevlar hybrid..). Now I have to drill some holes and some more carbon work to do, before I glue it on the frame..

Image

It's still a bit too wide and only 3.3g for this small tube. As soon as I make some more work I'll keep you updated
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Re: Berk PROTO-TYPE 3

Postby Thomskie » Mon Jun 27, 2011 9:22 pm

Image
And me too.
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Re: Berk PROTO-TYPE 3

Postby timj » Tue Jun 28, 2011 12:37 am

Would it be possible to supply info/pics as to how you molded the carbon saddle?
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