Important things you need for buildin...

Important things you need for building the carbon frame

Posted in the Ticonderoga Forum

Since: Feb 12

San Jose, CA

#1 Jul 8, 2012
1. Frame jig - it is used to hold all parts in their exact position. I have built the frame jig from scrap wooden rods and some lathed parts and connected with screws. You can also build e.g. adjustable aluminum jig, where you can make the frame geometry according your needs. As a template of a frame dimensions for construction of a jig, I have used my [url=http://www.yoeleo.com/car bon-fiber-road-bike-frameset.h tml]Carbon Frames[/url] that I rode before. The completed jig was stiff enough and guaranteed the position and the alignment of the metal parts during the construction of the foam core.

2. Metal parts - they include an aluminum bottom bracket shell, head tube, short seat tube, cable stops, rear dropouts and a rear brake bosses. The used thin walled tubes and cable stops were made on a lathe, for the carbon frame I have purchased rear dropouts and brake bosses from the bike parts supplier. I have made them by water-jet cutting for the bamboo [url=http://www.yoeleo.com/car bon-fiber-snake-shaped-road-bi ke-frameset.html] Road Bicycle Frame[/url]. I prefer to use 7075 Alloy for the metal parts. It is good to have all aluminum parts anodized, as then you do not need to wrap a light layer of fiberglass around the aluminum tubes and part of the rear dropouts as an insulation between the aluminum and the carbon against galvanic corrosion.

3. Foam core - I have used polystyrene foam to make the core of the carbon frame. But it is better to use extruded polystyrene, or polyurethane foam, which is more rigid. Later I have used the polyurethane foam which is normally used for insulation of the outer walls of [url=http://www.yoeleo.com/car bon-fiber-cyclocross-bike-fram e.html] Cyclecross Frame[/url] buildings.

4. Materials for laminating - I have chosen a bi-directional woven carbon cloth (180 grams per square meter). I have used MGS's L285 epoxy resin with hardener 285 for laminating. For the carbon frame I used about 3.8 sq.m of the fabric, for the bamboo frame about 2.0 sq.m. You can also use uni-directional carbon for the base layers and use the [url=http://www.yoeleo.com/whe els/mtb.html] MTB Wheels[/url] bi-directional carbon just for the outer layer.

5. Supplies - I used plastic kitchen foil for covering the workbench [url=http://www.yoeleo.com/26e r-carbon-wheels-clincher-22mm- with-novatec-hubs.html] MTB Carbon Wheels[/url] during the wetting out the carbon, latex gloves, a small digital scale for weighing of the exact volume of resin and hardener, cups for mixing, paint brushes for wetting out, lots of electrical tape, sand paper and a good respirator during sanding.

Patience - the more the better

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Spike

Hudson, NY

#2 Jul 9, 2012
Great. Now you can pedal your ass somewhere else.

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