At Last!. I have started on my car ;-) PART 2

old-git

Moderator
Points
617
From
Essex
Car
Elan & Robin Hood
New curing oven is coming along. Build cost of materials virtually nil as I am using the old oven timbers and ply. However I am upgrading the controls. The Mk1 oven used a simple, 12GBP PID temperature controller. It worked as intended but there was no way to control the speed of the temperature rise (ramp) or keep at certain temperature for a time (soak) before continuing with an increase in heat to the desired temp and holding it there before reducing temp to ambient without a lot of personal input. The new PID can be programmed to do this automatically. This will result in a better quality product.

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TCJBOLDIE

Torque King
Points
662
From
Brisbane
Car
JB Starion
There is always not enough time , space or money to do all the things we want to accomplish in life so we have to concentrate on the most important one to us and prioritize whatever matters most to you IMO
 

old-git

Moderator
Points
617
From
Essex
Car
Elan & Robin Hood
Whilst waiting for the final items to arrive for my new oven I decided experiment on how many layers of carbon I can get a way with on my doors and roof. To that end I made two samples using my small oven using one and two layers of 400gm/m2 prepreg carbon.

400gm/m2 is a little bit of a misnomer as this only refers to the fabric weight, not the resin. To get a more accurate weight you have to add around 41% to allow for the resin content, this equates to 564gm/m2.

As the doors have a surface area of around 1m2 the maths is simple :) the samples were each 0.05675m2 and weighed 36gms and 72gms, which equates to door weights of 635gms and 1270gms. They would be a tad heavier due to localised stiffening.

The single layer, however, was too flimsy and partially see through! I will go with the two layers and swallow the extra weight :) Even with excessive localised stiffening layers the doors should weigh less than 1.5kg each. OEM doors weigh around 6kg each so a 75% reduction. The roof is approx 1.5m2 so this will weigh approx 2kg as opposed to the OEM version being around 7kg. These mods will result in a weight saving of around 14kg.
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