[757labs] solar project
snelson at webapper.com
Sat Jul 23 22:21:04 EDT 2011
Beau and I are in here now trying out an idea I had this afternoon. My idea
is to start with a rectangular PVC frame slightly larger than the mylar.
It's 51 1/2" X 71" The mylar is 48" X 68" We put 14 grommets all around the
mylar and put zip ties attaching the mylar to the PVC. Now we have a flat
mirror without any wrinkles. I'm about to drill a few holes in the pvc and
bend the shorter pipes which will cause it to bend in a semi-circle shape,
then string wires through the holes pulling it into a parabola. The math for
where to put the holes is a little bit tricky, but I almost have it figured
This will be my backup reflector.
On Sat, Jul 23, 2011 at 9:33 PM, <telmnstr at 757.org> wrote:
> We attached the mylar the other day. It's on there but I think there are
>> many wrinkles to put out good amount of heat. I have some new design ideas
>> I'm going to try, but I'm going to test it first before I rip it apart.
>> I think I'm going to do the first test on Monday afternoon, weather
>> permitting. Out in the parking lot. Hopefully I won't get yelled at by
>> anyway. My plan is to just carry it out there, fill it up with roughly 1/4
>> gallon of water put a thermometer in there and see what happens.
> I can swing by on Monday to assist! I don't think there will be any issue
> from the building people.
> I was trying to think of a more solid way to mount the mylar, but I didn't
> come up with anything short of bonding it to some sort of piece of plastic?
> 757labs mailing list
> 757labs at 757labs.org
> If we knew what we were doing it wouldn't be research.
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