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Here is a wind-powered graywater evaporation device for your Burning Man camp. It will eliminate, legally and responsibly, all the wastewater produce...
A coat of varnish on wood parts will greatly extend their lifetimes. The desert is tough on wood, especially end grain and plywood edges. Your evapotr...
Aside from the nameplate (which needs tiny #4 screws) and masts (which need 1/4" bolts) everything is held together by screws of three sizes. Long sc...
Rims measuring 22-1/2" across are for 24" wheels; rims 25-1/2" across are for 26" and 27" wheels. You can use a mix of wheel sizes, but the two wheel...
The wheel for the propeller must be a rear wheel, with a hub that's either threaded (left wheel in picture) or carrying a freehub (right wheel in pict...
You will need these common tools for construction: Drill, ideally a cordless variable-speed reversible drill. Twist drill bits up to 1/4", a...
matte or satin finish water-based exterior polyurethane varnish. paintbrush. masking tape, white or blue. (These instructions call it "bl...
Summary: Cut 1/2" plywood into three trapezoids (corners trimmed) and four rectangles. Cut 2x4's for tray frame. Cut 1/4" plywood for tra...
Materials: 2x4's, eight 3" screws. Using the 1/4" plywood tray floor as a work surface, arrange the frame 2x4's with end (29") pieces inside the side...
Check each corner for squareness. Attaching the tray floor in Step 10 will correct minor skews, but if a mild push won't square up a corner, loosen th...
Materials: four builder's shims, about 16" long. Arrow stapler. about thirty medium screws. #6 countersink bit, or 3/32" and 9/64" bi...
Summary: Drill bolt holes in two trapezoids, and mount them to the tray and masts. Materials: two 1/2" plywood trapezoids (gussets for masts). ...
Summary: In each angle bracket, drill or widen one hole for an axle and enlarge two holes for screws or bolts. Materials: one Simpson GA2 and tw...
Materials: Propeller arm trapezoid. GA2 angle bracket. two 1"-long carriage bolts, either 3/16" or 1/4", and two nuts. two medium scr...
Summary: Mark contact points and mount wheels on masts. Materials: two bicycle wheels. The wheels must have the same diameter. two Simpson ...
Summary: Cut a 1" length of 1-1/4 ID PVC pipe, for the pulley groove. Cut another length, 21-3/4" long, for the drum axle. Discard any scrap. 2-1/2...
Summary: Using polypro twine and zip ties, run diagonal bracing to make the drum rigid. Materials: 25 ft of polypro twine. blue tape. ...
Summary: Build support for the drum surface by lacing twine zigzag. Materials: 50 ft of polypro twine. Double the twine end over about 6 inches...
Summary: Add a tulle bulge and cover lacing with tulle. Materials: Tulle, 2-1/2 yards, from a fabric store. 10 mini zip ties. Now you nee...
Materials: 1" length of 1-1/4" PVC pipe. Alcohol. Paper towel. 5-1/4" of 1"-width 3M gray nonslip tape. One CD. A plastic bot...
Materials: one rear bike wheel and one extra axle nut or a quick-release skewer and nut. Choose step 21 or 22 according to the type of hub: thre...
Materials: pulley groove (1" pipe) outer and inner flanges. 20-gauge bare copper wire, 9". Gorilla glue and applicator such as a coff...
Materials: 1" piece of 1-1/4" PVC pipe two flanges 16-gauge bare copper wire, 12" Cut three 3-1/2" lengths of bare 16-gauge copper wire,...
Materials: card stock (manila folder) or thin cardboard (cereal box) Wheel sizes, spoke numbers, and spoke patterns vary. The exact layout desc...
Materials: trial blade. bike wheel with pulley wheel mounted. aluminum sheet, enough for five 9"x12" or 8"x12" pieces. A roll of aluminum...
Stack the blades with the template blade on top, clamp them with at least two clamps, and drill 1/8" holes through the stack. Mount the blades on the ...
Materials: 2-3 ft 12- or 14-gauge copper wire, bare or insulated. blue tape. Mount the propeller on the arm. Is it balanced? If not, some co...
Materials: Four nylon stockings or legs from sheer panty-hose The drive belt is made of four nylon stockings or sheer panty-hose legs, tied together ...
You now have a working Gray-B-Gon evapotron, except for the plastic sheet tray liner and the bucket filter. Install those after you get to the playa. ...
Summary: Insert bolts in tray, place plastic liner in tray, mount masts and staples on tray. Push the gusset carriage bolts through tray sides from t...
A friend is a help here. Set up the drum apart from the tray. Reaching between the spokes of the near wheel, place the square-cut end of the long ax...
The five-gallon plastic bucket with holes will house the water filter. Set the bucket on the fabric scrap, which protects the plastic sheet. To tether...
Graywater is inherently unsanitary. It may contain bacteria, fungi, viruses, or other life. To disinfect graywater, and avoid funky aromas, mix in Clo...
High wind will blow water from the drum in droplets and distribute it downwind for several feet. This isn't always undesirable -- the BLM considers t...
So it's Monday after the Temple burn, and you're packing up. Your Gray-B-Gon evapotron, having chewed through fifty to a hundred gallons of wastewate...
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