08-17-2015, 09:34 AM
If you can't find the old style 4 foot or so metal lath covered dish for your project, consider the extra labor to build a rebar and metal lath replica using the old standard Papa-San chair design using automotive stainless hose clamps instead of tie wire.
You can use a catchment tank as your arc mandrel as an example, but be sure to put plywood "shims" along your bend route to prevent the galvanizing on the tank from getting scratched by the rebar. 1/2 inch electrical conduit bender also improvises, but have to make an arc by "nudging", or little bends spaced out uniformly to create the desired arc.
Zip tie the metal lath and clay blob "tack" your mirror pieces to adjust mirror perpendicular to focal point , then epoxy grout backfill to lock them into the lath, one row at a time for "quality control".
Hope it works out, I gather it will be steam driven?
OT, are you the one that runs a roaster with an old Dodge Power Wagon?
Community begins with Aloha
You can use a catchment tank as your arc mandrel as an example, but be sure to put plywood "shims" along your bend route to prevent the galvanizing on the tank from getting scratched by the rebar. 1/2 inch electrical conduit bender also improvises, but have to make an arc by "nudging", or little bends spaced out uniformly to create the desired arc.
Zip tie the metal lath and clay blob "tack" your mirror pieces to adjust mirror perpendicular to focal point , then epoxy grout backfill to lock them into the lath, one row at a time for "quality control".
Hope it works out, I gather it will be steam driven?
OT, are you the one that runs a roaster with an old Dodge Power Wagon?
Community begins with Aloha