wooden Eddie option: cut 2"x4" mast to 44" (although there is an SMCC variation called the "Tall Lauren" that has longer mast)
aluminum Irina option: we once cut the 1"x1"-square pipe at 60" but now we leave it at 72"
3'' mast option: leave the 3"-diameter bamboo as 48"
star-shape frame option: one 73'' length bamboo as mast and two 58'' length bamboo as spars
Drilling spar holes in the mast
If making a lot of drifters, it may save you time to build a jig for this step
spar hole diameter depends on model:
wooden Eddie option: 5/8" if using oak dowels
bamboo 3" mast option: 1" for 1" bamboo
aluminum Irina option: 3/8" for solid high-strength-aluminum rods (some have used stainless steel)
>drill a spar hole 1" on center from the bottom of the mast (1.5" in the bamboo case)
Drill a second hole 37" (on center) from the bottom of the mast (37.5 in the bamboo case)
Rotate mast 90° and drill a second set of holes 2" (on center) higher than the first set
Note:fiberglass Megan option: 12mm for "MEGA" heavy-duty driveway markers (15/32" drill bit is almost right) Note:There is no spar holes in the bamboo star-shape frame drifter. Note:We have used 3/8" fiberglass dowels in place of wooden, bamboo, or aluminum. None of these will survive being washed ashore on a rocky beach with surf.
Label the body of the drifter w/ basic information
Print out & laminate labels that include:
Phone # to call
"Science" or "Drift Study"
Tape, pin, glue, or stencil these to the 4 sides of the mast.
Figure 1. Stenciling information on drifter mast
Note:The jig helps to place your spar holes more accurately. Note:If a set of sails are already made, make sure your sails fit before you drill all your holes in the mast. Note:It is not essential to label the drifter with the "deployment id" since it is often not known ahead of time.