In the summer of 2019, two new honeycombs were installed on the shelf of the wind flume.

The honeycomb was ordered from PLASCORE with the following parameters:
ALSLICE ALUMINUM HONEYCOMB
PCGA-XR2-1.2-1/0-30-P-3003
70 X 1524 X 2000 [mm^3]

• Perforated core
• Expanded Sheets
• XR2 corrosion coating is a chrome-free clear protective film
  • cost was 837.34 USD for two sheets, including shipment, NOT including tax.

The honeycombs were glued on to aluminum frames (80 [mm] depth) and placed in two locations:

• Upper honeycomb:
  • roughly 31 [cm] height
  • roughly 100 [cm] from wind inlet
  • tilted forward roughly 8 [deg]
  • held into place by two bolts and two 90 degree angles that were drilled into the shelf

• Lower honeycomb:
  • roughly 58 [cm] height
  • roughly 175 [cm] from wind inlet
  • has two main vertical positions:
    • straight (i.e. STR)- positioned vertically relative to water surface
    • angled (i.e. ANG)- positioned forward to roughly 8 [deg]
  • held into place by two bolts and two 90 degree angles that were drilled into the shelf

On July 16-17 2019, measurements of instantaneous water surface fluctuations were performed with the following parameter changes:

• blower frequencies (20, 30 & 40 [Hz])
• fetches (450 & 1100 [cm]) from the upper honeycomb
• vertical position of the Lower honeycomb (STR & ANG)

All measurements were performed by 3 consecutive wave gauges (WG) with a sample frequency of 80 [Hz] and measurement time of 6,000 [sec]. The surge distances between the WG were:

• 2.1 [cm] between WG1 & WG2
• 11.8 [cm] between WG2 & WG3