9/4/2022 Design for the Hydrophone Arm

Lindsay Wright

ERAU boom arm is swing-style; we want a quick prototype that will interface with the WAM-V

Distance between the back of the spring and the handles was measured to be 53.799" in the back-and-forth (k-hat) direction, which is our estimate of the length of Embrey Riddle's hydrophone boom arm:

Pontoon height is roughly 14.416", but to be on the conservative side we will consider it as 15" (it wasn't measuring from top to very bottom as I hoped it would):

We add another 40"/1m to ensure the hydrophone is well under the surface

If we create a prototype mount similar to our T500 mount, then the minimum length of the boom arm is 58" (15+40+3 inches to account for the height taken by the mount)

This concurs with Embrey-Riddle's boom arm length

Therefore here is a prototype of a hydrophone boom based on Colin's T500 mount design.

Notes on parts:

rod is drilled .25" diameter with the intent of filling with threaded rods

Mounting plate for hydrophone: