SA_AL forum posts in last 60 days

moosh said..






Do you have my pictures you can share?

I wasn't happy with the flexing of my Slingshot Phantasm carbon mast, so I decided switching to the 84 cm Forged Cedrus. Today was my first session with it, using a large 2200 foil on a light?wind day. I'm 210 lbs, and I didn't feel any flex or vibration at all-so on that front, I'm really satisfied. I did notice a pretty distinct humming at certain speeds. From what I've learned, the pitch and intensity can change depending on depth, speed, and the type of foil you're using. I was also told that adding a pad between the mast base and the board can help reduce the noise.
Following is from Cedrus Website "My mast whistles and hums at certain speeds, is this normal?

We have found through months of testing that certain foils can produce acoustic and haptic feedback when paired with Evolution Aluminum. Due to the thin walls, high stiffness, and hollow channel that does not fill with water, the mast can transmit whistles and hums at specific frequencies with certain foils. We have learned to appreciate this feedback, and found that it can be mitigated by changing ride height, angle to weather, speed, or wing loading. Rider weight, board size, and other variables like water density can affect the response. It is a complex system dynamic. All other aluminum masts are held together by screws, mounts, and doodads, and typically fill with water, and will therefore not transmit vibrations or acoustic energy. You can try a thin rubber pad between the board and mast to reduce the noise level"