fast question for you all

[Robert]

Okay this weekend was great out on the water with my friend. She got a nice sun burn and I got to relax finaly.. However I did notice that the keel cable does make a lot more and alot louder of a hum than I am use to from my O'day that I had. For a while I thought I was in a bad remake of a jaws movie from the force of the boat surging forward from the waves. lol So my question is how loud should it be?? and should it be constent? Also what is her hull speed? had her about 5.5 knts Sunday Not sure if that is a good speed for her or not. Hope to hear back from some of you.. Tkans againRobert sv Reserrection

 

[Brad]

Cable Humming is Good Music!

Robert,First, you didn't indicate which model boat you have.Second, for a C-22 to hum is a good thing...the louder the better. What this usually means is that you are approaching hull speed and going fast. 5.5 knots is great speed for a C-22!Third, you can loosing the cable a bit to reduce the humming but then you get a slack cable creating more drag (not to mention the possibility of snagging something). So, a fully extended keel with a snug cable is preferred for performance.Cable hum is a fact of life with a swing keel. Enjoy the music!Brad.

 

[Tim Pinkham]

Hull Speed

Robert,I believe the formula for determiningtheoretical hull speed is:1.3 X the square root of the length along the waterline. This would putyou in the high fives or low sixes.So you may get her going a little faster but not much.Have fun!Tim Pinkham~June E II~ (frozen in the backyard)

 

[Aldo]

We're Envious

Brad: We always loosen our keel winch handle one or two turns to stop the humming. You know all of us are envious of you being able to sail now. We're suppose to get freezing rain tomorrow. I also thought the the calculation for hull speed for a C-22 put it in the low 6s. This past summer, we had plenty of wind and plenty of sail, and had our boat around or over 6 knots for several hours running down wind. We measured this speed with a GPS, but I really don't know if there was any current. A GPS measures ground speed. I have experienced the boat surfing down waves before, and I think it might be able to exceed the theoretical hull speed when it's surfing. We were sailing on the Chesapeake, sailing to Solomons Island on the Patuxent River. Aldo

 

[David Bergevin]

Theoretical hull speed

I beleive that based on the published waterline length ( which will vary as the boat heels ) the "theoretical hull speed is 5.89 knots you may want to convert that to mph if using a GPS. The GPS measures over the groung not through the water, BIG difference.Now for the brag part. I did a 45 mile Miami to Key Largo race in my '84 C22 in the mid 1980's and did it in 5 1/2 hours. You do the math. Broad reach the whole way with absolutely no response from the tiller. Talk about WILD!!!

 

[Jeff]

Try putting some slack in the cable

I've heard that if you play out the winch cable a little furthers the slack in the cable will reduce or eliminate the humming. As for the speed, I'll leave it to someone else. -jeff

 

[Robert]

Thank you all

I thank you all for your helpful information. I will try out the things that you all said to try. Am heading out in the morning to see what the weather has to offer. I am praying that it will be like last saterday. I think that i freaked out half the people on the water, had the autopilot on and was riding the bow with full sails up and no one atthe helm. Still mad at the powerboaters though, to many dang wakes that are to dang big and to dang close to my boat. ooh well. and I am still looking for information as to where to find a paten for the pop top cover for my 1978 catalina 25 so please if you know where i can get it let me know.. well thats it for now take care all. Robert. sv Resurrection.