Re: Build Log: IOM
ok so I got home and started playing the bulbs.
red line is existing fin location
green dot is the balance point of the bulb
Yellow line is fin centerline
Purple line is center line of proposed fin location
Blue line is proposed fin location
I put cantilevered both bulbs onto a scale with the fulcrum at the yellow line and the leading edge of the bulb on the scale
orange bulb displayed 30 grams
black bulb displayed a whopping 285 grams.
so I got creative and figured out a way to mount the orange bulb assembly to the Esterel in a temporary manner.
Egad... minor success. with the trim weight well aft, and the battery midships the waterline location on the bow moved 5mm lower...IE the bow went up... with the balanced bulb.
So. I'm going get the milling machine fired up and start cutting a new slot for the keel bulb. in the proposed location well forward of the balance point so the bulb is tail heav. remember I want to be able to have the trim weight and battery closer to mid ship for easier trimming.
I hate drilling and machining lead....i've broken more bits with lead... ugh...
IOM 81, 681, 881