Anyone know the fore/aft location of the center of gravity for the H40 Legend? Alternatively anybody planning on hoisting their H40 on a travelift anytime in the next few months? If the lift can record the weight on each of the straps that should be enough to calculate it.
H40 Legend center of gravity
- Thread starter apm2000
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I infer you are asking where the balance points are. The COG would be meaningless as it relates to both the X and Y axis.
The aft strap invariably goes between the keel and shaft. The fwd one lift point isn’t very critical.
The aft strap invariably goes between the keel and shaft. The fwd one lift point isn’t very critical.
Thanks, Don. Some semantics involved here I am sure. I am more familiar with engineering terms than nautical terms, but we consider COG and balance points to be synonyms. While both are a point in 3d space, I am only concerned about the fore/aft COG location (port/starboard is assumed to be centerline, vertical is not an issue for my use case). For the H40, the hull-keel interface is about 11'-8" long, at each end of this the keel slopes about 45 degrees up and away from the center of the boat. This has the effect of quite accurately locating the slings when lifting the boat on the travelift (they slide up the keel to the keel hull interface). Modern travelifts can report the weight supported by each of the slings. So if you know the precise sling location and the weight on each of the slings, then you can quite simply calculate the fore/aft COG of the boat. Therefore, if anyone here has a H40 that is going to be on a travelift anytime soon, please let me know.
Thanks!
Thanks!