There was a discussion on another forum about rolling chocks for power boats, and this "staggered" design was brought up, as opposed to a...
Does anyone have any knowledge of these Japanese medium speed engines? Any opinion if 23,000 hours (assume properly maintained) would be the...
For a new construction fiberglass boat, trying to watch budget, would it be sufficient for long term blister protection to rely on an upgraded...
I'm flying to Istanbul next week to visit a designer/shipyard regarding construction of a steel trawler. Semi-custom, it would be an adaptation of...
My question is whether there is truly any discernable difference in drag and fuel economy between a blunt versus a faired propellor post, for a...
I'm using Gerr Elements of Boat Strength as a guideline. Reference to the laminate thicknesses specified on stringers and engine beds, it is...
What are typical and reasonable payment breakdowns for a new design/construction? It looks like we are agreeing on the following, but haven't a...
How much are "standard" fiberglass layups (polyester or vinylester resins) affected by low winter temperatures where water is easily 30-32F and...
Is there an issue with adding layers of epoxy-saturated fiberglass with typical resin-saturated cloths? Or perhaps reinforcing layers of kevlar...
In general, if a vessel design has always been classed by an IACS society with a navigation notation of "coastal area" and then the designer...
Typically what sort of safety factor do NA's work to when designing different parts of a vessel. Like the deckhouse, pilothouse, hull, etc.?
A few questions regarding the fuel-propellor curve. Few manufacturers provide this curve so is it calculated using the same formula for the prop...
Since the main advantage of vinylester resin is its resistance to moisture (avoiding blistering), would it be acceptable to use it below the...
When deciding where to draw the chines in with a multi-chine bottom on a small boat, does one generally try to take into account the streamlines...
(Although this thread is related to the one about fiberglass hull scantlings for a longliner, I thought a new thread was warranted) Can anyone...
I've surmised that most shipyards that I've had discussions with and also the propellor manufacturers must all be using Gerr or a derivative...
Following is a summary of the layup schedule for a 70ft X 14ft X 5ft, 56 ton longliner. The vessel is long and lean with moderate D/L, but the...
Is there an accurate way to estimate the the displacement (at DWL) of a monohull trawler with the following dimensions? Length overall 13.85...
I am in design stage for my trawler which has relatively low freeboard. The forward cabins are designed with oval portholes 16"x9" are are about...
How applicable is Brewer's MCR for power boats, as an indication of ease of motion? My trawler is computing at over 100 points (with a roll period...