SD FD? Been told we are SD by forum experts. Confirmed by builder publications as a SD. (Of course in 1978 fuel burn was an issue and speed at a fuel cost was important perhaps classified for sales pitch purposes) Now, to view bottoms in this thread that appear to be much more fair in contour encouraging higher performance being logged in as FD and that accepted by some of those same experts who judged our boat as a SD raises ones eye brow, just saying.
Happy and content to be a SD traveling on a FD agenda. 1.25 GPH at 6.5 is acceptable.
Here is the bottom of our boat. There is no flat surface the full race of the bottom. Sharp entry, moving to a round couture surface continuing to the stern as viewed.
Bikeandboat, I'm not really clear on SD or FD . All I know is like my 42 GB 1981' the have full keel and the smaller 32 and 36 used 120 Lehmans usually a single. I think I'm lost somewhere between the two and need a MD...
The Maple Bay series - 27', 30', and 32' were marketed as as slow cruisers. I'm not going to try to suggest they were FD or SD hulls as so far I've been very wrong in my assessments. But nice little coastal cruisers they were. I only have photos of the 32. (The info says they are FD.)
Campbell River BC
I should not do this, but I will give my experience on a couple boats. Last year I was on a Grand Banks 32 with the standard 120 HP six cylinder Lehman diesel. When giving it full throttle I could feel the bow rising up. A year or so before that I was on a Krogen 42 with a single engine also and I think the same engine. When at full throttle the bow seemed to plow and "dig it", but did not attempt to rise up.
I am not saying I know this does this or this does that, but I am relaying my personal experience on these two boats.
Conrad good profile of the E32 and it looks FD. The aft bottom has a shallow buttock line but it rises all the way up to the WL. FD.
I remember the Maple Bay and definitely recall them as FD. Saw one at Point Baker in SE AK several years ago. They liked my W30 and I admired the MB. The ones I've seen were the 27 and 30'. They were powered by very small Yanmars.
I used to think hull speed was attained when the bow started to rise on a FD hulled boat. I discovered years later it happens well before that. I suspect that on most FD boats boats and on a lot of SD boats an excellent speed to run for economy w acceptable speed relationship ..... the point of bow rise as a good place to start looking for an ideal cruise speed. Just an opinion long in coming. Don't have any idea why the KK42 didn't "rise up". My Willard does.
Maybe I've never seen a NT 32 out of the water. The chine is very distinctive. Much like the old Uniflite's except softer.
Was hard to tell how big the boat was. Could have been NT 26 ish or GB 42 or even bigger. The chine was the give away but I didn't (and don't) remember seeing it.
What's really funny is that I've claimed the NT32 as my favorite boat numerous times and now realize how unfamiliar I am w it. Now that I see the arched bottom and the soft chine I like the N32 even more. I like the fact that the chine has some rocker in it aft too.
Just for the record. The prairie 29 needs to be scrubbed from the list. It is definitely an SD hull. Square and flat aft end. Horrible in a following sea and not great in a beam sea. When Atlantic acquired the molds and called it the Atlantic 30, there were a couple equipped with twin 115hp Volvos and they would achieve plane.