First, thanks for the quick response(s). I've been pulling some information provided from the designer of the Al version of the Hickman with the inverted V running to transom. He does confirm it is a Hickman hull with the modification in question. The guides who have bought and used this hull report, repeatedly, that is will get up and run in the same depth of water as it sits, and reports range from 5"-7" when loaded.
I do understand your contention that the air pocket created by the Inverted V will raise the boat a bit in the water column on plane/at speed, but that would make it run skinnier (inch or two I would guess) than a standard V hull, but I don't see how the physics indicates that it would run skinnier than this modified version. At rest, there is no doubt the TX18 will sit in the water with less draft, as there is simply more displacement. But running, the Inverted V to transom will deliver water to a prop positioned higher than the TX18, as with the TX18, the prop still has to be positioned nearly parallel to the transom bottom itself. This modification, I'm almost certain, would still provide the air pocket and some rise, as this phenomenon is generated from the fore section of the hull back to the point where it touches the water, underway, and that doesn't change much with this modification.
The static draft is not in question here. The hole shot depth and running depth is the concern. My guess is that the TX18 will get up and run in 10"-12" of water. With this modification of running the IV to transom, it appears we can get the TX18 running in 5"-7" less water. That is a very significant difference in flats/back lake fishing. And one I think many would appreciate!! I, for one, have held off on building this boat for five years because of the concern about running depth.
Here are some of the quotes from the designer of the modified Aluminum version that runs the Inverted Vee to transom. The guides who have chimed in on this boat and have run it in application corroborate. I'm hopeful this will provide some indication that offering this modification could provide a very tangible benefit in running depth and hole shot depth requirements.
QUOTES FROM AL HICKMAN VERSION DESIGNER:
This is the inverted vee hull, based upon the original Albert Hickman design, but, redesigned for the Laguna by carrying the vee completely through the hull. In 1914 when Hickman first developed the hull there were no outboards and he made the transom area flat-bottomed to carry the extra weight of the engine and transmission.
Since I own the Laguna Tiger and built it I thought I might help you out with some facts. The boat is 18' X 8' beam, weighs 520 #, runs 40 mph with 2 people on it. 90 hp Yamaha power. It's all welded aluminum as this is the first one and it would have been much less expensive to build it out of aluminum instead of having to make a plug and then a mold to build in glass. The only other option would be plywood and that would still really be just a plug as far as I am concerned. I took the boat to Corpus two weeks ago for initial testing, it was really great, much better than expected actually. With a 20 mph SE wind, we, three people, took it into CC Bay, i ran the boat at all possible angles to the waves, even to the point of turning it around at 3500 rpm in a small circle.
Resulting in NO pounding and NO spray in the boat. Albert Hickman's #1 claim was always that his "Sea Sleds" never, ever pounded in rough seas. Neither does my version, it is spooky smooth and dry. I took several area Charter Captains riding on it and to a man they said it was the best ride they had ever experienced, bar none.
While the boat that i saw pictured on this site, the TX18, that is a kit boat that has similar vee design, but, it is a flat-bottom-transom design very close to Hickman's original drawings. It will work, but, does not run well in shallow water as the engine will overheat if you try to run shallow. It has no way to feed water up to a raised engine like mine does. I had several options when thinking about my design, I could either build it flat as Hickman did, put in a tunnel as most S TX flats have, or, get creative and run the inverted vee design completely though the hull and use that as a tunnel. i decided on number three as it made the boat more unique and I liked to idea of extending the inverted vee through to try and capture even more of the air-cushion ride. It worked...If you would like more info jsut email me with a regular email address and I will forward all of the details to you.
NO sneezing. we put a sneeze-bar under the bow to prevent that just in case. Don't know if it worked, or, if it just hasen't done it, but, it never has sneezed.
Here's a few spec's that I know to be facts from the week's testing that I have already done if it.
Length = 18'
Beam = 8'
weight = 520 lbs. bare hull weight
draft / loaded = 7"
draft w/1 person on front deck = 5.5" hull levels out with one person on the front
draft w/2 perons in front of console = 6"
draft w/3 persons scattered front to rear = 7"
hole shot = very good, instant, will get up with jack plate all the way up.
runs = very shallow, whatever it takes to feed enough water to the prop to push the boat, i would guess 4"??? The prop is up in the vee, about the bottom of the boat when running with the [jack plate] up.
Turns = like a sports car, no slippage at all, very positive, very solid feel.
ride = soft, NO pounding just as hickman advertised in 1914
dry = spooky, NO spray in the boat to-date, even trying to hit waves at crazy angles to make it spray. Spooky how dry it is.
stable = 2" of list with 600 lbs on either gunnel
Thanks for taking the time to look into this modification further!