Venture 23 data published on C-dory website

dogon dory":2j4u5cm5 said:
So what would be the best propeller on a Venture 23?
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Dan-

Too much time on your hands? :?:

Considering this misguided leading question, the Polar Bear Hoax, and a multitude of other twisted remarks containing questionable humor often from the Dark Side :twisted:, I'd like you to consider a refreshing mental health vacation down in sunny Pensacola Florida :smiled helping Dr. Bob conduct anchor tests. With your training in Mechanical Engineering and Physics, you could shoot underwater video of the tests to accompany Bob's written results.

My sincere hope is that you would enjoy this exercise fully and then return to Fairbanks later when the sun has risen and sanity returned to the land of perpetual darkness. Or we could just get a C-Brat team together, come up there, and simply perform an exorcism. :smileo (You can always blame it on the Devil!)

Joe. :lol:
 
They have also published the Venture 26 data on the C-Dory website, don't know if I should believe the numbers now. Is it me or is 60 gallons of gas on the 26 seem a little low. We are still leaning towards the cd25.
 
Granath":qmxskwai said:
They have also published the Venture 26 data on the C-Dory website, don't know if I should believe the numbers now. Is it me or is 60 gallons of gas on the 26 seem a little low. We are still leaning towards the cd25.
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As best I remember the Cape Cruiser 26 had two 55-gallon aluminum fuel tanks in the stern for 110-gallon total capacity. I can't imagine that C-Dory would drop those to 30-gallons each.
 
Les Lampman":wow6egi9 said:
Granath":wow6egi9 said:
They have also published the Venture 26 data on the C-Dory website, don't know if I should believe the numbers now. Is it me or is 60 gallons of gas on the 26 seem a little low. We are still leaning towards the cd25.
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As best I remember the Cape Cruiser 26 had two 55-gallon aluminum fuel tanks in the stern for 110-gallon total capacity. I can't imagine that C-Dory would drop those to 30-gallons each.
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Wow! 2 55-gallon tanks!

110 gallons X 5.9 lbs/gallon = 650 lbs of gas!

+ a 370 - 480 lb engine + 2 batteries (120 lbs) = 1140 - 1250 lbs in the stern! This is over 1/2 a ton, and a full load for a half-ton pickup!

Wanna add a kicker and bracket, too? (+ 90-130 lbs.)

Looks like this is not exactly the reincarnation of the original C-Dory Classic boat concept using a 70 hp 2-cycle engine (257 lbs) and small fuel tanks that made it a light in the ends and easy to plane dory type boat! How about the following seas performance of a rear weighted boat like this?

Just some passing observations.....

Joe. :teeth :thup
 
Joe,

Don't forget that the Venture 26 is 8'6" wide. The CD 22 is less than 7' 9" at the transom.

No, this is not the original C-Dory. It is the next generation, designed by Ben Toland.

There are some CC26's powered by 200 hp motors.
 
With no experience other than the CD 22 won't comment on venture weight, but on the 22 I think they can take a lot more weight than most would think. We carried 93 gallons of fuel plus 12 gallons of clearlite for the wallas, heavy ice chest, 500 feet of extra rode, spare anchors, duel batteries, porta potty and a lot more miscellaneous stuff all in the back. Full water tanks, Honda 2000 generator and a whole lot more toward the front. Was way heavy overall with the most weight to the rear. Only once felt dangerously uncomfortable about following seas and even lighter would still have been nervous especially with towing the Mokai.

Lighter is of course better, but if safety is the concern depending on your destination and routes the extra fuel and other items could well balance the safety factor in the direction of more weight. If in doubt we find a place for it on the boat. Our cruises in the places we have been and the conditions encountered justify the extra weight and in the future we won't be trimming down from our last cruise. On whether the Venture is as adaptable as the CD 22 I have no idea, but if its even close I think the 2 55-gallons would be a positive not a negative on a purchase consideration.

Jay
 
Just checked the C-Dory website again. For the 26V they have listed two 30 gallon tanks. But I agree with Les here, it must be a misprint. It wouldn't make sense to lower the fuel capacity, especially if people are going to be running bigger motors. Is the tank on the cd25 located more towards the front area of the rear cockpit?

Michael
 
Larry H":2iifl6xc said:
AK,

Checking where you live, I would guess you are either operating in PWS or going out of Homer towards Kodiak. With those long runs and no gas stations, I agree that you need more fuel. ...
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Yeah, making long weekender runs from Whittier out to the Montague area is the plan. I've been out as far as Latouche in my 16 Angler, but didn't have a lot left for exploring and such. And currently, my Arima 17 only gets me out as far as Eshamy, or northern Knight, (the 1984 Johnson 90 mounted on the back is kind of a gas hog...).

Larry H":2iifl6xc said:
As I see it you can only increase MPG or tankage. ...
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My thinking exactly. So, when I saw the overly optimistic MPG numbers published on the C-Dory website, it really got my attention. If their numbers were true (5.2mpg w/60g tanks = 312mi), round trip range on the V23 would be just about what I was looking for (right at 100).

Larry H":2iifl6xc said:
In thinking about the Venture 23, saddle tanks seem like a good solution. Another possibility is a bladder tank in the port lazarette. Other than that, 5 gal gas cans work, but they are a hassle. ...
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I put saddle tanks on my 16 Angler to increase the range and they fit nicely under the gunnels. But I'm not sure if there is really any good spot to put saddle tanks on the V23. I think the step/fishwell would get in the way. Besides, I've gone down that road and while I'm not entirely opposed to adding tankage, I'm just not excited about it.

Hmmm... a bladder in a lazerette... any idea how much volume is in there? Might be something worth looking into, but I do like how handy they are for quick stowage on my Arima. I don't know if I want to give that up.

Anyway, that brings me back to stowing fuel cans and transferring mid trip. I have a pair of 15g cans that I use now and they work quite well. I was just hoping to clear some deck space...

Larry H":2iifl6xc said:
One last option would be to order a Venture 23 without tanks(if the factory would do that) and have custom tanks made to completely fill the area under the splashwell.
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That may be a viable option, but we were hoping to purchase one on the west coast and pilot it up here as a vacation. I suppose whomever would be doing the rigging could install a custom tank at the same time.

I'm sure I'll work it out. It's just too bad that the published specs seem to be bogus.
 
Ok, I just noticed that the published fuel data is worthless. It's the exact same chart for the V23 with twin Honda 50's as for the V26 with a single Honda 150. Obviously it was a cut-and-paste (but neglect to verify) situation. I must admit that I'm quite dissapointed.
 
Granath":22ri2mok said:
Just checked the C-Dory website again. For the 26V they have listed two 30 gallon tanks. But I agree with Les here, it must be a misprint. It wouldn't make sense to lower the fuel capacity, especially if people are going to be running bigger motors. Is the tank on the cd25 located more towards the front area of the rear cockpit?

Michael
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Michael...yes. The fuel tank in the CD25 is right behind the rear cabin bulkhead extending aft perhaps 36" or thereabouts but still well forward of the transom.
 
Our CC23 with a 135 honda & loaded does about 30 knots wide open. At cruising speeds anything more than 4 MPG would be wildly optimistic. We bought the boat used & have been happy with it thus far. We're starting the Loop in April.
 
The C Dory 25 has the fuel tank (somewhere between 100 and 110 gallons) located under the cockpit floor and foreward from about mid way to the transom, to the aft cabin bulkhead. It is definately further foreward. I also tend to keep extra batteries, etc foreward, but we do have a kicker on a transom bracket (115 lbs). Also the water tank in the CD 25 is under the V berth--taking more weight foreward.
 
Sea Wolf":jnsfzh16 said:
110 gallons X 5.9 lbs/gallon = 650 lbs of gas!
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Joe - typically gas will weigh closer to 6.5 lbs per gallon. The colder it is the more it will weigh and the warmer it is the less it will weigh per gallon. I don’t believe it will ever get warm enough to only weigh 5.9-lbs. even in California. Well maybe in Death Valley. In Alaska it will probably weigh more than 6.5-lbs. But then you can figure more miles per gallon in Alaska than in California.
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Dave dlt.gif
 
oldgrowth":1rzrohca said:
Sea Wolf":1rzrohca said:
110 gallons X 5.9 lbs/gallon = 650 lbs of gas!
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Joe - typically gas will weigh closer to 6.5 lbs per gallon. The colder it is the more it will weigh and the warmer it is the less it will weigh per gallon. I don’t believe it will ever get warm enough to only weigh 5.9-lbs. even in California. Well maybe in Death Valley. In Alaska it will probably weigh more than 6.5-lbs. But then you can figure more miles per gallon in Alaska than in California.
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Dave dlt.gif
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Dave-

Not to differ with you, but here's how I figured in my post.

A gallon of water is 128 ounces which is 8 lbs.

As a general rule of thumb, off the top of my head, gas is about 7/10 as dense as water, so .7 x 8 lbs = 5.6 lbs/per gallon for gas.

To check it out, looked it up in a table.

There, in the wonderful Metric System, I found gasoline weighs 737 kg per cubic meter, or 737 kg/ m^3. Since a cubic meter of water weighs 1000 kg, gas is 737/1000 as dense as water or has a specific gravity of .737.

Using this .737 specific gravity and knowing a gallon of water is 8 lbs, if we multiply 8 lbs by .737 we get 5.89 lbs per gallon for gas. I rounded this off to 5.9 lbs/ gallon, and could well have used 6 lbs per gallon for our purposes.

There were some caveats.

First, gasoline, like almost any other liquid, expands with temperature, so it's density will vary with temperature, as you pointed out.

Secondly, the mixture of what gas is composed of varies.

Gasoline is a mixture of hydrocarbons having 5-12 carbon atoms, such as C8H18.

Catalytic cracking adds a lot of different substances to these straight-chain molecules.

Benzene, toluene, naptha, MBTE, ethyl alcohol, and a host of others including detergent additives raise the density somewhat.

Gas delivered to the pump is formulated for the season, altitude, state regulations, and other factors that also vary its density. I did not see any density figure that approached 6.5 lbs/gallon, but didn't look beyond the table and a few other articles.

Dave- If you're getting 6.5 lbs of gasoline to the gallon, you're getting a better deal than those of us here in California! Buy gas as cold as you can get it.

Either way either 5.9, 6.0, or 6.5 lbs per gallon will give meaningful results for figuring out the weight of 110 gallons of gas that would cost about $350 at $3.15 per gallon.

My Sea Ray has a 120 gallon tank, and my marina charges $4.75/gallon, so a full tank would cost $570 for a complete fill up.

Anybody out there have a big cruiser or trawler with a 1000+ gallon tank?

Love your economical C-Dory!

That's my story and I'm stickin' to it!!!

Joe. :teeth :thup
 
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