Max Transom Rating

[Waterball]

I have an 1981 CD22 Classic and am wondering if anyone knows the max transom rating or where I could find this info for insurance purposes.

[Larry H]

Waterball,

I don't know where to find that info, but Greg(Red Fox) had a 140 hp Johnson 2-stroke and now has a 115 Yamaha 4-stroke on his 22 Classic so I would guess that the transom is strong enough.

The USCG doesn't require boats over 20 feet to have a maximum hp plate. My 1991 22 cruiser has a plate which says recommended hp is 70 and 90 hp is the recommended maximum .

I saw a 22 Classic in Canada with a Honda 90 and it was used to haul freight and passengers to a remote resort.

[Jon - CLou]

My 1986 Angler has the original data sticker on it . It reads the same as Nancy H, recommend 70 hp and 90 max. Anything over 90 h.p. will void warranty.

I repowered with a 90hp Honda and I'm very happy with it.

[C-Bill]

I would give my personal thoughts, which may be considered "mean," so I won't.

Instead, I will quote an article in the Nov. 1989 issue of Small Boats Journal. On page 20 there is an article titled "Outboard Cabin Dories." In a side panel is an article about "C-Dory Origins." From C-Dory origins I'd like to quote a paragraph or two from the designer & builders of the C-Dory.

[Waterball]

Could someone direct me to the location of the data plate? Is it near the haul number? Thanks in advance. No offense taken C-Bill
Shaun

[Sea Wolf]

Shaun-

This is one of those things that may change a little with the age of the boat. My "87 Cruiser has a paper yellow tag printed in black at the helm between the wheel housing and the electrical panel to the starboard side.

When I was first considering different motor options with one of the factory folks a couple of years ago, I was told they could "recertify" my boat for 100 hp (it has the 90 max, 70 recommended message on it) by simply sending me a new sticker.

C-Bill-

I firmly agree with your input about the weight forward issue. Within limits, it really helps hold the bow down into the chop without having to use motor trim or trim tabs, which waste energy on trim.

Joe.

[C-Bill]

Joe,

The only reason I went to a two stroke 90 hp on my boat is because I was primarily intending to use my boat at high altitude lakes such as Lake Tahoe, Donner, Pyramid, Boca and the like. At this altitude a two stroke will lose up to 30% of it's HP depending upon the temperature.

The data I presented from Roy & Mark Toland is very specific to dory and semi-displacement boats. It is the basic's from which Naval Architect's determine load and performance.

It's kinda like messing with Mother Nature. Ultimately, there will be a price to pay. The performance of boats is very similar to that of aircraft. When you load all the heavy people in the back of the airplane, it will get off the ground, but it won't fly very far! Yes, I have a pilots lic.

I've tried to post the entire article in the Brats album and can't get it done. I suspect the firewall in my computer.

Bill

Sorry Waterball. I suspected an attempt to push that sled to the MAX!

[Sea Wolf]

Bill-

Nice hearing from you again! Wasn't questioning any thing your wrote or did, just agreeing with the text message.

How's your planning going on the trip to the west side of Vancover Island?

Joe.

[Sawdust]

You KNEW I'd leap on this one!!

We are very fortunate that the dory shape will handle weight so well.

The metacenter and its relationship to other forces measure the staibility of our favorite boats. Many, many ways to determine this (Charlie, HELP) -- it's a full time profession for a lot of geeks.

Mark T. meant it what he wrote "...to have a slightly bow down trim when at rest in the water." In the late 70's I lived less than a 10 minute walk from the CDory plant -- good coffee, good BS, and many stability discusions. The 22, with a light weight two-stroke, is a beautifully balanced boat. Easily planes at 9-10 knots, very economical cruise at 14-15 knots, nice cruise at 20 knots, with a top speed of 29 knots. 5 NMPG ain't all bad.

Doesn't mean a heavy 4-stroke and heavy kicker, or two 4-strokes, won't do a great job. I've been both ways, and they all work fine. One of the problems of just adding weight forward to offset the heavy aft load is the "hobby horse" effect, so weight distribultion becomes a factor.

El and Bill, with their jillion miles of cruising, have boat loading down to a science, and I'd certainly use any knowledge they are willing to share for planing any long trip.

Red Fox loads very heavily -- and it certainly works for him. He boats in heavy water, is a very experienced skipper, and goes places most of us like to read about, look at the beautiful pictures -- and won't go.

Only load as heavily as you must, distribute your load so you are slightly bow down at rest -- have fun!!

Dusty

[Captains Cat]

Dusty, are you calling me a GEEK???

Been a long time since I did stability calculations, has something to do with furlongs per fortnight or some such thing. I do know that my 94 CD 22 is a bit down by the bow at rest, so much so that the water that falls in the cockpit runs through the little hole in the cabin door bulkhead and gets my throw rug wet! UGH. I don't have that mid ships bilge pump and sump that some have so I have plugged that hole with a rubber stopper.

Heavy is good, even or slight bow down trim is good, no list when moving slowly and loaded is good. I'll do the calculations when I can find my books but with this flat bottom and beam, the righting arm we have (the tendency of the craft to right itself from a hard roll) is pretty large.

I have rolled over 50 degrees on a destroyer and had my doubts that it would come back but it did! We lost all our boats, topside ladders, broke many porthole glasses took green water over the bridge and bridge wings and lost the fiberglass housing over the 5"-54 Cal Gun. Never want to do that again. Firmly believe in low, fixed weight. Full water tank, fuel tanks, tools kept low in storage, etc all help. Don't move around in heavy weather but if you have to, hold on firmly (and not to the table). Install those overhead grab rails, I have a crewmember with a broken ankle that wishes I'd had them two years ago!

Charlie

[Sawdust]

Charlie!

50 degrees as in fiyive zero?

Now THAT's a ride.

We're lucky to have these little guys with so much built-in stability. Like you, I like everything low and sometimes wish the stinkin' grab rails were on the cabin sole... doing some unofficial stability testing last week and went broadside on a crest. Everything was tied down, so not a worry because these little guys are sooo nicely balanced. Securely stowed is danged important and doesn't get enough emphasis. When you are on beams end and get a sudden weight shift unpleasantness can surely develop.

BTW I was a witness to one when the three DD's turned turtle when they were pumped out for refueling in a typhoon.

I'm a coward so DD's ain't my style.

Dusty

[Little Catelyn]

Thanks Sawdust and C-Bill for shedding some light on the weight distribution issue -- glad I kept up with this topic.

There have been many threads on this board that discuss the benefits of a heavier engine(s) to provide added weight astern in a following sea, and then the need for trim tabs to keep the bow down heading into chop. While this seems to conflict with Toland's comments, it appears to work for many on this board. Hmmm?

I've always felt that a heavy engine seemed counter-productive, but then I don't have the experience or knowledge of these boats to make an educated opinion. Heck, I don't even have a C-Dory, yet... But I have ordered a 22' cruiser with one of those new E-Tec 90's. I don't know how the E-Tec's weight compares with some of the older 2-strokes. Will this engine be too heavy to have the bow down at rest? I like the fact that the E-Tec is lighter than many of the new engines -- if I do need more weight back there I could always add a sand bag or two; easier than finding that you wished you purchased a lighter engine!

Corwin

[Sawdust]

Corwin,

You are absolutely 100 percent welcome to come to Cornet Bay and run my 22 with the E-Tec - or come ride with me in the pass with outgoing current against the wind. Sporty and interesting.

Charlie (that old goat on the other coast) is spot on. The dory hull will take the weight as long as you can adjust your on-board weight so you are a bit bow down in the water. I have trim tabs, but run with them up most of the time because they are extra drag. Trimming down when driving into a heavy chop makes them worth the install, and of course they are good for lateral trim too.

Dusty -- gotta go BBQ the ling.

[Little Catelyn]

Dusty,

Wow! I'ld LOVE to just doesn't seem to say enough! Thank you for such a gracious offer. Please send me a PM when I could join you, or just to exchange phone numbers.

I haven't heard anything lately, but if my boat hasn't fallen behind again I would expect her to be ready for shipment to E.Q. sometime after the middle of this month. Well, a guy can hope...

Some time ago, Les told me that not only hulls, but trailers, outboards and electronics might be in short supply. I was hoping to avoid the trailer purchase, but think that I will probably need the outboard. Like several awaiting new arrivals, I too have ordered the C-80. If it works out that I take delivery before electronics are installed, what could/should I do? Hopefully, I can live without radar for a little while. And I might manage without a chartplotter and GPS for a little while. Wouldn't want to find out that I should have waited for a depth sounder. Guess I should start shopping for one of those backup compasses that has a suction-cup mount -- well, I'll use it for a backup later.

Thanks again,
Corwin

[Captains Cat]