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ContinuousWave: The Whaler GAM or General Area
speed? or not to speed?
|Author||Topic: speed? or not to speed?|
posted 03-21-2002 08:26 PM ET (US)
curious, what is the maximum speed rating recommended by BW for a classic 16' hull?
posted 03-21-2002 08:45 PM ET (US)
Max HP rating is 100. Speed depends on load and setup. 40-45 mph is a number I've seen claimed. I have 100hp and I can't see wanting any more, its more than enough. I'm going to have to get myself a GPS and find out what it really does.
posted 03-21-2002 10:29 PM ET (US)
I have a classic 16 hull with an Evinrude 70 on it . Top speed is a little over 25. I usually can't go even that fast but quite a few times I wish it was a little more.... But a lot of older guys here (west) coast fish classic 16 with 50 hp.
posted 03-21-2002 10:40 PM ET (US)
Thanks for the reply. I have an '84 Johnson 140 "Looper" on my boat only because it came that way. I know that it is overkill, but the older gentleman that I purchased the boat from put it on in '84. When I tested the boat, we checked the GPS and coasting @ 52 was comfortable. I'm just wondering what speed would be too much for the hull not that I'm wanting to go any faster. I just don't want to push it! In the future, I would like to re-power the boat with a F-100 Yamaha 4-stroke so that I am legal to tourny fish and meet proper CGR's.
posted 03-21-2002 10:43 PM ET (US)
With a 70hp it does a little over 25mph?? I use to use a soggy floored, very waterlogged 16 with a beat up 40hp evinrude that did 28.6 mph on my magellan with me and a full 6 gallons of fuel. Whenever I toke a walk to the bow the floor under me would sink about an inch and water would squirt out the deck.
You better get that 70 checked buddy, I can just imagine the fuel your wasting.
Oh and a 16' whaler isn't design to be ran over 45mph.-EasyE
posted 03-22-2002 02:21 AM ET (US)
For 11 years I ran my 1971 Nauset with a 1973 Merc in-line 6 150HP (powerhead rated in those days) engine. It would run about 55mph, which is about the limit for the hull if you ask me. But it would handle it, as long as you were VERY careful.
posted 03-22-2002 09:48 AM ET (US)
I saw a 17 montauk with a 175 Merc black max on a trailer......yeah baby!
posted 03-22-2002 10:48 AM ET (US)
It is simple, more horses means more torque (dejavu). More torque allows for a higher pitched prop, and higher pitch allows for faster speed. Then there is drag which is a factor of hull shape, weight... I guess if you put on a 200 or 250 hp engine, if it is not too heavy, and didn't accelerate too fast, you could probably get away with a really large pitch and fly like one of those bass boats.
posted 03-22-2002 11:42 AM ET (US)
Not in a Montauk. Everyhull has a top speed and after that you literally have to double the Hp to get maybe 10mph. A montauk with a 100 can hit say 48. Double that to 200hp and you might get the 10mph.
A montauk with a 50 does 35mph, double that and you get the 10mph, etc.
posted 03-22-2002 11:58 AM ET (US)
You are right on the money. My Montauk with a Merc 50/4stk does 33. If I left the wife, dog and a lot of other crap at home I probably could hit 35.
posted 03-22-2002 01:04 PM ET (US)
You bring a wife on your boat? That is a major disregard for maritime law:)
posted 03-30-2002 02:44 PM ET (US)
Bigshot: you should further tell these speedsters that a Montauk with a ninety is dangerous-a sharp turn at 40 can cut a sponson and she will flip like a Volvo without a roll cage, f
posted 03-30-2002 05:29 PM ET (US)
When you use enough ballast (aka operator), you don't worry about going too fast with the 90, but you don't have to worry about getting up on plane.
Besides for us old folk, the extra ponies are not used for speed, but just in case we need it. The ninety allows for nice comfortable cruising at 4000 RPM.
posted 03-31-2002 01:11 AM ET (US)
How fast should a 67 sakonett with a johnson 85 hp go???
posted 04-01-2002 09:51 AM ET (US)
It should do about 38-40....what it does is another question.
posted 04-01-2002 10:59 AM ET (US)
Just for clarification....planning hulls themselves don't have a maximum speed but is limited only by aerodymamics (AKA wind resistance).
Wind resistance squares for every 10 mph increase. It's been awhile since I've had this discussion but if memory serves me ok I'm not too far off.
So I think this is similar to what was referred to here. To increase speed (relative to wind resistance) does require more hp than one might think, as is evident by the information stated above.
posted 04-01-2002 08:35 PM ET (US)
I run a 100 4-stroke on my '72 16ft. It's heavy and soggy with large fuel tank in front of the console that cramps the boat's style at WOT. With that: 41 mph, but I need a little chop to get that speed. In glassy water, I get about 38 mph.
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