Search results

In a recent post on VHF " Antenna: Height or Gain" I posted: "Calculation for Range of an Antenna: Square Root of Height (in feet) above water x 1.42 = Range in miles Remember to perform the calculation for BOTH vessels, and then add the results for the range between two vessels..." Isn't...

If you've run in fog, you're sure to have encountered some interesting situations. I'll mention two to get started. Perhaps the most unusual one was in Long Island Sound just off the Connecticut River breakwaters. There is channel south east of Long Sand Shoal where many transiting boats pass...

Speed With Larger Engines What speed can you expect with larger engines? I found the following really interesting: In June, 2005 SCROD posted: (And thank you for the post!!) Here's a rough guide for horsepower to speed ratios for planing hulls with moderate deadrise 12-18 deg. 180 divided by...

The nearby antenna post caused me to check the Shakespeare website. I've never read about antennas before but found the following: "Calculation for Range of an Antenna: Square Root of Height (in feet) above water x 1.42 = Range in miles Remember to perform the calculation for BOTH vessels...

For those interested in the gory details of DD maintenance, SIB's for all engines may be found at. This is more than I need to know, but can be a good resource. http://www.detroitdiesel.com/public/sibs/sibnav.asp

Following are two excerpts from the current (2004) DD Lube oil and fuel specs. "In some applications, such as marine and power generation, engine crankcase vapors are routed into the air intake system. Some multigrade engine oil formulations have a tendency to generate vapors that condense on...

Anybody know the relative fuel efficiency of turbo engines vs NA engines at a modest HP output? For example, say it takes 150 HP per engine to move a Hatteras at some modest cruise speed. Is an 8V71 (rated 350 HP) more efficient or less efficient than an 8V71TI (rated at 435 HP). Or are they...

Am interested in what designation standard injectors are for the 1970's vintage 435 HP models. Are they "M60's"?? These can be replaced with larger size, along with a few other modifications, for increased HP. Anybody have this done? What are the changes and results? A 46 Bertram had this...

Here's a trick I learned during a gale force wind test when I first got my 1972 yachtfish. Seas were on the stern, 6 to 8 feet and steep on Long Island Sound. I was really impressed the way the old girl handled even though the flybridge height above the water created a good amount of motion. She...

My 1972 48 ft Yachtfish has flexible fuel lines between the engines and the tanki selection valve manifold under the cockpit floor. These appear to be high pressure lines having wire mesh embedded in the neoprene (or whatever). Both supply and return lines are flexible. Were Hatteras fuel lines...

Anybody know of a device to detect excessive lube oil filter oil bypass? I read something that implied such a device exists. It could be useful aboard in the event a full flow lube oil filter clogs unexpectdly and all the oil is diverted via the bypass pressure mechanism.

A baldwin filter engineer cautions that in rare instances draining engine lube oil and refilling the crankcase with clean oil can cause an oil pump to lose prime. See details if interested at http://www.baldwinfilter.com/engineer/pdf/93-1.pdf. To avoid this potential, drain and refill your...

What's been the experience of owners with flo scans and prop scans. Does the computer scanning of props ACTUALLY get reflected in any improved efficiency?? I'm not talking an old wobbly prop out of aligned and vibrating, but a comparison between one working reasonably well then computer scanned.

About three years ago my 1972 12KW ONAN would not turn over at attempted start. I smelled that burnt phenolic aroma we all fear, and traced the smell to the control box where I found the RESET BUTTON insides burned. This is the red button labelled "RESET" on the outside of the control box on the...

For anyone interested in making their own hardtop you see can my effort at http://groups.msn.com/TrawlerMV/lazydays.msnw, photo # 1 (distant view) and #3, a close up. I used four sheets of 7/32" thick marine plywood because I needed 4 x 10ft pieces (that was all I could find) and reused the...

Here's how to make a durable anchor pulpit. It's time consuming, but inexpensive. Cost is no more than $150 plus a roller or stainless anchor arm and paint Buy some 3/4 inch thick hardwood plywood, say from Home Depot. It's virtully free of voids, like marine plywood. The pulpit will likely...

I have original DD factory fuel consumption graphs for my 8V71TI's:these are the standard plot of fuel consumption vs RPM. As my engines will turn up to just about rated RPM at WOT, what additional information would I gain from this substantial investment in flo scans? In other words, do users...

It appears in general Hatteras fiberglass tanks are superior to aluminum and definitely to steel, perhaps even the near equal of monel, now likely much more expensive. What have owners heared,witnessed, experienced with tanks from the '60s,70's and '80's.

Here are some tips on 48ft yachtfish cockpit fresh water leaks to the bilge. 58's differ. I corrected three sources of fresh water to my bilge. Side copper drains in the forward catwalks, above the aft hull air vents, run all catwalk water into the bilge. I drilled a hole in the hull air vent...

I'm wondering what owners have done to stop leaks from the deck to hull joint. I have rain water which gets in above my portlights in the aft cabin of my yachtfish. I saw a 46ft sportfish in Montaulk and the owner fixed forward deck leaks by putting new caulk in his stanchion machine screws. I...