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Engine options....decisions, decisions, decisions....
On Fri, 17 Oct 2003 21:39:02 -0400, DSK wrote:
Gould 0738 wrote: What kind of speed do you get with your Lehman? The NA Perkins has a similar HP rating. We have the 135 six cylinder and a four blade 24" X 21" prop. This gives us ~ 7 1/2 knots at 1500 RPM, burning ~ 1.5 gpm. For the first half of this year, we burned 1.3 gph. I occasionally crank it up to 2250, which puts us about 8.6 knots with a clean bottom. I think if we were to travel any sustained distance at these revs, we'd probably be burning 5 gph or more. I like the quiet & the fuel economy. However, remember that diesels are best at 85 to 98% of their rated full load. Running a gas engines at low load is good, running a diesel at low loads will cause premature wear. I think having a bit in hand for waves & head winds is nice, but having an extra 50+ HP and lugging the engine all the time is bad. The guy down the block has a Sonic 45SS parked on a trailer in front of his house. Why someone would want a 3 engine missile to "blow $600 in gas going 85 knots in a day's running" is beyond me (his words). The boat cost twice what his house does. JJ But then I am somewhat of an anti-horsepower freak. The amount of horsepower most people think is desirable is beyond insane. Fresh Breezes- Doug King James Johnson remove the "dot" from after sail in email address to reply |
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