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Search: Posts Made By: Dawkahab
Forum: Gear & Maintenance   12-27-2006
Replies: 5
Views: 4,176
Posted By Dawkahab
Cam it is simply not true that AGMs will safely...

Cam it is simply not true that AGMs will safely "accept unlimited charge rates" .Thermal runaway can cause excessive temperatures with potentially disastrous results. Read the paper by Jaworski and...
Forum: Gear & Maintenance   12-27-2006
Replies: 5
Views: 4,176
Posted By Dawkahab
You can parallel them but it is not recommended....

You can parallel them but it is not recommended. The 4Ds will charge more quickly and then potentially overcharge. You do not say what your charge rate is but it probably is less than 25% of capacity...
Forum: Gear & Maintenance   12-27-2006
Replies: 74
Views: 14,875
Posted By Dawkahab
A displacement hull requires about 2-3 HP per...

A displacement hull requires about 2-3 HP per metric ton to achieve hull speed. If we have a 5 metric ton vessel (approx 11,000 pounds) we need 10-15 HP depending on wave and wind action. to make it...
Forum: Gear & Maintenance   12-27-2006
Replies: 14
Views: 1,480
Posted By Dawkahab
When ever you convert from DC to AC or...

When ever you convert from DC to AC or conversely, orchange DC voltages through a convertor you are going to suffer at least a 15% loss. The first law of thermodynamics says"you don't get anything...
Forum: Gear & Maintenance   12-16-2006
Replies: 35
Views: 3,366
Posted By Dawkahab
You are right, bow thruster motors are similar to...

You are right, bow thruster motors are similar to staarter motors although designed to allow somewhat longer run time. and the batteries that work well for starting, thin plate high output cranking...
Forum: Gear & Maintenance   12-11-2006
Replies: 6
Views: 959
Posted By Dawkahab
I have both a 1000 and 2000, buy the 2000 for the...

I have both a 1000 and 2000, buy the 2000 for the extra power because after it has run for a while output will drop to about 60% of initial so the Honda dealer tells me. The suggestion to use an Iota...
Forum: General Discussion (sailing related)   12-09-2006
Replies: 19
Views: 12,876
Posted By Dawkahab
My steel 47'round bilge schooner is 20 years old,...

My steel 47'round bilge schooner is 20 years old, primed with zinc rich epoxy,painted inside and out with high grade commercial quality epoxy, Devoe 235, and the exterior is finished with...
Forum: Gear & Maintenance   12-07-2006
Replies: 18
Views: 2,054
Posted By Dawkahab
Cam is right, SS is never a good choice in an...

Cam is right, SS is never a good choice in an oxygen deprived environment. To remain passive stainless requires a constant flow of oxygen, you might look at the tensile strength of high carbon...
Forum: General Discussion (sailing related)   12-01-2006
Replies: 194
Views: 13,068
Posted By Dawkahab
To splice the main brace means to have a drink

To splice the main brace means to have a drink
Forum: Gear & Maintenance   12-01-2006
Replies: 3
Views: 784
Posted By Dawkahab
You can get a lot of water through a 1.5"...

You can get a lot of water through a 1.5" hose.
Forum: Gear & Maintenance   11-29-2006
Replies: 45
Views: 5,170
Posted By Dawkahab
Interphase unit is not what they claim, I have...

Interphase unit is not what they claim, I have used one for two years off shore and it is not very definitive
Forum: Gear & Maintenance   11-26-2006
Replies: 3
Views: 2,384
Posted By Dawkahab
Call boat Electric in Seattle they are very...

Call boat Electric in Seattle they are very experienced with these units
Forum: Gear & Maintenance   11-26-2006
Replies: 12
Views: 1,681
Posted By Dawkahab
a shaft driven generator usually is not a problem...

a shaft driven generator usually is not a problem with pots, towed gens are
Forum: Gear & Maintenance   11-26-2006
Replies: 23
Views: 2,025
Posted By Dawkahab
go to semarine.com and get their battery sizing...

go to semarine.com and get their battery sizing spread sheet
Forum: General Discussion (sailing related)   11-25-2006
Replies: 7
Views: 2,081
Posted By Dawkahab
BEP is better quality and better priced than...

BEP is better quality and better priced than either Perko or BlueSea
Forum: Gear & Maintenance   11-20-2006
Replies: 40
Views: 3,346
Posted By Dawkahab
A 1500 watt inverter will draw 125 amps DC. if it...

A 1500 watt inverter will draw 125 amps DC. if it has a surge capacity of 3000 watts it will draw twice that fror a line cycle. Consult a voltage drop chart to determine approriate cable size....
Forum: General Discussion (sailing related)   11-11-2006
Replies: 23
Views: 5,324
Posted By Dawkahab
Bill Watts is a measure of Power, the rate of...

Bill Watts is a measure of Power, the rate of doing work, not energy
Forum: Gear & Maintenance   11-05-2006
Replies: 18
Views: 1,753
Posted By Dawkahab
Two ways to check glow plugs 1. Put your...

Two ways to check glow plugs
1. Put your fingeer on the top of the plug where the wire attaches, It should be very warm to hot. Do not activate plugs removed from the block you may burn them out....
Forum: Gear & Maintenance   11-05-2006
Replies: 7
Views: 1,157
Posted By Dawkahab
On Borg Warner Gears, especially 70 series, 71-73...

On Borg Warner Gears, especially 70 series, 71-73 etc. Coolers are not optional, In fact a very experienced BW repair facility advised me many years ago. that the cooler should receive the...
Forum: Gear & Maintenance   09-30-2006
Replies: 2
Views: 1,047
Posted By Dawkahab
Aquamarine, Inc. Deer Harbor Washington, I have...

Aquamarine, Inc. Deer Harbor Washington, I have owned several, they are quality industrial grade no nonsense and very competitive price
Forum: Gear & Maintenance   09-21-2006
Replies: 18
Views: 3,198
Posted By Dawkahab
Look at the DuoGen water generator

Look at the DuoGen water generator
Forum: Gear & Maintenance   09-21-2006
Replies: 2
Views: 3,989
Posted By Dawkahab
Watermisers are a coallescing cap, they collect...

Watermisers are a coallescing cap, they collect the microdroplets of electrolyte which attach to the hydrogen and oxygen bubbles produced during recharge. They do not recombine the gasses as do...
Forum: Gear & Maintenance   09-21-2006
Replies: 2
Views: 774
Posted By Dawkahab
Commercial quality

Commercial quality
Forum: Irwin   09-21-2006
Replies: 2
Views: 1,576
Posted By Dawkahab
Can,t help with the panel, not enough...

Can,t help with the panel, not enough information.You should get a qualified ABYC electrical technician to solve this. Alternating current can kill you. You said you got a spark when you plugged in....
Forum: Gear & Maintenance   08-15-2006
Replies: 3
Views: 2,154
Posted By Dawkahab
Globe impellers were originally sold under the...

Globe impellers were originally sold under the name Barco. Many years ago there were some problems with them coming apart in short order. That has, to the best of my knowledge been solved. I have...
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