| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 378.1 | 1 HP = 15-18 foot lbs thrust | AOSG::HEBENSTREIT | | Mon May 02 1994 10:25 | 4 |
| Erik, a salesman at the Kittery Trading Post told me that 1Hp
equates to roughly 15-18 pounds of thrust.
Good luck, mark
|
| 378.2 | volts x amps = power | TAMDNO::WHITMAN | the 2nd Amend protects the other 9 | Mon May 02 1994 11:25 | 11 |
| If you use the voltage times amps = watts as an indicator you can do the
power comparisons in an apples-to-apples manner.
Power = voltage x current (P=IE)
Almost all the electrics tell you both the voltage and amperage draw. Do the
multiplication and you should get the actual "power" in watts.
Some machines may be more efficient in that there may be less heat loss,
but generally you should be able to do a reasonable comparison this way...
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| 378.3 | 1 HP = 550 ft.lb./sec. | ELWOOD::CRANSON | | Tue May 03 1994 15:36 | 2 |
| 1 HP = 745.7 watts
|
| 378.4 | gimmick | TAMDNO::WHITMAN | the 2nd Amend protects the other 9 | Wed May 04 1994 09:30 | 20 |
| -< 1 HP = 550 ft.lb./sec. >-
1 HP = 745.7 watts
Somewhere there is a marketing disconnect.
1hp = 745.7W / 12V = ~62A
3hp = ~2.2KW / 24 = ~100A
there is no way your 3HP electric on 24V draws 100 amps
NOR
does the 1HP electric on 12V draw 62 amps
Gotta be a marketing gimmick to boost the numbers. It cannot be ACTUAL power
consumption. You'd melt the wiring. I believe my 12V 28lb thrust electric has
a 30A fuse.
|
| 378.5 | words | NUBOAT::HEBERT | Captain Bligh | Wed May 04 1994 09:39 | 13 |
| Maybe they've determined that a given electric trolling motor mounted on
a reference boat which is tethered to a graduated scale fixed to shore
pulls with the same force as an X horsepower gasoline-fired outboard
motor under the same controlled conditions.
So, pick a 1 horsepower outboard (is there such a thing?), mount it on
the reference boat, and under controlled conditions measure the amount of
force exerted pulling against the scale. Then, replace the gas motor with
an electric trolling motor, and adjust the controlling factors (voltage,
current, prop diameter and pitch, motor RPM) until you equal the force
exerted by the 1HP gas outboard. Call that the "electric equivalent to a
1HP motor."
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| 378.6 | | SUBPAC::CRONIN | | Wed May 04 1994 10:18 | 9 |
| .5 hit it on the head. Somewhere in Minn Kota literature it tells
you that it is equivelent thrust of a given horsepower.
My 2 cents? Buy one with the Maximizer feature. Infinitly
variable power and longer battery life. I have a 36 lb. thrust Power
Drive on the front of my 15 ft. Whaler and it gives my lots of power
and lots of time per charge.
B.C.
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| 378.7 | 42 lb it will be... | NEMAIL::PETERSEN | | Thu May 05 1994 10:25 | 10 |
| It does sound more and more like a marketing gimmick, why didn't they
just call it a 50 lb thrust, or whatever comes after the 36/42 lb
models? The prices really show that there can't be much of a
difference, I think the 36/42 were about $285 and the 3 HP was $300.
I think I'll probably go with the 42lb transom mount.
Thanks for the help.
Erik
|