Harvey
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How much can we get from a full load test on a 6/1?


Hi all, yesterday I did some full load test in new 6/1 (Driving an ST5 head). The engine note changed, but she just kept chugging along and cranked out the 3kw as if it could do it all day.I don't have the ability to test 3.2kw or 3.5 kw so my question to other 6/1 users is....How much can we get from a 6/1 before it becomes overloaded.I tried and increased the load to 3kw I was expecting a lot of grunting and some black smoke but nothing happened. So, advice me for this guys.
8 months ago
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Rahul Shah | Oct 14 2011

Full load test on a 6/1:

Unless you are measuring voltage and current to the load, you really do not know. Those Being a fixed resistance heaters consume only 1.5KW at 120V Their input. That the harmonically excited Knowing ST Experiences head drop voltage under load, I would guess a hazard that you are not even loaded to a full 3KW ... As an example, I use a 2KW heater baseboard and a 1.5KW as dummy loads. I have raised the output of my ST Slightly to Compensate for line loss getting to my house. With Both loads on, I droop right to 120V per leg at the loads. I am getting close to the full 3.5kW and it is a little Excessive for the engine. If you have a pretty good exhaust thump and quite a lot of black smoke. That is a good indication of Reaching the maximum capacity engine, When the smoke shifts from blue to black. Another good indicator is RPM / frequency droop. With the governor utterpower mode, I get 62Hz to September RPM unloaded. It droops to 58Hz at a full load of 3KW. It Does This very consistently.



My take on this subject is the 6 / 1 is overrated Typically, more like a Generally and 5 / 1 at elevation.


Being reasoning 6hp equate to a bit over 4.4 kw mechanical

st if the head is 80% efficient, and the drive eats up 2%, the aggregate is 78%

4.4 x 78% = 3.4 kWatts, That Should Be the max full load

and I would expect Some dark smoke, but not black smoke billowing, and
Should it hold at least 58Hz Without falling off, Also the rack Should not be stuffed to full throttle.


Diesels lose 3% 'for each 1000ft of elevation above sea level, so at 3k ft elevation Might one expect 3kwatts max output
Some smoke and with a stable 58Hz.

With Every shift in rpm, and ever draft Them That blows over.

I Went Crazy About Trying to get an Accurate load reading, watching volts and amps, home and shift logging, averaging etc.

is very Difficult to do, Along With timing the event, and Keeping Track of fuel weight of volume,, Takes About 6 eyes, Many Hands, and
computing power more brain Than i have to track it all.


That is why I got so Excited about the GE kw / hr meterhead, it Can Be Set to measure and readout in watt / hours, and does the whole thing
very well, It Does not Care About shifting loads due to volt / amp / rpm / breeze / phase of the moon or whatever,, Measure and calculate it on accurately remove the fly.


All I do is verify my rpm That is as close to 60Hz as i can Maintain it, stabilize the load, temps and Then run the test Which Measures
Used for Each 1000watt/hrs fuel generated. i just mark off at Each 1000 watt / hrs generated by start / stop fuel weights, and continue
Until i have done on 3 steps' for each load level, This spreads the weight over fuel the scale on the scale.


Then it is a simple matter of punching in the results Into the spreadsheet program, and a graph is plotted auto, now i get nice clean graphs, are based on repeatable That results were Before My data points all over the place, making rough graphs, and hard to replicate testing Also,, Which always left me very uncomfortable.


Consistent and replicable data is in relative results Very useful, accurate data That Is Also Consistent and replicable is a quantum leap ahead in my opinion.

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