Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-30-2013, 11:31 AM   #15
Rivet Master
 
jdalrymple's Avatar
 
2009 27' FB Flying Cloud
1991 35' Airstream 350
Jay , Oklahoma
Join Date: Oct 2006
Posts: 1,603
Quote:
Originally Posted by ROBERT CROSS View Post
Power (hp) yes, but......

.......the electrical output, would remain the same @ a given RPM.

Our Honda runs @ 3000rpm in eco mode, on LPG or petrol.

As long as I'm not maxing the load on the 2000is I don't think the lower hp will ever be a concern. 4 years now SFSG.

Bob

I don't believe this is true.

Electrical current demand places more load on the generator, that is why the engine speeds up when a heavy load comes on.

Look at the specs, there is even a de-rating difference between natural gas and LP due the reduced amount of BTUs produced by natural gas.

Even this small amount of change is why one must change the orifice size when converting appliances from LP to natural gas.

Regards,

JD
__________________

__________________
Jeff & Cindy
'09 27FB Flying Cloud
'91 350 LE MH
jdalrymple is offline   Reply With Quote
Old 10-30-2013, 12:48 PM   #16
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
From All Over , More Than Anywhere Else
Join Date: Dec 2011
Posts: 10,328
Quote:
Originally Posted by ROBERT CROSS View Post
.......the electrical output, would remain the same @ a given RPM.
Quote:
Originally Posted by jdalrymple View Post
I don't believe this is true.

Electrical current demand places more load on the generator, that is why the engine speeds up when a heavy load comes on.
You guys are not disagreeing with each other; you're just missing each other's points.

As the load on the generator increases, engine RPMs do go up. That is true. BUT, for a constant electrical load, the generator will run at the same RPM regardless of which fuel it's using. It may take more of one fuel or less of another to make those RPMs…

To that extent at least, you're both right.

Most generators are happiest when running somewhere between 50% and 75% of their rated load. That range band covers the sweet spots for both the horsepower and torque curves of most small engines.
__________________

__________________
WBCCI #1105
TAC LA-4

My Google-Fu is strong today.
Protagonist is offline   Reply With Quote
Old 10-30-2013, 01:41 PM   #17
Rivet Master
 
1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,649
That just means you use more propane per hour than gasoline to compensate for the lower BTU content per gallon. It is just a mixture thing.

Perry

Quote:
Originally Posted by jdalrymple View Post
Typically, genset output is derated by about 10% when powered by LPG or natural gas.


Due to the reduced BTU output of these fuels compared to gasoline.


Regards,

JD
__________________
perryg114 is offline   Reply With Quote
Old 10-30-2013, 01:46 PM   #18
Rivet Master
 
lsbrodsky's Avatar
 
2012 25' FB International
Trent Woods , North Carolina
Join Date: May 2013
Posts: 1,687
I am not sure that is correct....I do not think you can get full rated horsepower out of an engine that has been converted to LP/NG. But, I also do not know what effect that has on the maximum load you can pull out of the generator. For me it is a non-issue because I do not ever plan to load the generator to near maximum load.
Larry
__________________
lsbrodsky is offline   Reply With Quote
Old 10-30-2013, 02:06 PM   #19
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
From All Over , More Than Anywhere Else
Join Date: Dec 2011
Posts: 10,328
Quote:
Originally Posted by lsbrodsky View Post
I am not sure that is correct....I do not think you can get full rated horsepower out of an engine that has been converted to LP/NG. But, I also do not know what effect that has on the maximum load you can pull out of the generator. For me it is a non-issue because I do not ever plan to load the generator to near maximum load.
Larry
You may never get it up to redline on LP/CNG, but how often does anybody run a generator at redline?
__________________
WBCCI #1105
TAC LA-4

My Google-Fu is strong today.
Protagonist is offline   Reply With Quote
Old 10-30-2013, 02:45 PM   #20
Rivet Master
 
lsbrodsky's Avatar
 
2012 25' FB International
Trent Woods , North Carolina
Join Date: May 2013
Posts: 1,687
Exactly, it is a non-issue.
Larry
__________________
lsbrodsky is offline   Reply With Quote
Old 11-04-2013, 08:20 PM   #21
Rivet Master
 
gaylejoe's Avatar
 
2007 25' Safari FB SE
St. Hedwig , Texas
Join Date: Jul 2006
Posts: 555
I ran my Yamaha 2499iSHC for 8.8 hrs on a tank of gas at half a load. Longer than I expected.
__________________

__________________
gaylejoe is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:59 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.