Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-21-2003, 08:27 AM   #15
Rivet Master
 
LOST , Hawaii
Join Date: Jun 2002
Posts: 2,193
Quote:
but what happens when you have weather like we've been having here in the northeast?
It it is not only the weather that hurts solar. Boondocking to me usually is back in the woods and all the shade really hurts solar, it is not a really an efficient means of electrical production for an a RV. The panels are fixed and no consideration is given to solar when sites are established.

A generator is necessary for extended stays. I would look for one of the 1800 rpm engines, noise is cut in half by reducing the rpm's and the life is longer. On the downside these are usually Kohler or Onan and they are heavy compared to B&S. The alternator does neeed to turn faster than this but that can be done with pulley ratios.

Supertrapp makes some awesome mufflers. They have a website but it is cars and bikes. They actually make mufflers for everything from small gas engines to large stationary diesels. I can stand next to my 4 kw onan and speak at a normal level.

John
Attached Images
 
__________________

__________________
74Argosy24MH is offline   Reply With Quote
Old 06-21-2003, 09:06 AM   #16
Retired Moderator
 
john hd's Avatar
 
1992 29' Excella
madison , Wisconsin
Join Date: Aug 2002
Posts: 4,644
Images: 40
speaking of sparks...

one other thing to consider is a spark arrestor when camping on federal lands or any where else for that matter.

wouldn't want to be responsible for a fire like they have in arizona now

john
__________________

__________________
john hd is offline   Reply With Quote
Old 06-23-2003, 09:55 AM   #17
1 Rivet Member
 
Join Date: Jun 2003
Posts: 15
H.P. needed per KW

in a previous post:

"a good rule of thumb to follow is 750 watts per horsepower. "

Actually, this is not the case.

Yes, it is true that there are about 745 watts per 1 horse power. However, alternators aren't 100% efficient, so, the generator industry uses a 500 watts per horse power rule of thumb.

So, a 3 h.p. Briggs would be rated as adequate for a 1500 watt generator.
__________________
Marc Denis
a wannabee full timer
working on the road
mldenis is offline   Reply With Quote
Old 06-23-2003, 10:42 AM   #18
Retired Moderator
 
john hd's Avatar
 
1992 29' Excella
madison , Wisconsin
Join Date: Aug 2002
Posts: 4,644
Images: 40
good point

marc

good point on the losses, the rule of thumb i was reffering to was for transformers.

most of them are around 86% efficent anyway. the other 15% is copper/core losses and heat.

your formula would be better because it would take into account reactive losses.

it takes power to push reactive load as well as resistive load.

at the power company we spend millions to eliminate reactive (var) loads with capacitor banks.

the 500 watt rule would give one enough headroom in a genset to prevent wearing/burning it out.

john
__________________
john hd is offline   Reply With Quote
Old 06-23-2003, 02:25 PM   #19
Moderator Emeritus
 
Pick's Avatar
 
1972 31' Sovereign
High Springs , Florida
Join Date: May 2002
Posts: 2,310
Images: 36
Send a message via AIM to Pick
Here's a site that may help in the generator project:

Home made generator parts

How to Generator Page
__________________
ARS WA8ZYT
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
Lots of Hot Sauce!
Air # 283
WBCCI 1350
Pick is offline   Reply With Quote
Old 06-23-2003, 06:45 PM   #20
Retired Moderator
 
john hd's Avatar
 
1992 29' Excella
madison , Wisconsin
Join Date: Aug 2002
Posts: 4,644
Images: 40
cool links!

pick

cool links!

john
__________________
john hd is offline   Reply With Quote
Old 06-24-2003, 04:16 AM   #21
2 Rivet Member
 
sjptak's Avatar
 
Join Date: Jun 2003
Posts: 83
GREAT links!! I visited the epicenter and saw a couple of books that I may add to my "how to" library. John, Pick, If I do this with a GM alternator with a built in regulator, will I have to be concerned with overhcarging?
__________________
Stan and the Lou
Together Forever
BTW, that's MaryLou
sjptak is offline   Reply With Quote
Old 06-24-2003, 05:41 AM   #22
Retired Moderator
 
john hd's Avatar
 
1992 29' Excella
madison , Wisconsin
Join Date: Aug 2002
Posts: 4,644
Images: 40
will I have to be concerned with overhcarging?

stan

i don't think you would need to worry about overcharging.

you could add a 5 dollar shunt ammeter into the charge line to be sure.

john
__________________
john hd is offline   Reply With Quote
Old 06-24-2003, 06:24 AM   #23
Aluminut
 
Silvertwinkie's Avatar
 
2004 25' Safari
. , Illinois
Join Date: Feb 2003
Posts: 10,334
Very, very cool links Pic! I feel like I just took a community college class in power generation!

I have a motor laying around somewhere, maybe I'll play around with it... in the meantime, I think I may be Honda 1000 bound.

Eric
__________________

__________________
Computers manufactured by companies such as IBM, Compaq and millions of others are by far the most popular with about 70 million machines in use worldwide. Macintosh fans note that cockroaches are far more numerous than humans and that numbers alone do not denote a higher life form. -NY Times 11/91
Silvertwinkie 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 03:42 PM.


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.