Generators and Motors
[Home] - [HELP] - [Forums] - [Library] - [Photo Gallery] - [Groups] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Vintage Electrical Equipment > Generators & Electric Motors General Discussion
Forgot Password? Join Us!


Generators & Electric Motors General Discussion Antique Generators and Old Electric Motors: Questions and answers about restoring and showing old power generation systems.

Generators & Electric Motors General Discussion

Alternator on a hit and miss?

this thread has 14 replies and has been viewed 961 times

Thread Tools Display Modes
Old 02-12-2019, 03:43:00 AM
armandh armandh is offline
Join Date: Aug 2006
Location: Suburban St. Louis, Missouri
Posts: 3,031
Thanks: 268
Thanked 822 Times in 633 Posts
Default Re: Alternator on a hit and miss?

just think about how much an automotive engine speed varies
by using this free advise, you, your heirs, etc
absolve, save, and hold harmless the advisor.
Reply With Quote
The Following User Says Thank You to armandh For This Post:
Sponsored Links
Old 03-08-2019, 08:52:19 PM
Mark Dieckmann Mark Dieckmann is offline
Join Date: Mar 2009
Location: Osgood, IN, USA
Posts: 125
Thanks: 35
Thanked 32 Times in 24 Posts
Default Re: Alternator on a hit and miss?

I just ran across this thread, I realize it is a little old. Has anyone actually tried this? It seems to me that the biggest problem might be the 2 hp. That’s not much power and given the inefficiencys in the equipment I would guess it will do more hitting than missing.
Reply With Quote
Old 03-08-2019, 09:33:13 PM
Odin Odin is offline
Join Date: Jun 2014
Location: Elmira, New York
Posts: 1,375
Thanks: 386
Thanked 1,118 Times in 583 Posts
Default Re: Alternator on a hit and miss?

Thread isn't that old. I have actually done this.

I have a Delco 10SI alternator mounted to a bracket that clamps onto the skid of my Little Jumbo engine. A V belt is then run from the engine's flywheel to the alternator pulley. With the engine turned down to roughly 300 RPM instead of the rated 500 RPM, the alternator is spinning around 1200 RPM. My alternator is a 3-terminal alternator, and the field contact is connected through a manual switch. Like so I start the engine with the field turned off. The alternator then spins but produces no power while I start the engine and get it running properly. Then I close the switch to energize the field and make it all work.

Typically when first connected the alternator drags the engine to the ground. Sustained full loads, only misses every 2nd or 3rd charge, and if the engine stumbles it can't recover and stalls. Its rated 1 3/4 HP, I do have some blowby but it isn't in bad shape. Just the reduced power from running at 300 RPM is enough that the alternator is a full load for it at first. Once it has run a little while the alternator's output decreases and the engine can miss a few times between hits, usually by then there's steam drifting off the hopper.

I use the alternator to keep a car battery charged when I'm at shows. This battery then powers the 12v blower on my blacksmith forge, and also runs a cellphone charger for my wife so she stays happy while relaxing nearby.

At the moment I'm planning on making an updated video of the setup once the weather improves. For now here's a picture of my engine and forge all set up at a show. Its apparently too big of a picture for an inline view.
Reply With Quote
The Following 2 Users Say Thank You to Odin For This Post:
Old 03-09-2019, 11:29:20 AM
Wayne 440 Wayne 440 is online now
Join Date: Nov 2004
Location: Kentucky
Posts: 6,860
Thanks: 426
Thanked 6,115 Times in 2,888 Posts
Default Re: Alternator on a hit and miss?

I took the liberty of a little editing...
Attached Thumbnails
Click image for larger version

Name:	alternator.jpg
Views:	49
Size:	257.9 KB
ID:	330248  
Reply With Quote
The Following User Says Thank You to Wayne 440 For This Post:
Old 03-09-2019, 01:45:30 PM
Andrew Mackey Andrew Mackey is offline
Join Date: Nov 2004
Location: Rockaway, New Jersey USA
Posts: 13,665
Thanks: 1,929
Thanked 6,347 Times in 4,100 Posts
Default Re: Alternator on a hit and miss?

A friend has an IHC 11/2 HP M engine belted to a 100 amp AC Delco 1 wire alternator, off a Chevrolet. He charges a 12 volt battery and that in turn powers an inverter that runs a fan and other 110 AC items. Cool set up for an engine show. Your dish pan should also be able to do the same. He uses a modern 100 amp generater and a serpentine belt drive. Belt rides on flywheel face and the stock pulley on the generater.
Reply With Quote
The Following User Says Thank You to Andrew Mackey For This Post:


Thread Tools
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

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
Alternator ID please Kramers Vintage Diesel and Oil Engines 2 01-20-2017 05:50:24 AM
Dayton 1W832 Alternator B&S 9hp no power from Alternator Rickfa Generac Generators (SEARS, etc.) 6 01-25-2015 01:35:42 AM
Alternator for a 10 roy wap Kohler Generators 5 12-20-2014 09:13:52 AM
Alternator kswavey Antique Farm Tractors 1 09-25-2006 09:25:53 PM
The Mogul Runs! Hit & Miss,Miss,Miss, Miss,Miss Dan Bogart Antique Engine Archives 7 06-24-2003 12:10:08 AM

Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 08:24:41 PM.

Smokstak and Enginads site search!

All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2016 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277