| Author |
Message |
    
greencorn
Member
Username: greencorn
Post Number: 7
Registered: 11-2012
| | Posted on Monday, May 25, 2015 - 07:47 pm: | 
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Can someone say how the old one cyl gas engines such as the Frisco Standard maintained electric supply when running? Did you just charge up a battery and run until it quit, or was there a generator attachment, or mag? |
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 1064
Registered: 07-2002
| | Posted on Monday, May 25, 2015 - 08:35 pm: |
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Low tension magnetos were available for ignitor motors, high tension for jump spark. Magnetos were high tech expensive items, most used dry cell batteries, use and discard, pay me now or pay me later. |
russell
Senior Member
Username: russell
Post Number: 76
Registered: 08-2003
| | Posted on Monday, May 25, 2015 - 09:28 pm: |
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The points being apart most of the time and just coming together briefly before parting to give the spark makes the battery last longer.
When I picked up my Frisco from its final workplace in a mill, there were lots of remains of white clay porous pots around suggesting that she was run by Leclanche cells (remember that from your early science lessons?) They did 1.4V per cell and they were used on the old home phones. They stopper producing juice after a while but would recharge if rested.
I have got a dynamo with exposed magnets and a governor that pulls the rubber tyred wheel back off the flywheel if the revs get too high. I'll post a pic of it when I dig it out if you like. They are probably common. |
greencorn
Member
Username: greencorn
Post Number: 8
Registered: 11-2012
| | Posted on Tuesday, May 26, 2015 - 09:14 am: |
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The battery concept seems to make sense since there's no provision for a mag on my old motor. Yes Russell, I'd like to see the dynamo arangement on your engine. |
johnoxley
Senior Member
Username: johnoxley
Post Number: 131
Registered: 04-2010
| | Posted on Tuesday, May 26, 2015 - 04:29 pm: |
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Hi - had a Union of similar design and installed late 1890s. Used 4 large cylindrical telephone batteries (about size Coke can) giving 4 x 1.2 volts. Also had a horseshoe magnet dynamo on a cast iron platform above flywheel and flat belt drive. Selector switch on bulkhead near engine - Start + idle on batteries then run on dynamo. Forget to switch back when slowing down and engine stops. Used to get zap from switch if wet fingers touched open contacts. |
greencorn
Member
Username: greencorn
Post Number: 13
Registered: 11-2012
| | Posted on Thursday, May 28, 2015 - 10:24 am: |
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Another question about Frisco Standard; Is there somewhere I can find the serial number of the engine (4 hp) or another way to determine when it was built? Also what is the bore and stroke, RPM? |
russell
Senior Member
Username: russell
Post Number: 78
Registered: 08-2003
| | Posted on Wednesday, June 03, 2015 - 04:44 pm: |
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Here are a couple of pix that show dynamos on two of my engines (excuse the state of the shop -we were moving). They bear on the aft side of the flywheel and a centrifugal mechanism pulls the driving wheel out of contact if the revs get up.
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greencorn
Member
Username: greencorn
Post Number: 17
Registered: 11-2012
| | Posted on Thursday, June 04, 2015 - 10:16 am: |
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Thanks Russell. |
