[SEL] Hercules tg, idleing

[Luke Tonneberger]

Hi J.B.,

I've had our throttle gov 9hp Sattley down to about 84 or 86 RPM if I 
remember right. That is with the Webster mag in the retarded position.       
  I was just thinking...... using some CAD drafting software, if you were to 
measure the throat diameter in the carb where the butterfly is. Draw a 
cylinder to represent that throat size.  Then take a cross section at the 
angle where the butterfly would need to be.  Make an auxillary view 
projected out at the angle of the cross section.  This would give you a flat 
pattern of the egg shape needed to close off the throat.  Print that off at 
full size on a printer, cut it out with scissors and transfer it to brass or 
whatever is used for the butterfly material.  Once it was cut out, you then 
would have to file the edges of the butterfly to match the throat of the 
carb to close it off tight.   I hope you understand what I'm trying to say.  
I can picture it in my mind.  I think the hardest part would be to 
guesstimate the angle the butterfly would need to be at.

Luke Tonneberger


>From: <jbcast at charter.net>
>Reply-To: The SEL email discussion list <sel at lists.stationary-engine.com>
>To: <sel at lists.stationary-engine.com>
>Subject: [SEL] Hercules tg, idleing
>Date: Tue, 20 Jul 2004 0:58:30 +0000
>
>I took the mixer of my 12hp Herc throttle governed this weekend, it was 
>overspeeding, over 300 with the throttle shut down. The butterfly looks to 
>be home made, soldered in. It didn't fit very closed when shut so I worked 
>on it a while and got it to shut fairly tight. I put it together and it ran 
>about 325 on the governor, when throttled down it would die. I took it down 
>and when the throttle was closed it blocked the fuel tube. I drilled a 
>small hole where the tube met the butterfly, I can now slow it down to 
>about 200 rpm s in the slow position. Still a lot faster than I would like, 
>I'll have to work on it some more. What kind of speeds can I expect from an 
>engine like this?
>J.B. Castagnos
>Belle Rose, LA

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