[SEL] RE: Castings/now hot bulb engines

[Russell Gilbert]

Sorry for the late reply,  I'm not as yet familair with how a hot tube 
engine works but .... don't they require a constant lamp to run??? I guess 
one would just remove the lamp? Blackstone and Austral oil engines can 
maintain the hot box/vapouriser temp when running.
Russell




At 06:29 PM 29/04/2006 +0800, you wrote:
>Interesting subject Russell.......would the same problem arise with a 
>three valve engine ? I ask because I have an engine ,make unknown . A lot 
>of the essential bits were missing such as the fuel system . As I have 
>nothing to copy I have to '' invent'' the system . It is a Hot Tube engine 
>with a pecker operating the fuel  or vapour valve and the  fuel oil supply 
>would be constant. One thing that worries me is the fact that the governor 
>is belt driven so there will be no leaving the engine unattended!
>----- Original Message ----- From: "Russell Gilbert" <russell at ncable.com.au>
>To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
>Sent: Saturday, April 29, 2006 2:28 PM
>Subject: Re: [SEL] RE: Castings/now hot bulb engines
>
>
>>
>>>One little danger with these engines is the fuel valve. As
>>>the engine governs on the non-opening of this valve prolonged exposure of
>>>the valve spring to heat can lead to the excitement of the engine taking
>>>off. I have seen this happen with both Australs and Blackstones and it is
>>>heart-stopping.
>>
>>Heart stopping is putting it mildly Patrick. This has happened to me with 
>>the very first time of starting my 6.5hp Blacky. There was no warning of 
>>this happening as all the fuel valve assembly looked fine. It had even 
>>been pulled apart, cleaned up and re-assembled. The first few tries my 
>>engine didn't start. I made a new coil for the bottom section of the hot 
>>bulb out of thin sheet metal. once this was done gave it another go. It 
>>made the difference for the engine as it soon fired up. When it first 
>>made a few puffs I had the usual smiles one get when bring one of these 
>>old girls back to life. However the smile soon left as the revs moved up 
>>and with no apparent way to shut the engine down; my smiles quickly went 
>>as one was wondering do I just run; or stay and try to and calm the old 
>>girl down. After shitting myself for a few seconds it was obvious I had 
>>to save the engine. It was my pride and joy old motor etc etc. I had a 
>>friend with me; (btw; this thing was really starting to pick the revs up 
>>big time!) we pulled the fuel line out of the tank thinking that it will 
>>run out quick enough, Wrong, they don't need much to fire. Fuel bowl was 
>>to hot to remove as was other parts. We grabbed some pliers to try hold 
>>the valve shut. No good, the small-ish pliers were to hard to get a 
>>decent hold onto the part. Went for a bigger pair of pliers and luck was 
>>on our side as we managed to get a good grip. The spring on the valve 
>>started to crush a little allowing the pliers to bite in on the valve 
>>better and it slowed down nicely to a holt. One then went and wiped away 
>>the stained undies. Got a few shots of bourbon into the system and left 
>>the engine alone for a little while. I think all this happened about the 
>>time on the SEL we were chatting about exploding flywheels etc about 4 
>>years ago. Well I can smile about it now and talk about my 1000rpm 
>>blacky. From all this I guess could come a question for any oil engine 
>>gurus as to how would they (if there is an easy way) shut down a hot bulb 
>>engine like the Ronnies and blacky's if they ran away like that.
>>
>>Russell
>>
>>
>>
>>Russell Gilbert
>>Sunny Sunraysia
>>russell at ncable.com.au
>>http://community.webshots.com/user/russellsrelics
>>
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>
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Russell Gilbert
Sunny Sunraysia
russell at ncable.com.au
http://community.webshots.com/user/russellsrelics