[modeleng] Re: electric engines

Hi Alan,

Already considered it. I have used several of these motors already. My 
mate produced the saw that was in ME last year. I have built an updated 
mk2 version using a good wiper motor off a Sharran van. These are more 
powerful as they drive one very big wiper. They all run quite hot under 
normal conditions but in an enclosed tube they get very hot....hot 
enough to need welding gloves to pick it up. I would need to provide 
plenty of cooling thru the tube. At present I have opted for the C5 
motor as it is very torquey, powerful, runs cool, very economical on 
power and I got it very cheap. Brand new never used. Also using a wiper 
motor with its own gearbox gives problems of run-on when stopping...or 
rather the lack of it...because of the wormdrive inside. Also the 
gearbox could not move the piston fast enough to give the crank a speed 
of upto 250rpm. It would look very odd if flat out forwards the crank is 
hardly turning. Also the piston is already going to do something else on 
this engine. The crank will move the piston to give me plenty of air and 
compression in the cylinder. The piston will be the biggest i can fit in 
with two rubber seals. This air will be forces down a blastpipe into the 
chimney and hopefully thru trial and error will give me the puffing 
noise. If it works it will always be in sinc with the motor. From there 
there is a thought to introduce a very small amount of oil in each stoke 
and direct the exhaust air oil from the blast pipe onto a small electric 
element in the chimney to give puff and smoke effect.

As I said I am in thge first stages of fabrication.  I needed to get the 
boiler tube and the ali for the fire box and build the wheels to match 
the sizes. Meanwhile the rest of the bits are sitting in a large plastic 
box as they get bought or better yet scrounged. I never work on only one 
project at a time. I normally have several on the go at any one time but 
they are often related. I need a large gear wheel so am building a 
stand-alone gear cutter. Started building a large disk sander to help 
make the spokes but then found one cheap at Warco at Harrogate so 
stopped building. Found a Lathe for sale by a friend of a friend so paid 
him £400 for a Denford Viceroy with EVERY accessory available. Topslide 
and cross-slide feed,screwcutting with every gearwheel I will ever need 
and a brand new 2hp induction motor. At 300kg it has already earned the 
name of "The Beast". Not managed to stop or stall it yet...took 5mm off 
a 30mm bar by accident in one pass. It was supposed to stop at the 5mm 
shoulder I was machining onto it. I can now handle all the machining for 
my engine in my own workshop.

Finally a question for everyone. Whats the cheapest,easiest and safest 
way to nickel plate components. I was hoping not to paint any of my 
engine but to leave it "natural". Obviously this is ok with all metal 
except ferrous. Wheels are steel so need plating but are 310mm dia and 
60mm wide. The hub is 75mm wide but is ali. Will all fit in a plastic 
washing-up bowl is appropriate. Also not keen on keeping and using acid 
at home. I am happy to leave them soaking for weeks if there is a 
solution I can use.



Julian in Leicester at halpast nine cos its a rest day today but first 
early shift tomorrow so up at 4am.















Alan Stepney wrote:

>An interesting project.
>
>One quick thought. (Probably a stupid one, but it is 4am right now!), how 
>about fitting a car/lorry wiper motor in the "boiler", complete with drive 
>mechanism and coupling that (internally) to the "piston", which would then 
>drive the crankshaft.
>You already have the reciprocating movement there so it would just need 
>connecting.
>Alan Stepney
>
>http://www.alanstepney.info
>Model Engineering & steam engine information pages
>----- Original Message ----- 
>From: "Julian" <julianharrison7@xxxxxxxxxxxxxx>
>To: "models" <modeleng@xxxxxxxxxxxxx>
>Sent: Tuesday, May 29, 2007 11:47 PM
>Subject: [modeleng] electric engines
>
>Hi Gents
>Just read all the previuos emails re a motor for wooden engine. The
>dielemmas are the same for me. I am part way thru building an electric
>traction engine.
>
>Julian in Leicester
>
>
>MODEL ENGINEERING DISCUSSION LIST.
>
>To UNSUBSCRIBE from this list, send a blank email to, 
>modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.
>
>
>  
>

MODEL ENGINEERING DISCUSSION LIST.

To UNSUBSCRIBE from this list, send a blank email to, 
modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.

Other related posts: