Fiat 702 Tractor

The rad looks great Graham.

I know what you mean re jumbled lines when making construction drawings for your own use and not necessarily to share with others - perfectly useful to you, but often gibberish to others. Mine are similar.

On the rad, is the whole circular crankcase cover / lower rad tank housing filled with coolant, or just a small tank area below the rad core filled with coolant? Will the rad have a soldered tube core, with small tubes flowing vertically? Or do you plan to use commercial pre-made rad core material for rebuilding car or computer rads?

Thanks for posting, JD

"The engine is a very interesting piece of engineering in that air is drawn in around the exhaust manifold and then passes via a connecting pipe between cylinders 2 and 3 to the base of the carburettor, it then passes up through the carburettor and back to the intake valves via a connecting cast in passageway to the intake manifold which is also cast into the block. Along the way back through the block to the intake passages it passes the govenor butterfly which restricts the rpm to 900."

Hi Graham

Looking at the engine specs with the intake air being preheated I would think that this engine was designed to run on "Kerosene" or "Vaporising Oil".

Following your project with great intrest.

Eric

Hi Graham, been quietly following along waht a fantastic project, have you considered writing it up for the magazine ?.

Stew

Hi Graham

Just a little aside on "Kerosene Engines"

""You are quite right as regards the running on Kerosene, the contemporary reports I have read of the tractor say it was not happy running on Kerosene unless the engine was working hard"".

My experience with "Kerosene" powered tractors was gained as lad from driving "Fordson" Tractors on all sorts of jobs from ploughing and cultivating to Haulage work at harvest time.

When on light work the Radiator Blind was covering almost all of the front of the radiator, or you had an engine that ran very poorly.

The later model "Fordson Major" had a temprature guage on the top of the radiator that took a lot of the guesswork out of setting the radiator blind.

Eric

Thanks for you're reply Graham I asked the ? for selfish reasons I've been casting arround for a long term project when I get my loco finished, and fancy doing something IC ish.

Stew

This will be worth waiting for

Neil

That's agood day's work. It woudl take me a week or two, and not look as good.

And I've spent seven years thinking about a Fordson Model F, and got no further than some half finished patterns and the gearbox internals.

Neil

Edited By Stub Mandrel on 27/08/2013 20:59:17

It's looking very lovely Gray, it will be a shame to paint it.

Unfortunately, I can't see a way of machining a bell housing that big in one piece. It may be feasible to do it in two halves, but nearly a foot long and mostly tapers...

Neil

I've just got to ask... Why the mixture of metric and BA sizes?

Ian P

Sump and crankcase parts look great Gray.

Just FYI Neil - the tapered endmills at the link below make machining draft angles a doddle and are not terribly expensive. Many angles from 1/2 degree to 15 degrees are available. The mill table capacity is the main factor to determine how large a housing can be machined.

**LINK**

JD

You don't hang about do you!! Looking very impressive so far.

What is your build plan? Do the engine then transmission and start to hang bits off that or will you break up the machining with a bit of sheet metal work now and then?

J

Gray,

I want to see this finished! Will it be ready for MMEX?

Neil

Gray ,off topic I know, But you don't have a profile. I was reading an old ME, about 1954 I think, there was an article about a lathe with two drive motors. Very good idea I thought. The chaps name was G Meek, any relation ? You must have been about 10 at the time.

Gray, I for one would be interested in any of the aspects of the tractors construction but would hate it to keep you out of the workshop.

J

Following along but not always commenting

> I type all the right letters but not necessarily in the right order,

I know exactly what you mean

Neil

Hi Gray,

>the mind is willing but my muscles aren't

Are you pushing yourself too hard?

Take some breaks, and write it up! I for one would be delighted to see this serialised.

Neil

> I also wonder if there is a need for articles on IC tractors.

I need them! In ME, please

the 1:4 tractor could potentially be a growth area for model engineering, as like traction engines they can pull you along, but unlike them they don't need a hugely expensive boiler.

Neil

Thanks Evan

Neil

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Novel use of the steering wheel as a starter handle.

Grey, as Jason says could be the start of something useful given the price of boilers and running

This is being built in an amazing fashion. Graham you are a true craftsman and I wish you great success with this. Are you making the drawings available?

I too have grandkids that keep me going on my projects, they are true gifts to us.