Inertia starter

This forum is for the Fordson New Major, including the Super Major and the Power Major.
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Kjetil
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Posts: 99
Joined: Wed Jul 02, 2008 3:20 pm
Location: Norway

Inertia starter

Post by Kjetil »

Hi

I bought an Inertia Starter on ebay, but I am not quite sure if it is an Inertia Starter.

For me it perform more like a Spring Loaded Starter. Anyone knows if Simms produced a Spring Loaded Starter?

The reason is; when I turn the handle I got the feeling af winding up a spring.

The Major Operator Handbook say:

Apply steady but gentle pressure for the first heavy turn, the gradually increase the winding speed until a "buzzing" noise ......

I am able to make a few turn, gradualy going heavier, and then stops, no "buzzing" noise.

Inertia Starters were also discussed on the old forum:
http://www.fordsontractorpages.nl/ubb/F ... 00726.html

Any helps welcome.

Regards Kjetil

Tmac
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Re: Inertia starter

Post by Tmac »

I just dont think its a spring job.

When wound up you should be able to put your hand on it and feel it vibrate like a motor running.

These starters have been around in use for a long time, mainly used on large aircraft engines. Some of the later ones used a electric motor to wind them up.

How they work is that the starter contains a small heavy flywheel. This flywheel is then wound by a gear train up to about 50,000 rpm (range 20,000 to 60,000rpm) for small starters. When at run speed this flywheel is then engaged to the starter bendix/gearshaft with some sort external actuator. With the kinetic energy that has been built up in the flywheel being applied through a reduction gear train to the starter gear. The engagement may be either through a disc clutch or a dog. The ones that have a clutch will give off a definite screeching sound when activated. If you have ever seen, either in flick or for real this is what is heard when those old big aircraft engines were started.

These inertia starter motors are basically the same in principle as those old tin toys that you push the wheels on the floor a few times to make run, then release to go a few feet. The more you push them the faster and farther they will go!! ;)






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Kjetil
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Posts: 99
Joined: Wed Jul 02, 2008 3:20 pm
Location: Norway

Re: Inertia starter

Post by Kjetil »

I am not able to feel any vibrations. I came across a Simms paper, and they produced a spring starter.

http://digitalvault.telioworld.com/invi ... mg&lang=en

Anybody knows who produced the inertia starter for the Major?

Kjetil

Brian
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Re: Inertia starter

Post by Brian »

Think that the title "Inertia Starter" might be incorrect although that is the word used in the article posted by Stefan and that is how I seem to remember it being described. However Tmac has the description of operation exactly right for a true "Inertia Starter".

The spring action one is the one I have come across on Majors. Lucas, Simms and CAV were all part of the same company.
Fordson Tractor Pages, now officially linked to: Fordson Tractor Club of Australia, Ford and Fordson Association and Blue Force.
Brian

Kjetil
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Posts: 99
Joined: Wed Jul 02, 2008 3:20 pm
Location: Norway

Re: Inertia starter

Post by Kjetil »

Good to see you back Brian. Havent seen comments for a long time.

Do you know who made the Inertia starter for Fordson?

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