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Old 04-17-2010, 05:26 AM   #11
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Default Re: 1/4 Scale IHC Famous 3hp

Oh duh. It's the engine in your avatar picture...

Dang cold medicine making me loopy.



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Old 04-17-2010, 06:27 AM   #12
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Default Re: 1/4 Scale IHC Famous 3hp

Dont feel bad Dave, I only just worked out how to put it there, it wasnt there on your post. The one in my pic is a 2hp I did up a while ago.

Lance



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Old 04-29-2010, 05:39 AM   #13
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Default Re: 1/4 Scale IHC Famous 3hp

Whoooooops! Today I got back to the Famous and made a major stuff up.
I had the ports bored into the head and the valve guides drilled and decided to drill down the valve guides (using them as a Pilot hole) and form the valve seats. When the drill hit the port it shot off sideways, towards the port and wrecked the head.
Head no2 is on the way (Bugger)
I will this time drill the valve guides, Cut the valve seats then drill the ports at right angles.
I am also taking lessons in Autosketch so hopefully I can see what may go wrong before it does.
That Autosketch is amazing! I was scared of it until now, but now nothing will get made until I can draw it up first.
This might take a while but Im learning heaps.

Lance

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Old 04-30-2010, 07:22 AM   #14
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Default Re: 1/4 Scale IHC Famous 3hp

Lance,

Rename "Infamous" Sorry about the whoooooops. I keep promising myself my next engine will be without them; but it's a hopeless cause.

Best Regards
Bob

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Old 11-15-2010, 04:29 AM   #15
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Default Re: 1/4 Scale IHC Famous 3hp

Well, I haven't died but things got very busy here and the Famous had to take the back burner for a while.
I was having difficulty getting everything done correctly with a lathe and a pedestal drill so I saved my pennies and bought a small milling machine.
I had been lurking while I learnt some of the basics of Autosketch but have now gone with Alibre so its sort of like starting again.

I have drilled the holes for the head bolts and the cooling passage and had a think about the stainless bore after Tin's coment and I think he is right and bored it out so we are back to a cast bore of approx 0.125" which leaves me a cooling jacket of approx .0125 as well.
I also machined the flats on the botton of the cylinder.
I suppose its not a race eh?

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Old 11-15-2010, 04:31 AM   #16
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Default Re: 1/4 Scale IHC Famous 3hp

The no 141 is the start of the new head.

Lance

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Old 11-15-2010, 07:36 PM   #17
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Default Re: 1/4 Scale IHC Famous 3hp

Today I got started on the cylinder head and plotted the holes for the head bolts and drilled them and made the coolant hole.
hopefully will continue later.

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Old 11-15-2010, 07:44 PM   #18
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Default Re: 1/4 Scale IHC Famous 3hp

The famous engine flywheels are a challenge so I borrowed a small flywheel from a friend and poured a couple from old John Deere pistons. The rough cast is the second one and the machined one is going to be tidied up and used only as a pattern. Im not that pleased with the outcome but have bought some Petrobond sand and will tidy them up and do another pour before I get the final useable product.
Being an IHC famous perhaps I should look for some old inter pistons
By the way the rubber fuel hose on the 2 spokes is a look at making them fatter again for the next casting. Not sure if I will go ahead with that one yet.

Lance

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Old 11-17-2010, 05:18 AM   #19
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Default Re: 1/4 Scale IHC Famous 3hp

Today I got a little more time on the head, machining the valve recesses, the small hole at the rear is for the air fuel mix to get to the ignitor.
Sorry about the picture quality, I didnt realise it was so poor until it was on a computer screen. It looked fine without my glasses on the screen on the camera.

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Old 11-17-2010, 06:25 AM   #20
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Default Re: 1/4 Scale IHC Famous 3hp

Good to see this one under way again. I am building a 1/5th scale one from castings for someone (see my thread in the "engines from castings section" and I am also going to scale these upto 1/4 to make my own engine. I have already welded up most of the base.

Jason



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