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    Chrysler Hemi 1/4 scale

    I don’t think chamber volum and comp ration will scale properly it would be best to adjust the piston and chamber to give a functional ratio according to the fuel being used if pump gas is suggest around 9.5 pistons and rings this size are not the easiest things to make as it is. Plain cast iron...
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    Another Radial - this time 18 Cylinders

    Hi. im just getting started on Solid works modeling of this cool engine. It’s a bit overwhelming at first but your nice description and pictures really are helping. I’m used to building 2-3000 hp Hemi Engine not something micro miniature. One of my sons just bought a new mill and lathe. Not full...
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    Putting some grip (stippling) on an aluminium drive pulley.

    I guess I missed the video. But I’ve run aluminum veerepulleys on cars to where they broke s flange off. Usually breaking the belt too.if the belt is slipping it’s usually caused b6 not enough wrap around the pulley. As I recall the rule was less than 90 deg included angle. The most I ever did...
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    fuel mixture issues. stuart 400 replica build.

    I thing you would be best going to a small engine carb. Tilotson or walboro. Most carbs operate on 4-5 psi max. Small engines even less. These are float carbs. To me it sounds like you have too much spark advance.even our big v8 have pretty short advance that is automatically advanced as speed...
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    Fuel for Model Engines

    The nice thing about running on alcohol is that air fuel rations are not particularly critical. Basically if you have enough compression, fuel and spark it will run.. as with any fuel there is a range it works best in but no where as critical as gasoline.its hard on parts in the fuel system...
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    (CAD) 28 Cyl P&W R-4360

    it appears that it’s been awhile since you last posted so many of ure waiting on your progress. i spent many years building scale model rc aircraft. Along the way I discovered that many things don’t “scale” very well and are often mis scaled in terms of reality. For example aircraft panel...
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    Fuel for Model Engines

    If you can get friendly with either kart racers or sprint car racers, you can usually make a deal on larger quantities. We ran alcohol in our funny car for a number of years. I f I remember right it was about $2 per gallon in 55 gallon drums. Home land security now regulates the quantities you...
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    (CAD) 28 Cyl P&W R-4360

    that’s interesting. When I decide to go back to engineering school I had an instructor who was a marathon runner for metallurgy. He came into class and jumped on the table like it was a stepping stone and pointed to the large yellow teaching slide rule hanging over the chalk board. He look the...
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    (CAD) 28 Cyl P&W R-4360

    My Corsair took a while to build due to family moves. One thing many rc scale builders don’t do is research the full scale flight characteristics. They don’t always “scale exactly”but often are close. It’s easy to have more than enough power in these models so dealing with this is an issue. But...
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    (CAD) 28 Cyl P&W R-4360

    This thread is pretty old but extremely interesting. to the original thread starter,,,,afte4 reading your interest and beginnings I’d strongly recommend obtain8ng a set of Lee Hogson’s 18 cylinder model. He has a very good knowledge of building the model as well as a lifetime machinist. Exile...
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    (CAD) 28 Cyl P&W R-4360

    Small stroke engines use the crank case vacuum pulses to operate a fuel pump. This allows the chainsaw to operate in any position.sorry if I wasn’t clear on this. Some model engines us this to operate a pulse controlled fuel pump . I’ve use$ these many times on very high performance model...
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    (CAD) 28 Cyl P&W R-4360

    I suppose with 18 cylinders going up and dow you would have a relatively even vacuum. However gas carbs depend on the strong vacuum pulse to pull fuel from the tank.there have been many two stroke radials made from two stroke rods and pistons so it might work. It’s a lo5 of work making a...
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    (CAD) 28 Cyl P&W R-4360

    I’m sorry for my poor spelling. I have a medical condition that leaves me with double vision . So typing is extremely difficult. I have to squint some times and even closing one eye doesn’t help. In the shop I have to be very careful too. thanks byron
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    Trying to understand cam shaft gearing. Help needed.

    After the correct rotation ratio is determined you will need the cam specs. Usually USA cams are spec Ed at.050”lift then degreed from there. Unknown cams may be from the old days so may be degreed from the very start of lift. It’s very hard to work with this so It might be best the work...
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    (CAD) 28 Cyl P&W R-4360

    Once again I’ll add some of my interest and dealings. I built a 1/5 give or take scale model of a Corsair. f4u-1d. At the time I debated whether to make it an F2 G . It would have allowed adding about an inch to the nose. Which would have been easy just by moving the cowl forward. I hsdnot...
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    (CAD) 28 Cyl P&W R-4360

    I to have a Pashto also interest intert in this engine. I would enjoy trading email and thoughts. Post if you would like to participate. I’ll try and watch here daily byron
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    (CAD) 28 Cyl P&W R-4360

    I would really like to correspond with you on this project as I have a keen interest in the 4360 to an as a model. . I can give you an email address if you like just add request to this post byron nelson
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    Know where your fingers are---

    Machines are not the only means of human brutllaity......human to human contact is pretty dangerous too. I played hockey until, I was 26, one night with my wife to be sitting at the blue line....no glass back then, I got high sticked by some scrawny wingman right in front of her .i went down...
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    My Hodgson 9 Radial Final Assembly

    Nice work and thanks fir the tips. I’m just getting started on modeling parts for review. I’ll have to read this over several times to take it all in. .i especially like the metallurgical comments.i still don’t really follow the cylinder head work. I guess I’ll just have to work on it myself...
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    (CAD) 28 Cyl P&W R-4360

    I read an account of a flight engineer crawling out in the wig to replace a burned out generator. Bag of tools and a big generator. Must have been an ordeal even then. Terribly noisy.
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