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Half scale model, is this possible?

Half scale model, is this possible?

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aaronloyet
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Though I still hope to get a Cat sometime in the near future, I am also thinking of the possibilities of building a half or third scale model that could be hauled more easily from Pennsylvania back to Illinois for plowing day at our farm.

I was thinking maybe a miniature version of the 40's era D7, using a compact diesel for the power. My question is, is it possible to fabricate a pony motor to start the diesel just like on the real ones? Possibly using pistons from a mini dirt bike or similar small engine like old lawn mower pistons?

Also, thinking the possibilities of making a replica D7N towing winch for it using a small truck winch in disguise inside another housing.

Has anyone ever built a replica Caterpillar that could give some advice and share your work and pics?

Thanks
Aaron
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Tue, Jan 26, 2021 10:11 AM
nomorejohndeere
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just get a D2
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Tue, Jan 26, 2021 11:42 AM
bboaz
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This was part of the 2018 National Show in San Antonio. Texas. This man was truly devoted to spend the time and money he did fabricating this machine. And a fine job he did. [attachment=61996]20181027_123536.jpg[/attachment] [attachment=61997]20181027_123603_001.jpg[/attachment]
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Tue, Jan 26, 2021 12:00 PM
d2gary
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Reply to bboaz:
This was part of the 2018 National Show in San Antonio. Texas. This man was truly devoted to spend the time and money he did fabricating this machine. And a fine job he did. [attachment=61996]20181027_123536.jpg[/attachment] [attachment=61997]20181027_123603_001.jpg[/attachment]
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Check out this guys work, it might make you want to go full size. Looks like a tremendous amount of work.
https://youtu.be/k3Mf8pyTt8A
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Tue, Jan 26, 2021 9:34 PM
crookedwrench
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Haul a D2 to Plow Day and pull three 14”s with the big boys!
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Thu, Jan 28, 2021 10:27 AM
kittyman1
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Reply to crookedwrench:
Haul a D2 to Plow Day and pull three 14”s with the big boys!
I agree with all the previous comments, really good thoughts...

-building something from scratch is a serious commitment...a ton of time, effort, engineering, money, fabricating....please realize the can of worms you are opening !

- far better off purchasing what you want, need, the first time. it costs plenty just restoring and repairing alone!
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Thu, Jan 28, 2021 12:12 PM
crookedwrench
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Reply to crookedwrench:
Haul a D2 to Plow Day and pull three 14”s with the big boys!
Plowing with the D2
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Thu, Jan 28, 2021 10:59 PM
edb
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Reply to crookedwrench:
Plowing with the D2
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Hi,
it certainly is possible a quick Google found this unit.

https://makezine.com/2015/02/17/dad-builds-mini-bulldozer-from-lawnmower-parts/

I recall another that appeared at one of the shows that was more lifelike but so far have not been able to locate a video of it.
Cheers,
Eddie B.
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Fri, Jan 29, 2021 9:00 AM
aaronloyet
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A D2 has definitely crossed my mind, but still a fairly heavy guy to haul over the hills we have here to get it home. with a home made, I could condense the weight a ton or two. would be a great expense for sure as well as time, but would be fun to take my other hobby of building/modifying Cat models to doing one on a much larger scale.

My goal one day would be to own an RD-4, that is the crawler my uncle had that started this journey, but they are getting tougher to find it seems.
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Sat, Jan 30, 2021 8:56 AM
trainzkid88
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Reply to aaronloyet:
A D2 has definitely crossed my mind, but still a fairly heavy guy to haul over the hills we have here to get it home. with a home made, I could condense the weight a ton or two. would be a great expense for sure as well as time, but would be fun to take my other hobby of building/modifying Cat models to doing one on a much larger scale.

My goal one day would be to own an RD-4, that is the crawler my uncle had that started this journey, but they are getting tougher to find it seems.
building a half size crawler is a huge amount of work.

as others have said its definitely easier to get a d2 or a holt 2 ton as they are the baby machines and even they take a lot of work if you want to go the whole hog full strip down and rebuild route. we were lucky with our d4 which is only 5 tonne wringing wet. d2's are small enough to shift on a car trailer or a small body truck they only weigh around 8000lb

"i reject your reality and substitute my own" - adam savage. i suspect my final words maybe "well shit, that didnt work"

instead of perfection some times we just have to accept practicality

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Sat, Jan 30, 2021 4:51 PM
side-seat
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As far as models go; We have a RC scale model digging show at the Lebanon County PA Fairgrounds every January. Only this year it was cancelled due to Covid19
The show is called Cabin Fever Expo https://www.cabinfeverexpo.com/
I've been going since the beginning and about 10yrs ago I started the RC construction dirt pile with my 1/16th scale walking dragline and a couple others with their 1/14th scale trucks and now it has turned into the largest RC truck and construction show in the USA . Last year there was close to 350 pieces of equipment working digging and hauling in our group not to mention all of the scale model engineering exhibitors. Over the years there has been some half or quarter scale tractors displayed.
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Sun, Jan 31, 2021 12:43 AM
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