RC Truck and Construction  

Go Back   RC Truck and Construction > RC Truck's Ag and Industrial Equipment and Buildings > Construction Equipment

Construction Equipment If it digs, pushes, hauls dirt "off road" post it here.


Reply
 
Thread Tools Display Modes
  #21  
Old 03-18-2020, 06:57 PM
crueby crueby is offline
Newbie
 
Join Date: Mar 2019
Posts: 84
crueby is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Wow - lots of information on that link, thanks! Towards the bottom there was a link for 'More Pictures', on that second page there are a lot of plan views and detail drawings.
Reply With Quote
  #22  
Old 03-18-2020, 07:12 PM
frizzen's Avatar
frizzen frizzen is offline
Big Dawg On The Bone
 
Join Date: Jan 2016
Location: indy, indiana
Posts: 1,722
frizzen is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Those are looking great, that's going to be a really impressive truck
__________________
What do ya mean "Cars are neither Trucks or Construction"?
It's still scale, and i play fairly well with others, most of the time...
Reply With Quote
  #23  
Old 03-18-2020, 08:08 PM
Krewmember's Avatar
Krewmember Krewmember is offline
Newbie
 
Join Date: Feb 2015
Location: Southwest Ohio
Posts: 88
Krewmember is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Quote:
Originally Posted by crueby View Post
Wow - lots of information on that link, thanks! Towards the bottom there was a link for 'More Pictures', on that second page there are a lot of plan views and detail drawings.
Wow, good catch I can not believe I missed that
Reply With Quote
  #24  
Old 09-05-2021, 01:17 PM
Krewmember's Avatar
Krewmember Krewmember is offline
Newbie
 
Join Date: Feb 2015
Location: Southwest Ohio
Posts: 88
Krewmember is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

I'm back with a update on the Linn. I finally have some progress to show after a lot of research, I have a designed a prototype of the differential and final drives for the tractor. The trouble this entire build has been a lack of info, I quickly discovered that it is vary hard to find any technical or dimensional info about Linn tractors. I had a breakthrough when I found this post on the justoldtrucks forums by user 'Linntractornut' http://forums.justoldtrucks.com/2169...-Technical-etc in this post I found this image.



Its a scan of a Linn parts book! And of the differential and final drives big thanks to 'Linntractornut' of shaing this info. So I finally had something to scale off.

Here is a photo of the differential in the real thing.



I this designed a model in CAD to allow me 3d print a prototype and hopefully CNC finished parts out of aluminum.




Lots of failed prints and designs later...







I have this.










The differential is out of a 1/16 Traxxas E-revo and it is perfect size for this! I got the idea to use this differential from kerst's Liebherr LTM 1055 S-4 build. Thanks Kerst.

Now for the final drives gears I was going to cut my own as I now have a mill and indexing head but, I found that 48 Pitch gears which are commonly used in RC cars are perfect size. Using CAD I determined that a 12T pinion and 60t spur fits perfectly in the final drive case.



So this how it sits. I will be working on machining the half shafts and a drive shaft, finishing the other track and hooking up a motor so it can finally move under its own power!





-Shawn-
Reply With Quote
  #25  
Old 09-05-2021, 03:18 PM
jerry56 jerry56 is offline
Apprentice
 
Join Date: Apr 2019
Location: WV Panhandle
Posts: 459
jerry56 is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Glad to see this project alive and well....looking forward to seeing this one....
Reply With Quote
  #26  
Old 09-05-2021, 04:59 PM
Zabco Zabco is offline
Green Horn
 
Join Date: Sep 2016
Location: Pataskala, OH
Posts: 201
Zabco is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Really excellent design work! I love it. I usually end up with a pile of parts like that after a build also. Can't wait to see more.
Reply With Quote
  #27  
Old 09-07-2021, 08:51 PM
Jared Jared is offline
Green Horn
 
Join Date: Dec 2010
Location: Southwest Washington
Posts: 173
Jared is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

That's looking good! I'm looking at those phillips head screws, though. There's a site called microfasteners.com that sells small hex head nuts and bolts that would look real good on that case.
Reply With Quote
  #28  
Old 09-08-2021, 06:29 PM
Krewmember's Avatar
Krewmember Krewmember is offline
Newbie
 
Join Date: Feb 2015
Location: Southwest Ohio
Posts: 88
Krewmember is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Quote:
Originally Posted by Jared View Post
That's looking good! I'm looking at those phillips head screws, though. There's a site called microfasteners.com that sells small hex head nuts and bolts that would look real good on that case.
I agree with you, the phillips heads do not look that good, but are good for quick and cheap fastening of prototype parts.

I'm going replace most of the 3d printed parts for cast aluminum or CNC'd parts as part designs are finalized. At that point I will replace all the fasteners with hex head nuts and bolts. I hope to post more about the aluminum casting as I get tools and work flow setup.


Thanks for the tip about microfasteners.com it looks like that is I will be purchasing my fasteners at.


-Shawn-
Reply With Quote
  #29  
Old 09-26-2021, 08:12 AM
trilliwilli's Avatar
trilliwilli trilliwilli is offline
Wannabe
 
Join Date: Jul 2011
Location: Netherlands
Posts: 386
trilliwilli is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Well that is a coincedence. On the Dutch forum someone is also building a Linn logging truck.

I believe it is an older model, but the fact that it is a Linn truck is rare enough.

For the text you need Translate, but you can check the pictures: https://www.modelbouwforum.nl/thread...-truck.278238/
__________________
Greetings from Holland, William
Reply With Quote
  #30  
Old 09-30-2021, 12:45 PM
dremu dremu is offline
Newbie
 
Join Date: Aug 2019
Posts: 97
dremu is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

I'm still trying to wrap (pun intended) my head around the suspension. You're doing amazing work! I'm half-way (again, pun intended) doing a WWII half-track, and they pose a unique set of challenges.

I cheated and used a set of tracks from a robot kit (they're so cheap on Amazon/Fleabay it wasn't worth printing, and they're scaled pretty close), but otherwise not dissimilar to what you're doing. I think the track length is greater on those than on yours, so the suspension with its volute springs pushing on the bogies is simpler. Or at least better documented, lots of books about military stuff vs not so much for civvy.

The other pain I faced was that the front axle is driven, but the effective tire diameter of the track is much greater than the front tires (like 2.5x), so I couldn't use the same motor to drive the front axle as the tracks.

Oh, and it looks like you 3D printed the front leaf springs. Did you do them as one pack? I've done that for a coupla builds, with sufficient CAD work they *look* right, but I keep meaning to try printing individual leaves out of nylon and see if they are stronger / more accurate looking.

Anyway, wow, that's beautiful detail work, especially for parts that won't always be seen. I'll also be following with interest.

-- A
__________________
I mean, how hard can it be?
Reply With Quote
  #31  
Old 05-18-2022, 01:52 PM
ddmckee54 ddmckee54 is offline
Newbie
 
Join Date: Dec 2011
Posts: 127
ddmckee54 is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Shawn:

Any progress on the Linn?

Don
Reply With Quote
  #32  
Old 05-20-2022, 05:43 PM
Krewmember's Avatar
Krewmember Krewmember is offline
Newbie
 
Join Date: Feb 2015
Location: Southwest Ohio
Posts: 88
Krewmember is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Quote:
Originally Posted by ddmckee54 View Post
Shawn:

Any progress on the Linn?

Don
Not much I'm afraid. Unfortunately I have been on a hiatus from my projects due to having to move, All my tools are in storage (No room for them) I still have been doing CAD work and research for the Linn, my Gradall project and future projects (Hopto H-1900, Hopto H-700, Clark Michigan 175A, a tracked Gradall G-1000, Bucyrus-Erie 88-B) I have original manuals for them. I just need the time and space. Oh well maybe some day

I'm still here, just in the background. Thank you for your interest I hope I can show some progress soon.

-Shawn-
Reply With Quote
  #33  
Old 05-22-2022, 08:27 AM
jerry56 jerry56 is offline
Apprentice
 
Join Date: Apr 2019
Location: WV Panhandle
Posts: 459
jerry56 is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Understand about losing workshop space hope we get to see more of this one though....oh and this one Clark Michigan 175A... and this one..Bucyrus-Erie 88-B... LOL
Reply With Quote
  #34  
Old 05-22-2022, 09:34 AM
Krewmember's Avatar
Krewmember Krewmember is offline
Newbie
 
Join Date: Feb 2015
Location: Southwest Ohio
Posts: 88
Krewmember is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Quote:
Originally Posted by jerry56 View Post
Understand about losing workshop space hope we get to see more of this one though....oh and this one Clark Michigan 175A... and this one..Bucyrus-Erie 88-B... LOL
The 88-B would be quite a under taking for sure, the Michigan 175A should be pretty straight forward as it's quite simple in design.


-Shawn-
Reply With Quote
  #35  
Old 05-22-2022, 11:44 AM
jerry56 jerry56 is offline
Apprentice
 
Join Date: Apr 2019
Location: WV Panhandle
Posts: 459
jerry56 is on a distinguished road
Default Re: LINN Model DD-15 "HafTrak" Dump (1/14)

Lol... simple for you maybe....
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:29 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.