Jetboats Various puller builds

J

jetboat

Well-Known Member
Instead of cluttering things up I thought I would just do 1 thread.

Garden Tractor evolution (Project Murray)

I started the build with a piece of left over 3x2x1/8" Aluminum


1525356_10200447054979071_1690484699_n by actcrazyitsfun, on Flickr

Machining a front axle (this particular one didnt work out)


1497597_10200456701180220_1402351841_n by actcrazyitsfun, on Flickr

Hitch Version 1

1488155_10200451167441880_1376373231_n by actcrazyitsfun, on Flickr

Front Axle Version 1 (didnt work)


1012837_10200456701020216_449338396_n by actcrazyitsfun, on Flickr

Hitch V1

72303_10200451391967493_620494500_n by actcrazyitsfun, on Flickr

Chassis V1

1497603_10200462415163066_1415548525_n by actcrazyitsfun, on Flickr


Murray V1

IMG_6068 by actcrazyitsfun, on Flickr


Test Pulls (Runs made by someone that had never seen RC pulling and now wants one)

IMG_6062 by actcrazyitsfun, on Flickr
 
J

jetboat

Well-Known Member
After testing the tractor and getting ThunderVP's feedback, I made some changes.

again I started with a blank piece of 3x2x1/8"

1520616_10200537918370599_1041157917_n by actcrazyitsfun, on Flickr

Rough cut it and checked fitment. You'll notice the rear axle is moved back and down

1522064_10200538551666431_770985641_n by actcrazyitsfun, on Flickr

New hitch, made from Delrin with a slot for the hitch instead of holes (better adjustments)

IMG_6073 by actcrazyitsfun, on Flickr

I used a 1/2"x3/4" L bracket for the hitch

IMG_6072 by actcrazyitsfun, on Flickr

Weight all moved forward. The top weight tucks under the body so its not seen. You'll also notice a new front axle.

IMG_6084 by actcrazyitsfun, on Flickr


IMG_6083 by actcrazyitsfun, on Flickr
 
J

jetboat

Well-Known Member
Garden Tractor V3
I was asked by the owner of the facility we use for crawling and pulling (Dirt pulling track coming in spring) to build him a Garden Tractor so, I evolved the design.


The Chassis is made from 3/16 aluminum (I think its a little thick), gear pod is from 2"x2"x1/8" aluminum. Front Axle is made from 1"x1/4" aluminum and is 95mm wide (I think) and setup for Tamiya or Traxxas bearing carriers/axles. The gear pod is drilled for a 1/2"x1/4" bearing


IMG_6077 by actcrazyitsfun, on Flickr


IMG_6078 by actcrazyitsfun, on Flickr


IMG_6079 by actcrazyitsfun, on Flickr

I love how the hitch came out but, its way too heavy. I've ordered 1/2" Delrin to replace it with.
 
J

jetboat

Well-Known Member
Now I've moved to building myself a Pro Mod 2wd

I used 1/4"x 1 3/4" Aluminum for the base chassis. I think I should have used 3/16" Gear pods are made out of 2"x2"x1/8" aluminum. The front gear drive is drilled for a 1/2"x1/4" bearing and Ill be using a shaft from Outlaw Hobbie. The rear axle is a 3/8" shaft with 7/8"x3/8" bearings. The front axle is built from the same 1"x1/4" stock that I have started using for the garden tractor axles. The difference's are that this axle is 115mm wide and setup to bolt the servo straight to it.


IMG_6082 by actcrazyitsfun, on Flickr


IMG_6081 by actcrazyitsfun, on Flickr
 
nrctpaXpres

nrctpaXpres

Well-Known Member
this is a good way to do it....I would put a plate over the 2 movable (axle) pieces to make them more rigid...that's what I'd do..infact did to a Outlaw chassis which is similar in design

pulling is a huge kick in the pants for sure.
 
J

jetboat

Well-Known Member
a top plate is in the plan, it just turned too cold to be out in the garage (even with the heater on).
 
T

Thunder VP

Well-Known Member
V3 is looking really good. A little practice makes perfect!

1/2" Delrin for the hitch plate is a little overkill. I was using 3/8" but have moved down to 1/4" for the GT. Still use 3/8" on the Pro Mod.
 
J

jetboat

Well-Known Member
You know me, I'm all about overkill. I cut the new hitch tonight from white 1/2"... It is a major improvement over the first hitch, even if it is a little thick. I might pull it off tomorrow and machine it down to 3/8".
 
J

jetboat

Well-Known Member
About time for some updates:

I finished the V3 Garden Tractor and presented it to the "customer" and he decided he isnt into pulling. So, now I need to figure out what Iamgoing to do with it...


IMG_6231 by actcrazyitsfun, on Flickr


IMG_6232 by actcrazyitsfun, on Flickr


Here's some pictures of the pro mod before I tried it out... with my mill broke I never was able to make the top plate. The rear gear made it until the second run.


IMG_6227 by actcrazyitsfun, on Flickr

After some major changes to the gear box and some homemade weights.

IMG_6240 by actcrazyitsfun, on Flickr


IMG_6242 by actcrazyitsfun, on Flickr

The tires on the Pro Mod have to go... first run, they threw chunks off.
 
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