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Taalasmaa 01-25-2013 12:00 PM

Tracked FG Monster. About 900mm long!
 
Hello!

As a starter, I got to apologiize for my bad english skills. In Finland, we don't speak english that much.

I've been building RC planes for about 20years, but I just can't fly them. I've been racign with boats for 15 years, and started with cars for 6 years ago.



I disliked the ability to run in snow, of the stock FG. So, I decided to build tracks.

The tracks are built of two 10B rollerchains, linked via 80mm long 20x20x1.5 alu U profiles.


Story with pics:

<div></div><div></div><div></div><div>I took the rollerchains from a Juko XJ100 sugarbeet machine. The longest chain was about 5m.
</div><div>http://i1.aijaa.com/b/00104/11546596.jpg
</div><div>The track bodies, I made.</div><div></div><div>http://i8.aijaa.com/b/00975/11546600.jpg</div><div></div><div>Mock-up of the track chains</div><div></div><div>http://i3.aijaa.com/b/00257/11546605.jpg</div><div></div><div>Welded sprockets. I used an electrode welder (elektrod svets)
</div><div>http://i4.aijaa.com/b/00324/11546609.jpg</div><div></div><div>Chains, sprockets and a screwdriver.</div><div></div><div>http://i3.aijaa.com/b/00782/11546611.jpg</div><div></div><div>Rear view.</div><div></div><div>http://i5.aijaa.com/b/00727/11546615.jpg</div><div></div><div>The front 10T 10B sprockets. I machined a 12mm hole in them.</div><div></div><div>http://i9.aijaa.com/b/00636/11546617.jpg</div><div></div><div>Yksi ketju paikoillaan, auttanee hahmottelussa.</div><div></div><div>http://i9.aijaa.com/b/00483/11546620.jpg</div><div></div><div>Both chains fitted.</div><div></div><div>http://i9.aijaa.com/b/00259/11546621.jpg</div><div></div><div>http://i7.aijaa.com/b/00549/11546622.jpg</div><div></div><div></div><div><div></div><div>Took a pic fo the track body, when it was dismounted.</div><div></div><div>http://i3.aijaa.com/b/00138/11553252.jpg</div><div></div><div>I removed every other tooth from the sprockets.</div><div></div><div>The bigger boch is for removal of the tooths, and the smaller is to make it look</div><div></div><div>http://i10.aijaa.com/b/00157/11553265.jpg</div><div></div><div>http://i7.aijaa.com/b/00806/11553267.jpg</div><div></div><div>[size=24pt]Remember safety goggles! [/size]</div><div></div><div>The finished sprocket.</div><div></div><div>http://i2.aijaa.com/b/00665/11553253.jpg</div><div></div><div>http://i7.aijaa.com/b/00450/11553254.jpg</div><div></div><div>A bad quality picture.</div><div></div><div>http://i5.aijaa.com/b/00147/11553255.jpg</div><div>
The left sprocket</div><div></div><div></div><div>http://i8.aijaa.com/b/00921/11553283.jpg</div><div>
The right sprocket<br type="_moz" /></div><div></div><div>http://i2.aijaa.com/b/00566/11553278.jpg</div><div></div><div>Rear view. Both sprockets modified.</div><div></div><div>http://i11.aijaa.com/b/00303/11553274.jpg</div><div></div><div>Test fitting</div><div></div><div>http://i7.aijaa.com/b/00732/11553287.jpg</div><div></div><div>http://i1.aijaa.com/b/00012/11553291.jpg</div><div></div><div>Fits perfectly</div><div></div><div>http://i4.aijaa.com/b/00863/11553301.jpg</div><div></div><div>Size comparison</div><div></div><div>http://i5.aijaa.com/b/00429/11553305.jpg</div><div></div><div>The smaller sprockets</div><div></div><div>http://i10.aijaa.com/b/00097/11553310.jpg</div><div></div><div>I used my lathe to make washers.</div><div></div><div>http://i6.aijaa.com/b/00990/11553314.jpg</div><div></div><div>The first time I used my dremel.</div><div></div><div>http://i2.aijaa.com/b/00787/11553319.jpg</div><div></div><div>http://i2.aijaa.com/b/00770/11553325.jpg

<div></div><div>http://i7.aijaa.com/b/00075/11650630.jpg</div><div></div><div>Measiring, and marking..</div><div></div><div>http://i2.aijaa.com/b/00791/11650631.jpg</div><div>http://i11.aijaa.com/b/00733/11650632.jpg</div><div></div><div>My gigantic phone, size comparison.</div><div></div><div>http://i6.aijaa.com/b/00244/11650634.jpg</div><div></div><div>I bought three LED 800lm lights for the car.</div><div></div><div>http://www.ikh.fi/TYOVALO_LED_10W_FLOOD</div><div></div><div></div><div>http://i7.aijaa.com/b/00075/11650630.jpg</div><div>http://i2.aijaa.com/b/00791/11650631.jpg</div><div>http://i11.aijaa.com/b/00733/11650632.jpg</div><div>http://i6.aijaa.com/b/00244/11650634.jpg</div><div>http://i6.aijaa.com/b/00325/11650642.jpg</div><div>http://i2.aijaa.com/b/00244/11650636.jpg</div><div>http://i8.aijaa.com/b/00772/11650637.jpg</div><div>http://i2.aijaa.com/b/00681/11650640.jpg</div><div>http://i8.aijaa.com/b/00428/11650643.jpg

<div></div><div></div><div>Machinigh the front sprockets</div><div>http://i5.aijaa.com/b/00609/11673414.jpg</div><div></div><div>One track mounted. I also made a rotating table for the car.</div><div></div><div>http://i9.aijaa.com/b/00630/11673415.jpg</div><div></div><div>Thge rollbar.</div><div></div><div>http://i4.aijaa.com/b/00408/11673416.jpg</div><div>http://i3.aijaa.com/b/00990/11673417.jpg</div><div></div><div>LED work light's
</div><div>http://i8.aijaa.com/b/00374/11673418.jpg</div><div>http://i4.aijaa.com/b/00827/11673419.jpg</div><div>http://i8.aijaa.com/b/00163/11673420.jpg</div><div>http://i4.aijaa.com/b/00480/11673421.jpg</div><div></div><div>I modified the rear mounting of the rollbar.
</div></div><div>http://i11.aijaa.com/b/00277/11680131.jpg</div><div>http://i5.aijaa.com/b/00373/11680137.jpg</div><div></div><div></div><div>Steering servo test-fitted in the radio box</div><div></div><div>http://i1.aijaa.com/b/00501/11680138.jpg</div><div></div><div>Pics of my other projects. DB 990 tractor</div><div></div><div>http://i5.aijaa.com/b/00847/11680132.jpg</div><div></div><div>Gas cat, with 26cc zenoah outboard</div><div></div><div>http://i5.aijaa.com/b/00461/11680133.jpg</div><div>http://i7.aijaa.com/b/00125/11680134.jpg</div><div></div><div>EP boat
</div><div>http://i1.aijaa.com/b/00136/11680136.jpg</div><div>
I made a tensioner. My Giga Crusher DF (new project) as a size comparison. Note. The Giga Crusher DF is a HUGE 1:8 scale monster truck.

<div>http://i8.aijaa.com/b/00441/11729677.jpg</div><div></div><div>http://i1.aijaa.com/b/00982/11729678.jpg

The ohter track finished. Ill make the tensioner tomorrow.

<div>http://i2.aijaa.com/b/00954/11751222.jpg</div><div>http://i1.aijaa.com/b/00672/11751220.jpg</div></div></div></div><div></div></div>

bbuzzard 01-25-2013 12:45 PM

RE: Tracked FG Monster. About 900mm long!
 
Nice!! I can't wait to see some video of that beast running!

Lars from Norway 01-25-2013 03:14 PM

RE: Tracked FG Monster. About 900mm long!
 
This is exactly what i like with rc's, making and modyfying things yourself :) Are you going to use the brakes to steer it? That is a pretty easy way to do it, just put the brake servo on the steering "channel" and when you turn to the right the right side will brake and the diff does the rest :) Looking forward to see more from you!

Taalasmaa 01-25-2013 11:40 PM

RE: Tracked FG Monster. About 900mm long!
 


ORIGINAL: Lars from Norway

This is exactly what i like with rc's, making and modyfying things yourself :) Are you going to use the brakes to steer it? That is a pretty easy way to do it, just put the brake servo on the steering "channel" and when you turn to the right the right side will brake and the diff does the rest :) Looking forward to see more from you!
Hey,

I am going to do the steering exactly like you said. Brakes on both sides of the diff.
<br type="_moz" />

Taalasmaa 01-26-2013 12:49 PM

RE: Tracked FG Monster. About 900mm long!
 
I've worked on the tracked vehicle (can't call it a car anymore) a bit today.

<div></div><div>I milled from the front 10t 10B (5/8") chain sprockets the every-other tooth away.</div><div>http://i5.aijaa.com/b/00609/11673414.jpg</div><div></div><div>One track test-fitted. I also builded a rotating table for the car, because it's getting heavy &amp; too big to keep on my knee.</div><div></div><div>http://i9.aijaa.com/b/00630/11673415.jpg</div><div></div><div>I also built a stornger rollbar of 10x40mm iron, and those round iron bars that you put into concrete. Sunno what they're called in english. Betongj&auml;rn in swedish.
</div><div>http://i4.aijaa.com/b/00408/11673416.jpg</div><div>http://i3.aijaa.com/b/00990/11673417.jpg</div><div></div><div>My lights, and the rollbar.</div><div></div><div>http://i8.aijaa.com/b/00374/11673418.jpg</div><div>http://i4.aijaa.com/b/00827/11673419.jpg</div><div>http://i8.aijaa.com/b/00163/11673420.jpg</div><div>http://i4.aijaa.com/b/00480/11673421.jpg</div>

I'll work on the vehicle abit more tomorrow.<br type="_moz" />

Lars from Norway 01-26-2013 03:35 PM

RE: Tracked FG Monster. About 900mm long!
 
It is called rebar in english, and armeringsjern in norwegian:)

I like what i see! But are you going to have some rollerwheels (or what to call it) between the front and rear-wheels? Atleast something that keeps the tracks tensioned?

rangerfredbob 01-26-2013 08:48 PM

RE: Tracked FG Monster. About 900mm long!
 
With only front suspension and the width fixed the suspension is going to bind or push out on the outer rails unless at least one side has freedom to move in and out a little (I imagine it'll move around 2mm per side), if the side rails are wood you can probably get away with them being rigid mounted but not if they're metal.

Other than that, interesting build!

Taalasmaa 01-26-2013 10:54 PM

RE: Tracked FG Monster. About 900mm long!
 
Im goign to remove the front suspension and add some smaller wheels, maybe with suspension. Not sure yet. I dont need to drive 60km/h onto a snow wall, and jump 5m. Just the capability to drive in snow and terrain is the whole idea of this project.

Taalasmaa 01-27-2013 10:48 AM

RE: Tracked FG Monster. About 900mm long!
 
<div>There has been some progress today. I modified the rear end of my rollbar, to be easier to remove.</div><div></div><div>http://i11.aijaa.com/b/00277/11680131.jpg</div><div>http://i5.aijaa.com/b/00373/11680137.jpg</div><div></div><div></div><div>I test fitted the steering servo in the radio box.</div><div></div><div>http://i1.aijaa.com/b/00501/11680138.jpg</div><div>

I got nearly halfway of the second track today, but unfortunately the aluminuim profile ended.

</div><div>Photos of my other projects.

David Brown 990, tractor</div><div></div><div>http://i5.aijaa.com/b/00847/11680132.jpg</div><div></div><div>A new racing boat, with a 26cc Zenoah outboard. Arrowshark G-Drive.</div><div></div><div>http://i5.aijaa.com/b/00461/11680133.jpg</div><div>http://i7.aijaa.com/b/00125/11680134.jpg</div><div></div><div>And an electric boat, with 6S, MambaMonsterMax, and a chinese 4600kv brushless engine.</div><div></div><div>http://i1.aijaa.com/b/00136/11680136.jpg</div><div>



</div>

Taalasmaa 02-07-2013 07:02 AM

RE: Tracked FG Monster. About 900mm long!
 
Finally, I finished the first track.
<div></div><div>http://i6.aijaa.com/b/00612/11739436.jpg</div><div>http://i6.aijaa.com/b/00015/11739437.jpg</div><div>http://i6.aijaa.com/b/00778/11739438.jpg</div><div>http://i2.aijaa.com/b/00890/11739439.jpg</div><div>
My amazing drawing skills</div><div></div><div>http://i11.aijaa.com/b/00471/11739440.jpg</div><div></div><div></div><div>I don't think I posted a pic from underneath?</div><div></div><div>http://i3.aijaa.com/b/00306/11739441.jpg</div><div></div><div></div><div>I started making the other side</div><div></div><div>http://i9.aijaa.com/b/00226/11739443.jpg</div><div>http://i9.aijaa.com/b/00279/11739444.jpg</div><div>http://i7.aijaa.com/b/00083/11739445.jpg</div><div>http://i2.aijaa.com/b/00129/11739447.jpg</div><div>http://i6.aijaa.com/b/00784/11739450.jpg</div><div></div><div>Now, Ill go back to assemble the other track itself.</div>

Lars from Norway 02-07-2013 03:09 PM

RE: Tracked FG Monster. About 900mm long!
 
Awesome! Can't wait to see more here :)

Taalasmaa 02-09-2013 08:50 AM

RE: Tracked FG Monster. About 900mm long!
 
The second track finished. Ill make the tensioner tomorrow.<div>
</div><div>http://i2.aijaa.com/b/00954/11751222.jpg</div><div>http://i1.aijaa.com/b/00672/11751220.jpg</div>

Taalasmaa 02-09-2013 09:18 AM

RE: Tracked FG Monster. About 900mm long!
 
I still need to invent a brake system. Any ideas, anyone?

Lars from Norway 02-09-2013 03:21 PM

RE: Tracked FG Monster. About 900mm long!
 
It is already invented, all you have to do is to make it, just take a look [link=http://www.youtube.com/watch?v=inDBBwxnYv8]here[/link] :) I think this will work fine for you!

Taalasmaa 02-09-2013 11:17 PM

RE: Tracked FG Monster. About 900mm long!
 
How can I brake my diff on the both sides?<div>
</div><div>This vehicle is steering, by braking. Braking the left side, it turns to the left. Braking the right side, it turns to the right.</div><div>
</div><div>Like a tank, or excavator.</div>

Mudgy 02-10-2013 02:16 AM

RE: Tracked FG Monster. About 900mm long!
 
throttle/brake as Lars found ... band brake on the bell

steering via L & R disc on the wheel hub - servos just operate each disc .......your diff will be super loaded up carrying that weight

GT100 02-10-2013 07:44 AM

RE: Tracked FG Monster. About 900mm long!
 
I'm thinking rear disc cable brakes on each rear hub and a steering servo with a large enough horn that when you turn one way, the servo will apply pressure to one side and lock that wheel. When you turn the other way, the servo will apply pressure that the other wheel and lock it.
Basically, run the cable from each broke to opposite sides of the horn. To accomplish this, your diff will have to be very loose. Very little grease in it. Just enough to keep it lubed but have it unload when the diff turns.

Taalasmaa 02-10-2013 09:49 AM

RE: Tracked FG Monster. About 900mm long!
 
I removed the tensioners, and made the chain shorter.

<div>http://i3.aijaa.com/b/00186/11757721.jpg</div><div>http://i6.aijaa.com/b/00919/11757720.jpg</div>

Lars from Norway 02-10-2013 04:13 PM

RE: Tracked FG Monster. About 900mm long!
 


ORIGINAL: Taalasmaa

How can I brake my diff on the both sides?<div>
</div><div>This vehicle is steering, by braking. Braking the left side, it turns to the left. Braking the right side, it turns to the right.</div><div>
</div><div>Like a tank, or excavator.</div>
Sorry! I must have been another place when typing my last post here. And i who asked you about exactly this too ^^:eek:

Like GT100 says, this is how i would have solved it.

mooman007uk 02-10-2013 09:55 PM

RE: Tracked FG Monster. About 900mm long!
 
any idea of the weight?

Taalasmaa 02-10-2013 10:07 PM

RE: Tracked FG Monster. About 900mm long!
 
I ordered a set with front and read cable brakes, for only 130€. I couldn't order them separately, but 130e is cheap for FG original set.

Taalasmaa 02-11-2013 04:57 AM

RE: Tracked FG Monster. About 900mm long!
 


ORIGINAL: mooman007uk

any idea of the weight?
Umm.. About 25-30kg's. The chains are about 12kg, and the sprockets do 1.5kg. Plus the rollbar.
<br type="_moz" />

Taalasmaa 02-12-2013 04:47 AM

RE: Tracked FG Monster. About 900mm long!
 
I got the brakes today. I will try mounting them later today.<div>
</div><div>http://i11.aijaa.com/b/00923/11766944.jpg</div>

Dirty_Vinylpusher 02-12-2013 01:58 PM

RE: Tracked FG Monster. About 900mm long!
 
Woohoo this is awesome!

2 thumbs up from Australia :D





Taalasmaa 02-14-2013 11:37 AM

RE: Tracked FG Monster. About 900mm long!
 
I deassembled the whole car, and Ill start all over again, due to the chassis plate was not straight. It had took a few hits, when I drove it as a car.<div>
</div><div>Luckily, I still have the original plate left.</div>


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