6x6 Kenworth Day Cab (King Hauler)
 

Now winter is here I decided to get back into the RC hobby again.
I wanted to build something that I could use at the scale crawling and scale trucking events so it had to be 6x6 and I wanted a decent turning radius so day cab was also the order of the day.

I started with a King Hauler kit, Globeliner chassis rails, Carson 20% gear reduction and some extra inner dually wheels.
https://scontent-lhr3-1.xx.fbcdn.net...18&oe=5E526779

I also got some front leaf springs and a HD rear crossmember from KK Trucks
https://scontent-lhr3-1.xx.fbcdn.net...7d&oe=5E4ADEBE

TLT-1 Front axle was sourced from eBay
https://scontent-lhr3-1.xx.fbcdn.net...e1&oe=5E547B47

Here you can see the King Hauler chassis rails vs the Globeliner ones
https://scontent-lhr3-1.xx.fbcdn.net...ed&oe=5E5818A4

The build begins, took me a little while to get my head back around Tamiya instructions... well it has been 15 years since I last built one.
https://scontent-lhr3-1.xx.fbcdn.net...cb&oe=5E5A0293

KK Trucks rear crossmember is a nice bit of kit but very fiddly to assemble with chubby fingers!
https://scontent-lhr3-1.xx.fbcdn.net...f2&oe=5E476F14

Chassis, axles and suspension all test fitted.
https://scontent-lhr3-1.xx.fbcdn.net...cc&oe=5E5783D4

Test fitting the transmission with a Lesu transfer box, just not enough room to make it all work unfortunately.
https://scontent-lhr3-1.xx.fbcdn.net...63&oe=5E501A74

The custom rear crossmember has allowed me to move the axles back 18mm to get the 5th wheel in a more realistic location.
https://scontent-lhr3-1.xx.fbcdn.net...94&oe=5E1A0FA4

Day cab conversion panel 3D printed and test fitted.
https://scontent-lhr3-1.xx.fbcdn.net...ce&oe=5E44E95D

Re: 6x6 Kenworth Day Cab (King Hauler)
 

The front springs didn't quite line up with the mounting holes so KK Trucks printed some new ones for me, they fit a treat!
https://scontent-lhr3-1.xx.fbcdn.net...2a&oe=5E52D901

I wasn't happy with any of the transfer boxes I could find so I decided to make my own with 2.6:1 reduction.
Here is the V1 Solidworks CAD mock up.
https://scontent-lhr3-1.xx.fbcdn.net...25&oe=5E583D59

1st prototype transfer box printed and test fitted. Gear mesh was too tight, too close to the cab floor and holes slightly out of line.
https://scontent-lhr3-1.xx.fbcdn.net...4a&oe=5E521B9C

Version 4 of the transfer box case... All bolts up snug now.
https://scontent-lhr3-1.xx.fbcdn.net...96&oe=5E6500E6

https://scontent-lhr3-1.xx.fbcdn.net...57&oe=5E5908D2

Transmission is on 20mm raised stand offs.
https://scontent-lhr3-1.xx.fbcdn.net...dc&oe=5E46FAF9

https://scontent-lhr3-1.xx.fbcdn.net...04&oe=5E64DB10

Just got to wait for the props to turn up now!
https://scontent-lhr3-1.xx.fbcdn.net...95&oe=5E5AB236

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Welcome back! The stripes newer leave a zebra...........A nice little project you have going, keep it going and let's hope we meet at some event.

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Thanks!
Hopefully this transfer box idea will work out so I can get it rolling!

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Little more done today!
Looking for somewhere to hide a 2S Shorty Lipo so I downloaded this toolbox from Thingiverse and rescaled it.
Had some 3D Printer issues but hopefully I the next version will come out better!
https://scontent-lhr3-1.xx.fbcdn.net...50&oe=5E4E797B

So the truck wasn't just driving around alone I bought a cheap Britains Big Farm Kane lowloader and promptly chopped the drawbar off to fit one from PiggyTaylor RC so the Kenworth can tow it!
https://scontent-lhr3-1.xx.fbcdn.net...b2&oe=5E433C99

Hitch close up.
https://scontent-lhr3-1.xx.fbcdn.net...06&oe=5E4F0B52

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Is the transfer case a reduction unit or direct output
If its 1:1 I'd install a slower motor now.

Re: 6x6 Kenworth Day Cab (King Hauler)
 

The Tamiya 3 Speed has the Carson 20% gear reduction plate and pinion on it and the transfer box is 2.6:1 reduction, should crawl well!

Re: 6x6 Kenworth Day Cab (King Hauler)
 

So the prop shafts arrived!
https://scontent.flhr4-1.fna.fbcdn.n...13&oe=5E5A710B

Had to trim the two bottom casing bolts off for clearance:
https://scontent.flhr4-1.fna.fbcdn.n...38&oe=5E470AF5

I won a Wedico Low Loader #3 off eBay and a friend gave me his old Heng Long Leopard as a load:
https://scontent.flhr4-1.fna.fbcdn.n...0b&oe=5E429E70

Fits a treat!
https://scontent.flhr4-2.fna.fbcdn.n...6b&oe=5E63B968

Remade the cab rear wall and made a rescaled Thingiverse chain locker to house a 2S Shorty Lipo. I printed some rear wings off ThingiVerse but they wouldn't fit with my Lesu tyres so I designed and printed my own which use the damper mount holes to mount to the rails.
https://scontent.flhr4-1.fna.fbcdn.n...18&oe=5E4EC96C

Nice and neat!
https://scontent.flhr4-1.fna.fbcdn.n...83&oe=5E5438DE

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Pretty good build right there. Happy haulin'
P.S. If you want better steering, move the parallel steering rod behind the axle, it will turn much better.

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Thanks for the tip, I assume you mean swapping the hubs on the steer axle so the track rod I'd behind the axle to make the ackermann angle correct?
What would be the best way to make the drag link from the steering servo work afterwards?

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Yes, that's correct, I put the servo laying down flat, inside the frame rails and use the same point you got now. If it's tight, there is a low profile servo on the market you could use also.

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Have you got any pics of your set up Bo? Would be handy for inspiration!

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Out of town until Friday. I will make some pictures when I'm back.

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Cheers that would be great!

Re: 6x6 Kenworth Day Cab (King Hauler)
 

I was looking into some older pictures and found these ones.

[IMG]https://live.staticflickr.com/4454/3...456c410c_b.jpgIMG_1871 by Bo Wallen, on Flickr[/IMG]

[IMG]https://live.staticflickr.com/4476/3...73a6a215_b.jpgIMG_1870 by Bo Wallen, on Flickr[/IMG]

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Cheers Bo, I was wondering more about the drag link from servo to hub?

Re: 6x6 Kenworth Day Cab (King Hauler)
 

That draglink can be mounted on top at either side of the hub. The parallel rod can be mounted under the springs with a lesser bend.

Re: 6x6 Kenworth Day Cab (King Hauler)
 

I see what you mean yea, Just wondering if the servo would have space to sit under the motor without the axle hitting it on full compression

Re: 6x6 Kenworth Day Cab (King Hauler)
 

Whilst I am waiting for some parts to come for the truck I turned my attention to the Wedico #3 Low Loader.
Being 1/16 scale its only 160mm wide and with the King hauler being 200mm wide I decided I needed some "greedy boards" for the trailer, which will also help support the Heng Long Leopard better!
https://scontent-lhr3-1.xx.fbcdn.net...c6&oe=5E5C01C2

The centre greedy board didnt quite fit nicely so will have to be reprinted at a later date (they were a 16hr print!)
https://scontent-lhr3-1.xx.fbcdn.net...8d&oe=5E5A9655

The tank still overhangs a little which is to be expected but it is now much more stable! (At the front it still sits on the bolts a little though)
https://scontent-lhr3-1.xx.fbcdn.net...43&oe=5E483721

Re: 6x6 Kenworth Day Cab (King Hauler)
 

The front axle does not move up very much, and if you put the servo up to the gearbox, I think it will work fine.