četrtek, 24. marec 2016

Finished Oshkosh 10x10 PLS

After over a year of tweaking the digital version and gathering all the needed the parts the time has come...

First a short list of functions:
6L motors for driving - 3x for left and 3x for right driveline
3M motors - 1x for the gearbox and 2x for autopumps
2 Independent dual gear transmissions - Each for one drive side
2 Steering Servo motors - 1x for front 4 wheels and 1x for rear 4 wheels
10x10x8 Wheel drive with portal hubs - All wheels are driven and the 1st , 2nd, 4th and 5th axles steer
3 steering modes - Normal opposite wheel steering , Front only wheel steering and Crab steering
Very long travel torque sensitive double wishbone portal independent suspension on all 10 wheels - Total suspension travel is over 5 studs on all wheels
Double segment working hook arm with a total of 8 pneumatic cylinders - Is able to hook up and load a 0,4 kg heavy pallete
Two newly designed autopumps to power the arm - Each powered by a single M motor
Two X24 piston engines - Each connected to its own driveline side
Detailed interrior with 3 seats and steering wheel - over 20 studs wide this is one my largest cabins ever built

I got the idea for the model while playing with new suspension systems. I managed to build a very compact and robust long travel independent suspension. This suspension also allowed me to build H driveline in which left and right wheel drive are seperated and in my case can be independently driven. This kind of setup has many advanatges, mainly removing the need for differentials when offroading, allowing small speed differences between sides when cornering and improved maneuverability due to independent drive (the truck can even skid, but its not recommended on grippy services).
After searching online a bit I decided to try to make a 10x10 model of a real truck, the Oshkosh 10x10 PLS:

 This was my original reference

Because I wanted this truck to have some speed I decided to use L motors instead of the usual XL motors. But because this machine is also meant for offroading I incorporated a double speed gearbox for each before mentioned drive side. Because I wanted to have more than just a rolling chassis I incorporated a functioning arm hook which can remotely hook up and load the massive palletes. I had lots of room to spare above the front wheels so I filled the space with two X 24 piston engines. For the final touches the cabin was detailed with three seats and opening doors, and the engine was finished up with a massive exhaust and cooling systems.

The finished model is over 85cm long and weighs 5 kilograms

Notice the 8 wheel steering. The front ladders/steps are flexible

Thanks to the high travel of the suspension there is plenty of ground clearance

 The under shot showing the two independet left and right wheel drives

 Another view of the rear steering and the loading arm

 Here you can see the two dual speed gearboxes. 
No broken gears, but switching gears under high load may damage the clutches
 Outdoor photo showing off the truck giving the Coyote a piggyback ride

Front view of the truck offroading

Here you can see how the suspension adjusts to the terrain

 Even when unloaded the suspension still does its job

I also put a lot of time and effort in the following video showing off the finished model in all its glory both indoor and getting dirty outdoor:

As usual with my models I am also relasing the digital version which is available in my LDD package
 The LDD file for the final version can be downloaded along with my LDD package

I would here bye also like to thank everyone who helped me realising this model with your support and donations. A BIG THANKS TO YOU:)