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8x8 RC ARFF
RC, pumps water, steers,
About this creation
When The Lego Company put out their 8 x 8 airport fire truck, set 8454, I thought I could build it much better. I decided to use the tires from the big Lego Technic Jeep set and it would be easy. After a lot of frustration trying to build the drives and a few questions to Eric Sophie on how to build the drives, I think they work ok. The truck is FULLY Lego Radio Controlled using four of the black RC electric motors, one for each set of wheels. There is no differential so this makes it very hard to steer. The wheels are geared through a worm gear so the truck can not roll without power. The steering is driven by one geared electric motor. The wheels are connected to walking beam, which allows then to have a great deal of forward and side-to-side movement. Since the truck is now about 22lbs, with the radio it, the suspension has been changed from the independent suspension used on the real truck.
The truck was also to carry its own water tank but due to the weight increase, an external tank is used. A GMC windshield washer tank and electric washer pump are used to pump the water through the truck and out the two nozzles. The hose coming from the pump is split through a valve so two water lines enter the side of the truck connecting to a brass fitting. The hose lines can be both operating or one can be turned off at a time. The hose lines are run through the truck, one to the front of the cab to a movable nozzle and the other run up to the boom end nozzle.
The Snozzle Boom is motorized so it can turn left or right. The boom works off two sets of pneumatic rams. Since the boom is so heavy, the boom was also modified to work a little differently from the original truck. CLICK the “UP” button to see more pictures of the boom working in the pictures of the 6x6. All of the pneumatic switches are mounted as parts of the details. The motor for both the boom and the compressor run off two knobs on the side of the truck. The hose connection is hidden under the two gray caps with the chain on them.


Real truck: You can see this truck at http://www.e-one.com/arff.asp .

Dimensions:
Length: 98 cm
Width: 26 cm
Height: 36cm
Weight: 22 lbs

Any comments are welcome.
Thanks for reading
Jacub

jacubmaur@gmail.com



Comments

 I like it 
  October 23, 2010
Wow! I wish MocPages had a "Like" button.
 I like it 
  January 7, 2010
i want more photos on that photo u cant see anything
 I like it 
  February 19, 2009
really really good work! I bet you needed a lot of time for this!
 I like it 
  April 19, 2007
This is amazing. I really like the way it is all remote control and i like the shear size of it. The working water pumps are also pretty cool. Superb job.
 I like it 
  November 28, 2006
I really like this, very well done, lots of attention to detail
 I like it 
  January 14, 2005
VERY nice. What range is this cannon? Could you use a gearbox or is it too heavy for that?
 
By Jacub Maur
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The background images used on this page are © Todd Lehman,
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LEGO models my own creation MOCpages toys shop 8x8 RC ARFFLarge scale vehicles


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