777 HAUL TRUCK (1/12 size)

[doodlebug]

Have you talked to a tire store, about urethane fill for your truck tires?
Cheers, Neil.

[RCP57]

I think he should put the tubes back in and run nitrogen... Don't want that tire pressure to change with all that heat build up while hauling!

[DADSGARAGE]

Originally Posted by RCP57

I think he should put the tubes back in and run nitrogen... Don't want that tire pressure to change with all that heat build up while hauling!

Right!! Forgot about that.....heat build up in haul truck tires is bad!!! I will have to consider that....hate to blow a tire knowing this thing has such a "blistering speed"...more likely heat build up from carrying a heavy empty @$$ truck...

[RCP57]

Originally Posted by DADSGARAGE

Right!! Forgot about that.....heat build up in haul truck tires is bad!!! I will have to consider that....hate to blow a tire knowing this thing has such a "blistering speed"...more likely heat build up from carrying a heavy empty @$$ truck...

Yeah you wouldn't want it to burn up like that haul truck at the Meadowbank gold mine!

[DADSGARAGE]

Originally Posted by RCP57

Yeah you wouldn't want it to burn up like that haul truck at the Meadowbank gold mine!

Nope....truck/tire fires are no fun....they burn for days....

[DADSGARAGE]

Originally Posted by doodlebug

Have you talked to a tire store, about urethane fill for your truck tires?
Cheers, Neil.

OK...so it's my turn to be "tired and stupid"...LOL...never heard of urethane filled tires..tell me more!!

[doodlebug]

Originally Posted by DADSGARAGE

OK...so it's my turn to be "tired and stupid"...LOL...never heard of urethane filled tires..tell me more!!

http://www.pathwaypolymers.com/www/docs/164/

http://blog.otrwheel.com/what-is-pol...-does-it-work/
Go talk to a tire dealer that handles forklift and industrial/construction tire's, and they can give you more detail's, I don't think you need more than an "8"
on the durometer scale, but inflate your tire's to the desired pressure, and tell the dealer to match it with the fill. Spray foam at home depot is NOT the same stuff.
Hope this help's
cheer's, Neil.

[Trucker_Jo]

We have an old lawn mower that we use for towing trailers around the property. We had a tire shop fill the tires with foam. We still haven't had any problems with the tires even with the chains and a load on. So i'm sure whatever they used will work for you!

[DADSGARAGE]

Thanks guys for the tire fill info......that would be a good solution......the only draw back might be the added weight,not like this thing is a feather weight now...lol....

[DADSGARAGE]

Didn't get much done in the last few days other than work on the fuel tanks....sorry no pics yet...oops...
So here is a recap of the truck and a list of suppliers

Truck size...
Length- 32"
Height - 16"
Box width - 17.5"
Weight- Hard on the back....lol

Steering servo (3.5 turn winch servo)
http://hitecrcd.com/products/servos/...-servo/product

Servo gear (12T -32P)
http://www.servocity.com/html/32p_hitec_metal_gear.html

Box hoist (9" - 35lbs linear actuator)
http://firgelliauto.com/product_info...products_id=13

Two speed controllers (one for drive,one for hoist)
http://www.robotmarketplace.com/products/0-SYREN25.html

#25 chain and sprockets
http://www.robotmarketplace.com/prod...s_main_25.html

Geared motor
http://www.robotshop.com/ca/en/baneb...motor-kit.html

http://www.robotmarketplace.com/products/0-PDX256.html

Tires and rims
http://www.princessauto.com/pal/en/S...mbly/8442410.p