Re: 777 HAUL TRUCK (1/12 size)
 

KP, what planetary ratio and motor did you go with for the 777? I'm just curious what you think the truck will gross out at, weight-wise, and about how much power it would take to move the load. How many volts are you running the motor at?

Re: 777 HAUL TRUCK (1/12 size)
 

I just read through a couple pages of this build to get myself caught back up, and the truck looks amazing. You are a true craftsman.

As far as your question regarding the appearance of the walkway, I think it looks fantastic, but what may be throwing it off to you is the open spaces in the walking surface. In the pictures it looks like the walking surface is expanded metal or diamond plate where you have solid metal with slots. Those slots in scale look a little big, probably a couple scale inches wide. If you attached some scale expanded metal or diamond plate on top I bet the scale appearance would change.

Again, I think it looks great and very scale, just trying to take a stab at what was bothering you when looking at it in person.

Re: 777 HAUL TRUCK (1/12 size)
 

The motor /gear box is a Banebots 256:1 P60 gear box RS540 motor. 12volts

The weight of the truck will be about 85-90lbs.....

You maybe right about the slots...they are a bit big....scale would make them at about 1.5".....wish I had a picture of the walkway from above to see what it actually looks like...thanks for your input....glad you like the build!!

Re: 777 HAUL TRUCK (1/12 size)
 

"The weight of the truck will be about 85-90lbs.....":jump::bounce:

Nice!

Re: 777 HAUL TRUCK (1/12 size)
 

Hope it will carry more than it weighs....:D

Re: 777 HAUL TRUCK (1/12 size)
 

:jaw:

Re: 777 HAUL TRUCK (1/12 size)
 

nice work, a work of art. I may need to get you to come help me dig out from all the snow we have here when you get it finished. We have over two feet already this is to much for this early in the winter.

Re: 777 HAUL TRUCK (1/12 size)
 

Truck is killer! Lemme know when you decide to cut another set of sheets so I can tig one up! :D

Re: 777 HAUL TRUCK (1/12 size)
 

Happy New Year !!! :bounce:

Re: 777 HAUL TRUCK (1/12 size)
 

Happy new year to you as well KP!

Re: 777 HAUL TRUCK (1/12 size)
 

Cut some panels for the box ealier today....not sure if I want them (1/2") above the frame like in the pics or even with the top of the box frame....What do you guys think???
The holes in the panels will be plug welded and then sanded flat...to avoid seeing any welds....the box floor on this model is flat unlike the real deal...kinda wish I had made it more like the real deal...would look much better...the flat floor was the easy way out...LOL..:D;)

[IMG]http://i1291.photobucket.com/albums/...ps17d11999.jpg[/IMG]

[IMG]http://i1291.photobucket.com/albums/...psea6056cd.jpg[/IMG]

Re: 777 HAUL TRUCK (1/12 size)
 

I take it you are suprised at the weight....LOL...told you it was heavy!!!!

( when it is finished I will get the actual weight...I'm only guessing on the weight being 85-90lbs...but my back tells me I'm close!!! :) )

The weight on the 1:1 777D is 142,573 lbs so if I did the math right the 1/12 model should be 82.5 lbs ??? So it may end up being a bit heavier than it should be in terms of scale....good thing this is a 1/12"ish" size and not 1/12 scale...LOL....

Re: 777 HAUL TRUCK (1/12 size)
 

This model is massiVEE. And awesome:D I like the 1/2 inch kept above the frame part on the dump box I think it looks better than if it were to be cut flush. How many shovel-fulls of dirt you reckon this thing willl haul when you get there?

Re: 777 HAUL TRUCK (1/12 size)
 

Thanks....this thing is a fairly big...and really heavy...LOL...not sure how much this will carry,but he taller side walls will help a little...;)

Re: 777 HAUL TRUCK (1/12 size)
 

Really excellent forming and fab methods - I have learned a good bit from your posts - thank you. The guard rail and ladder methods are the best!

Thanks for those links to Waterjet companies and the Plasma cutter info - hopefully someday I can afford a table myself.

Once again - thanks for sharing your project - it's awesome!

Re: 777 HAUL TRUCK (1/12 size)
 

Thanks.....not sure if it is "art" but it is turning out to be a lot of work!!
( You just need to build a bigger dozer for all the snow...:eek::D )

Thanks.....didn't think there would be much interest in a 1/12 model on here maybe I was wrong....need to get this one done first....who knows someday I might cosider cutting some for others....(Tig is the way to go !!!)

Re: 777 HAUL TRUCK (1/12 size)
 

Thanks!!!.....glad to see my simple build and ideas are helpful...that's what this is all about, sharing and learning from others. There are builders that are much more skilled and way way more talented than me on here....as long as we share, we all get to learn....and there is SO MUCH we all can learn from each other !!! Thanks Again....

Re: 777 HAUL TRUCK (1/12 size)
 

Started playing around with the fuel tank.....actually this will have two fuel tanks....it should have one fuel tank and one hyd. tank but I'm going to make both sides the same....besides you can only see one side at a time and most people won't see the error so hey works for me.....Ok so I'm cutting corners, again!!;):D ( I just want to get this done...work out the details later..maybe;) )

The tank looks a bit too long....need to shorten it just a little....try and try again!!!!:o

[IMG]http://i1291.photobucket.com/albums/...ps1c496588.jpg[/IMG]

Re: 777 HAUL TRUCK (1/12 size)
 

Looks good to me. I think you need to air up those rear tires again! That foam you have in there is unhappy...

Re: 777 HAUL TRUCK (1/12 size)
 

YUP!!! No doubt!! Foam just isn't going to cut it!!! (Looks tired already and it hasn't done any work yet!!:))

Re: 777 HAUL TRUCK (1/12 size)
 

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

Re: 777 HAUL TRUCK (1/12 size)
 

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!

Re: 777 HAUL TRUCK (1/12 size)
 

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

Re: 777 HAUL TRUCK (1/12 size)
 

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...:p

Re: 777 HAUL TRUCK (1/12 size)
 

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

Re: 777 HAUL TRUCK (1/12 size)
 

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

Re: 777 HAUL TRUCK (1/12 size)
 

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 :eek::eek::eek:
cheer's, Neil.

Re: 777 HAUL TRUCK (1/12 size)
 

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!

Re: 777 HAUL TRUCK (1/12 size)
 

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....

Re: 777 HAUL TRUCK (1/12 size)
 

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

Re: 777 HAUL TRUCK (1/12 size)
 

I am surprised how heavy it is, or will be, but then again it is a big model! Seeing it sitting on your lift table really helps put it into perspective for me, since we have many of the same sized lift table all around work.

At least you might be the first to say even the weight was accurately scaled down! :)

Re: 777 HAUL TRUCK (1/12 size)
 

This truck is turning out to be much heavier than I thought....yikes...cutting it from solid material is a big reason for the added weight, at least something might be close to scale.....lol

Re: 777 HAUL TRUCK (1/12 size)
 

From my experience with racing go karts where the tires have to reach an optimum operating tempature of 165* F, when I ran tires with air or nitrogen they both reacted the same as far as how much air pressure was increased and it also took the same amount of laps to build the same heat and air pressure!!! With all that being said, I would look into foam filling the tires to achieve what you want!!! Also my wife's new nissan cube dropped air pressure from the recommended pressure of 44 psi to an average of 20 psi when the cold weather set in, and they are nitrogen filled also!!! Hope this helps!!!

Re: 777 HAUL TRUCK (1/12 size)
 

Made a new cab today (cut from 14ga)....needed to make some changes...so I added holes to attach the windows and the grab bar at the same time. Decided to use fasteners to attach the windows....the upper portion of the cab will be painted black so the fasteners shouldn't stick out to bad....;)


[IMG]http://i1291.photobucket.com/albums/...psf4bd2b70.jpg[/IMG]

[IMG]http://i1291.photobucket.com/albums/...ps5f6263a3.jpg[/IMG]

[IMG]http://i1291.photobucket.com/albums/...ps29ce8393.jpg[/IMG]

[IMG]http://i1291.photobucket.com/albums/...ps5846d15c.jpg[/IMG]

[IMG]http://i1291.photobucket.com/albums/...ps2b69e655.jpg[/IMG]

Re: 777 HAUL TRUCK (1/12 size)
 

Nice! So jealous!

Maybe you should get some button head screws???? Not picking, just a suggestion.

Re: 777 HAUL TRUCK (1/12 size)
 

Thanks.....button heads would most likely look better....don't have any that small...yet...lol

Re: 777 HAUL TRUCK (1/12 size)
 

Metal origami, That's a neat way to build!

Cheer's, Neil.

Re: 777 HAUL TRUCK (1/12 size)
 

To me it looks like you have got the correct speed, to often models are runned to fast:cop:!

Very nice model you are making, interesting way of solving the ribs on body!
A tripple 7 have always been a favorite for future modeling project, did find a 2nd hand model in 1/87 from CCM yesterday, can be useful for reference.
http://i1014.photobucket.com/albums/...ps6be78877.jpg
http://i1014.photobucket.com/albums/...ps97acce1f.jpg

/Dan

Re: 777 HAUL TRUCK (1/12 size)
 

Metal origami...lol...never thought of it like that before...but your right, thats kinda what it is :D

Re: 777 HAUL TRUCK (1/12 size)
 

Thanks Dan glad you like it.......having a die cast model would be very helpful..having some actual drawings to work from would be even better!! :)