CrackerBox Test Chassis

[TRUCKMAKER]

I started this build at Indy. It's purpose is to test different RPM gear motors and motor/transmission combinations. Actually wasn't going to put a cab on it, figured it would never get out of the basement. That being said I have some styrene so I thought I'd give a Crackerbox cab a try, it's pretty straight forward with no weird curves, shouldn't be that bad to do. (Famous last words!)











Thanks for looking!
Kent.

[frizzen]

That's pretty cool than you can do that flat of a drivetrain.

Is the steering tierod too short, or is it just the picture angle?

[Mikem]

Hi Kent would you share what motor you have in your truck ? Thanks .

[TRUCKMAKER]

Originally Posted by frizzen

That's pretty cool than you can do that flat of a drivetrain.

Is the steering tierod too short, or is it just the picture angle?

Hi Frizzen, no it's not too short, it's just not adjusted yet, I also straightened the tie rod out and removed the front shocks. I found, after deciding to build a Crackerbox and got some critical dimensions online that I had to move the axle forward.

Originally Posted by Mikem

Hi Kent would you share what motor you have in your truck ? Thanks .

Hi Mikem, I get them from Servo City, the one in the chassis is 437 RPM. I have one in my dump truck connected to the screw drive, it's 313 RPM and a 165 RPM on the shelf, I ran it in my dump for a while but thought it was too slow, all kinds of power though. I have to give credit to Reg (RPC57) for the motors, I found them in one of his threads and he told me where to find them.

https://www.servocity.com/motors-act...ry-gear-motors

[egronvold]

Originally Posted by TRUCKMAKER

Hi Frizzen, no it's not too short, it's just not adjusted yet, I also straightened the tie rod out and removed the front shocks. I found, after deciding to build a Crackerbox and got some critical dimensions online that I had to move the axle forward.



Hi Mikem, I get them from Servo City, the one in the chassis is 437 RPM. I have one in my dump truck connected to the screw drive, it's 313 RPM and a 165 RPM on the shelf, I ran it in my dump for a while but thought it was too slow, all kinds of power though. I have to give credit to Reg (RPC57) for the motors, I found them in one of his threads and he told me where to find them.

https://www.servocity.com/motors-act...ry-gear-motors

By the looks and outout RPM, one might think that Servocuty and Servonaut use the same source.

[Mikem]

Hi Kent thanks for the info will order one today

[TRUCKMAKER]

Originally Posted by egronvold

By the looks and outout RPM, one might think that Servocuty and Servonaut use the same source.

I think you're right, there are some differences in specs but I'm not sure if that has to do with translation or not. Servo city is just easier for me to deal with and prices are a lot better.

Originally Posted by Mikem

Hi Kent thanks for the info will order one today

Great, hope you like them. So far I think they work well. It's kind of why I'm building this chassis, there are so many RPM choices it's hard to decide what works best.


Got the radio mounted on the cab floor. Now is all I need to is build a drive shaft so I can watch it move!

[up9018]

Very Nice, Always been a fan of a crackerbox.

[Tamiya Cowboy]

Awesome little truck you know Im a fan of the cracker box. I talked with Travis and he pointed me to this same tranny for my new one. I have not got it in yet but I like how you have your very nice work.

[Supermario]

Great looking build so far! That motor and tranny set up is so clean and simple, I'll never use a Tamiya 3 speed set up again!
Just imagine the power you could pack in that cracker box if you went with a lipo

Oh, and is the driveshaft built yet?

[TRUCKMAKER]

Originally Posted by up9018

Very Nice, Always been a fan of a crackerbox.

Thank you, me too!

Originally Posted by Tamiya Cowboy

Awesome little truck you know Im a fan of the cracker box. I talked with Travis and he pointed me to this same tranny for my new one. I have not got it in yet but I like how you have your very nice work.

Thanks Paul, since I don't have a mill readily available I decided to break the bank (a whole 4.99) and buy one of the mounts that Servocity sells for these motors and use it as a pattern for the crossmember I mounted it to.
As far as the Crackerbox goes I wish I would have known that. I would have stuck with my original plan and cut up a globe cab to put on and let you do the Box justice . This was just a kick around test chassis that originally wasn't going to see the light of day and wasn't even going to have a cab.......but I couldn't stop there.

Originally Posted by Supermario

Great looking build so far! That motor and tranny set up is so clean and simple, I'll never use a Tamiya 3 speed set up again!
Just imagine the power you could pack in that cracker box if you went with a lipo

Oh, and is the driveshaft built yet?

Yeah I just haven't pulled the trigger on lipos yet, if I had a Foxville to play in I'd probably be there by now but the cost and everything to support them just to play a couple times a year isn't worth it, that being said I was shopping and found a 12v NiMH, now if I could find a decent ESC that will handle it and the hobby fund can support I might think about it!

The drive shaft was started, finished and installed about 15 minutes after I posted that and I was tired and quit since I grabbed the wrong bit and over drilled the front cross by .10 mm. , for those who don't Know the shafts on these geared motors are 6mm. This is the first time I've been back in the shop.

When building my shafts I use the method that Tamiya Cowboy posted, Thanks Paul! It's a sticky in the Mechanical tech section. I use Traxxas parts and brass tube due to local parts availability, but the construction methods are the same.
If you have all the parts they go together quite fast. I think I have maybe 30-40 dollars total in ALL the shafts I have in 3 trucks that includes the 6x6.


Thanks Mario, good hearing from you.

http://www.rctruckandconstruction.co...read.php?t=708





Thanks guys!

[Supermario]

Driveshaft looks great and driveline angle looks perfect.

Ya, been quiet lately, life sure can change quickly. It's been weird to go from having an awsome backyard meet and one week later house is on the market and now all those things around the house that need fixing I been putting off are getting done to make it all nice for perspective buyers now. Paying for my procrastination right now.
so no time or desire to RC lately....

[TRUCKMAKER]

A couple update photos, long way to go yet!



Well maybe one photo. Photobuckects being a PIA and won't load my pictures. Has anyone found a reliable photo hosting program other than PB?

[frizzen]

Nice start on the cab! That's looking cool.

I've been hearing good things about imgur, but haven't tried them yet. Photobucket has become really unusable

[Trucker_Jo]

I store all of my stuff on google drive, if you have a Gmail etc. you have it. Works great!

[TRUCKMAKER]

Originally Posted by frizzen

Nice start on the cab! That's looking cool.

I've been hearing good things about imgur, but haven't tried them yet. Photobucket has become really unusable

Thanks Frizzen.

Originally Posted by Trucker_Jo

I store all of my stuff on google drive, if you have a Gmail etc. you have it. Works great!

Thanks Trucker Jo, I do have gmail and will check it out!

[FabOne]

LOOK'IN GOOD Kent!! Keep us updated.

-Terry

[Mustang46555]

Great start on the cab Kent!

[Tamiya Cowboy]

Great looking truck Kent..

[TRUCKMAKER]

Originally Posted by Mustang46555

Great start on the cab Kent!

Originally Posted by FabOne

LOOK'IN GOOD Kent!! Keep us updated.

-Terry

Originally Posted by Tamiya Cowboy

Great looking truck Kent..

Thanks guys, not much new. Spent yesterday on the Bridgeport at work redoing a part of the frame rails on the dump trailer in the photos and driving an hour to the LHS to find some clear sheet to make Windows for the Crackerbox. Missed a delivery from the post office that had some planetary gear motors to try in this chassis and screw drive components for another dump build coming later.

Kent