777 HAUL TRUCK (1/12 size)

[doodlebug]

What about some of those short chrome valve stems?
Cheers, Neil.

[modelman]

DADSGARAGE-you are doing some great work on this build. I have enjoyed watching your progress. A bit more on the akerman steering (if you care) I think for proper akerman geometry with both front wheels pointed straight forward, the steering arms should be aligned with the center of the rear axle. Here is a neat diagram that shows how it works.
http://quaxio.com/steering/. Keep up the good work!!!

[DADSGARAGE]

Originally Posted by modelman

DADSGARAGE-you are doing some great work on this build. I have enjoyed watching your progress. A bit more on the akerman steering (if you care) I think for proper akerman geometry with both front wheels pointed straight forward, the steering arms should be aligned with the center of the rear axle. Here is a neat diagram that shows how it works.
http://quaxio.com/steering/. Keep up the good work!!!

Thanks for the info, getting the steering geomerty right is a tricky thing and challenging...mine will not be exactly right but it will be close"ish".. I found this picture of a truck standing on it's tail...interesting veiw of the steering


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[Espeefan]

Originally Posted by DADSGARAGE

Thanks for the info, getting the steering geomerty right is a tricky thing and challenging...mine will not be exactly right but it will be close"ish".. I found this picture of a truck standing on it's tail...interesting veiw of the steering


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That is a very interesting photo! In all honesty, your steering set-up looks like a very good facsimile of the 1:1 trucks! Makes me wonder if they have the proper ackerman effect or not? It could be that the 1:1 truck's links to the knuckles are longer, reducing the parallelism problems encountered in small scale, and the travel arc of the center arm may be less, if it's pivot point is further back from the bolts that secure the steering links?

[JAMMER]

I was wondering if you took the two tie rods at the center pivot point and swapped them so that they would be close to the center pivot point if that would work better. Ed

[doodlebug]

Originally Posted by JAMMER

I was wondering if you took the two tie rods at the center pivot point and swapped them so that they would be close to the center pivot point if that would work better. Ed

That's what Cat called "sprunion" steering on there forklifts,
If I remember correctly?
Cheers, Neil.

[dirtpusher9]

Love the work you've done on the truck and the dozer, very impressive. I with Reg, good enough on the steering, lets see it haul a load.

[DADSGARAGE]

I have to agree with you both (RCP57,dirtpusher9)....enough on the steering already....this is a topic that could go on and on...I don't want to get into a debate on something that is right or wrong, debates only end up with someone getting offended at one point.....so at this point we will say my steering geometry isn't the best ( and no I'm not offended by any comments or suggestions...takes more than that to hurt my "feeling"...LOL) my only concern with the steering idea was if it would be strong enough to turn with/without a load on the truck...the other concern is the fact it has no diff. which could be the biggest problem when steering the truck no matter how good the steering geometry is or isn't. I do appreciate all the suggestions and ideas!!! Thanks guys for all the input!!! Building stuff from scratch is a challenge and any help from others is great and always welcome!!!

[RCP57]

Originally Posted by DADSGARAGE

I have to agree with you both (RCP57,dirtpusher9)....enough on the steering already....this is a topic that could go on and on...I don't want to get into a debate on something that is right or wrong, debates only end up with someone getting offended at one point.....so at this point we will say my steering geometry isn't the best ( and no I'm not offended by any comments or suggestions...takes more than that to hurt my "feeling"...LOL) my only concern with the steering idea was if it would be strong enough to turn with/without a load on the truck...the other concern is the fact it has no diff. which could be the biggest problem when steering the truck no matter how good the steering geometry is or isn't. I do appreciate all the suggestions and ideas!!! Thanks guys for all the input!!! Building stuff from scratch is a challenge and any help from others is great and always welcome!!!

Well said...now did you weld it together and paint it this afternoon or what?

[DADSGARAGE]

Originally Posted by RCP57

Well said...now did you weld it together and paint it this afternoon or what?

Ummm...no...........but I will add some pics....

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[ihbuilder]

awesome job on the ladders and the whole truck , I've been watchin it on the tube before you posted here . H2O jet ? if so it's giving me some new ideas in the future .

[apfubar]

Very nice!

[DADSGARAGE]

Originally Posted by apfubar

Very nice!

Thanks...slowly getting this built....

[JAMMER]

The Tipple 7 is coming along nicely. When I do one it will be made out of aluminum easier to machine and lot lighter. I got the wheels for it and that is as far as I got. I could have it water jetted I have a place that does it for me at a very reasonable price. Right now though I have 3 other projects that are taking up my time. Keep up the great work it. Ed

[Trucker_Jo]

Wow this thing look awesome! (And heavy) The jet seems capable of making some amazing parts for you so far. Looking forward to updates

[DADSGARAGE]

Here is short vid of the truck...it is a bit slow but it will have to work for now....

MERRY CHRISTMAS EVERYONE !!!!!


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[RCP57]

Wooo-hooo! Looks good and just in time to haul presents to the Xmas tree! I sure like the size of that. I don't think the speed is too bad? I guess you could always up you voltage or change the front sprocket if you thought it wasn't fast enough.



Kerry Christmas KP!

[JAMMER]

Wo it's alive. It seems to turn all right, great job. With the 5 gallon pail you start to get the size of it. Ed

[RCP57]

....I meant Merry Christmas not Kerry Christmas...

[modelman]

DADSGARAGE-truck looks great. Turning radius is good, speed may be a bit slow but can be easily fixed. Have you calculated what the scale speed should be (ft. per sec.)? Keep the pictures coming.