MAN 7to mil GL

[efferman]

Hi Folks, my name is Michael and i want show you my newest project. i hope you can understand my English.

This MAN 7to mil gl will be 16 studs Wide and overall 45cm long . Front and rear axles are fully pendular. I use 62.4x20s Tires and a gear ratio of 1 to 12.

Actually i have a rolling chassis and i want show you some pictures

More pics will be found at Brickshelf.com when the Album is online. Ask me If you want more infos

more will come in the next days

ciao

edit:

a few minutes ago i make a little testrun on a 100 % ascending slope and i have two problems.

The first is a clicking noise and no propulsion on the Frontaxle. i guess i must redesign the Gears.

The second problem is the following: if the driving needs high torque, the second Axle is lifted in the air by the third Axle. Maybe Springs could solve the problem.

Edited May 4, 2010 by efferman

[DLuders]

Nice MOC! If the gears are slipping and you need more torque, have you used Nico71's Truck Trial (TT) Tools v2.0? If not, check it out at http://www.bricktrucktrial.com/article.php3?id_article=168 .

On your Brickshelf folder, is this the correct photograph that shows the slipping gears?

Edited May 6, 2010 by dluders

[efferman]

thanks, the torque is enough. the problem is a Jumping gear on the front axle

The 16 tooth jumps over the 12 tooth when is need high torque in the forward direction. In the reverse direction the gears are going together.

Edited May 5, 2010 by efferman

[Jurgen Krooshoop]

Yes, it look like these gear aren't secured, which causes the 16t to slide down and start rattling. Make sure all the gear-transitions are secured on both sides when high torque is needed.

[efferman]

yes, but i think i have the solve for the problem. here is the concept

now i must only find out how i could connect it with the rest of the transmission

[dhc6twinotter]

Interesting drive method you've used on the front axle. When I'm building 4x4 or AWD models, that's always the tricky part for me.

Looks good!

[efferman]

Thanks, in this model i have a smaller version of it.

[efferman]

hi Folks, the Gear problems are solved. i have a little offraod video for you

[Milan]

Nice video.

It looks like it goes good now.

[efferman]

thanks

now i am satisfied about the offroad performance. maybe the 62.4x20 S tires are a big part of the performance. the grip niveau is much higher than the grip of the bigger Tires. i would be very glad, if the lego group would be release 94.8x 32 tires with the same profile and wheels with a asymetric design like this, to have more space in the Wheels. But i think this time will not come

Edited May 8, 2010 by efferman

[Milan]

Yes, that would be nice, also it would be great if there are tires size of the 24x43 but with 62.4 pattern, at least for me.

[efferman]

yes that size would be nice too

back to the truck

The test chassis had make the place free for the final Chassis. The XL and the M motor has found their final place.

next step is the platform

edit:

i think it is nearly ready. The platform is finished and the Battery Box plays the payload and the most unusual holes in the driver cab are closed. i hope it is not to heavy to climb over obstacles.

More Pics you can find at the brickshelf folder when it is online

edit²:

The final Weight is 1382grams and it is a little bit too heavy for a 1 to 12 transmission. a 12 tooth bevel gear was killed directly behind the xl.

Edited May 9, 2010 by efferman

[efferman]

i have a new video with some Rock Crawling and outtakes

i am really satisfied about the offroad performance. Sometimes a gear is jumping over, but this is no big problem

[Sam42]

Hey efferman, nice moc, once again! I love the rear suspension.

Are there any developments on the "gear crusher" unimog project? Are we gonna see a thread on that any time soon?

[dhc6twinotter]

I like it! The rear suspension looks like it has a good amount of flex.

[efferman]

thanks, and no, the unimog project is cancelled. after disasembling i have found on each wheel a 8 tooth gear how was nearly broken. maybe i make later a new try.

and my Scania is a longtime project . the plan is a 4 Axle tractor unit with a Crane like this cute thing

picture source

or maybe like this

Edited June 1, 2010 by efferman

[Sam42]

Ah, that's a shame, the unimog was a great moc and very prototypical,

That 2nd pic of the scania t with what i presume is a logging crane is a great hint at the direction the scania project is heading....

pneumatics or L.A.s for the crane?

[efferman]

for the unimog i must first invent a stable steering system with a high reduction between steering point and wheel. and which is not longer than the actuator part on this axle

The Crane on the second Picture is a Deco 62 3S 2S (62mt, 3 telescopic sections on first boom and 2 telescopic sections on second Boom) from Effer. It is a crane for roofers which is built at my apprenticeship training position in the early 1990s. .

LA or pneumatics ? sorry i dont know. Linear actuators are longer, has no power but i have 11 of these. Pneumatics have power, but i have only two of them. we will see

[Sam42]

Ahhh.... i questioned my first guess of timber crane after i spotted the boom extensions...

Steering always presents more of a challenge than drive in my opinion, especially with the constraints in the case of that axle... I was wondering about what your solution could be.

[efferman]

one of the possibilitys is on this Picture, but this version is not perfect for RC

an other posibility is a second wormgear on the rear axle. but by reason of the driveshaft it not could be exactly the same.

i prefer the second one. the first one is to inaccurate at steering maneuvers.

[efferman]

back to topic. My MAN have now a logging Trailer at its end. The trailer have two parts and the part at the end have a self steering Axle

Edited June 6, 2010 by efferman

[efferman]

hi guys, at yesterday evening i had a idea and currently iam not completely sure what i should do with it. to solve this problem i have a question to you.

i have put the rubber of the 94.8 tires on the rims of the 8448 design car. now they are 100mm in diameter and only 4.5 studs wide.

the diameter and width of the tire fits nearly perfect to a classic willys jeep. now my question:

i think my 14 studs wide willys needs a big brother, but is something getting wrong if a willys jeep have portal axles?

Edited January 15, 2011 by efferman

[DLuders]

@ efferman: I like the idea of combining the 32197 "Wheel 81.6 x 34 ZR Three Spoke Swirl" (from the 8448 Super Street Sensation set) with the 54120 "Tire 94.8 x 44 R Balloon"! It just goes to show you that the Bricklink Tire on Wheel Relationships webpage does not show all possible combinations for their "Match #285".

+ =

There are several Willys Jeeps driving around in here in the Pacific Northwest of the USA. Although it may not be common to see them "jacked up" with portal axles, I'm sure it has been done. Go for it!

[efferman]

hm, the pick up i had not in my mind but it is surely an option. the one that i had thinked about is this

Picture source

i could understand, that the comparisation page is not listing this posibility. it fits very thight and only crazy people like me, could think this would fit.

[Milan]

It looks good and it offers greater diameter (something we all want) and it is thiner, which is good for specific Jeep.

Good luck with it! I would like to see it!