Milan

If you can, it would be interesting to see how they will behave when powered by both hand pump (unmodified, of course) and compressor with small pump (M motor -> pulley wheel -> 6L pump) . I think those are systems that most people use. Regarding power, I used brand new components just for the sake of the test. I guess your 64mm is used. So probably has some imperfections in sealing, thus its outcome would be lower than it should. For 48mm, if they are in used condition, i guess the situation would be the same.

I am.

For a project I need a lots of pneumatic cylinders, and I need to know fairly precise how much they can lift/push. So i tested them with compressor and hand pump. All pneumatic components are brand new, never used. Results: Small Cylinder: Powered by compressor: 435 grams. Powered by large hand pump: 570 grams http://youtu.be/0ldaX5JWmEM Large Cylinder: Powered by compressor: 1810 grams. Powered by large hand pump: 2450 grams http://youtu.be/ByeBRVU_OKE

Great looking G!

I used this type of offset driveshaft. There are real vehicles that used this system, too.

So, will you Jim create a topic collecting all the JFMAIR creations? And perhaps announce new competition/build-off?

It will add a lot of weight onto the model (100+ grams) which will affect the performance.

You should put some between nail and technic bricks. Some hard wood perhaps. That bricks that had contact with nail must be damaged.

I wouldn't do it.

Why don't you take it to some electrician? If it is wire problem, he can repair it.

Their usability has greatly improved now! What is the length of the rigid hose in the tracks?

I am curios to see how it will perform. What motors are you using?

You need to count how tight you want it to be. if you use axle, the boom will have more lateral "play", with pins it will be tighter, and therefore less play. If the boom is not very heavy (probably not if only 5 studs wide) I would go with the pins. If the boom is very heavy, there are still options, like mounting turntables instead of axles or pins.

If you did not design model with priority for PF, it is better off without it. Drivetrain, maybe even steering setup may not handle it right. And it would be really shame to ruin the perfect lines and overall look of the car with motors, receivers, batteries...:)

I guess, judging by the space between track links, that only big yellow 21T gear could operate them, and probably medium Blue and small Red one (old type, they are not producing any more)

Sorry, I meant: The tracks itself - can they be driven with some other gears (24T, 16T) instead of the 21T yellow gear you used in MOC?

With what gears those tracks can be driven? Only with those big yellow, blue and red ones?

I can't believe it...I am building exactly the same machine :) But in a little smaller scale (maybe 10% smaller) Mine will be only bricks, it would be great to have them side by side! Awesome work! tracks are great.Arm looks good, too! Can you post a picture of arm and small LA mountings?

Thanks all! Moving on to the construction equipment and rc buggys!

Thats helmet, he asks about the cape. Vader's cape is about 25cm tall, and, when unfold, about 30cm wide at widest point. Please note this dimensions are rough. Cape is attached on towballs, two off them, and have another hole for head's axle. Hope this helps :)

Yellow rims.

Chains are actually not a issue, I tested the halftruck by pushing the chair (which I have done numerous time with ZiS 5), and it did push it, but chair had good grip few cm later and central diff's gear cracked. Chains were good. They never snapped, which is surprise for me! Also they endure on the outside play in dirt, while small gear cracked again. I left chains to be a tiny bit longer than they need to, to be more elastic, maybe that helps. dhc6twinotter: this truck is a rare exception. Chains are never good with tracks. But I guess designers in 1938 did not have much time to make other solution. BIg boss was inpatient for his new winter vehicle :)

Whats up with wheels?

Production of the ZiS-22 lasted from 1938 until 1940 resulting in only 200 samples built of which a small number was used during the Russo-Finish conflict of 1939/40. (photo from 05m6.de, used with permission) LEGO Model: Made on ZiS 5 chassis, all the vital components are the same. Steering and suspension is the same on front axle. Drive is different, it has faster output from XL motor, because tracks have internal reduction. For detailed description of the chassis, suspension, cabin and cargo bed and its components, please see my ZiS 5 model Back axle: Back axle has differential, and reinforces all around. Turntables are used as a connection points to the trucks for three reasons: 1. To release drive axles of any pressure from weight of the truck 2. To have strong 4-point connection of axle and single caterpillar track 3. To allow caterpillar tracks to have infinite rotation (needed for rolling over obstacles) This axle is extremely strong with turntables, weak point is differential, which can break the central 12 bevel gear under heavy pressure. It took me few days for axle to make, test and implement into the chassis. It can be removed and changed with regular axle for wheels in about 30 seconds. Caterpillar tracks: Tracks are made to be as real as possible. In order to achieve perfect realistic look, they have many parts, and single track weights 370 gr.! These red covers are, like on real one, protection of chain drive system. Yes, real halftrack has indeed chain drive, which sometimes broke and caused great problems. Final setup weight about a kilogram: Cargo bed: For this version I wanted to make canvas bars, so I did it with axle and connectors and a lots of axle joiners. The rest of the cargo bed is the same, with small modifications to be able to connect with canvas bars. Variations: From variations, I choose to make cargo bed version, and tractor version. Playability: Model was tested outdoors and it performed ok, without breaking gears. The truck weights nearly 3.5 kg, For best results, it should be kept and used indoors, on flat surface or on carpet. Then it can easily climb over sleepers, carpets or small obstacles. Instructions: If there is enough interest, step by step paid instructions will be completed I am still giving away free .ldr files as a rough sketch. Video: (2.5 mins) http://youtu.be/s6_helFqsNQ Photos: Rest of the photos are on my website: www.ultimate-design.org

Welcome to EB!