dhc6twinotter

Cool. I'm sorry I'm not the best at explaining things.

The 5th receiver is set on the same channel as one of the other receivers, and receives the same signal from the remote control. In other words, the 4th and 5th receiver both have an XL motor plugged into the blue port and are set on channel number 1. Both XL motors run when I push the single blue lever on my remote control that is set to channel 1. The 5th receiver has nothing plugged into the red port.

I'm using 2 XL motors for the drive. Each motor is run off separate battery boxes and receivers. I basically have two separate circuits, and each motor can run at 100%. Two of the receivers are set on the same channel. As for the video, I'm just going to re-upload another one later today. Youtube is lame.

Thanks! Yeah, now that you mention it, it may be a bit thin. I'm not sure what to do about the video. It works fine here, but I got an email saying it may not work in a bunch of different contries. The music is copyrighted. Youtube does list the artist and a link to purchase the song on amazon, so I figured it would be ok. This is why I don't like adding music to my videos. Any ideas?

Thanks! I do plan on putting this in an airplane, but that will be a while from now. I have a few other mocs I'd like to build before I build a plane. We'll see though...I might change my mind. Thanks! It's not as big as your X24. I'll try to get a video up later today. My computer took a dump, so I'll have to see if I can borrow a different computer again.

Hey all, So, this is a project I've been working on for the past 10 months or so. This is a remote control backhoe based on the JCB 3CX. I know there are a few pictures of this floating around the forum, but I wanted to go ahead and post up a thread about it. There are 9 motors, and 12 functions (11 if you don't count the gearbox selector as a function). Functions: Drive | 2 XL motors Steer | 1 m motor Boom | 1 XL motor Gearbox Mode Switch | 1 m motor Dipperstick | 1 m motor* Dipper | 1 m motor* Dipperstick Extension | 1 m motor* Boom Slew | 1 m motor* Right Stabilizer | 1 m motor* Left Stabilizer | 1 m motor* Loader | 1 m motor* Loader Scoop | 1 m motor* Working steering wheel Fake I4 engine with moving pistons and fan *Functions operated through gearbox Specifications: 3 XL motors 6 m motors 2 battery boxes 5 IR receivers 3 extension wires 1 set LED lights 10 linear actuators 1 mini linear actuator 4 wheel drive with center differential 8 output gearbox Pendular front axle 8.4 pounds 25x140 studs (approximate) 5500 pieces (approximate) Pictures: LEGO didn't make a wheel large enough, so I had to piece together my own. For each of the rear wheels, I built an internal frame and each wheel has 32 smaller LEGO tires stretched around the frame. This took forever to do. If you've been to BrickFair or BrickCon, you may have seen this on display at those events. Since BrickFair, I've rebuilt the front axle, built the battery boxe enclosures, added a 2nd LA on the boom, and geared down the LA that operates the dipperstick. After BrickCon, I rebuilt the front axle again, removed one level of gear reduction on the boom LAs (it moves quicker now), and redesigned the boom gearing that operates the LA on the dipper scoop. All in all, I'm really happy with how it turned out. Some of the motors are straining a bit, and knowing what I know now, I think I'd do one or two things differently. In the future, I'd like to build a pneumatic version with a few more functions. That will be in a while, and I have a list of mocs I'd like to build prior to another backhoe. Anyways, just thought I'd show you all my project. More pictures on my Brickshelf And on my Flickr Thanks! Daniel

Correct. One switch selects between the crane rotation and stabilizers, and the other switch selects between boom and jib movements. Claw rotation and open/close is manual.

Thanks! That's interesting. I didn't know there were any real 16 cylinder radial engines around. But I guess that one makes sense since it is a 2 stroke engine instead of the more typical 4 stroke. I figured there was some obscure engine I was leaving out in my description. I actually haven't measured the size of this moc. The 35x35 dimensions I gave at BrickCon were just a guess for the sake of table space, and includes the width of the prop. It should be very close though. I'd like to put this engine in a Grumman Avenger, but I'd like to see if I can figure out how to make a more realistic 14 cylinder version. That might be more difficult than it's worth, and I may just stick with this design. Thanks!

X2 Sok, if you are building a non steered axle with duals, the best way is to go with a live axle.

Hey all, So, this is just a small project I've had built for a while, and I thought I would post up some pictures. This is a 16 cylinder radial engine with variable pitch propeller. The crank is built using the standard half offset crank pieces that is common on all Technic engines. Each piston is connected to a standard Technic connecting rod. Opposing connecting rods are linked by a thin 1x7 liftarm. There are a total of 8 thin liftarms, with 4 per row of cylinders. The liftarms kinda flop around, but it works very well with no binding. I ran the whole setup during the entire BrickCon event, and everything worked flawlessly (although the motor started to whine at the end). The variable pitch mechanism is built without the use of a swash plate. Everything is done through gearing. The propeller hub is built like a shaft within a shaft. The outer shaft spins the prop assembly, and the inner shaft changes the blade pitch. Under normal conditions, both shafts are driven by the motor and spin at the same speed. However, when the hand crank on the side is turned, the speed of the inner shaft changes and the result is a change in blade pitch. The differential is the key to the whole system and allows the speed of the inner shaft to vary. I'm pretty happy with how it turned out. The only problem I have is the number of cylinders. To my knowledge, there was never a 16 cylinder radial engine built. Because of the spark plug firing order, most, if not all, radial engines were built with an odd number of cylinders per row. Radial engines were built with 3, 5, 7, or 9 cylinders per row. Two row engines, like mine, would have been 6, 14, or 18 cylinders. Then there are the engines that have more than 2 rows, like the Wasp Major with 4, or the giant Russian Zvezda radials with 6 or more rows. I think that covers most radial engines, but I'm sure there are exceptions as well as more obscure engines out there. Anyways, I just thought I'd show a little project I've been working on. I hope to build a plane to go with the engine some time. Sorry about the dark pictures. It was overcast the day I took them. Thanks for looking!

Cool! I like that brake setup!

Very nice! I like the proportions. It must have been tricky to get all those various components from various sets to all fit together. Looks good!

Awesome! That log loader is much better than I anticipated! I was kinda wishing for a pneumatic set, but this is really nice! Nice to see another set with the miniLA. I like the red frame and new black panels. I've been waiting for these black panels! I think I'm going to skip most of the 1H sets (except for maybe the tow truck), and just buy this. It's really nice! Does anybody know if that new turn table has a hole in the middle? I hope it does! This part would be perfect for some mocs I have planned. Thanks for posting the pictures!

That is a good design, and I used a similar setup on my backhoe. It works well, and it is quite srong.

I like it! It looks really good, and the functions are very realistic. My city uses the Mack side loaders to collect the recycled trash. It is always interesting to watch how they work. Nicely done.

I have a hunch that the 2012 flagship model may be another backhoe. I could be completly wrong, but just a guess. I still want to see a SLS AMG. Anyways, I'm interested to see what this log loader looks like.

Looks great! I love those 23 window buses. They are worth an arm and a leg now. Some friends of mine have a mint 21 window bus. I'd like to own one someday.

It's looking good! I like the fact that it can pick itself up. Nice seat too!

Thanks! I'll post a video in a week or two after I make some changes.

Thanks! It was a great pleasure meeting David, Eric, Marius, and all the other great people at BrickCon. This was my first time in Seattle, and I hope to make it back. Had a blast. Since BrickFair, I added the battery box enclosures and rebuilt the front axle and the lower portion of the boom, but I still need to do some minor fixes before I'm completely happy with it. The front axle needs a bit more work, and I'm not completely happy with the linear actuator that controls the rear scoop. I'll make a more detailed thread with video once I'm satisfied enough with the moc. I should have one up in a couple weeks or so. Paul, those new 16t gears you gave me at BrickFair have held up great! Thanks! BTW, the 16 cylinder engine with variable pitch prop in those pictures was mine as well. :D

Cool, looking forward to the updates. It's looking good!

Awesome! I have a dumb question: How are you going to control 9 functions? Will you have some manual functions as well, or are you going to build some sort of gearbox?

I'll be there along with another guy from NC. I'll be bringing a Technic backhoe I've been working on, as well as another smaller moc. I've been to WA before, but not Seattle, so I'm really looking forward to it! It'll be good to meet you all! Daniel

I like it! Looking good!

That Morgan is fantastic! I love the working pushrods and rocker arms. Nicely done.