BrickBuildingFox

Thanks! Just discovered the 8888 Idea book. Didn't know there are even more accessories for 851. In the original 851 instructions there are 5 different ones and I planned to build all of them.

wow, amazing work with the leg mechanics and a very clever use of the clutch gear

Thanks for the advice, I am happy with the new look. Rear light is there and now I also put the exhaust stack back. There is even space for 6L engine and the hood can be opened now... maybe I will move the gray 15 and red 13 beams from the hood to the chassis. Previously I choose the gear as steering wheel, because it is a very iconic design element of the original... after comparison I agree it need to be replaced. I am happy with the design. For the next iteration I need to improve the statics of the chassis a little bit. Somehow, I can only focus on either design or statics when I build but not both And then, there are still 5 different accessories left to be designed.

I modeled the front and try out different lights... not sure which looks better. This one is closer to original 851: This use modern parts, and I use the same for the red light in the back... What's your opinion on the lights?

Cool, I am happy to see this model enter the contest. Really wanted to get it as a kid, but never did... It was on my list too, but I have neither pneumatic parts nor many blue parts in my collection, so I choose a different one.

New functions implemented: Got it I know, the distance of seat and steering wheel is too far... something I need to change... Next step will be to design the front hood and add a fake engine...

Yes, you are right, I already reduced it by 2 studs and looks much better now. Hm..., I didn't think of it but I like the idea! Also, I want the turning radius to be as small as possible.

for more details see here 851 on Bricklink Last weekend was a long one, and I got some precious time to build. Since the contest was already in the air, I used it to find a model and start a little bit... I hope that's not against the rules Unfortunately, I own neither the model nor the antique tires. Therefore I decided to use new (current) ones. They are slightly bigger, so that my model has to be a little bit larger. My personal goal for this build is to have a modern interpretation of the classic 851, rather than stay extremely close to the original (even if it costs a few points). Here are some impressions:

Wow, I like the idea to add the sawblade mechanism... to be honest, in the beginning, I couldn't believe that the wheel works properly... so I had to build it by myself and I am very impressed by the result.

Yes that's what I did and it was absolutely necessary for it to work. @pdwdo you have a topic with more details about your spirograph. I'm very interested in it. Thanks, this is a good Idea. Maybe I will change the design later. For now, I like the challenge to build a smooth sliding cross. Regarding this, I played around with small wheels to reduce the friction. I found the size of these wheels (https://www.bricklink.com/v2/catalog/catalogitem.page?P=42610c02#T=S&O={"iconly":0}) seems not good to use with liftarms. Currently, I am experimenting with the "round pin joiner" and it works quite smooth. Fortunately their diameter is slightly larger than the thickness of a liftarm.

Yeah, thanks for the advice, the current tan 20 tooth gears are really annoying... however, currently I don't want to buy more technic parts so I have to go with it. Splitting the gearbox in two, one part for each axis helped quite a lot. So I got a somewhat working prototype, as you can see in the video: https://bricksafe.com/files/BrickBuildingFox/moc008/20210305_215523_1.mp4 These are 8 of 10 possible figures: The 1:4 somehow messed up but the others are okayish. As you can see in the video the main problem is that the sliding mechans gets stuck sometimes... next I have to work on improving it.

Recently I got inspired by this Video for a new MOC: So after a few iterations I got some acceptable results For the above picture I used a 1:2 gearing ratio between the horizontal and vertical axes. The figure becomes more complex for different gearing ratios. More details on Lissajous figures can be found here: https://en.m.wikipedia.org/wiki/Lissajous_curve So as a next step, I started to design a gearbox, that has all the rational ratios up to 5:1 (i.e. 1:1, 1:2, 1:3, 1:4, 1:5, 2:3, 3:4, 2:5, 3:5, 4:5). This means I need a 10 speed gearbox. Note that for my purposes the reciprocal ratios like 4:3 and 3:4 will result in the same figure (only rotated by 90°). The bottom half creates the ratios (1:1, 1:3 and 1:5) the top part multiplies this by 1, 2, 3 or 4. This way I can create all the ratios I want. The major difficultiy to overcome is the FRICTION in the gearbox, as well as the "cross"-sliding pencil holder... Especially the torsion of the axis collect potential energy, that is suddenly released and creates ugly wiggles in the picture. My idea to reduce friction in the gearbox is to use the top and bottom half seperately for vertical and horizontal axis respectively... Do you have any other suggestions how I can reduce friction even further?

19: 10 20: 6 25: 4 24: 3 7: 2 2: 1 good luck to everyone!

Thanks for the consideration! However, I knew from the beginning, that I won't be allowed to vote. So it's fine with me if it won't be possible. I don't want to cause to much trouble/work ;-)

Thanks to the organizers of the contest, it was a pleasure to take part. I had a lot of fun building the motorcycle and learned a lot :) As a newbie on eurobricks, I guess, I am lucky that I don't have to decide how to distribute the points among all the great entries ;-) Good luck to all contestants!

Wow, such a sophisticated mechanism.

I am not really a fan of scooters... but when I saw the "fake" electric motor (with its yellow coils) rotating in the video I was very amazed. It's a well executed creative Idea!

You really know how to keep up the tension... have been looking forward to your entry/video for a while now. Well done!

Wow, I am a big fan of those trans-clear cylinders... brings the 4845 Formular 1 car to my mind, which was the first "large" technic set I got. They fit very well with the lime color

FOXBIKE

I improved the front suspension which is very robust now. So with this I think the model is finished :) I am quite happy with the outcome and already created the digital model for the instructions.

New video of the Kickstart mechanism: https://bricksafe.com/files/BrickBuildingFox/tc19/20210117_210910_1.mp4 and I added the fake 2-cycle engine: The drivetrain: Next step is to prepare the digital model (and probably instructions) and make some small design changes here and there. Thanks :)

Put the gerbox inside the Cassis, clutch works very well as you can see from this video: https://bricksafe.com/files/BrickBuildingFox/tc19/20210114_203336_1.mp4 Next step: add fake engine

Thank you!

Yeah, it's a lot of work... I totally feel the same ;-) hang in there! I like the unconventional steering.