JoKo

Now I have a basic cockpit and canopy.

I choose the dark side with my build. This spaceship is dedicated to cyber-criminality on low and high earth orbit and the main feature is a big parabolic antenna. I will use the 42112 concrete mixer as main propellant tank. It already has the main aerospike engine attached. The mechanic guy is working on side engines

Yes I had to carve one out of a 12-tooth black bevel gear for the single cylinder above. the next step for me would be having small lego compatible springs to create more complex valvetrains.

Maybe someone saw it coming... after the flathead and the v8. The Ford V8 Flathead! Just like the real one it has a single camshaft over the crankshaft and side valves. The dark brown 3L valves are exhaust and dark tan 3.2L valves are intake. It only has triple exhaust manifold on each side, the exhaust passes between cylinders 2 and 3 and beside 1 and 4. ...and Yes! It has proper valve timing for each cylinder! You will see a thin white string. It prevents the valvetrain to jam with high rev and turning the engine upside down. Now I want to build a car for it. Perfect engine for a big hot rod!

I think I learned a lot about mechanical principles as a kid playing with Technic. The 8880 was very educational. Now I'm 36 and creating MOCs allowed me to discover "new" principles in my Cyclorotor boat and my self-locking differentials (I don't mean "new" like a world first, I just came to these mechanism by myself) I think Technic is the best educational toy and that's why I don't like "reversed" gearboxes and mini-scale fake engines.

It looks very clean. Very nice pictures! I like the tractor tires better but old style looks nice as well.

This other one is a WIP based on a thought about the 42130 m1000rr fake engine. The 4cylinder fake engine uses standards fake pistons and cylinder which are very small for a 1/5 scale: The displacement scaled up 5 times is ~310cm3 that's a bit ridiculous. I have bought lately a 2nd hand 42130 set and I d'like to try a 1:5 motorcycle MOC with a more detailed and bigger fake engine. So this is a 1/5 scale single cylinder with a camshaft and "valve rockers". Based on the KTM/Husquvarna 700cm3 big single with SOHC (single overhead camshaft) The displacement scaled up 5 times is 900cm3 that's a bit too much but I think it's a good base.

This one is less detailed. It only has overhead camshafts but It's a V8! Every cylinder has two cams. The timing is realistic with gray intake cams and black exhaust cams Camshafts are driven by the crankshaft through 8/24/20/16 gears

Thank you! Yes I would love to see more realistic details in a fake engine in an official Technic set.

Hello! Happy new year! These are two small models basically empty shells. The helicopter has linked rotors and sliding door The seaplane has folding side floats, scale is 1/80 Despite the lack of functions I like how I came to the recognizable shape of the aircrafts. That's why I wanted to share before they are gone into pieces The nose of the Sikorsky is made with 3 claws from 42042

Thank you. Yeah it works but this version was not strong enough for max torque. Some cracking noises when pushing it too hard. I meanwhile rebuilt it 100% with bulletproof mechanism. It can handle the torque until the XL motor stall. Coming soon on Eurobricks!

Last day of 2022... It's about time for me to update my group B series started in May. Here is another Lancia which symbolise quite well the paroxysme and the end of Group B. It was one of the most extreme and dangerous rally car with a turbocharged/supercharged 1.8L 4cyl. 500Hp engine, 4WD and a rollcage made of cardboard or slightly better. Group B stopped after a deadly crash of a Lancia Delta S4. The model features: - 4WD with 3 differentials, lockable central diff - HOG + functional steering wheel (HOG at the back, the wastegate exhaust pipe) - Rear suspension (two possible holes to pin the shock absorber. Low for the shelf and high for the play - 4 cylinders inline engine - The doors and engine bay can be opened with closed retention - Detailed cockpit with seats, dashboard, radio, diff-lock lever. Some proportions are a little off but at this scale I think it is acceptable

The first one. from Monster trucks, green Mustang and FormulaE

This MOC is on my shelf for a while. I wanted to share it. It features: -Twin Pull Back motors, 1 for each back wheel geared 16/20 (more torque) -Fake engine inline 2 cylinders with differential -HOG steering (spare wheel at the back) One of Henry Ford's famous quotes about the Model T was, "Any customer can have a car painted any color he wants, as long as it is black." The Model T only came in black because the production line required quick drying paint only aviable in black.

Thanks, I don't know if something similar existed or if it's even doable for a real vehicle. I came with this idea without exterior inspiration and I'm really happy with how it works. The system still works with small angles and locks past 25-30° and it's a good thing indeed!

This was a side project, maybe the Sherman tank engine inspired me. This is an inline 2 pistons engine with double camshaft and 8 valves. The valves are parallel to the piston which is not common but still realistic. The combustion chambers are open to the sky (as usual with fake engines) with 4 valves each Camshaft are driven by 12/24th gears. Gravity alone closes the valves, this doesn't allow high rev but side-valve engines are typically high-torque low-rev engines. I hope you'll enjoy it! Merry Christmas!

There are some more! I built a 2WD rover with live axle And thanks to I now have a new more compact and study configuration:

With four 42132 kits you'll have enough of them if you have 50€ to fix that...

Thanks! It's nice and compact, i will give it a try. I don't have much 7x11 frame. I don't like using gears just beside the diff. with high loads. It's a weakness in my truck.

How did I not see that? Yeah thanks. it's even better of course. I fixed that.

It looks very nice! Have you tried with a crankshaft like the 42132 motorcycle? It makes the pistons movements more realistic and doesn't take more space

Here is my next try, with your ideas in mind - I used 24t gears for the chain, to give it a better mechanical advantage. (I had problems with chain snapping on the truck) and the perfect tension is provided with two red free gears. - I tried to fit the centrifugal system in the smallest place possible.

Thanks, There is still some improvement needed but for sure it has some potential.

Lately I experimented a bit with differentials, trying to create a self locking system. I used a secondary diff beside the main open diff. It works "backward" with two input axles and the diff gear as output. the left wheel is linked with left input 1:1 gear ratio and the right wheel is linked with right output with 1:1 chain ratio. With this configuration the secondary diff output doesn't rotate when the car runs straight and rotates slowly when steering. When a wheel loose traction, the other one stops and the secondary diff output rotates fast. I use this output to rotate a centrifugal device with two arms. when the device rotates fast enough the arms step aside and lock against a well-placed obstacle. (yeah... I know... that's obscure. see the video! ) The tuck is 4WD with one XL motor and auto lock diff for each axle. Full independent suspension, wheel hubs with planetary reduction. L motor for steering, functional steering wheel Dimentions : 40 x 23 x 20 cm Weight with batteries : 1.6kg (the motorcycle boots used for traction test in the video are 1.6 kg each) It still has some flaws I want to fix. The weak point of the self lock diff is the chain, I want a 100% gear system. The steering radius is not great. Front suspention is too soft. Rear axle system: FRont axle system What do you think about this system?