Build & Test Lego Engines: V8, U12, H16, X24, multirow-radial-42, S100

More engines. Bigger ones. Enjoy!

00:00 V8: 8-Cylinder V-Engine
01:04 U12: Twin-Straight-6 U-Engine
02:38 H16: 16-Cylinder H-Engine
04:38 X24: 24-Cylinder X-Engine
06:11 42-Cyl 7-Row Radial-6 Engine
09:49 S100: Straight-100 Engine
11:34 side-by-side and sound comparison

Buy a full kit for the first 5 engines:

Download part list and instructions for the first 5 engines:

Note: In real life the U12 and X24 have 3-throw crankshafts (pistons are 120 degrees apart) and the 42-cyl has a 6-throw crankshaft. Those are a bit complex to do with Lego so I used simpler 2-throw cranks (180 degrees). Thus firing orders are not correct in those engines. Also the 42-cyl Zvezda M503 was done with radial-6s instead of the real life radial-7s because I couldn't find proper Lego parts for connecting pistons to the crankshaft. The Sherman 6046 U12 engine gearing and phase offset between the shafts were unknown to me so I just guessed them to be 1:1 and 90 degrees. In other ways the models should be correct (hopefully). The V8 has a flat-plane crank that were used in Formula One engines. Lotus 46 H16 flat-plane crank, gearing and phase between the shafts should be correct according to the schema image I found (shown in the video). The U12 has both crankshafts rotating to the same direction as was explained in mapleleafup forum.

Photo attributions:
"Kimi Raikkonen 2007 Britain 2" by Rob Snell (CC BY 2.0)
"Sherman M4A2E8 at CFB Borden" by Balcer (CC BY 2.5)
"Lotus 43 Goodwood Festival of Speed 2015" by neilhooting (CC BY 2.0)

[CAMELOT]

"I'm only here to see the V8"

*12 minutes later*

"Amazing."

[melodysketchdraws]

"s100 straight-100 engine: never used anywhere?"
[Sees the engine]
Gee I fuckin wonder why

[jffcks]

At this point he's just flexing how many technic piston engine sets he has

[noahpettibon]

For the first time in my life, I instantly understood the terminology of engine classes. Thank you for that! Orientation of pistons and number of pistons!

[jeremypalmer]

It's wild that even though they are made of lego and being reverse driven they still have the characteristic rumble of a race car, plane or boat.

[Whatshuangdoin]

“What’s so loud down stair honey”
“Don’t worry it’s just my 42-cylinder 7-row Radial-6 engine”

[tommysedin]

That 42-cylinder monstrosity gave me a newfound respect for the engineering of engines.

[harveypotts]

I love how they sound pretty accurate to the real engines

[antoniomarques]

I’m surprised these little plastic pieces have the rigidity to reach 3000 rpm

[chodad]

this man’s living out my childhood dreams bruh

[BuddysDIY]

I'd honestly buy the new of these little lego engines. My friends and family always ask me how engines work and this would be an awesome little teaching model!

[Thatdavemarsh]

Your 42 radial engine...wow! Great work!

[DarkneszFalls]

Damn that h16 really started to sound like an engine when it was nearing 3k!

[CrispyMC]

The fact that Lego engines actually produce a somewhat similar sound to their full-size equivalents baffles me

[LanceThumping]

Can't wait to see the inevitable team up with a machining channel to get fuel lines running to these things to try out for real. >:D

[Strelnikov]

I loved watching the I100 walk itself sideways with the shaft torque. So cool.

[bryan]

It's crazy the difference in sound each engine makes as he does the test runs. Noticeable difference between the twin-6 and the h16

[kaseymathew]

"This was difficult to get to 3000 RPM."
That doesn't look like it was ever DESIGNED to go 3000 RPM.

[opaschmockyyy]

Crazy to imagine, that F1 cars just have a LEGO engine inside them

[julianspatter]

Sometimes I forget how strong Legos actually are. This is one of those videos that reminds me.