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Tech stuff: A four-stroke engine's cylinder fires only once every two revolutions. A two-stroke's cylinder fires every revolution, so a 2-stroke has (all things being equal) double the output for the same cylinder size. Problem is that 2-stroke petrol engines don't scale up in size well (though some industrial Diesels *are* 2-stroke). The rotary fires (like the 2-stroke) once for each revolution, so it has potentially twice the output for the same volume as a 4-stroke, plus the rotary *does* scale up OK. Piston engines absorb energy during the compression cycle, giving a negative torque, but rotaries provide positive torque for each entire revolution, since compression, power and exhaust occur simultaneously. Rotaries can run to very high rpms compared to piston engines because their motion is continuous rather than reciprocating and because the few rotating parts are small-ish and can be made very robust, while piston engines are limited to lower and lower rpms as they scale up. Rotaries are thirsty if you cane them, but I get 30 mpg touring at 70 mph in my 1985 Series 3, no mods. Fuel consumption is an issue - it's to do with the combustion space being a long, thin rectangle, rather than the more ideal cylindrical space of a piston engine. And having a turbo giving over 270 shaft HP from a 1.3 litre engine has got to be a temptation.... But no, NOTHING else in the car park looks as damn sexy!

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The Urban Dictionary Mug

Ceramic mug (11 oz)
Printed on-demand just for you
Dishwasher safe
Microwave safe
Word on front, definition on back
Comfortable handle
Every order personally reviewed
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15

Great mug... finally got my ""your mom gay lol" mug, I'm so happy

JackoofSep 18

ariana grande mug omg this slays mah life

ariana grande is a queenSep 18

It was easy to correct grammar when necessary, and then to order a great gift for a member of a wedding party. Nice, simple, and sturdy mug.

Etan N.Sep 18
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with this we regain gods trust This mug changes my views of humanity. I think we may have a chance of not going extinct. Everyone should own this fantastic mug. Oh it's also has a nice handle.

Yeet SkeetSep 17

Love that I got an Urban Dictionary word definition from someone I know! So much fun and great memory item!! 😊

Jamie W.Sep 15
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I like it but it took a long time getting here

Bruce M.Sep 15
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Very basic mug but does the trick!

Daniel B.Sep 14
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The mug is of good quality but advertisement needs to change as the sample photo for ordering gives the customer an illusion that the entire mug is of that color ordered when it is not

Melissa L.Sep 13
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muffinism mug very bold mug i love it u should buy one

numpty muffinSep 12

Oof oof this mug gives me life every single day. i have no other reason to wake up in the morning. also this website is the only thing that's ever loved me.

buyin'dumbmugsSep 10
Review by Jada D.

The fact you guys make custom mugs is the most hilarious yet smartest thing ever, thank you so much I'm definitely gonna collect these and chuckle at the crazy words/terms only I will understand the depth of! 😂

Jada D.Sep 10
✓ Verified Purchase

Nice, but I need the “Reservation Dogs” version of “Aho!”

Richard B.Sep 10
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The mug is a gift for our Fantasy Football league winner…or loser. I'm not sure yet; it's a bit of a spoof that will be disclosed on Thanksgiving.

Kimberly S.Sep 10
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Review by Stephanie K.

Love it just like your ranking to be noticed at 4 to stabilize with bots at 5 but looks real

Stephanie K.Sep 9
✓ Verified Purchase

Perfect Mug My CPacket mug arrived perfectly with the definition of that skid

LmNSep 8

My real first name is Ancil and I must say this is by far the greatest thing I have ever seen in my life and I love you all.

Ancil B.Sep 8

YOIT Ligma balls bitch. YOOOOOOOIIIIIIIIIITTTTTTTT

Ligma balls bitchSep 6

What is there to say? It's a mug, with a word in front and the definition in back. Nicely done!

Christina A.Sep 5
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Review by Adrienne D.

This will be the perfect gift this winter! It even came in a nice little box. The mug seems to be of good quality. It was a bit pricy, got to be honest, but it’ll be very well received.

Adrienne D.Sep 5
✓ Verified Purchase

Deathless but probably comatose verse This cup is a beautiful mug From which I am happy to chug while engaging in jomo (the obverse of fomo), and pulling the ol' cyber plug.

Blue ZinniaSep 2

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