Re: What's the highest HP that can be squeezed from a 50cc?

to moby dick:

math is hard.

i took the numbers you threw out, but used BSFC math.

using some diesel motor numbers, 50% efficency, 0.278 BSFC i was able to fudge a VE number of 1914% for your motor.

could you check my numbers?

hey, you started it.

Re: What's the highest HP that can be squeezed from a 50cc?

Haha, I'm going to guestimate and say that's probably about right. Like I said, I didn't factor in air flow. Or physics.

Re: What's the highest HP that can be squeezed from a 50cc?

The Axiro rotary might be called "XR50" but it's 300cc (294).

Steven Sabatinelli Wrote:

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>

>

> 48hp wankle motor xr50

Re: What's the highest HP that can be squeezed from a 50cc?

♣Slew Foot♣ /

rand hemisheric 2t rotary, 42hp @ 40lbs weight.

interdimensional mopeds are needed.

Re: What's the highest HP that can be squeezed from a 50cc?

haha, that's epic! pretty cool to see tiny wankel engines

Re: What's the highest HP that can be squeezed from a 50cc?

This is exactly what I was getting at! I knew there had to be some theoretical math somewhere.. you took it to the extreme, but that's the point :)

Thanks for doin' the math here, pretty cool to see some of the theory behind it. It makes sense why no one has taken such a small engine to that extreme, it would be too impractical. lol

Re: What's the highest HP that can be squeezed from a 50cc?

No one asked you to read or post in it :)

Re: What's the highest HP that can be squeezed from a 50cc?

Haha, impractical is an understatement. Impossible is the word you're looking for, I believe.

Re: What's the highest HP that can be squeezed from a 50cc?

♣Slew Foot♣ /

the only reason i can think of that the rand hemi rotary was never implemented as a motorcycle engine is upon failure it's prolly like a shrapnel bomb.

Re: What's the highest HP that can be squeezed from a 50cc?

♣Slew Foot♣ Wrote:

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> the only reason i can think of that the rand hemi

> rotary was never implemented as a motorcycle

> engine is upon failure it's prolly like a shrapnel

> bomb.

Are you saying no one made a rotary bike? If so Norton, Suzuki and Hercules all did evem a few others on smaller scale and prototypes. Sachs holds the patent for the wankle I believe.

Re: What's the highest HP that can be squeezed from a 50cc?

I believe Norton is currently making a rotary bike, actually. It might just be for GP racing though.

Re: What's the highest HP that can be squeezed from a 50cc?

♣Slew Foot♣ /

no, i am talking two stroke rotary not diesel. totally different animal than a wankel type, it has 4 clamshell pistons for lack of a better word around the central axle and one firing position.

Re: What's the highest HP that can be squeezed from a 50cc?

Could you post a link or something? I can't find any reference to anything called a "Rand Hemispheric Rotary."

Re: What's the highest HP that can be squeezed from a 50cc?

Moby Dick Wrote:

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> Could you post a link or something? I can't find

> any reference to anything called a "Rand

> Hemispheric Rotary."

dude drops loads of acid or something no one knows what he is talking about.

> I believe Norton is currently making a rotary bike, actually. It might just be

> for GP racing though.

thats the word on the street if they happen to make a road bike I wont be able to afford it anyway.

Re: What's the highest HP that can be squeezed from a 50cc?

♣Slew Foot♣ /

ingersol- rand.

it is used as an emergency bilge pump for battleships and aircraft carriers

Re: What's the highest HP that can be squeezed from a 50cc?

Huh. You got some info? Still can't find nuffin.

I did just discover that IR did make some absolutely colossal conventional rotary engines for industrial use though. Cool.

Re: What's the highest HP that can be squeezed from a 50cc?

♣Slew Foot♣ /

it was posted here a while back, it outputs like 17,000 rpm

i am bandwidth impaired, and excuse me, i dropped lots of acid but that was 20 years ago.

it was industrial as it was not a drive motor but an industrial sump pump motor.

Re: What's the highest HP that can be squeezed from a 50cc?

328471023895608713462019823741287658734 Horesepower.

I didn't do math, physics, science or even think about it.

Re: What's the highest HP that can be squeezed from a 50cc?

bwahhhhaaaaahhh hahahaha needs this answer for every can i do this video. (edited)

Re: What's the highest HP that can be squeezed from a 50cc?

I agree with the original back of the envelope numbers, i.e. about 500ish. Ten times the displacement or 1000hp/ltr is the limit in production block drag racing. Until something is invented/ comes along to push the envelope further like kers or such. Turbo + NO2 + propane inj might get us close, I'll be trying...

Re: What's the highest HP that can be squeezed from a 50cc?

Math fail. 50cc 1/20 a liter, or 125 Hp. Seems legit with nitrometh and 10# of boost. Good luck reinforcing your gear train though, you're on your own (edited)

Re: What's the highest HP that can be squeezed from a 50cc?

Top fuel dragsters make somewhere in the range of 1 to 1.22 hp per cc, so in theory a top fuel 50cc engine would make somewhere from 50 to 61 horsepower.

https://en.wikipedia.org/wiki/Top_Fuel

Re: What's the highest HP that can be squeezed from a 50cc?

♣Slew Foot♣ /

altho if you got creative, and had an unlimited budget.

titianium cylinders/engine cases would be the way.

Re: What's the highest HP that can be squeezed from a 50cc?

Titanium cylinders would not help you in the slightest, but it would throw your heat dissipation out the window. Titanium is actually extremely insulative for a metal. It would look pretty neat though.

Re: What's the highest HP that can be squeezed from a 50cc?

♣Slew Foot♣ /

heat expansion factor to run hi temp...

Re: What's the highest HP that can be squeezed from a 50cc?

Top fuel engines are 8.2L v8. 8000 horsepower conservatively. My statement stands. We using drag racing or land speed as benchmarks locations? Would it matter? Again what transmission would handle this? Def not belts, sorry variated fans...

Re: What's the highest HP that can be squeezed from a 50cc?

Single cylinder naturally aspirated two-stroke about 30 hp with pumpgas.

Single cylinder naturally aspirated four-stroke, about 17 hp with pumpgas

In both cases very high rpm is necessary.

With multiple cylinders, compressors, exotic fuels… no one knows where the limit’s about.

Re: What's the highest HP that can be squeezed from a 50cc?

epic resurrection!

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