13,500 RPM Redline

Glenn F. · Dec 11, 2014

I know there are engines that scream even higher, but a
500 Honda I had not too long ago redlined at 13,500 rpm.
That's about 220 revolutions per second.

Can anyone help me comprehend this? 220 revolutions per
SECOND??

Thanks,
Glenn F.

Janicholson · Dec 11, 2014

When the pistons swap holes it is too fast. Look up model airplane RPM. Jim

JDemaris · Dec 11, 2014

I find the idea of a mechanical rotary diesel injection pump on a V8 engine like a Chevy 6.5 or Ford 7.3 even more baffling. At 3600 engine RPM, the injector plungers inject 14,400 times a minute and 240 times a second. And - many of those parts can last 1,000,000 road-miles.

rrlund · Dec 11, 2014

Can't imagine. My son builds some pretty high priced race engines and they run 8-9000 for spurts on the straightaways. That's plenty of revs.

Bob Harvey · Dec 11, 2014

Formula 1 engines RACE at 16-18 k RPM's. They also have to run 4-5 races in succession. Think of the technology and quality (not to mention price).

G1355 · Dec 11, 2014

I have a 2006 rm250 Suzuki dirtbike it'll run 10000 rpms, but it isn't made to run up there, made to get on it in the strait aways and let off a little in corners. But they also don't last long before they need an overhaul. At least there cheap to rebuild,

TomA in CA · Dec 11, 2014

Husky chainsaw revs 13000 too. No me likely.

BushogPapa · Dec 11, 2014

Yes, the .40 Nelson Racing engines are Designed for constant 30,000+RPM and the smaller engines will turn 40 and 50K.
The New Brushless Electric Motors in some cases will potentially turn 210,000RPM...but, all these are decidedly smaller than a full sized Racing engine.
Lithium Ion Batteries and Brushless Motors are taking over the Model Industry, with a Power/Weight ratio advantage over gas and Glow.
When the Auto manufacturers wake up and use this tech, the Electric Auto will really take off..especially when they start using small Diesels in the hybrids..
Ron.

Dean · Dec 11, 2014

The auto manufacturers are wide awake regarding lithium ion/brushless DC yet range remains the issue for electric cars.

Dean

BushogPapa · Dec 11, 2014

Think about and imagine the RPM of a Bullet fired at 4,000 Foot Per Second and Rotating once every 10" of forward travel....

We are talking around 4,700 RPM/Sec.
Or 282,000RPM....

That is a lot of extra Wallop, when the projectile makes impact..!!

Ron.

Eldon (WA) · Dec 11, 2014

(quoted from post at 16:16:31 12/11/14) I know there are engines that scream even higher, but a
500 Honda I had not too long ago redlined at 13,500 rpm.
That's about 220 revolutions per second.

Can anyone help me comprehend this? 220 revolutions per
SECOND??

Thanks,
Glenn F.

I bought a new Honda CB400F Super Sport in 1975 that had a 10,000 rpm redline....and it would hit it in the first 3 or 4 gears... Ten years later I designed a 100,000 rpm ID grinding spindle while working in the machine tool industry, of course it was electric and didn't have any pistons.

Glenn F. · Dec 11, 2014

Cycle is gone. Redline may have started atc10,000, but I
know it had a range that I thought ran up to 13.5 on the
tach. Oh well, I know it was screaming beyond my
comprehension, whatever it was.

I mow have a Harley. No more 13.5. Just FINE with me!

Glenn F.

Janicholson · Dec 11, 2014

Google- Very Very Very fast RC jet. Awesome. Jim

MarkB_MI · Dec 11, 2014

RPMs can be deceiving in reciprocating engines. After all, 10,000 rpm is no big deal in a turbine engine, so why should it matter how fast your crankshaft is spinning? You could probably spin that crank at 100,000 rpm if you removed the pistons and connecting rods from the engine.

What you really should be looking at is piston velocity. An engine with a 6 inch stroke spinning at 3000 rpm has the same peak piston velocity as an engine with a 3 inch stroke turning 6000 rpm. If you compare piston velocities between your motorcycle and tractor, you may be surprised to find they're not that far apart.

Formerly PaMike · Dec 11, 2014

A crank spinning in one thing. The truly amazing part is the connecting rods and pistons the change direction and accell and decell with every rev...

Phil9N3667 · Dec 11, 2014

Back in the '60s, Honda built some Grand Prix road racing bikes that turned up pretty good. The 50CC twin/dohc engine tach had 6000 for the first digits and peaked at 22,000!!

DLMKA · Dec 11, 2014

Honda made a CBR250RR that was made from 1986 to 1998 with an inline 4 engine that made 45 hp in the later models that redlined at 19,000 RPM. This was available off the showroom floor but never sold in US unfortunately.

fixerupper · Dec 11, 2014

Seems like I read about Japanese racing bikes that ran at 20,000-22,000 RPMs. They had gear boxes with quite a few more speed selections than street bikes because of an ultra narrow power band.

teddy52food · Dec 11, 2014

I do reloading & some bullets don't get to the target but produce a puff of smoke about 30 yards downrange.

BushogPapa · Dec 11, 2014

Most do not realize the stresses imparted on a high speed projectile..

The .17 Rem was known for "Blowing Smoke-trails".!

Ron.

Jiles · Dec 11, 2014

(quoted from post at 00:55:34 12/12/14) Husky chainsaw revs 13000 too. No me likely.

Yes, and some other brands turn higher.
I do a lot of chainsaw repair and I do not tune by holding the throttle wide open while adjusting the "H" carb screw.
This is recommended by most everyone but I do not see any sense in following this procedure.
The way I do it, is to hold wide open until it reaches max rpm, let off and do another adjustment and so on until it "fouurstrokes" (slight fluttering of exhaust). I then further adjust accordingly to make sure it doesn't fourstroke during the cut.
I follow this procedure because I know what's going on inside the engine at that RPM!

NCWayne · Dec 12, 2014

Just did the search and watched the video....all I can say is that is one Very, Very, Very fast little airplane.
Link to the mentioned plane

Mike (WA) · Dec 12, 2014

I think the plug-in hybrids like the Volt will emerge the winner- most people wouldn't use the gas (or diesel) engine from one week to the next, but they won't buy a pure electric because they take trips, too, and even with recharging stations every so many miles on major highways, most won't put up with the inconvenience. I sure wouldn't.

mkirsch · Dec 12, 2014

When the Auto manufacturers wake up and use this tech, the Electric Auto will really take off..especially when they start using small Diesels in the hybrids..

Pretty much every production electric and hybrid on the road uses a brushless motor and lithium batteries.

It's a whole different ballgame, moving a 32oz airplane around for 7 minutes, and moving a 4000lb car down the road 400 miles.

Model airplanes don't need range, and the power density of current lithium technology is adequate for most model airplane applications. Cars need range, and so far the best they've been able to muster is around 60 REALISTIC miles between charges.

Donald Lehman · Dec 12, 2014

I believe some of the modern race bikes turn as much as 19,000 rpms. Seems impossible that the valves can open and close that fast.

Donald Lehman · Dec 12, 2014

I had an old 1976 RM 125 that revved into the mid-13,000 range. Very narrow power band. Basically held wide open and shifted gears. A Bob Hannah stlye bike. (if any of you followed motocross, you know who Bob Hannah was and his riding style) Went through 3 sets of crank seals a summer, two sets of main bearings, couple of pistons and rebores per summer, Crank rebuild once a year. Resleeve the cyln. every couple of years. Still competative with early 1980's 125's if you knew how to use that narrow span of power. Of course things didn't cost what they do nowdays.........................

farmboy48 · Dec 12, 2014

when we used to race lawnmowers, we would run 12 hp Briggs around 5000 rpms, with governor disabled. Only had one rod let loose and come thru the crankcase. that was on an 8 hp b&s

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