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Old 3rd March 2008, 18:29   #16
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Given that Jesse did manage to build a trike based on a Peterbilt semi engine - a Cummins 14 liter 12 cylinder monster.

If he made that run, he can definitely make this work
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Old 4th March 2008, 10:11   #17
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These engines are having rotating cylenders rather than ratating fly wheel.
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Old 4th March 2008, 10:32   #18
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Quote:
Originally Posted by Ajaybiz View Post
These engines are having rotating cylenders rather than ratating fly wheel.
Hi Ajay, are you sure ? Sure, the initial WW1 aircraft like the Sopwiths had rotating radial engines, i.e. the crankshaft was attached to the frame with the prop fixed to the rotating cylinders. But as the engines got more powerful, spun faster, & grew heavier, they found that having a huge mass like that spinning around creates gyroscopic precession. You'll find that by WW2 most radial engines were being used in the conventional sense, i.e. prop attached to the crankshaft & no spinning cylinders !

If the cylinders in these bikes are indeed rotating, handling would be quite an issue, especially in the blue bike. Plus of course, there's the issue of the spinning-in-your-face exhaust stacks

Last edited by im_srini : 4th March 2008 at 10:34.
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Old 4th March 2008, 11:51   #19
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RotecRadial Specs


all right found tech specifications on this site, check this site for other details too.
these guys even ran dyno on the bike, they have that in the photo tour!

and they still manufacture this in Australia just check the site fellas!
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Old 4th March 2008, 11:57   #20
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Yep seen many times in Discovery n other related channels that how they use to rotate.
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Old 14th June 2009, 01:04   #21
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Default Sheer Insanity

I guess there is never a saturation point to how much cubic inches or how many cylinders is really enough. God bless America for they can find even radial aircraft engines in their junk yards....Truly Insane

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Last edited by theMAG : 15th June 2009 at 01:49.
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Old 14th June 2009, 10:20   #22
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Damn! That looks NICE! What are the specs?
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Old 14th June 2009, 11:16   #23
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Truely amazing! Is that thing going to rotate ?
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Old 14th June 2009, 11:25   #24
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AMAZING!!! This is truly insane. Any idea on the specs?
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Old 14th June 2009, 18:22   #25
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errr specs?? I have no clue guys, may be a billion kazillion horse power I guess
When something looks like that I dare not ask any questions coz its gonna go over the top of my head anyways.... But if anyone can tell me if thats a wankel engine or a radial engine or do both mean the same ??
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Old 14th June 2009, 23:00   #26
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Yes, it is a radial engine. IIRC the Mazda RX8 uses a radial/wankel engine. The picture shows the working.
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Old 15th June 2009, 00:45   #27
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I thought as much, as I had a fair idea that wankel engines had a triangular sort of piston and that it rotated inside the cylinder (which negates the use of a connect-rod) and made me wonder how a piston could hop through so many hollow cylinders.

Are you sure thats a wankel engine. I am not though coz i thought wankel engines (courtesy Mazda Rx8) had a triangular sort of piston that rotated inside the cylinder..I could be wrong .
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Old 15th June 2009, 01:27   #28
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Quote:
Originally Posted by hyper123 View Post
Yes, it is a radial engine. IIRC the Mazda RX8 uses a radial/wankel engine. The picture shows the working.
Attachment 147903
The engine in the bike above is a rotary engine, it is not the wenkel engine.

The wenkel is used in the mazda rx7/rx8

Wankel engine - Wikipedia, the free encyclopedia

Rotary engine - Wikipedia, the free encyclopedia
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Old 15th June 2009, 17:02   #29
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Quote:
Originally Posted by nitro.1000bhp View Post
...Are you sure thats a wankel engine. I am not though coz i thought wankel engines (courtesy Mazda Rx8) had a triangular sort of piston that rotated inside the cylinder..I could be wrong .
You're right. It is NOT a wankel engine.

Quote:
Originally Posted by nitro.1000bhp View Post
.....But if anyone can tell me if thats a wankel engine or a radial engine or do both mean the same ??
I don't think the terms radial and wankel can be interchanged. However, wankels are referred to as rotary engines, but not the same type of rotary as techn0l0gist has mentioned.

Quote:
Originally Posted by techn0l0gist View Post
The engine in the bike above is a rotary engine....
Actually its not a rotary engine either.

If im not mistaken, in a rotary engine the cylinders rotate, and the "crank shaft" is motionless.

Eg :


I think the correct classification for the bike engine is a radial engine.

Simply put, the cylinders are arranged radially around the crankshaft. Its similar to how engines are classified as I, V, W (eg. I4, V6, W16 etc). Its a cylinder arrangement, though i wonder if this could be referred to as an R6 ? (or maybe an O6 - since its going more by letter shape than initial!)

cya
R

PS - the rotary engine (like the one in the video) remind me of a brushless electric motor commonly used in R/C airplanes called an outrunner.

Typically in a brusless motor, the magnets are on the rotating shaft in the center, and the coils are around it, fixed to the casing of the motor.

On an outrunner, the coils are in the center, but they are fixed, and the magnets are on the outside which spins! Hence the name.

The advantage of this is more torque (more leverage), which means that a gearset for the props can be eliminated - which in RC aeromodelling means weight saving = awesome.

Last edited by Rehaan : 15th June 2009 at 17:10.
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