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Scrapbook of Experimental Rotary Engines

Uploaded by: RotaryICEman
Video Description:
This is a follow-up to my previous Experimental Rotary ICEs video. It shows the family tree & close-ups of the prototypes that haven't been cannibalized for spare parts. The earliest sketches for some of these models date back to the early '80s. Work has been carried out since then whenever time & $ permits. Thousands of man-hours later & with the benefit of hindsight, many of these designs are admittedly naive. However, they were a necessary part of the learning process. The work continues & the current designs are more refined.
The latest model produces 1/5 horsepower on the dynamometer & it does so without requiring any lubrication, or a cooling system. Performance should improve with the next generation seals. Some models have been dry run (no combustion) for months at a time without any problems. The wear properties of graphite-on-polished-steel are truly unbelievable! The advantages of being able to modulate the vane engagement (for ganging up & throttle control) is very noteworthy.
Three new designs are currently on the drawing board. One uses a single rotor & 2 vanes to compress & burn the charge. In another version, the vanes pivot rather than slide. A third design uses graphite lined metal rotors & vanes. The purpose of this program is to develop more fuel efficient engines. These videos are intended to inspire & motivate interested parties into building their own prototypes for the benefit of all. -Dave

Tags for this video: alternative biodiesel combustion efficient energy engine experimental fuel gasoline hybrid hydrogen internal oil rotary

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And, this fuel/ ... ( 1 year ago by hopeso)

And, this fuel/ignition system could be used on a rotary for even greater efficiency and simplicity.

Wow, you have lots ... ( 1 year ago by RotaryICEman)

Wow, you have lots of vids! Maybe you can create a fuel recipe optimized for Model 32. I've tried 2-stroke mixes; they lubricate & seal well (outperforming gases such as Propane) but emissions suffers. Emissions really plague rotaries & especially piston 2-strokes whose well-known scavenging problems require complex remedies. I've tried improving them for years with no success. Some are experimenting with vegi-diesel versions of my designs but there are issues to overcome.

A agree, however, ... ( 11 months ago by RotaryICEman)

A agree, however, all things considered, I think that it'll be a while before Fuel Cells & EVs become competitive with ICEs on a level playing field.
Rotaries are thermodynamically disadvantaged compared to reciprocating designs due to their larger surface area. This is offset by the absence of lossy cams, linkages & crankshafts. Also, piston velocity approaches zero near TDC when combustion temp & losses are their greatest. In rotaries, the rotor velocity is constant.

The ICE market is ... ( 11 months ago by RotaryICEman)

The ICE market is driven by automakers. Most alternative ICE designs are just 'different', but not necessarily better. Many are impractical. Most target power density & few specifically address efficiency. Cash strapped automakers living day-to-day, heavily vested in reciprocating technology/tooling won't stick their necks out on any radical new technology risk; there's nothing in it for them. Only market demand based competition or legislation can overcome this hurdle.

U fail 2 realise ... ( 10 months ago by 23607)

U fail 2 realise that EVs utilize electro magnatizm for propultion. ICs use thermal xpanshun. The latter is a stronger force output given an input. Meaning a Kg of H2 burnt gives more energy than if you extract the electrons and produce electricity. So no EVs r not the future because cars r going 2 go fastr and fastr and u will escape EVs optimal eficience range. 4 inner city travel yes 4 everthing else no.

Thats funny!! "its ... ( 10 months ago by 23607)

Thats funny!! "its practical limits" We r not even close 2 any kind of limit. U really think 70mph 110ishkmh is the limit. Thats very myopic of u. Obviously u know nothing about aerodynamics or mechanical design 2 say those.... well....VERY stupid things.

Excuse me if I ... ( 10 months ago by 23607)

Excuse me if I seemed rude and 4 that I apologize. BUT flying is not practical in the near or semidistant future. It would b cool but its not going 2 happen in ur life time, sorry. And why in he hell r u talking about flying. The discorse was about ev vs ce not cars and plains. Whats wrong with u? Look look do u just want to do this all at 1nc? PM me and I'll show u how wrong u r. No offence this time:)

Check my channel ... ( 7 months ago by RotaryICEman)

Check my channel page & other videos for status updates.

my rotary is a ... ( 7 months ago by TommeyLeeReed)

my rotary is a great design..

GREAT JOB!!! And ... ( 5 months ago by faridperez)

GREAT JOB!!! And this was what youtube was intented for...

NOTICE: I finally ... ( 3 months ago by RotaryICEman)

NOTICE: I finally started posting the sketches, pictures, schematics, source code, etc on the Yahoo! Group: 'Open_RotaryEngine'. I have hundreds of files to post, so it'll take me a while to finish it. Please read my commentary there BEFORE attempting to build your own engine, or before submitting any questions. Have fun. -Dave

much respect. Thus ... ( 2 months ago by JakesArnoose)

much respect. Thus stuff inspires me and designers and machinists like yourself will be the ones to move forward and break free from the shackles of automakers.

Nice work, ... ( 2 months ago by rotaryinnovator)

Nice work, RotaryICEman. Would it much better if we form a club of rotary engine enthusiasts leading to rotary engine production? I for one have a rotary engine of my own given free in the internet.

I agree that things ... ( 2 months ago by RotaryICEman)

I agree that things would progress much faster with a coordinated effort, but I've tried in the past, without success. It's very difficult to reach consensus among a group of people with different agendas, skill levels, etc. I think that the best that we can do is to share our ideas & test results, etc. in forums such as these. You should mention your design in my 'Model 32' video which gets the most viewership & also on the 'Open_RotaryEngine' group.

Stupid question but ... ( 1 month ago by justinbimmerman)

Stupid question but how are you makeing a seal between the rotor and the lexan? Is it just tight tolerance?

I've abandoned ... ( 1 month ago by RotaryICEman)

I've abandoned Plexiglas & Lexan because plate glass is more stable & rigid. I've tested plastic, glass & metal covers with both graphite & metal rotors. The seals are spring-loaded graphite inserts. Only they contact the glass cover. They seal well (without a drop of oil!), but they don't wear very well, especially the corners. Any dust, or grit in the air can cause severe seal damage! Most people mix oil with the fuel which helps allot, but it's a dead-end solution.

Hi RotaryICEman. ... ( 3 weeks ago by JakesArnoose)

Hi RotaryICEman. Could you please tell me a bit more about model 15? Success? Failure? I am currently building a compressed air version of this principle.

Model 15 is based ... ( 3 weeks ago by RotaryICEman)

Model 15 is based on the old, classical, rotary vane architecture which is used in so many pumps. I later switched from internal to external vanes so that I could modulate vane engagement & so that I could replace the vanes & seals without a complete engine teardown. It was built out of steel, brass, bronze, and aluminum (before I adopted graphite) so it required 2-stroke fuel. It was a simple, quiet, smooth running design, but lubrication was a problem. (continued)

(continued) I did ... ( 3 weeks ago by RotaryICEman)

(continued) I did allot of testing using compressed air & it would be a very good design for pumps & air engines. There are springs between the 2 vanes pushing them outwards. Note that this region becomes a varying volume as it rotates & that it could be made much larger, opening up the possibility for a number of other interesting uses. Good luck with your design.

Thank you for your ... ( 3 weeks ago by JakesArnoose)

Thank you for your feedback. Very helpful. I really enjoy watching your videos. In light of the current energy/fuel crisis and global warming have you considered focusing your knowledge and skills towards a non combustion engine? All your designs would work so well with compressed air!!!

One more question. ... ( 3 weeks ago by JakesArnoose)

One more question. If model 15 ran well like you say, and the only issue was lubrication, would it still need lubrication if it were just an air engine? Could the air serve as a form of lubricant - like a tiny pocket of air slipping through the seals? Thanks

Many are developing ... ( 3 weeks ago by RotaryICEman)

Many are developing air motors & most are much further along than I could ever be; I'm just a guy in a garage. I feel that a more efficient ICE is more urgently needed. It's a more difficult task than developing air motors. Keep in mind that compressed air is not really a source of energy but rather a means of storing energy like a battery. In all likelyhood, the air will be compressed (not very efficiently) with energy that ultimately comes from burning some sort of fuel.

Lubrication is not ... ( 3 weeks ago by RotaryICEman)

Lubrication is not the only issue, but mitigating friction & wear is certainly the biggest issue that's holding back most rotary engine designs. I did experiment with some of the techniques that are used in air bearings as you mentioned, but they require great precision, cleanliness & mechanical stability. A big design challenge & a difference between air engines & ICEs is the large temperature changes & material issues (such as expansion) that arise from this.

Well, the majority ... ( 4 days ago by RotaryICEman)

Well, the majority of ICE applications are in transportation. The external combustion engines that I'm aware of have various disadvantages such as: slow starting & warm-up issues, slow acceleration, etc. There's a Yahoo! group "Open_RotaryEngine" with drawings & stuff.