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Old 07-13-2006, 08:52 PM   #1
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Default New engine ideas

I was looking over my Novarossi P5X earlier this evening, and it occured to me that the current nitro engines we all use haven't changed much in, well... years! There was recently talk of 4 stroke development, but I just couldn't help thinking that even this step was a bit too conventional, then it occured to me.

What about rotary engines?

I've been an admirer of this innovation ever since Mazda won Le Mans with a rotary-engined car some 15 years ago. While the engines are very different in configuration, they seem to use far fewer parts than regular piston-driven powerplants... Plus the sound on the Mazda 787B was just unreal!

In all likelyhood, I could easily see a single-rotored microengine used for 1/8 cars. It could most probably be made more compact than the designs we currently use, and maybe just as powerful, if not more so.

Any thoughts on this?
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Old 07-13-2006, 09:21 PM   #2
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I dont imagine it would fit into our cars very well. It might have to be too tall, but then again, I suppose the radius of the rotation wouldnt be very large at all. Not any higher than where the glo plug already sits on our engines. OS does already offer a rotary engine for RC airplanes.

The next real development I can see happening is the Orion CRF engines when they come out with their big block versions. Aside from that I can't imagine anything to drastic will happen, but then again who knows?
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Old 07-13-2006, 09:26 PM   #3
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Hi Wheelnut.

I had no idea OS had a rotary unit. Don't suppose you'd have a link to a pic or some data?
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Old 07-13-2006, 09:45 PM   #4
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Default O.S. Rotary engine

Here's a pic. Look under 'www.os-engines'.
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Old 07-13-2006, 09:55 PM   #5
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It would need a fan or some sort of cooling suplement. There is no head to enlarge on it. It could be a good idea, how much does it weigh?
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Old 07-14-2006, 09:10 AM   #6
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The OS unit is a dedicated aircraft engine, so I don't think it's suitable for cars. There are mixed feelings from aircraft RCers about it; it seems to drink a lot of fuel though, but looking at how much development has gone into piston engines to get them where they are versus how much has been done with a rotary, that seems like barely an issue.

Davidka, that's actually a possibility, and not just with a Wankel: perhaps a cooling fan could be fitted to the crankshaft to help cool the engine... So many interesting concepts to persue...
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Old 07-14-2006, 09:20 AM   #7
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Electronic fuel injection would be a great development. No more tuning nitro engines for ever changing conditions, the electronics could do it for you based on ambient temperature, barometric pressure and exhaust temperatures.
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Old 07-14-2006, 03:06 PM   #8
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Quote:
Originally Posted by Iceracer
Electronic fuel injection would be a great development. No more tuning nitro engines for ever changing conditions, the electronics could do it for you based on ambient temperature, barometric pressure and exhaust temperatures.
there is some 4 cycle by OS for airplanes that does that already, if only they made one for 2 cycle cars...
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Old 07-14-2006, 03:15 PM   #9
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or maybe the ablity to fine tune from the controller would be nice
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Old 07-14-2006, 06:10 PM   #10
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Quote:
Originally Posted by Myt3rocks
or maybe the ablity to fine tune from the controller would be nice
You must be reading my mind. I've wished there was a way to do just that for years. Especially at the track. Imagine the possibilities.

No two tracks are the same, and it's never the same weather conditions. Sure would save a lot of time and headaches. The person who invents that would certainly be able to retire.
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Old 08-09-2006, 02:20 AM   #11
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NO TROUBLES AT ALL.
If you do not find a way to cool down the O.S WANKEL engine, i made a
car with it and found the solution. See the join picture and with it, the
engine is kept down in temp to around 80°c at maximum load, in OFF ROAD.
OFF ROAD is certainly worth for the engine.
The engine is great in power ( too much ), response, fast ( too fast ).
Difficult to hold a STADIUM TRUCK with so much in it.
At stat and when the 2nd speed goes in, it is always wheelie.
Only disadvantage, THUSTY......
Anyway, great fun and superb noise.... Rumble and beautifull.
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Old 08-09-2006, 07:48 AM   #12
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Now that is very cool! What engine is that?
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Old 08-09-2006, 07:49 AM   #13
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wow! i want one! lol. can you shoot a video of it in action? most digital camera's have a video recorder, even if it is only for 30 seconds...
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Old 08-09-2006, 08:57 AM   #14
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That rotary in a car is very impressive. Here's a link to the fuel injected airplane motor, but look at the price:

http://www2.towerhobbies.com/cgi-bin...?&I=LXALM8&P=0

No wonder they haven't tried to adapt it to cars, it'd double the price of the motor.(those competition pattern airplane guys are used to spending thousands on everything!) Although, from an industry standpoint, why would they bother with complicated and expensive electronics. They make so much more money when the average noob burns up a motor and they replace it...It's A CONSPIRACY!!!

More than likely, the electric cars will soon overwhelm the nitros with beter, more consistant perfomance(brushless), and soon...long enough run times to do 15 minute mains. I like the rotary idea, it's cool, and I bet the sound is awsome in person. But the fuel economy, or lack of it really, will prolly keep this one in the garage-project arena.

Great work by the way, that thing looks like alot of fun to drive...wheelies in second gear... Do you have pics of the whole thing, not just the motor?
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Old 08-10-2006, 11:37 AM   #15
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It seems you are interested.
It runs well. Engine noise is totally beautifull. You cannot imagine.
Sounds like a dragster at idle and when opening throttle it flies with a
multi-cylinder engine noise.
Here are some more pictures.
The way to start it is funny.
Look at the stand i made for it, but it works great.

Many of you ask for vid + sound.
Never done it. I will try and as soon as a friend will do,
i will post it.

Anyway, before having it, you can dream of it, because the
sound is a dream.
Bye.
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