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HomeAircraftHelicopterMain Discussion › "Quasiturbine" motor!
10-12-2005 10:02 PM  12 years agoPost 1
gigi

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Port-au-Prince, Haiti

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http://auto.howstuffworks.com/quasiturbine.htm

It's been a long time since I've been thouroughly impressed with a new concept for a powerplant. It's too bad they don't list spec's like max rpm, Etc. But I'd assume it's along the lines of a Wankel, meaning 8,000 plus rpm for one big enough to power a full-size car.

What i want to know is when O.S. Max is bringing out a 1.2 cubic inch version, and whether it'll cost 1/4 the price of a turbine

Note for those who don't know howstuffworks.com: Don't miss the animated GIF's for the different other motors, such as the radial, the Wankel, Etc. They are really good!

Gigi

My heli spending has gone way down since I got a Honda 919 :-)

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10-12-2005 11:57 PM  12 years agoPost 2
MattUK

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Lancaster, UK

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Nice
so the way it works means zero vibration...INTERESTING !!

heli's are just begging for a motor with low vibration

very good source for all engines, You learn somethin new everyday !!

Cheers Gigi

Matt.

----
Light travels faster than sound. That's why some people appear bright until they speak.

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10-13-2005 12:28 AM  12 years agoPost 3
marked23

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Lynnwood, WA

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It appears there are too many moving surfaces that need to have good seals. Heck if we could come up with a single good moving seal system, stirling engines would be more popular.

This thing, while simple enough to understand by looking at it, is still too complicated to compete with a plain old piston.

I understand that the company sells samples that run on compressed air. What's up with that? I can put propeller on a pencil and have an engine that runs on compressed air. Far more energy is spent compressing the air in the first place, than the motor produces. A lame sample at best.

If they want to show this thing working, it needs to run on high-density fuel, like hmm.. gasoline.

-Mark

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10-13-2005 02:59 AM  12 years agoPost 4
Heliscat

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Dublin, CA

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i think i remember OS having a wankel engine.
http://www2.towerhobbies.com/cgi-bi...p?&I=LXBY72&P=0


Mazda uses a 3 "vaned" piston.

What I would like to see is a fuel injected engine similar to this

http://www2.towerhobbies.com/cgi-bi...p?&I=LXVW87&P=0

No more fussing with needle settings. and you wouldn't have to have an extra amp such as the GV1.

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10-13-2005 10:58 PM  12 years agoPost 5
gigi

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Port-au-Prince, Haiti

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Feed-back loops and hybrid helis
The 1.40 RX-FI is a technological marvel, but I do believe it takes a little bit to set it. In other words, it's not fool-proof. But it should still be better than a plain old 2-needle carb.

Like most things, I'm sure the real-world experience is not quite up what the advertisement written from the manufacturer would lead you to believe. I'd love to hear some feed-back from someone who runs one.

I don't think the time is far that a heli will be designed for a motor of that size I'd hate to be the one feeding its thirst, 'though.

Sometimes, I think the best heli would by a hybrid: Have a motor run at a fixed setting, driving a generator, which charges the batteries that the heli runs off of. When the motor dies, the battery should be able to give you a full 3 minutes to land without stress. The motor would be easier to tune, the rotor rpm would be easier to maintain at a fixed setting, and you could hover at your desired rpm, plus or minus 500, if you felt like experimenting with your helicopter, without oversterssing centrifugal clutches, or overheating the motor. It would be akin to having a constantly variable transmission ratio. Dial in your power setting! Man, that would be awesome, I think... With the newer brushless motors, controllers, governors, Lipos, Etc., I'm sure it's not only possible, it's viable. 'Wonder when we'll see one.

Gigi

My heli spending has gone way down since I got a Honda 919 :-)

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10-14-2005 01:11 AM  12 years agoPost 6
Heliscat

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Dublin, CA

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- What you speak of is electro-motive. Most modern locomotives use diesel engines to power generators which run electrical motors that turn the wheels.

As far as a 1.40 size, i was just using that setup as an example and would like to see the same setup for perhaps our 50-90 class engines. I am sure it would cost a lot but helis arent cheap. I like the idea of an alternator keeping out batteries peaked.

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10-14-2005 10:58 PM  12 years agoPost 7
gigi

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Port-au-Prince, Haiti

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Not electro-motive...
The difference being that I do want batteries on board. The locomotives you speak of don't have batteries, the generator runs the traction motors directly. They shunt the motors in different series-parallel combinations to vary the power.

I'd like a battery in the heli, in case the motor driving the generator conks out, but also to prevent collective changes from affecting the load on the motor. That, to me, is more properly called a hybrid.

Of course, it's all semantics We know what we mean, right. And I agree with you, it would be cool in a 50-size heli.

I think a great benefit would be to be able to hover on battery power only in one's back-yard before dinner. Haha! And this on the same machine that would fly balls-out on glow fuel at the field, without any changes whatsoever.

Damn, I've just invented a concept, I think! Remember, you read it here first.

Gigi

My heli spending has gone way down since I got a Honda 919 :-)

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10-14-2005 11:32 PM  12 years agoPost 8
HugeOne

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Quebec, Canada

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Go here for more infos: http://www.quasiturbine.com/EIndex.htm

It's great invention! very powerfull, zero vibe, less pollution...
I first seen it 3 years ago. This thing is very nice as a steam engine as it don't need "clean" steam, very usefull to produce electricity. The actual design is less complicated than the aimated gift we see here. When a gasoline version will show up, things will change or maybe it will go in the forgotten tirror with all the goods inventions.

Raptor e620 w/V-bar, Tango 45-06, Phoenix 85HV, TrueRC 12S1P 4000mAh

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10-15-2005 12:24 AM  12 years agoPost 9
Heliscat

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Dublin, CA

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gigi, i think it would be a helluva idea. i like the idea of hovering on battery power and then going "balls out" nitro. It would definately increase the oohh-ahhh factor in these helis.

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10-19-2005 11:18 PM  12 years agoPost 10
gigi

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Port-au-Prince, Haiti

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Great link!
Thanks, Huge One!

I've book-marked it.

Heliscat, I'll bet you it would be a piece of cake for the electronics wizards of Castle Creations, and whatever other outfits make those brushless motor controllers. Or Rbort! Come on, Raja! Build us one of these babies.

I'm imagining a cluster of 4 regular-sized brushless motors, arrayed at the front left, front right, rear left, and rear right of the main gear, as the rotor driver. And now, we can put the engine in a different orientation, such as with the crankshaft facing the tail-boom, with the alternator mounted longitudinally in the frame, like a turbine

Gigi

My heli spending has gone way down since I got a Honda 919 :-)

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10-20-2005 06:18 AM  12 years agoPost 11
IYKIST

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London united kingdom

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There is also a rotory engine invented by Michael Rodrigues http://www.satellite-engine.com which is free from vibration and noiseless and can be made smaller than most model turbine engines and equally as powerful and he also made another called the Quad read about it.

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10-20-2005 10:58 PM  12 years agoPost 12
gigi

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Port-au-Prince, Haiti

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Amazing...
I can't believe there are still more ways to make a motor

And we can rest assured more are on the way.

Too bad we won't have oil to keep running them

http://www.lifeaftertheoilcrash.net/

Gigi

My heli spending has gone way down since I got a Honda 919 :-)

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