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HelicopterMain Discussion › A general question on "Nitro" engines.
10-08-2017 08:13 PM  11 days agoPost 21
JuanRodriguez

rrProfessor

The Villages, Florida

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heliraptor10
I think you need something to make your eyes work...
I have 20/20 vision ! And I'm pretty good at judging BS when I see it !!

Been there, done that and old enough to know better.....

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10-08-2017 10:27 PM  11 days agoPost 22
heliraptor10

rrKey Veteran

kokomo, in-US

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Then you didn't watch the first video on the passive fire tornado.

Common sense tells you that if you put a bunch of stuff around a fire you're blocking its air supply. But if those walls are angled vents then you're accelerating it.

I'll make it real easy...

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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10-08-2017 10:58 PM  11 days agoPost 23
heliraptor10

rrKey Veteran

kokomo, in-US

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Watch at YouTube

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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10-08-2017 11:22 PM  11 days agoPost 24
JuanRodriguez

rrProfessor

The Villages, Florida

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This has no relevance to nitro engines......

When you get done at the end of your “experiment “ do you pull that device off and use it to smoke your @hit ???

Been there, done that and old enough to know better.....

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10-09-2017 01:09 AM  10 days agoPost 25
heliraptor10

rrKey Veteran

kokomo, in-US

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Ok bye,

I'll talk to people with imaginations from here on in. People with even very tiny imaginations can probably make the leap that really hot air behaves with similar expansion properties.

Or you can stay and make fun of me,
I'm oblivious.

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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10-09-2017 01:13 AM  10 days agoPost 26
JuanRodriguez

rrProfessor

The Villages, Florida

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heliraptor10
Or you can stay and make fun of me,
I'm oblivious.
You’re doing a pretty good job of that on your own !!

Been there, done that and old enough to know better.....

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10-09-2017 02:05 AM  10 days agoPost 27
heliraptor10

rrKey Veteran

kokomo, in-US

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JuanRodriguez
You’re doing a pretty good job of that on your own !!
And I'm the one whose pointless?

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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10-09-2017 02:30 AM  10 days agoPost 28
heliraptor10

rrKey Veteran

kokomo, in-US

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I have more important details, should anyone wish to PM me. I've left out a part.

If you were to have tried it as shown, It probably would have died. Especially if you gave it throttle. There is something that has to happen inside the muffler first. This was a problem I had to overcome.

I'll leave it at that.

Oh and my truck is a T-Maxx with a 3.3 if you care to compare visually. Best estimate I found for this vehicle is 45mph top speed.

I'm gonna see how fast I can get mine before I get scared the tires will blow...

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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10-09-2017 02:43 AM  10 days agoPost 29
jbjones

rrVeteran

Columbus, Mississippi

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You need to compete. If this is a viable performance edge, then get out there and whip some butt.

The racers that I run with are old, mean, smart guys. A whole lot smarter than most give them credit for, but they know performance. And they're right. Performance is the standard.

Race that machine, or give the tech to a modeler that does race. Report back. Good luck.

If you haven't...go hang out in the pits at a model boat race. You'll learn real quick how far behind you are.

J. B. Jones

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10-09-2017 04:32 PM  10 days agoPost 30
heliraptor10

rrKey Veteran

kokomo, in-US

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I'm trying.
Not a lot of local people running these.

My plan is to give this idea away grass roots style.

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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10-10-2017 05:29 PM  9 days agoPost 31
heliraptor10

rrKey Veteran

kokomo, in-US

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I tried to do some speed runs.

This thing is super unstable at high speed (I think I might put an old heading hold gyro on it ). So I only had the stones to get it up to 30mph.

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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10-15-2017 02:52 AM  4 days agoPost 32
heliraptor10

rrKey Veteran

kokomo, in-US

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Here's a tear down including the "secret" I hadn't mentioned yet.

Watch at YouTube

Working on a new version that adds forced air to the mix. But instead of being a scoop to force air in the engine the scoop will feed this exhaust system.

Yes I'm planning to use forced air to improve exhaust flow. Yes I know forced air at these speeds and volumes is a joke and could never be a factor as a scoop for the air intake. I understand why this should be another pointless part on another pointless invention.

But I don't think it is.

More to come

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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10-15-2017 12:50 PM  4 days agoPost 33
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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Adding a vacuum pressure at the exhaust will only help to overcome the flow restrictions.

In other words running an open pipe will have the same effect.

All engines need some back pressure to run properly in their power band.

spending time, paying attention

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10-15-2017 07:01 PM  4 days agoPost 34
EEngineer

rrProfessor

TX

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Check out YS engines...

Logo 600SXs, 700XX, 800XX

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10-16-2017 02:47 AM  3 days agoPost 35
heliraptor10

rrKey Veteran

kokomo, in-US

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If that means "buy something better"
That's a silly thing to say to me.

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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10-16-2017 04:47 AM  3 days agoPost 36
EEngineer

rrProfessor

TX

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What it means is that YS engines have been turbo charging their engines for decades now.....the technique is nothing new....

Logo 600SXs, 700XX, 800XX

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10-16-2017 01:01 PM  3 days agoPost 37
ssmith512

rrKey Veteran

Indianapolis, IN USA

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Isnt extracting the exhaust gas through acceleration the exact OPPOSITE of what you want to do with a 2-stroke motor? Doesnt a tuned pipe do the opposite?

Steve

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10-16-2017 02:11 PM  3 days agoPost 38
EEngineer

rrProfessor

TX

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Exactly what a tuned pipe does....

Logo 600SXs, 700XX, 800XX

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10-16-2017 07:16 PM  3 days agoPost 39
R.J.

rrVeteran

SF bay area, CA USA

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Did someone already mention that instead of pinching the fuel line, if you cover the exhaust outlet, it will stop the engine?

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10-16-2017 08:42 PM  3 days agoPost 40
EEngineer

rrProfessor

TX

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Good point, but usually one pinches or removes the fuel line to stop the engine rather than block the exhaust.

Logo 600SXs, 700XX, 800XX

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HelicopterMain Discussion › A general question on "Nitro" engines.
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