Author Topic: Enya's new venturi.. (Read 3937 times)

MarcusCordeiro · « **on:** December 10, 2013, 05:45:53 PM »

Well....

Marcus

Brett Buck · « **Reply #1 on:** December 10, 2013, 06:18:56 PM »

Quote from: MarcusCordeiro on December 10, 2013, 05:45:53 PM

Well....

That is likely to perform the same function as a diffuser, which is good. For stunt I would rather see it with much less trumpet shape, but it might not make much difference if there is enough turbulence generated by the vanes.

Brett

Steve Thomas · « **Reply #2 on:** December 10, 2013, 06:34:09 PM »

Whether it makes a difference or not, I'm just happy to see a mainstream manufacturer doing new things with CL engines. Full credit to them.

GregArdill · « **Reply #3 on:** December 11, 2013, 03:16:54 PM »

It is a sexy looking little beastie, eh?

It would be a very mean thing to run up on the lathe.

My guess is that it's originally designed for RC car market, and if it has any useful function at all, it is to help organise the airflow into the rc carb. Such a device would hardly be needed in a FI engine with a prop stirring the air IMHO.

Still as Steve says it's good to see something new in CL circles (yes pun intended)

Greg

Chris Wilson · « **Reply #4 on:** December 11, 2013, 06:36:47 PM »

Looks like my Dyson vacuum cleaner.

Brett Buck · « **Reply #5 on:** December 11, 2013, 09:42:53 PM »

Quote from: GregArdill on December 11, 2013, 03:16:54 PM

Such a device would hardly be needed in a FI engine with a prop stirring the air IMHO.

I think we have more than adequate evidence that just having a prop flopping around in front of it is not sufficient to overcome the other flow effects, but I am certainly not going to try to convince anyone.

Diffusers and other devices to make the flow in the venturi uniform and turbulent are critical to steady stunt runs.

Brett

Mike Scholtes · « **Reply #6 on:** December 11, 2013, 10:21:58 PM »

Enya has developed more new CL Stunt engines than anyone I can think of, even CL diesels in multiple sizes. They deserve a lot of credit. Too bad their engines are not more widely seen in CL. I have their new-design 40 and 61s and they are excellent. This new venturi must have been developed by somebody who knows what he or she is doing, so it will be interesting to see how it performs.

GregArdill · « **Reply #7 on:** December 12, 2013, 04:55:31 AM »

Well shut my mouth

I've done what I should have done first - Looked at the Enya site. 'Splains it all.

http://www.enya-engine.com/spiralventuri_E.html

Looks to be purpose designed for CL, and I still think it looks sexy.

Am having a little trouble with the text though...."A whirlpool suppresses exfoliation"

Greg

Phil Krankowski · « **Reply #8 on:** December 12, 2013, 06:47:14 AM »

Probably their favorite translation program at work.

My rather rust fluid dynamics seem to want to say that by making a thin boundary layer against the outside of the intake, and turbulent flow everywhere inside the boundary layer then intake flow will be maximized for the cross section.

Pretty cool stuff.

Phil

Brian Hampton · « **Reply #9 on:** December 12, 2013, 08:44:25 AM »

I'll take a guess that "exfoliation" means less spit back out of the venturi because of the swirling effect giving a longer flow path. Bell mouthed (trumpet shaped) intakes are more efficient than a straight tube which is one reason why they're used on things like Weber carbs.

Joseph Lijoi · « **Reply #10 on:** December 12, 2013, 10:45:35 AM »

Quote from: Brett Buck on December 11, 2013, 09:42:53 PM

I think we have more than adequate evidence that just having a prop flopping around in front of it is not sufficient to overcome the other flow effects, but I am certainly not going to try to convince anyone.

Diffusers and other devices to make the flow in the venturi uniform and turbulent are critical to steady stunt runs.

Brett

Rifling (a spiral grrove cut into the venturi) might have a similar effect. Maybe Randy Smith or someone who knows about guns and engines might have tried it. It might improve the velocity of the airstream, so it may be possible to use a larger venturi (more volume) at the same rate of speed.

They are putting rifling on some saxophone necks and it make a big diiference.

Steve Thomas · « **Reply #11 on:** December 12, 2013, 02:20:19 PM »

'Exfoliation' in my wife's case seems to involve some sort of dermatological boundary layer separation... So my best guess here is that Enya are trying to avoid exfoliating (!!) the BL inside the venturi.

Chris Wilson · « **Reply #12 on:** December 12, 2013, 03:50:39 PM »

What the heck is a "Sloat Part?"

Brian Hampton · « **Reply #13 on:** December 12, 2013, 09:02:37 PM »

"A whirlpool suppresses exfoliation of the Sloat part and raises filling-up efficiency."

A possible translation

"A swirling airflow reduces boundary layer turbulence in the venturi throat and increases mass air flow."

Other than that, beats me

.

Chris Wilson · « **Reply #14 on:** December 12, 2013, 10:09:47 PM »

My own take on all of this is that the extra swirl 'may' help prevent the fuel/air mist from being (exfoliated) stripped from the (Sloat) jet under violent G force maneuvers.

And possibly desensitize the jet's rotational position.

You can't get a better spit back mechanism than a through spray-bar so I don't see that this is the intention of it.

But they claim an efficiency gain - as in more power for longer for the same amount of fuel used?

I reckon that the log jam of the through spray-bar would negate a lot of what is intended at the jet.

Randy Cuberly · « **Reply #15 on:** December 13, 2013, 12:37:31 AM »

I would expect the through Spraybar to spoil whatever directive and turbulent effect the vanes might have...It's possible they might have some difusser type effect but highly questionable.
It's obviously a molded part and maybe it just looks sexy!!!

Randy Cuberly

GregArdill · « **Reply #16 on:** December 14, 2013, 03:37:04 AM »

I went into the Japanese version of the site, then put the Japanese description through an online translator and got this
"CL spiral Venturi, Coming Soon

Rotate the air in bladed air funnel!

Charging efficiency UP suppress the release of the throat by the eddy!

Rotate the intake air in the inner blade of six"

So my reading of it is that the vanes are meant to rotate the air in the venturi to suppress the release of air from the throat by creating a stronger eddy.

sounds like it could work, and as others have said - it's great to see some thought given to CL engines.

Greg

Douglas Ames · « **Reply #17 on:** December 14, 2013, 10:48:09 AM »

Bottom line - More efficient atomization of the fuel at the spraybar.
Looks promising

John Leidle · « **Reply #18 on:** December 21, 2013, 07:59:46 AM »

Neet, now do they produce engines we can use?

Steve Thomas · « **Reply #19 on:** December 22, 2013, 02:17:19 AM »

Quote from: John Leidle on December 21, 2013, 07:59:46 AM

Neet, now do they produce engines we can use?

Yes.
http://www.enya-engine.com/ListCL_E.html

GregArdill · « **Reply #20 on:** December 23, 2013, 03:00:17 PM »

Quote from: John Leidle on December 21, 2013, 07:59:46 AM

Neet, now do they produce engines we can use?

Not only that, but Enya's engines are well engineered, long lasting and service is exemplary!

Greg

MarcusCordeiro · « **Reply #21 on:** December 24, 2013, 03:22:02 PM »

Here's a vídeo of my buddy Martin flying his Tundergazer, 70 oz, using the Enya 61 CXL RS PRO, with Randy Smith pipe and Eather 3-blade.
That's the same set up I'm using in my TG.... Tons of power...

Marcus

John Leidle · « **Reply #22 on:** January 15, 2014, 02:58:41 PM »

Does anyone sell the .61 CXLRE ??

RandySmith · « **Reply #23 on:** January 15, 2014, 03:26:54 PM »

Quote from: John Leidle on January 15, 2014, 02:58:41 PM

Does anyone sell the .61 CXLRE ??

I do but they have been back ordered for past 2 years....

Randy

Luke Spreadborough · « **Reply #24 on:** February 26, 2014, 07:47:12 PM »

These are currently available, fits a 13mm sized hole (SS40-S, SS 45-S etc) until they add to the range.

https://cs206.xbit.jp/~w041133/store13/index.php?main_page=index&cPath=3_19