rainedave

My Feedback: (1)

That Webra is so cool! I'd love to have of those. I wonder how it stacks up to my Webra Blackhead rear exhaust? Not quite 1/2A.

David

Japanman

Not sure about the international situation, but here in Japan there was a popular .11 pylon class that I imagine helped give rise to the OS.11 and Enya .11 engines, that I would think where then used as car engines, it could have been the other way around though.
  I was recently given an O.S CZ.11 engine, and I am interested to see how it compares. Only problem is, the liner bore is not round. Still, it came to the right place- I`ll put a hone through it it should be good to go.
 It is tempting to send it to O.S for them to repair.  It may be less of my time to put the hone through though.[:-]

 J.M

rainedave

My Feedback: (1)

One thing that spurred me to run this engine was reference to the Enya CX.11 in another post (the Picco thread, I think). Anyway, It'd be great if someone would tach a CX to see how it compares.

David

Dan Vincent

Australia used to include .11 engines in their 1/2A Pylon class. From what my Australian friends tell me the OS CZ-11 was the hot ticket and was fast right out of the box.

I recall seeing an article somewhere that showed an Enya .11 converted to rear rotary and several other hopped-up engines for that class.

I've wantedto seea Formula-10 Pylon class for many years butit never happened in the USA.

There has never been a USA class specifically for 1.5cc or .09-.11ci engines butalmost everyone has at least one. The old AMA class "A" was for engines up to .19ci so the little .09 would have had a rough time trying to compete.

With the light weight radio gear of today and schneurle-portinga .10 racer should be faster than the Quarter-Midget .15 models of the sixties and seventies.

Japanman

My friend built a new .11 pylon plane recently, and we took it out for a fly. It was powered by a re-worked CZ.11 with a single blade prop and full speed cowl. If you have seen the pics of the little tony you will know how well made this was too-
 in the air, this plane moved out. Speed is very hard to judge, but I would say it was doing over 80mph. It was kitted out with modern gear and the setup looked just lethal- i was very impressed with how rock solid it looked at all speeds and attitudes, and I must say the CZ put out more Umpf than I was expecting.
 I can see why it would be a fun class to race.

 J.M

 

mtntopgeo

My Feedback: (12)

I don't have a problem with the ST carb(s), it's the size of this thing. I can barely pull fuel to/thru it at WOT. Maybewith a 5x4 prop, I could get enough air flow to use more than 50% of the present carb. As it stands now, I wentto crankcase pressure. (see the pic). ......George K.

mtntopgeo

My Feedback: (12)

Got several of the Enya 11 CX engines. None modified, & of the ones that I've run, performance is very repeatable (engine-to-engine). They don't appear to like a "big" prop. (A pre-GF3 MAS 7x4 is about as large as I've tried to use, & the RPMs would fall to about 18,600on 15% nitro. More nitro didn't make much difference, but I didn't do any other experimenting (c.r., or glo-plugs). APC 6.3 X 4 ran at 19,000, I did run a 6x5 Graupner, but can't find any record of such. Think that it was a tad lower than 19,000. .................... George K.

rainedave

My Feedback: (1)

Thanks George. The barrels on my small ST carbs are about 7mm. The aluminum insert/restrictors bring them down to about 6mm. I agree that is still large for engines of this size. I have no idea why my .11 runs well without the restrictor. Using a smaller fuel tank or a check valve in the muffler pressure line might help, who knows.

The Enya sounds like it's in the same general range as the ST. They are a bit pricey at $116:

http://www.enya-engine.com/store/ind...roducts_id=292

David

stg61abc

Hello Dave. The numbers from your X 11 are just fabulous !. 20 K for a sport engine is real very strong. I also have a X 11, but mine is C/L and has 1 BB. The engine is so strong that i detuned it, adding 2 more head gaskets, since the compression was very high. With this mod, the engine is more even and the carburetion is more linear, since i ever fly it a little rich, never peaked. I use 25% all castor and no nitro on it and it´s running superb. In the air, the sound of the engine resemble of a pylon engine. The ST X 11 is one of the best 10/11/12 engines made in all times, only surpassed by the wonderful Enya CX 11, that have greater power than the ST (said by a lot of the best magazine columnists..)
Enjoy yours...

MJD

My Feedback: (1)

One of the Speedcup videos, '08 maybe, has a Webra .12 powered model that hit 160-something. I just bought a Profi .061, I'm determined to see how fast one of these can go.

MJD

Japanman

My CZ.11 only came with a venturi- which is 8.4mm so the rc version of your supertiger x.11 having 7mm would seem about right to barely work on suction. 

 J.M

stu62

We used to race 1/2a with those motors using a bolly 6*4 1/2 on straight fuel 80 20 no carby as big a venturi as could be made to fit and crank pressure 23000 rpm was top fun cheap racing

doxilia

My Feedback: (3)

I thought you guys might enjoy seeing two recent acquisitions Imade. The first is a NIB X11 (1.8cc - recent version) which Ibought for nostalgic reasons (but really don't have a project in mind - any suggestions for a pattern fan?) and the other is a broken in Webra Speedy 12 (2.0cc) REthat came with header and TP. I'm quite enthused by the latter engine and being a pattern guy, I thought it would be fun to build a reduced 40" classic for it. Thanks to RD's excellent suggestion and plans mastery, I expect to build a 40"wing span Brushfire for it. The engine will be mounted inverted with the pipe nestled in the belly pan. I 'm considering a 3 oz Hayes tank but happy to consider 2 oz if all you guys feel that's more than plenty. I'm hoping for a max wet AUW of 33 oz.

Isuspect that, based on what you racing guys have to say,the noise output with a straight TP will be more than some might enjoy so Imay have to consider a muffled pipe for it which would add 2" to the exhaust length. Against convention, I hope to prop it for a 15-17K output with somethig like a 7x6 (APCmounted) or possibly an 8x4 if Ican manage the ground clearance.

Fun to be out in strange forum lands...

David.

combatpigg

My Feedback: (3)

Not sure what your intentions are? Are you looking for speed? 15-17,000 rpm is what you would get with a $60 .15.

rainedave

My Feedback: (1)

I have no idea what those piped Webra 2ccm's turn, but the cool factor is off the chart. It's like a miniature pattern engine. APC makes a decent range of props that might work with it: 6.5x5.0, 6.5x5.5, 6.5x6.0, 6.5x6.5.

David

HighPlains

My Feedback: (1)

Maybe the early slow QM with sport engines, but the later ones with Nelson's ran over 130 with ease.

DeviousDave

Send me a pre-addressed box/cover postage and I'll send you mine. Igot the motor and extras from a friend who obtained the motor for the Flying Models test years ago. I've never run it and don't plan to so it should go to a new home.

doxilia

My Feedback: (3)

Now there's camaraderie for you! Most generous of you DD. RD, if he accepts it, is the right person to send it to. Soon enough, he will have specs for it too and knowing him from exchanges in the classic pattern forum, he might just do something very cool with it.

My intentions for this engine are simple. As mentioned by RD, this is like a mini pattern engine which is what Ifound appealing about it. It is also RE which is quite rare at these displacements today so I had to have it.

As reduced scale classic pattern aircraft have their cool factor too, primarily due to the fact that they are few and far between, that's what I'd like to do with it. As mentioned, I'd like to build a 40"span Brushfire with airfoiled tail surfaces and hollowed out partially skinned wing cores. My main concern is whether the engine will run properly inverted with the tank in the position it would have to go in the aircraft. Iwill test this on a stand and if it is successful, I'll proceed with the project. Otherwise, I'll have to choose another design.

I'm debating whether to pick up a 2.5cc muffled pipe as it would keep sound in check. This would add 2" to the exhaust length which complicates the build of the model somewhat. I strongly suspect that the engine will at least match the X11 under the same conditions but I'm more interested in vertical pull than all out speed so Imay prop it a little longer. The first owner had apparently broken it in with a 7x6 as recommended by Webra but he didn't recall any static run figures. His intentions were to build a DF model with it. The engine even includes a ~2"carb extension to allow it to be accessed from atop the fan housing.

Attached is a photo of the full 60 size classic. (Ihope its acceptable to post a non engine photo in this forum. Please let me know if it should be removed. Idon't want to contaminate RD's thread).

David.

lfinney

My Feedback: (44)

the webra .11 has a horsepower peak at 28k so mid 20's would make it happy   , this is from the webra literature

doxilia

My Feedback: (3)

lfinney,

My engine didn't come with any literature specific to it. Do you have any documentation for the 1.8cc that you could share? A picture or two of the manual would be great!

TIA, David.

sst2000

Hi . Saw your post about X.11 I have a RC one and would like to convert to Free flight do you know where I can get a straight venturi, spray bar assy for one of these..

combatpigg

My Feedback: (3)

Hey neighbor......

Check with Texas Timers. They sell Free Flight goodies and have hundreds of contacts, plus I think they have a message board.

doxilia

My Feedback: (3)

You could also check ST direct to see if they happen to have any parts for it. I have a G15/20 that I bought with a CL venturi but unfortunately the bore of the inlet is larger than that in the X11. The various auction sites as well as the wanted lists might help. You could also check Robair on the auction site as he has several parts for ST engines. He might just have what you are looking for.

Good luck, David.

DeviousDave

Sadly, this still is modern performance..... Nobody ever took .10-12 sized engines seriously after the Webras and Enyas came out. The ASP .12 is as close to a hot throttleable 2cc engine you can get right now, and I don't think it's much more powerful than this .11X from the sounds of it.

These things are meant to be run!

Mr Cox

I've been hoarding a few of the webras myself, and I have a halfbuilt "Pirahna" plane for it too somewhere.
Does anyone have any more info on the "Pirahna"?