RE: Why not a Webra engines thread?
 

Yours is looking pretty good too Dave - and cleaner as well. When time permits I'll try & make mine shine a bit more. Seems I will need to fashion a baffle come butterfly exhaust thingo out of some sheet metal & see how it goes. Those polished spinner nuts add a pleasant touch.

I ran mine earlier in the year, dont recall the RPM exactly on the APC 9 x 4 prop using my standard home brew (for this type of engine) : 10% nitro, 20% Castrol M castor & 70% BP Methanol. Next time, I will leave out the nitro & increase the oil to say 22% to 23%.

The Webra started easily & was very well behaved. I'm very pleased with it [8D]

RE: Why not a Webra engines thread?
 

Be careful with the head gasket and cylinder to case gasket if you disassemble yours. They are brittle. The head gasket in mine is made of some strange material that reminds me a bit of mica. It's sort of shiny with a kind of mineral look to it. I cut new gaskets for the cylinder to case and the backplate out of brown automotive gasket paper. You can see it in the photos. Mine has very good compression and should start pretty easy. My experience with these old carbs is that they act more like high/low throttles. These engines would be good in something with the decalage of an old Class I or II model... climb and dive.:D

David

RE: Why not a Webra engines thread?
 

Hey, this is a Webra thread...

Get those old OS Max baffles out of plain view... ;)

RE: Why not a Webra engines thread?
 

Where do you see an OS?:D That's a Webra 3.5ccm (with an OS exhaust baffle).

See, "Made in Germany.":D

David

RE: Why not a Webra engines thread?
 

Dave - I've just notice something (perhaps this is old news to some of the "in the know modellers") ) - your engine has "Made in Germany" under the exhaust whilst mine has "Made in Austria". Seems that some Webra engines were made in different locations ? [:-] The 2 countries share a common border & perhaps the engines were / are made in neighbouring factories. Anyway, this all adds to the pleasure of owning a Webra [8D]

RE: Why not a Webra engines thread?
 

Well Dar, I guess you'd have to call my engine a Deutsch-Nippon hybrid. The glow plug is an OS, too.:D

Bone, I also noticed your mounting lug doesn't have the etched-on serial number like mine does.

David

RE: Why not a Webra engines thread?
 

-


The baffle piston engines, like the 10cc Blackhead, were made in Germany. The schneurle ported engines were made in Austria.


Ed Cregger

RE: Why not a Webra engines thread?
 

Yes Dave, interesting indeed. No serial number on the mounting lug BUT I did own another example of the Glo-Star that DID have a serial number on the lug (but can't recall if it was Austrian or German manufacture). I sold that engine during a brief spell of stupidity. Also, the engines have 3.5ccm on the transfer port casting but my box says "3.40ccm" - refer my pics in earlier post.

And another thing that makes tuning the needle valve difficult (when the OS muffler is attached) is that the needle vavle is on the exhaust side of the engine. The hot muffler gets in the way & it's so easy to burn your fingers [&:] Oh well........... [8D]

RE: Why not a Webra engines thread?
 

It started by hand a lot easier than I thought it would. The A3 plug seems to be a good choice.

David

RE: Why not a Webra engines thread?
 

I was just given a Webra 10 CCM (Speed 61), but missing the muffler and spray bar/needle valve. Does anybody have theses parts and willing to sell at a reasonable price ? The Webra site shows this engine uses the TN II carb.

I might be able to use an OS 61 muffler - it has the same hole spacing, but the port is smaller than the Webra engine. Will that be a problem? Do you know of any other makes that will work with the Webra?

Bob H

RE: Why not a Webra engines thread?
 

http://www.bissonmufflers.com/en/muf...imageField.y=7

Bob, here is one possibility but its a Pitts muffler and my .61f wearing an MVVS 3255 Quiet Muffler.

RE: Why not a Webra engines thread?
 

Quote:

---

ORIGINAL: BobHans

I might be able to use an OS.61 muffler - it has the same hole spacing, but the port is smaller than the Webra engine. Will that be a problem? Do you know of any other makes that will work with the Webra?

---

Bob,


The port size, according to Dave Shadel. will have no effect, unless you reach, or exceed 20,000 RPM.

The OS port is also '.61 sized'...


MVVS .61-.91 mufflers also have the same bolt-spacing of the Webra Speed .61 and OS.61FSR.

They will still be quite easy to find.

RE: Why not a Webra engines thread?
 

Here's something I've never seen or heard of ever before. Anyone know the history on this one?

It's described as a Webra 10cc Copper Version, and supposed to be displayed in their museum, but it's new to me.

Is this thing painted, or is it all cast in copper? It looks painted to me...

I do like the black anodized carb and prop plate.

It's sitting on eBay right now.

RE: Why not a Webra engines thread?
 

If you look close that engine is pretty well beat up, someone trying to slide one of on everybody. If you look at the top edge of the carb it has been painted crudely and the copper coloor is very thin on the engine. It is a SilverLine .61 circa 60s or 70s. It also shows signs of having worn a strap on muffler quite a while.

RE: Why not a Webra engines thread?
 

Perthonally, I liked the thilver one betta.


Ed Cregger

RE: Why not a Webra engines thread?
 

That's what I'm thinking too...

Nothing on the box says it's a commemorative. Looks like someone just painted up a standard 10cc and anodized the aluminum.

The piston port looks clean, but it could have just had a good cleaning job if it was used.

Looking at the inside corners of the rear cover, it looks like its simply just been painted over.

The "Copper Version" is stated it is a special production, but it still puzzles me...

RE: Why not a Webra engines thread?
 

My .61 in ther foreground has never been on a plane, its little brother in the background has flown an USAircore Colt 40 many times, it takes about a year to burn 8 oz of fuel.

RE: Why not a Webra engines thread?
 

I wish I had my original Webra Speed .61 w/Dykes ring back. What a wonderful engine, after I got rid of the Dynamix carb and replaced it with a $10.85 (sale at Tower) HB carb.


Ed Cregger

RE: Why not a Webra engines thread?
 

LOL!! A Dynamix victim. Once I get a boat built (about a three year quest now) and a Speed put in it, I'm going to PROVE those carbs work (somehow)...

RE: Why not a Webra engines thread?
 

Here's a question,

Whats the product number on the standard 10cc Webra? Would a tuned pipe work on it? Or is the timing not right for a pipe, and really could only use a muffler?

RE: Why not a Webra engines thread?
 

The old cross-flow 10ccm is model #1020:

http://www.webra-austria.at/motor.ph...e=AERO&lang=EN

The Speed is model #1024:

http://www.webra-austria.at/motor.ph...e=AERO&lang=EN

David

RE: Why not a Webra engines thread?
 

It's the #1020 cross-flow I was wondering about. Thats the one. Same as that "copper" or Silverline version above.

With that being a baffled piston, does a tuned pipe have any performance effect on something like that or would it be more of just a fancy muffler?

RE: Why not a Webra engines thread?
 

I have the 10cc all cleaned and ready for new bearings now, the cylinder wear doesn't look too bad but I bet it could use a new ring. Who carries parts for the #1020 other than Webra-Austria? I looked through Horizon, RCMadness, Liesure Time, ect.

I found a set of steel bearings that fit the life left of the sleeve at the right price at rc-bearings and got to wondering if it is worth hunting down and buying a new needle bearing for the connecting rod.

Does anyone know where I can pick one of these up and how to install it without damaging it? If they are cheap enough, and easy to get, I'll try and replace that at the same time.

Waiting for Tower to have a spiral carb spring in stock for behind the throttle barrel I can buy seperate unlike the Webra small parts set.

Did anyone know if there is a micro size O-ring in this type of needle barrel? They show a small O-ring to seal the needle in one of the sets but not sure for which carb uses it.

RE: Why not a Webra engines thread?
 

Hey Dave. The adapter is really quick and easy to make with the right tools and equipment. Here is an Enya muff on a Fox .45. :D Cause I couldn't afford the 30 something bucks for the factory muff. not when I have a box of odd mufflers laying here.

RE: Why not a Webra engines thread?
 

Hi!
A pipe will do wonders to all engines!!!
Try one and you will see !

RE: Why not a Webra engines thread?
 

Froggie...I mean Ed, I like the thilver von twoo! Hey not many more post for you to hit the 8000 / 8K mark!!! Keep up the good data rolling Your a good Man..or frog!:D:D

RE: Why not a Webra engines thread?
 

Can anyone define what makes a Webra a Webra? the Silverline .61 looks a lot like my Enya 60-III. A real good runner in it's own right.

RE: Why not a Webra engines thread?
 

My 3 webra`s are fantastic. 36, 91, and webra/west 50

The 91 is a little heavy, but it is extremly reliable.

RE: Why not a Webra engines thread?
 

Just noticed there is a Webra Speed .32 in the Classified section ;)

RE: Why not a Webra engines thread?
 

Here is another Webra engine! Capt,n

RE: Why not a Webra engines thread?
 

Wow that's awesome. It looks like a two-piece head, and a twin plug. Is that a West engine? I'm guessing its Webra's 90 aircraft engine. Definetly not a Webra fuel pump back cover...

RE: Why not a Webra engines thread?
 

Hi,

I picked up a .61 speed on the bay for $43 and it is in great shape it has been run but not a lot. Is there a way to date this engine there are no #s on it but the exhaust is not drilled or taped for a muffler.

I have ordered a MVVS muffler from Dar. and I will drill and tap the engine.

RE: Why not a Webra engines thread?
 

I learned later that the Dynamix is an excellent carb, IF you know that it was designed to be used with a fuel pump. I had German in high school, but it didn't help me decipher the instructions for this wonderful engine.

The HB carb's shank was too large, but a short session with my file (before I had a lathe) had the HB carb setting in the Webra Speed .61 looking and working just like they came from factory together. The engine ran great with the HB plastic carb. I sold the Dynamix to a friend, after using it for one summer without a pump. Just to get that far took a lot of "tweaking" with files and needle nose pliars.


Ed Cregger

RE: Why not a Webra engines thread?
 

-


I don't know of an official dating scheme, but if it came with a Dykes ring (right at the very top of the piston), it was made around 1980 or slightly after. Later models were offered in ABC and ABC/ring versions, IIRC.


Ed Cregger

RE: Why not a Webra engines thread?
 

I have a couple of official Webra parts documents which they have sent to me that cannot be found at their website. I thought I would post them up for reference for anyone that could use them. It would be great if anyone else could do the same with any hidden documents they might have. There's also a set of Dynamix instructions that can be hard to find.

What is strange about the #1020 motor is the parts explosion and parts list do not show wrist pin safety clips, even though my motor has them. Anyone have an idea which e-clips to use on it? I can't find any clips that carry the #1020 prefix. I also noted the size of each gasket is different for the housing, and needs to be that way. Is this a matched set when you order it?

RE: Why not a Webra engines thread?
 

Thanks for those files Jetpack. They will be useful.

Reading the Dynamix instructions I noticed two things. One, they were written by Yoda. Two, the section on the Idle mixture contradicts itself. At the end of the first paragraph in section 3 it states that clockwise richens and counter-clockwise leans. In the following paragraph it states the opposite.

David

RE: Why not a Webra engines thread?
 

[sm=bananahead.gif] Yep. I figured out you just have to remember the more you turn the thumb wheel in, the richer the idle setting because the throttle plate closes off more air while the mixture tube stays the same.

Sometimes I think Webra's other buisness is puzzle making.

RE: Why not a Webra engines thread?
 

Question.

I just finished restoring a used #1020 Blackhead marine. I noticed a difference between the carb barrel diameter and the carb body, which causes a step in the bore on the low speed side of the carb.

The barrel bore is 7mm and the carb bore is 8mm. A difference of 1mm.

First of all, is this the right size bore for this ccm, and second, is it mis-matched to the carb body?

Can someone check what their known sizes are for each of these parts?

Webra just lists the carb numbers, no real size reference to them and it's bugging the heck out of me until I know for sure these throat sizes are right for this engine.

RE: Why not a Webra engines thread?
 

I just checked the barrels on my 6.5ccm Blackhead, 10ccm Blackhead and Speed .61. All three carbs seem to use the same body. The 40's barrel measures 6.5mm, the 10ccm measures about 6.95 - 6.97mm and the Speed's measures 8mm.

It looks like Webra used the same carb body with different barrels for different engines. That's why the opening in the body is larger than your barrel. The 8mm barrel on my Speed .61 is the same size as the body.

David

RE: Why not a Webra engines thread?
 

JP...I have noticed that sort of mis-match on other engines carbs from that era...O.S. comes to mind first. (I'm thinking of the air bleed carbs w/ Brass barrels of the .20, .25. .35, .40 )