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RE: Why not a Webra engines thread? - 10/5/2011 11:31 PM   
jetpack



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Status: offline 		Hi Sport, yeah I kinda hoped it wasn't but when I scrubbed past the castor with a swab through the back of the motor, the outside race is bubbled from rust. The aluminum that is around it also is stained past the surface so these bearings are no good unless after I get them out and give the rear bearing a decent cleaning will I be able to tell...but I already know the answer there I think.

I had a gallon ziploc to use tonight to remove the e-clip. Now the wrist pin wont budge out of the piston. Nice. I need a longer screw to try again. I just used a head screw which reached but only a couple threads and I started loosing the head to grip it into the crankcase. I hope I don't need a slide hammer.

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RE: Why not a Webra engines thread? - 10/5/2011 11:41 PM   
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Status: offline 		You need some heat to loosen the goop on the pin and expand the piston from the steel pin. You'll get it out. I've been thru it with webras more than once.

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RE: Why not a Webra engines thread? - 10/5/2011 11:51 PM   
jetpack



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Status: offline 		I might try that approach after I find my lucky screw for the pin. What's scarey though is the motor is reletivley clean inside now and wasn't bad to start out. I think this engine has only one if not just a few start ups in its life and then put up without care. I am thinking it's either a burr left inside the hole from me pulling the clip on it. I tried to collapse it the best I could before I had to twist it to get it to unseat worried me. I figure this is the problem now. The wire diameter and the tension on that clip is enormous. This motor is actually past being comfortable for size on my motor board that I keep.



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RE: Why not a Webra engines thread? - 10/6/2011 12:21 AM   
jetpack



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Status: offline 		I have a question.

As long as I am stripping the block, I plan on making bolt-on headers for my Webra marine collection because they will be used.

My question concerns what standard size I should shoot for when I put threads into the block? Also what size header tube diameter should I be using with this. I have never even looked at 15cc motors before this one. Is there a standard header that can be used?

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RE: Why not a Webra engines thread? - 10/6/2011 1:15 AM   
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Status: offline 		On mine I left the cylinder partially installed to help stabilize the piston while trying to pull the pin. I rotated the cylinder and razed it so the pin was accessible through the large intake port. Like you I used the right size lucky screw to worry the pin out. But I also used some heat. I did not want to tap threads into the pin but would have if needed.
If I were to thread the block I would use a 5-44. But I used a strap on.

Denis

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RE: Why not a Webra engines thread? - 10/6/2011 2:07 AM   
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quote:

ORIGINAL: jetpack

I have a question.

As long as I am stripping the block, I plan on making bolt-on headers for my Webra marine collection because they will be used.

My question concerns what standard size I should shoot for when I put threads into the block? Also what size header tube diameter should I be using with this. I have never even looked at 15cc motors before this one. Is there a standard header that can be used?



What size are the cylinder head bolts? Use the same size. I'm guessing they are 3MM. If you have to, you could go up to a 4MM. Depends what size/how heavy the head pipe/muffler you are going to hang on it. I'm sure you know this already, but, purchase your head pipe first to use as a template. Don't ask me how I know this.....

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RE: Why not a Webra engines thread? - 10/10/2011 12:22 PM   
jetpack



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Status: offline 		Keeping the cylinder installed is an excellent tip. I'll try and slip it back over the ring before I try the pin. I have the screw now so maybe tonight I'll try to heat and remove the pin so I can get my bench cleaned up...LOL.

Going the same size as the head bolts will work for the header screws and make sense to me! Just wasn't sure.

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RE: Why not a Webra engines thread? - 10/18/2011 9:52 PM   
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Status: offline 		JetPack, how are you progressing? Did you get the pin out?

Just picked up a nearly new (very low time) speed .40 with a factory strap on muffler. Will report back once I spin it up.

Can anyone advise whether Webra engines will re-appear at some point? Or, whether anyone has the factory's spares inventory?


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RE: Why not a Webra engines thread? - 10/19/2011 12:14 AM   
jetpack



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Status: offline 		Hi Fiery, No I haven't been able to get to my motor but I do have the screw I need now and it's sitting with it. This weekend when I use the oven I'll have the motor ready for dessert. I wish I knew where all the Webra parts are also. Someone must have them I hope and not all sold with the building...

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RE: Why not a Webra engines thread? - 10/19/2011 12:22 AM   
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Status: offline 		Don't know about the others, but I have a NIB Webra Speed .61 "Champion" with the Webra fuel pump mounted in the backplate.

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RE: Why not a Webra engines thread? - 10/19/2011 1:53 AM   
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ORIGINAL: ChiefK

Don't know about the others, but I have a NIB Webra Speed .61 ''Champion'' with the Webra fuel pump mounted in the backplate.

ChiefK


OH, OH, OH I'd give my left testicle for that..... maybe even my right too..

I've hit a brick wall with my Speed 61 rebuild. I can get the sleeve repaired here ( F2cpitman@mycbsi.com ) and a new ring from Frank Bowman. Upon closer inspection, the big end of the rod looked very loose. Got out the dial indicator and measured .005+ clearance That is way to much, even for a big block Chevy. So it looks like I have a paper weight . I really liked the engine too. Always ran clean. Ran even crisper after I put a Super Tiger carb on it. It survived a helicopter and five airplanes and I bought it used!! I guess I'll be forced to buy another 90 4C

Ken

PS. Thank you to those who provided links to chase down parts for this thing.

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RE: Why not a Webra engines thread? - 10/19/2011 3:10 AM   
fiery


 

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Status: offline 		Ken, you could always make (or get made) a new conrod for it ...

Chief ... that .61 is sooo sweet.

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RE: Why not a Webra engines thread? - 10/19/2011 3:19 AM   
Hobbsy



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Status: offline 		Jet, contact this gent in Fargo ND he may have some of what you need.

www.paulsmodelsupply.com

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RE: Why not a Webra engines thread? - 10/20/2011 12:15 AM   
jetpack



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Status: offline 		Thanks Hobbsy, I've called Paul before great guy. I was wondering along with others where all the standing inventory went when Webra closed its doors. There has to be a good supply of pistons and liners somewhere (im hopefull).

I got the pin out tonight. Warmed up the motor ten minutes in a 300deg F preheated oven. I had to bottom out the screw inside the threads they provided inside the wrist pin and continued to turn it to break it loose. Before I did this I double checked how far the screw was going in. I thought I might be up against the other retainer but nope, so I went for it. I took the good advice about supporting the piston with the sleeve before trying to do this.

I will now have to bring the lucky screw/wrist pin combination to work tomorrow for my plastic jaws and machinist vise to back out the screw.

It took medium pressure on the wrench but it started and I spun it and twisted it out. On retrospect, a little shot of oil should have been put on too. I might have marked the pin. Time to clean parts!

I'll try the bearings later on. I'll refridgerate the motor overnight and use 300 degrees again and see what happens.

I am glad I took this engine apart to clean it instead of trying to run it with it like it was inside. That would have not been good I dont think.

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RE: Why not a Webra engines thread? - 10/20/2011 12:28 AM   
CustomPC


 

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Status: offline 		You can still buy Webra spares from http://www.ercmarket.com

Unfortunately they are in Europe so prices and postage aren't cheap. But if you really need the parts what else can you do?

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RE: Why not a Webra engines thread? - 10/23/2011 10:23 AM   
fiery


 

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Status: offline 		Put an old Mk I Speed .40 dykes ring through it's paces today. It was a buy off the German BayEE site. It has the original "Strap On" silencer retained by a very stout worm drive clip. It has the orginal glow plug and carb installed.

Fuel 25% oil (50:50 castor/synth) 75% Methanol. Weather a balmy 25 degrees Centigrade. Prop utilised is a wide blade Taipan orange 10 x 6.

Setting up the carb was a little more of a challenge than modern twin needle carbs. The calibration of low to high speed fuel metering is not up to modern standards. Still, transition was adequate and instantaneous even with nil nitro fuel. Good transition was achieved after some trial and error setting up the carb. Main needle had to be seven turns out! The threads on the needles are very fine.

I do not believe the engine had ever been run for more then a few seconds or maybe minutes by it's original owner. The piston and liner were pristine.

These engines make good power even today. They have the feel of quality and run well on nil nitro fuel. Mine idled reliably at 2,500 rpm and wound out to a steady 12,800 rpm. Not earth shattering figures, but remember, this is a .40, and my fuel was a high oil, nil nitro running in blend.

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RE: Why not a Webra engines thread? - 10/23/2011 1:46 PM   
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quote:

ORIGINAL: CustomPC

You can still buy Webra spares from http://www.ercmarket.com

Unfortunately they are in Europe so prices and postage aren't cheap. But if you really need the parts what else can you do?


Anyone needing parts for a Webra in the states may want to give Phil's Hobby Shop in Ft. Wayne Indiana a call. I was speaking with his son-in-law yesterday, and he said Phil has just about anything you can think of when it comes to this hobby and over 30 something years of being in business...

I bought a Webra 40 engine from him back in the late 80's and I currently have it in a GP Escapade, what a great combo! I remember though, he had a lot of spare parts for those engines and he still might have some left, might be worth a call anyway...
http://www.philshobbyshop.com/catalog/contact

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RE: Why not a Webra engines thread? - 10/23/2011 2:18 PM   
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Status: offline 		well, anything man has made can be remade. So if the rod is too loose or worn, you can have it re-bushed or bushed and reamed back into spec. You can also make a new rod too. But check the wrist pin, as it might be worn and not the rod per se. The other thought is to make a slightly different size wrist pin to match the rod too.


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RE: Why not a Webra engines thread? - 10/27/2011 1:06 PM   
jetpack



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Status: offline 		I'm still knocking around with the Webra .91 restoration.

I made a nut driver that will fit between the needle springs without having to bend the springs out of the way to fit a wrench.

The center is drilled out to accept the main needle threads and the hex cup is shortened. I used a roll pin for the T handle.

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RE: Why not a Webra engines thread? - 10/27/2011 1:20 PM   
Mr Cox



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Status: online 		Did you run the 1.5cc, yet?
I'm just a little curious to hear what kind of performance others are getting from that engine.

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RE: Why not a Webra engines thread? - 10/28/2011 12:54 AM   
jetpack



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Status: offline 		No sorry I haven't. It's stored now awaiting an airboat kit that I have for it. I'm still getting my motors and hardware arranged and ready for each boat I plan on building and I'm close to being there now. Next is converting a room into a small woodshop to build the hulls.

The bearings I ordered for the 91 marine came today. Both are all stainless. I'm still amazed at the size of the rear bearing being 17 x 35 thats big. It looks like it doesn't belong in a model engine of any kind.

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RE: Why not a Webra engines thread? - 10/28/2011 4:03 AM   
kenh3497



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well, anything man has made can be remade. So if the rod is too loose or worn, you can have it re-bushed or bushed and reamed back into spec. You can also make a new rod too. But check the wrist pin, as it might be worn and not the rod per se. The other thought is to make a slightly different size wrist pin to match the rod too.




I took a look at he crank pin and measured it with my calipers. Not the most accurate but the pin appears to be round and not tapered. I was expecting to find some out-of-roundness in the crank pin. A new bushing certainly could be made but is it worth the trouble??? I have a small lathe and could do it but a new ring and having the sleeve hard chromed would put me at almost 2/3 cost of a new ST 60 with the same if not more power than the Webra 61. AND, the Webra needs new bearings so now the cost is very close to a new engine. I'm not sure what to do???

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RE: Why not a Webra engines thread? - 2/20/2012 2:56 PM   
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Status: offline 		Hey Webra Gurus,

Does anybody have any experience with the combination Cline fuel regulator and Dynamix carb?\

Many thanks for any info!


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RE: Why not a Webra engines thread? - 2/20/2012 4:11 PM   
jetpack



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Status: offline 		Fuel pumps are something I've had to look into and decided to go with what Webra themselves used to use, the Perry pump. They used to build them into their back plates and came with a seperate one-way valve that it works with.

I think I read about the Cline regulator at the same time I looked into Perry sytems and the only thing that affected that is the price. Clines are expensive.

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RE: Why not a Webra engines thread? - 4/4/2012 10:55 AM   
pe reivers



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Status: offline 		I stumbled upon this thread when searching for data on a Webra engine I have in my posession. It turned out to be a C/L series 1 Webra 5ccm named BigBen5, produced between 1959 and 1963(series 2). I have no idea when they stopped producing the series 1 in favour of series 2.
It is cross scavenged. The piston slopes up in a straight line from exhaust port to the scavenging ports, where it is cut down again to provide the cross flow baffle.
It seems the engine was plagued by heat problems for RC operation, and production was then discontinued.



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