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My Non Cox Engines

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My Non Cox Engines

Post  FlipStart on Sat Sep 15, 2018 9:34 pm

Here is a Norvel .061 (I think) it has 1.0 stamped on the other side (metric stuff ya no) so I guess 1.0cc swept piston displacement. Don't know if this is the "Big Mig".



Here is a Torpedo .09 I have had for way, way long time. As can be seen I did my Comet cleanser and toothbrush finish on the cylinder head. An extra cylinder & piston. I don't remember what happened to the original back plate but I salvaged the part that takes up crank case volume and made a new back & gasket and drilled a hole in the middle, ground down a screw head and put it together. I recognize that nice flange nut on the back, it's an axle nut for a Cox Slot Car (at least I'm pretty sure). I think I have several with my slot car stuff.



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Re: My Non Cox Engines

Post  Ken Cook on Sun Sep 16, 2018 3:03 am

To determine Big Mig cylinder vs AME, remove the glow head and count the ports inside the cylinder. A Big Mig has 5 small ports internally. The AME has 3 large ports. The wrist pins are staked on Norvel engines. From normal the staking can be compromised from wear, on the AME engine this can be the death of it. The wrist pin can slide out and get jammed into the port. The port I'm referring to is the very front of the engine and on landing I had many where the pin slid out just due to inertia going forward and locked up the engine. It didn't happen during running. Many of us using them for 1/2A combat have experienced this. Were also running them more than likely beyond their rated performance. The Big Mig isn't a issue as none of the ports line up with the wrist pin.
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Re: My Non Cox Engines

Post  Ken Cook on Sun Sep 16, 2018 3:08 am

To determine Big Mig cylinder vs AME, remove the glow head and count the ports inside the cylinder. A Big Mig has 5 small ports internally. The AME has 3 large ports. The wrist pins are staked on Norvel engines. Sometimes the staking due to material bulging out can wear, the staking can be compromised , on the AME engine this can be the death of it. The wrist pin can slide out and get jammed into the port. The port I'm referring to is the very front of the engine and on landing I had many where the pin slid out just due to inertia going forward and locked up the engine. It didn't happen during running. Many of us using them for 1/2A combat have experienced this. Were also running them more than likely beyond their rated performance. The Big Mig isn't a issue as none of the ports line up with the wrist pin.
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Re: My Non Cox Engines

Post  FlipStart on Sun Sep 16, 2018 8:41 pm

Thanks for the information Ken. Greatly appreciated Very Happy
I was able to use a bright little flashlight and see the 5 ports through the exhaust port. So I guess I don't half to worry about the wrist pin falling into a port. I've never run this engine. I met a guy at one of the flying fields and somehow we got to talking about slope soaring planes and he had a kit in his garage he was selling, Hobby Shack Super Ridge Runt.
I love the look of T-Tails so I bought the kit. He also had the little Norvel and a K&B Sportster .45 R/C new in box. So I bought the engines too. The K&B is the AAC (not sure I got that right) design where I believe it has an chrome plated aluminum piston & an aluminum cylinder. I'm curious how that setup worked out, never remember hearing much about them.

Jeff
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Re: My Non Cox Engines

Post  GallopingGhostler on Sun Sep 16, 2018 9:08 pm

FlipStart wrote:I love the look of T-Tails so I bought the kit. He also had the little Norvel and a K&B Sportster .45 R/C new in box. So I bought the engines too. The K&B is the AAC (not sure I got that right) design where I believe it has an chrome plated aluminum piston & an aluminum cylinder. I'm curious how that setup worked out, never remember hearing much about them.
You are correct on the Sportsters, Jeff. My information is from others like Dennis Lipsett, who spoke well of the engines and gave tips on how to best run them.

Set up worked well if one used the legacy fuel formulas, not the modern low Castor under 20% oil fuels. The engines have been referred to as the poor man's 4 cycle engine, because they can spin larger diameter props with ease.

If engine is run lean can ruin the chrome plating on the piston. The engine gained a bad rap because modelers didn't know how to treat them.

I haven't put one in an aircraft yet, but been bench running on standard fuel (25% oil with 10% as Castor by adding 12 -16 oz. Castor to gallon of RC fuel). My .20 runs fine on that. Eventually, I've been wanting to mount that .20 on a .35 sized CL aircraft.
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Re: My Non Cox Engines

Post  Ken Cook on Mon Sep 17, 2018 3:40 am

Jeff, something else is throwing a flag on the Norvel. I don't use Norvel glow plugs other than breaking in the engine. They offered two different styles and one of them ( Early version ) was known as the Freedom plug. It was a good plug but it took a little more voltage to get it glowing. I think that might be what you have on that engine. I certainly could be incorrect or have my thought process reversed where the one on your engine is the newer.

The Torp .09 is a neat little engine. They like to catch fire with regular frequency so be aware of that especially if mounted profile. It can blow hot flaming fuel in your face. That's what makes it so fun.
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Re: My Non Cox Engines

Post  FlipStart on Wed Sep 19, 2018 3:45 pm

Thanks for the information about the Sportster GG. Thumbs Up
Poor mans 4 stroke, that's cool. Maybe i'll start with the max prop size the manual recommends.

I'll be sure and run it with some castor in the mix. I'm going to check out Viper Hobbies. When I visited their new location they seemed to still have a fairly good supply of fuel. I might be able to get some smaller quantities like quart cans/bottles in the car department. Maybe car fuels run higher castor also.

The engine is new but I'll half to at least flush it out a bit before running it. definitely going to need a clean-up.

Jeff
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Re: My Non Cox Engines

Post  FlipStart on Wed Sep 19, 2018 4:14 pm

Ken Cook wrote:          Jeff, something else is throwing a flag on the Norvel. I don't use Norvel glow plugs other than breaking in the engine. They offered two different styles and one of them ( Early version ) was known as the Freedom plug. It was a good plug but it took a little more voltage to get it glowing.

         The Torp .09 is a neat little engine. They like  to catch fire with regular frequency so be aware of that especially if mounted profile. It can blow hot flaming fuel in your face. That's what makes it so fun.

Thanks Ken Thumbs Up
Is the plug removable in the Norvel? Initially it looked like a regular glow plug. Now I see it has no means of of extraction with a 6 point socket.

The .09 sounds like it's going to be lots of fun. affraid
Maybe I can use it to heat the garage in the winter. Warm

Jeff
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Re: My Non Cox Engines

Post  Surfer_kris on Thu Sep 20, 2018 3:50 am

The glow plug is a head-insert with clamp ring. The early ones were a bit too cold and are easily recognisable by the flat top of the top electrode. Yours looks like the later hotter plugs (rond end of the center electrode) and these are fine. The threads of the head clamp is the same as on Cox .049 engines, so all those offerings (Nelson etc) will fit these engines too.
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Re: My Non Cox Engines

Post  FlipStart on Thu Sep 20, 2018 12:32 pm

Surfer_kris wrote:The glow plug is a head-insert with clamp ring. The early ones were a bit too cold and are easily recognisable by the flat top of the top electrode. Yours looks like the later hotter plugs (rond end of the center electrode) and these are fine. The threads of the head clamp is the same as on Cox .049 engines, so all those offerings (Nelson etc) will fit these engines too.

Thanks Kris, Thumbs Up

I will take a look for a clamp ring.
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Re: My Non Cox Engines

Post  ticomareado on Fri Sep 21, 2018 6:25 pm

That Torp .09 needs a green paint job on the head.
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Re: My Non Cox Engines

Post  FlipStart on Sat Sep 22, 2018 10:56 am

ticomareado wrote:That Torp .09 needs a green paint job on the head.

I think I could probably find a little John Deere in a can here somewhere.
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Re: My Non Cox Engines

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