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Nice Twin cyl engine...West Germany. 50cc

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Nice Twin cyl engine...West Germany. 50cc

Old 08-06-2011, 03:33 AM
  #26  
PlaneKrazee
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Default RE: Nice Twin cyl engine...West Germany. 50cc

I had several Ross twins, cast in front bearing housings, bolt on housings, Perry carbs, Kavan carbs, black anodized, grey. with mounts and exhausts, They used a lot of fuel and could only turn a 11-7 or 12-6 prop. If I recall the max rpm was under 11,500.
Old 08-06-2011, 06:11 PM
  #27  
captinjohn
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Default RE: Nice Twin cyl engine...West Germany. 50cc

PlaneKrazee, I just got back from a engine show in Scottville Mich. I took a 70 year old Continental twin Army engine, a model Hit & Miss associated engine and the Kavan 50cc RC engine. A guy took a video of the Kavan 50 and is going to place it on YouTube. I have no idea how it came out yet. Anyway I had a lot of fun meeting new people there and got to see several types of Old engines and tractors. Some restored to better than new looks!!!! Hope to fly tomorrow if I get time towards eve. Take Care Capt,n
Old 08-09-2011, 06:37 AM
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Default RE: Nice Twin cyl engine...West Germany. 50cc

Here is a short video of my Kavan 50cc engine running on ignition. The fuel was glow fuel (too much oil) and I have since ran it on no Nitro low oil content alcohol. It will run on a pump gas mixture, but I prefer to run alky...that has a cooling effect over gas. It has been a lot of fun. I want to thank Jim M for doing the video with his nice camera. Best Regards Capt,n

http://www.youtube.com/watch?v=BtzwiFamFuw
Old 08-09-2011, 10:00 AM
  #29  
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Default RE: Nice Twin cyl engine...West Germany. 50cc

Looks like you guys had fun. I like going to those events when possible.
Old 08-10-2011, 04:19 PM
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Default RE: Nice Twin cyl engine...West Germany. 50cc

I did some reading on the Gales Ferry area. That sure does seem like a historical area to live in. I bet it would be a nice place to visit if you was not ever there before. I like new places. Take Care....Capt,n
Old 08-12-2011, 04:30 PM
  #31  
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Default RE: Nice Twin cyl engine...West Germany. 50cc

UPDATE.. I changed the oil in the Kavan and advanced the timing. Did a re-tune and she is running even better. I also added a catch tank to the crankcase vent line. This Kavan 50cc Twinwith a Rcexl ignition is looking better all the time. When the oil is changed...there is more that comes out of the crankcase than you put in. It bi-passes the pistons and collects in the pan!
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Old 08-13-2011, 05:04 AM
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Default RE: Nice Twin cyl engine...West Germany. 50cc

More Tinkering !!!
On my Kavan 50 there is a nipple for a crankcase vent line. I placed a "oil catch" tank to a fuel line that is hooked to the vent. I hope there will be enough pluse to carb if I place a Tee in that line to catch tank. The Tee would be close too nipple and the catch tank 6-7 inches at end of the line/tube. The catch tank has a vent so pressure will not build up. I hope this works...got to make a carb adapter and pick out a good Walbro carb. Best Regards Capt,n
Old 09-01-2011, 07:49 AM
  #33  
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Default RE: Nice Twin cyl engine...West Germany. 50cc

A UP-DATE:

I have run the Kavan more than ever. Took it too a couple more engine shows also. It will start with one flip 95% of the time! This just amazes people plus how slow it will run. I called another Kavan 50 owner and he also says his will idle down to 500 RPM. To see & hearthis is ....well "neat". I can see it going into a J3 Cub or a Flybaby. Capt,n
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Old 02-06-2013, 01:48 AM
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Default RE: Nice Twin cyl engine...West Germany. 50cc

I ran across this thread while searching for something else. Cap'n, we talked about my FK-50 a while back. I got to tinkering with it, pulled the gear cover to see if it had the upgrade. It doesn't, but I was amazed when I opened it up. It was all sludged up! I degunked it, so it should be ok.  
Previous owner must have run normal RC fuel, which contains way too much oil. As you're aware, it only requires 2% oil in the fuel since the oil pump is the primary lube source. I plan on having Mecoa upgrade the gear. No machining involved (where does he get that?), just a shim or two. 
I don't know where PK gets such inaccurate info. The pump obviously works, being driven from an eccentric on the camshaft. Many full-scale design elements are incorporated in the engine; oil pump, dipstick, cam-ground pistons, oil rings, nitrided barrels, etc. It's a scale reproduction of the early Continental twins which produced 32-40 HP. 
Anyone interested should look up Clarence Lee's RCM review. He thought it would be better termed a 'miniature aircraft engine'. It has the same performances as a Quadra 50 2-stroke, and is much stronger with ignition. One sold at Christie's not long ago for nearly $1,700. I don't recall ever seeing an Enya at Christie's. 
These are true works of industrial art and, since art is meant to be displayed and appreciated, I plan to put mine in a 1/3-scale Cub and occasionally fly it. They are very reliable and last a long time with proper care. 
Old 03-15-2015, 05:14 AM
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Hope to test my Kavan 50 next weekend I recived it used but was told it runs good.
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Old 03-15-2015, 05:37 PM
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Post a photo or so of your Kavan 50 & let us know ho it runs. Sure like mine ! Capt,n
Old 03-21-2015, 08:00 AM
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Here is my twin
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Old 04-16-2016, 06:49 PM
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The oil stays clear.....very good thing !
Old 04-16-2016, 06:56 PM
  #39  
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Originally Posted by eddieC View Post
I ran across this thread while searching for something else. Cap'n, we talked about my FK-50 a while back. I got to tinkering with it, pulled the gear cover to see if it had the upgrade. It doesn't, but I was amazed when I opened it up. It was all sludged up! I degunked it, so it should be ok. *
Previous owner must have run normal RC fuel, which contains way too much oil. As you're aware, it only requires 2% oil in the fuel since the oil pump is the primary lube source.*I plan on having Mecoa upgrade the gear. No machining involved (where does he get that?), just a shim or two.*
I don't know where PK gets such inaccurate info. The pump obviously works, being driven from an eccentric on the camshaft. Many full-scale design elements are incorporated in the engine; oil pump, dipstick, cam-ground pistons, oil rings, nitrided barrels, etc. It's a scale reproduction of the early Continental twins which produced 32-40 HP.*
Anyone interested should look up Clarence Lee's RCM review. He thought it would be better termed a 'miniature aircraft engine'. It has the same performances as a Quadra 50 2-stroke, and is much stronger with ignition. One sold at Christie's not long ago for nearly $1,700. I don't recall ever seeing an Enya at Christie's.*
These are true works of industrial art and, since art is meant to be displayed and appreciated, I plan to put mine in a 1/3-scale Cub and occasionally fly it. They are very reliable and last a long time with proper care.*
Eddie, I also plan to put my Kavan is a J3 cub.
Old 09-08-2016, 07:30 PM
  #40  
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SkyPilot101
That is a nice looking engine. I thought my hands would be doing much better by now, but they are not. The way it looks I will be selling things. I have a hard time figuring out just what right now. Seems like everything I have needs good working hands to do anything with it. So that is about it for now. Best Regards
Old 09-13-2016, 11:40 AM
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UPDATE I was to another hand specialist & have had to visits & got a test where they can see inside your hand. That allowed them to give me a shot in the hand of med & it seems to be helping. I hope it gets better...only a day 1/2 ago. So there is a lot more hope now. Best Regards John
Old 06-27-2019, 05:55 PM
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Originally Posted by captinjohn View Post
UPDATE I was to another hand specialist & have had to visits & got a test where they can see inside your hand. That allowed them to give me a shot in the hand of med & it seems to be helping. I hope it gets better...only a day 1/2 ago. So there is a lot more hope now. Best Regards John
Well it is now 6/27/2019 & my left hand works, but is quite numb...guess I will have too live with it. I still have a few engines.
Old 07-28-2019, 03:26 PM
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I need to get my Kavan running. Might send it to Mecoa for it's first start.

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