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Oct 01, 2011, 09:42 PM
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Rarely seen Wiley 40 - note the minimal amount of cooling fins, although Schnuerle ported engines tend to run cooler than an equivalent loop scavenged one.
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Oct 01, 2011, 11:17 PM
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earlwb's Avatar
Quote:
Originally Posted by Twin-Stack
Rarely seen Wiley 40 - note the minimal amount of cooling fins, although Schnuerle ported engines tend to run cooler than an equivalent loop scavenged one.
I think they had designed the Wiley .40 engine for the control line 4-2-4 break mode of operation. So it tends to run on the rich side a little with short full power bursts when you do the stunts. Also I doubt they expected you to run it in a cowled speed plane as well. So it probably ran quite well like that with little in the way of cooling fins.
Oct 01, 2011, 11:19 PM
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Still on the nautical theme, take a look at the unusual method of water cooling on this Taifun Bison Marine. Hillbillies who brew their own firewater will be familiar with this apparatus.
http://www.kleinstdiesel.de/Collekti...on_marine.html

The nice twin stack OS 29 is there to remind Mr. Wiz to keep his mind on the subject !
Oct 01, 2011, 11:33 PM
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Quote:
Originally Posted by Twin-Stack
Rarely seen Wiley 40 - note the minimal amount of cooling fins, although Schnuerle ported engines tend to run cooler than an equivalent loop scavenged one.
At the very opposite end of the cooling fin scale, is this ETA 15 Diesel. Can you count 'em without using a pencil or cursor ?
Oct 01, 2011, 11:46 PM
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Not more car stories, I hear you cry ! Well this guy is actually a little known Aussie maker of model engines, the JW. The single cylinder JW 60 was unique in employing beam mounts with rubber bushings. BOB

http://members.optusnet.com.au/~pwst...y/jmwstory.htm
Last edited by Twin-Stack; Oct 02, 2011 at 01:06 AM.
Oct 02, 2011, 12:27 AM
Registered User
Just out of curiosity. Some years ago, Model Aviation had this article on soft mounting larger engines that involved sandwiching a heavy rubber diaphrgm between two slices of ply with the centers cut out. The centers were centered in the cutouts (The kerf had to be wide enough that there was no contact with the bulkheads) and the centers had to be large enough to clear the outsides of the engine mounts. Has anybody tried this? Been thinking of trying it on a project for either a Fox .60 or .78.
The rubber material I have available is cut from truck air brake diaphragms.
Oct 02, 2011, 11:17 AM
Bill Mohrbacher, MECA Fox Guy
G WILLIE's Avatar
typical heli stunt - if this wasn't photoshopped it is another example of heli kids showing off - like the one in Florida who buzzed a poor girl and whn there was a malfunction of sorts cut her up very badly
Oct 02, 2011, 05:13 PM
kill your idols
ZEROSKIN76's Avatar
Quote:
Originally Posted by Twin-Stack


and now for something completely different
Oct 02, 2011, 06:40 PM
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Don't see a lot of these 19's around -
Oct 02, 2011, 07:21 PM
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More Allyn stuff -
Oct 02, 2011, 08:17 PM
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A definite rarity - Japanese Mamiya 049
Oct 02, 2011, 08:19 PM
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I remember having one of those Cub .19s in high school. It was a bear for me to start. MAde my ears ring worse than any other engine I had. Ran well in CL, as long as I didn't try loops or wingovers. Didn't seem to want to suck fuel with sudden nose up controls. Did take a lot of flipping to start, but once started, pulled a lot better than either McCoy .19 I had. Gave me a lot of sore, bloody fingers.
Had two of them over the years, both are now at the local landfill. The local counties are too densly populated to continue flying without mufflers, and I just couldn't see any way to mount one.
Oct 02, 2011, 09:55 PM
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earlwb's Avatar
You can always find a clamp on muffler that will fit the engines.
I fitted a Davis Diesel Soundmaster muffler onto my old Fox Blue Head .60 engine. it took minimal effort. I have a little Fox .15 muffler on my Drone .29 RC conversion engine too. I modified it to be a clamp on as well.

Now then putting a muffler on the angled swept back exhaust outlets on engines like the O&R engines is a challenge though.


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