1960's Fox .15 R/C Test Run
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- Опубликовано: 17 окт 2024
- March 11th, 2024
The Fox .15 R/C (throttled) gets a test run on the stand. According to my Dannels book, this version (rotating exhaust restrictor) came out in 1969, though the base engine goes back to 1962 or so.
After the to-be-expected de-gooping/flushing of the spray bar, the Fox actually fired up and ran quite well. Its idle was totally acceptable, though the tiny stop screw is missing, and it was easy to close the throttle all the way and kill the engine. The RPM's ranged from a rich running 11K+ top end, down to a high 4k idle.
I made a quick video of the run, including a close-up of the rotating exhaust restrictor, and some tach numbers. The tach runs are poorly lit because its an optical tach, so I had to turn off the shop lights and let it get some natural sunlight to work.
Really a nice little engine, but does need a good cleaning.
It's been a long time since I've seen an engine running with an exhaust baffle -- nice to hear and watch. BTW, I like that wrench holder on the side of your toolbox.
Thank you Andrew!
I've got some earlier O.S. engines up next. They have the "butterfly" valves that rotate in front of the exhaust to restrict its flow.
Thank you again for your comment.
Kim
Exelete trabajo! México city!
Thank You!
i have 2 of these that ive never ran but mine have a exhaust restrictor plate(???) that chokes down the opening where one would think the muffler would mount. Do u know anything about this engine? its identical to ur engine but with a different style exhaust choke? any info would greatly be appreciated
Many Fox and other brands of the 1960's and 70's used this type of rotating valve to restrict the engine's exhaust---I'm thinking to make muffler use a bit easier. Other engines used what we always called "butterfly" valves, which may be what you have.
My reference book shows the first throttle-equipped Fox .15 with a butterfly valve appeared in 1962. I THINK the .15's stayed this way 'till 1969 when mine was introduced with the rotary type restrictor.
I've got several O.S. brand engines with these butterfly valves that I intend to run (maybe today), and am looking forward toseeing what happens wit them.
Thank you for your comment,
Kim
@@Winter_Sportster tanks forr the info and this run vid, had u not posted this run vid i would not have dug out a not so scale p47 arf i bought 20 years took it outof the box ddnt like it put it back in the box with hopes maybe one day the not so scale appearance wouldnt bother me but shes perfect for one of my .15's. castor based fuel here i come, thanks again for the info, greatly appreciated and always wish happy landings
@@4thGloryMondayThank you for your comments, and good luck with that '47 !!!!
what number glow plug are you using?
From about 1970 or so, Pull the exhaust baffle and linkage, and let it sing. All those do is make it run too rich and kill the plug. It will thank you later. Once you pull the baffle and get a tight tune on it with a good plug, a short open stack muffler to save fuselage, with a shorter prop, you could fly Combat with it, to this day, , Not to mention R/C all day long. The Fox's were very underrated, to this day. That motor above would fly just fine, for hours on end, towing a BIG load.