Vintage Fox .15 slant plug
05-12-2007, 05:21 PM
#1
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Vintage Fox .15 slant plug
Does anyone know when the slant plug Fox .15's were made? I have one that has not been run in a LONG time, and thought one of the vintage CL guys might like it on a vintage bird.
05-14-2007, 12:20 AM
#3
RE: Vintage Fox .15 slant plug
Another big difference in the early cross-flow Fox 15s was from steel finned cylinder to drop-in slick cylinder/finned casting.
Cross-flow Fox 15s were made for well over 20 years, occasionally in parallel with the much stronger Schneurle version which appeared in the early 1970's. The cross-flow engines were not particularly powerful, though quite good as sport engines for the time they first appeared, given the right prop and generous nitro in the fuel. There was considerable variation in factory QC over those years, and some of them were a delight to use; others didn't seem much interested in starting, ever. RCers didn't much care for the Fox butterfly type throttles, but that's nothing new, is it?
The aluminum finned Fox 15, along with the contemporary black, steel finned OS Max 15, were about as light as a useful 15 engine could get - just a bit over 3.5 oz. The OS had a power edge over the Fox, though. A good Fox cross-flow 15 could be a lot of fun even today, in the right model and operated appropriately.
Cross-flow Fox 15s were made for well over 20 years, occasionally in parallel with the much stronger Schneurle version which appeared in the early 1970's. The cross-flow engines were not particularly powerful, though quite good as sport engines for the time they first appeared, given the right prop and generous nitro in the fuel. There was considerable variation in factory QC over those years, and some of them were a delight to use; others didn't seem much interested in starting, ever. RCers didn't much care for the Fox butterfly type throttles, but that's nothing new, is it?
The aluminum finned Fox 15, along with the contemporary black, steel finned OS Max 15, were about as light as a useful 15 engine could get - just a bit over 3.5 oz. The OS had a power edge over the Fox, though. A good Fox cross-flow 15 could be a lot of fun even today, in the right model and operated appropriately.
05-14-2007, 06:12 AM
#4
RE: Vintage Fox .15 slant plug
Lou, you mentioned the two engines that were used to start quarter-Midget racing around 1964 when Chuck Cunningham suggested the class in RCM.
Both the Fox and OS .15 engines were light, powerful and very compact, allowing them to be hidden in the cowl of the models.
As you said, these engines can still be used today for sport flying.
Both the Fox and OS .15 engines were light, powerful and very compact, allowing them to be hidden in the cowl of the models.
As you said, these engines can still be used today for sport flying.
