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Post  Ken Cook Sun Sep 14, 2014 3:29 pm

George I never got into the tach thing until a few years back and since then I haven't run this engine. I just currently finished some foamies to fly a bunch of this stuff. I have enough cases and parts to complete several of these .15's. Props used for these were 7x4 Rev Ups. Making RPM claims on these are pretty much obsolete when you compare the current Russian F2D stuff. It blows these out of the water. If I was to use a prop I would certainly choose a old Taipan 7x4 or a woodie but I'm curious to see if the F2D glass props would work. I'm venturing to say that this particular engine will tach on the ground at 22-24k with the Nelson head button. My bench tests a few weeks ago were using 10% nitro and 22% oil. For the 3 engines I ran all set up for suction, they ran at 20K swinging a 7x4. My club uses a lot of FP .15's for combat. When we hit 20K on the FP .15 it had it's venturi removed and was running on 35% nitro. All in all I think these Fox's are certainly overlooked. These engines don't need to be overloaded with the syrup of 25% oil content. 20% oil content is fine on these engines. High nitro isn't out of the question here. I use a lot of high nitro fuel . Ken
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Post  GWILLIEFOX Sat Dec 27, 2014 12:09 am

Getting back to the beginning, you have a 1976 engine.  The last of the bypass 15s were made in 1985!

Fox 15 1975+ - Page 2 85-15r12

Tom Fluker won the FAI Combat event in 1982 with one of the special schnuerle 15s.  I'd post pictures, but I don't know how yet.Fox 15 1975+ - Page 2 83030710Fox 15 1975+ - Page 2 Stub_110Fox 15 1975+ - Page 2 15sch_10
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Post  Mark Boesen Sat Dec 27, 2014 4:43 am

Hi Bill,

Merry Christmas!

I see you finally made it, welcome to the forum/group/club! I'm sure everybody going to enjoy learning from your expertise!
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Post  Cribbs74 Sat Dec 27, 2014 5:53 am

I'ts nice to hear from a fellow Fox/Cox afficianado. Welcome to the forum!

Ron
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Post  GWILLIEFOX Sat Dec 27, 2014 1:27 pm

@Mark Boesen wrote:Hi Bill,

Merry Christmas!

I see you finally made it, welcome to the forum/group/club! I'm sure everybody going to enjoy learning from your expertise!
And Vica Versa
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Post  gcb Mon Dec 29, 2014 4:07 pm

@Mark Boesen wrote:I can't remember what it was (8x6?) whatever Fox recommended. I built the Ringmaster Jr. the summer going into 7th grade, I thought it flew great, later made drop off LG,

I believe Fox recommended using either an 8x4 or a 7x6. I used an 8x6 (standard .15 prop for me) and thought the Fox .15 was a dud until I tried the recommended size...then it livened up.

The first Fox .15X's had no muffler provisions (engine in the right). The next ones had the over/under mount (center) and finally they added ears (right). Fox made over/under mounted mufflers then came out with ones that had provisions for both.

I believe the RC version of the .15X ran parallel to the .15 Schnuerle's for awhile.

George  

Fox 15 1975+ - Page 2 Fox15x10

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