It sounds like the Fox 29 that I have on a Flite Streak.  I believe they were built in the 70's, but someone who is more knowledgeable can tell you for sure.  I run a 10-5 prop with 29% oil in the fuel.  Mine does a nice wet 2 stroke and pulls a Streak very well.

Larry,
Does it look like this?
DennisV

Larry,
Does it look like this?
DennisV

Dennis - It looks exactly like that. For some reason, the needle assy was mounted on the left side (facing front of motor), which would put it pointing down when mounted to the outside of a profile. I moved it to the other side cause I could see myself wiping it out on the first rough landing. Maybe someone had it mounted vertical .... but whichever way they had it, they didnt fly it much. This thing looks brand new inside/out.

I normally run about 12oz of castor p/gallon(10%/18), so I figure that should be good and I'll use a 9x6 and treat it as a breakin for abit. As suggested, a 10x5 would probably be good, but all I have are Zinger 10x6's and might be too much if it's not broke-in

Getting it mounted to a FS now .... we'll see how it goes in the AM. Crossing fingers ..... :-)

Thanks a bunch everybody!  FlySafe!  Larry (Larrys4227)

Heres a quick pic ..... alittle blurry. Oh well. :-)

FlySafe!  Larry (Larrys4227)

Probably have 10-12 flights on the Fox .29 now. After the first day, I had to rebuild the nose of the FS. The motor mounts loosened up and ready to fall out. The second day, with a new re-enforced nose, I tried some different props, and a 9x6 seems to be best. I tried a 10x5 and it really struggled. The FS is on the heavy side, and with the 9x6, 60' lines, wet 2-cycle needle setting .... I was getting about 5.5 second laps. My FS's have always liked 5 second, or a shade faster .... anything over that and the lines feel loose and it doesnt pull with any authority. My other FS with a OS25LA, 9x6 and 60' lines averages around 4.8 seconds.

Anyway, yesterday was the third day and I went to the field with 52' lines .... much better. Mentally counting off .... was around 5 second laps. Only got a couple flights in cause the wind got too much. Looking forward to more flights with this motor.  Seems to run good, but would probably do better on a lighter plane. Somebody mentioned a wet 2-cycle run and I'm trying to keep it there, but it seems its power really comes in toward the end of the tank as it leans out.... but its alittle hotter than I'd like.

Starting it has been a breeze ..... prime it, attach the glow,  hand flip it 2-3 times and it starts right up.

Overall .... not too shabby for a 30-40 year old motor.   

Fly Safe!  Larry (Larrys4227)

Personally, I never had any of the 29s, just the 36s, and it seems to me that it's not really likely a Streak weighing under 35 Ounces would've been too much for the ones that I had.  You may be setting up a run that is "too wet" of a two cycle run.  My own sport 36s would swing an 11-5 with authority (I have none of my own any longer, as all of the local Slow Combat variations, except "Fox 35 Super Slow" died, and I just didn't need them for anything else). 

I really need to weigh this FS sometime, but it was the first one I rebuilt .... adding the longer fuse. I overbuilt it and made it heavy. I've also been taking into consideration that this 29 is in 'new' condition. When I dug it out and got it freed up, it was absolutely spotless on the inside. The top of the piston had alittle burn mark, but the head button was clean as a whistle. There was abit of crap up inside the piston around the wristpin, but thats it.

I'm abit leary to lean it out. I used to race boats and I've burned up a ton of engines .... I'd like to not burn this one up.  I'm using 10%/27%Castor.  I'll give the engine a few more tanks and maybe go back and try the 10X5 prop again.

Your right about hard tarmac .... here in FL if we dont get rain for awhile, the ground turns to concrete. Just yesterday my other FS decided to die on the middle of an outside loop.  The plane came in on me and I couldnt run fast enough.  Some damage, but repairable ..... my right index finger got the worst of it. Somehow, while holding the handle, my finger got caught up in a line and sliced it pretty good. No idea how it happened ... LOL!

FlySafe!  Larry (Larrys4227)