Sorry for the delay.... was on vacation
Actually, properly set up, the SJ-50 would work well in the P-7. Most people do not realize the torque this beast really has.
On the P-7 I would suggest propping the SJ-50 with a 11x5 prop. (do not get fixated on prop size, some people put to much into this). Will let the engine turn up, you will get all the pull you want. Once familiar with the setup, you can try an 11x6. Master airscrew simitar, Vess, APC are good choices to work with.
You want a prop selection that lets the engine turn at least 15,000 ground peak rpm. You can back off rich down to around 14,500 or even 14,000. Just do not get it lean. Find peak, back off at least 600-800 rpm and fly it.
The SJ-60L is only now available in the standard version. SJ-60LX was replaced with the SJ-56LX. You want a standard 60L if you go that route. Very happy turning the 11x5 or 11x6 props.
My first suggestion..
Put your existing SJ-50 on the test stand. Run it with 11x5 ... become familiar with it, get a baseline rpm. Understand how it needles.
Bob
ORIGINAL: nhblacksmith
I want to learn pattern flying and just purchased a Hangar 9 Phoenix 7 ARF. I don't intend to compete (at this point) but want to be able to fly the classic pattern maneuvers. Since I already own a new SJ50 and two used ones I would like to use one of these engines in the plane but I'm not sure if they are adequate or can be propped correctly. I'm a newbie at this so I would like an experienced opinion on any deficiencies in flight performance with this combo. My thoughts were that if the SJ50 doesn't work, I could later upgrade to an SJ60L without having to modify the cutouts in the fiberglass fuse. I will be using the Jett tuned muffler, not a pipe. Thanks for any help.
Neal in NH