Vince, you're in for a treat because it really is a great-flying model. But when the muffler breaks off after about 20 flights, you'll want to get one of [link=http://www.pspec.com/details.asp?ProdID=51&category=4]these[/link], model # 4SE51, with the 30-deg elbow. Not nearly as quiet as the YS, but a lot more durable.

Troy's nose ring set-up that is grafted into the cowl is also a good idea, however I can't speak to its durability yet as I've got only about 15 flights after that modification. I know that particular Hyde mount is touted as not requiring a nose ring, but the general consensus is that it does. Does funky things to the thrust line without it.

Bob - Thanks for the suggestion, and I may get what you advised asap, take a look in a minute. I purchased the Hatori Pipe, for tunnel, etc., then decided not to do it. They made that mod also. I talked to the guy's at Piedmont, they suggested the NR, with the Hyde mount. I saw a nose ring set up on I think, "Ed's Pattern Page", from SPA site. I did that, not exact, but close. I have taken some ribbing about it, but running with the cowl off, spool up, it seems to work, and a little bracing on the side's may be in order. Picture enclosed. I was concerned about the NR connected to the cowl, maybe too much flex at the cowl front?

Keep you posted on initial flight's, etc.

Vince

Now that truly is a nose ring Vince. Wow, good work. I will use an OS120AX on my FS if and when I get one. I don't think the 2 cycle engines, (and that 120AX is a very smooth one), need soft mounts or nose rings, at least I have never seen those things on any engines except 4 cycle ones. Would any of you guys use a Hyde mount and the nose ring if you were using an OS120AX??

Now THAT is a nose ring![8D]

Yes, I am very dubious about the cowl-mounted ring and how long it will be before engine vibrations shred the cowl. Likely I will end up with something like yours, using CF tubes and 1/8" 5-ply beech.

Same thoughts here concerning the Hatori... considering the weight/complexity/cost/necessity... just ain't there.

Couple more picture's. Ply cut for fit, then glassed with 2 oz. cloth. CF tube's, sink 440 female's in firewall, aluminum 632 females on front of tube's, then aluminum males to fit from outer NR. Picture also, side mounted glow lighter, sullivan has the best I can find. Very tight fit, clearance around glow plug, no problem. Keeps hands from under the cowl.

Vince

Wow, even better!.... I thought it was all aluminum from the first pic.

I'm filing this away for future reference. Likely I will need it.

I like the remote glow, but I didn't put one on because of weight and because I thought the vibrations would flex the wire to death in short order. It'll be interesting to hear from you if it holds up.

The only 4 stroke engine I have is a Saito 100 and it is in my Waco SRE. It does vibrate some. Do those YS engines vibrate that much? It seems that every thread I read about them speaks to the incredible amount of vibration.

Bob - Where are you at with the CG ? I am using 3421SA's on the elevator half's, 9411SA's on aileron's, and a Hi-Tec big torque, (plane out in shop now), on the rudder, DS821 on throttle. Using an SR Nicad 2250 mah 6V, just for insurance for rx battery pack. Mounted right below Tettra tank, not dead on center but I can shift. My thinking a little nose down when balancing for maiden flight. Maynard, this YS does shake a little on idle, smoothing out increased RPM. I guess the Hyde mount will make it shake more.
I am still messing with it, have it down to around 2500 on idle right now, using 20% CP Pro-Pattern. Started with 30% heli, too much smoke.

Vince

Has anyone put a Focus Sport up with an OS120AX? They all can't have YS 110s, can they?

I just realized that my original thread is turning into a Focus Sport thread. That's OK, because it seems to be the best answer so far in a "smaller pattern plane", even though it is an ARF or an ARC. It won't be a cheap build for a guy that is used to sport planes with $25.00 entry level digital servos. If I can get by with an OS 120AX instead of the YS 110 or the new 115, I can save several hundred bucks, and run on cheap 10% fuel. I figure the best servo package, (that Troy Neuman shows on his awesome and lengthly build thread), will cost about $485.00. When all the parts are added up, I will bet that this plane requires about a $1,500 investment. If you use a YS 4 stroke, a Hyde mount, and a nose ring, the total will be closer to $2,000. So the solid mounted OS 120AX will save about $500.00. I just wish someone would try that combo and let us know how it works.

Maynard, you should be able to find that combo. When you pull up the ''discussion area", the box at the top left, let's you plug in your subject choice. Just put in, "OS 120 AX Focus Sport", or any other combo related to it. It should bring any RCU post's on the subject forward. Here is one, check out this guy, below, look him up on the search.


randy10926
Posts: 168
Score: 100
Joined: 10/31/2002
Last Login: 12/14/2009
From: Manassas, VA, USA
Status: offline Anyone set a Focus Sport up for a single Elevator servo and/or an OS120AX yet? I just got my and opened the box. I plan on going with the OS120AX and single pitch servo route.





Vince

The recommended CG is 6-1/2" but that is a little conservative, as is usual for an initial set-up. Mine is at 6-5/8" now, and I will probably move it back a tad more, to 6-3/4 or 6-7/8. Not bad now, but a bit less push on elevator when inverted would be perfect. I'm using a 1200-mah Sanyo 5-cell NiCd, right behind the firewall, but because of the CG situation mentioned above it will probably end up somewhere near the wing tube.

I ran 2 gallons of 30% heli through mine, and now mix 30% heli (23% syn oil) with 10% Cool Power (18% syn oil) to end up with an almost perfect 20/20 blend. The engine really likes this, although I have read and heard that guys sometimes switch to 30% heli in hot, humid weather because it runs cooler. Idle, mid-range, top end and transition are all fantastic. Easy to see why the serious pattern gurus like them.

Thanks Vince..When I looked up Randy I guess he switched to an OS160 or something. Maybe I will have to be the pioneer. I will wait until at least next spring to get involved in the Focus Sport.

Maynard, the 120AX has got plenty of oomph for this plane. Just need to modulate the throttle a little more on uplines to simulate the mid-range torque of the YS.

To keep the fuel tank on CG (the only way to go, really) you would need a Perry, Cline or Iron Bay regulator. Very easy to tap the crankcase backplate for pressure.

Thanks for info Bob. Hope you guy's are doing OK with the snow, etc. We were deluged with rain here for day's. Looks like it headed north, turned to snow.

Vince