PlaneKrazee

My Feedback: (14)

You may ruin the engine running on 30%. You should run the engine with a fuel that has at least some castor too.

Let us know what happens.

Flyboy Shady

Hi, the OS160FX has a tendency to pre-ignite in midrange. Hence you could use a colder plug and not have som much nitro, I use to fly with OS A5 plug and onlý 10% nitro. Works great.

Going for 30% will undoubtly preignite your engine.

PlaneKrazee

My Feedback: (14)

Flyboy Shady,

If you richen the low end a little the midrange knock goes away.

STG

My Feedback: (26)

The only time I have herd the 1.6FX to be successful on high nitro is at higher elevations. My 1.6's seem to be happiest on 5% to 10%. I would be surprised if they ran on 30%.

Flyboy Shady

Sky_pilot, the low end needle is set to answer throttle openings without spitting, hesitation and more. Also to ensure a safe idle.
Richen it to much may fix midrange but ruin idling and quick throttle response.

I believe midrange knocking is a known issue for 160FX which has been discussed on the forum. For me the problem vanished when I changed plug to A5 and kept with 10% nitro. OS themself claims A5 for their bigger engines nr8 for midrange and nr3 for their smallest. They seem right to me.

airborneSGT

My Feedback: (15)

Well I certainly wont try to ruin it but dont really care if I do! Its cheap!

So what is the favorite fuel and plug? I like the feedback. This thing will be beat on bad for mainly 3D and general bashing. The field has been dry and somewhat dusty. Perfect candidate to fill my flying needs and not ruin the $1200 + engines until things get sorted out at the field.

The Skorpa props and the Composite Bolly seem like the winners. I know the Bollys are very close to NX in the wooden variety prop. The NX or Bolly 22x8 really bring a 50cc to life.

For my 160fx I am putting the APC 18x6 up to bat first. If I can hand jam start this thing then I might use a CF spinner instead to save some weight. I have actually used starters on planes with CF spinners in the 50cc range without busting the spinner. I dont recommend it though!

Slightly off topic but the 140 RX would also seem neat as it is supposed to produce its power at lower RPM's. I guess I will get some flights on my setup and get feel for it. The Cermark pitts that I bought used had a Webra 1.20. I flew it before I bought it and it seemed far too underpowered on this setup. The next airframe is the Chip Hyde Cap X in the process of a re cover.

PlaneKrazee

My Feedback: (14)

I have run the engine on 5 to 15% with the OS 8 plug. I richen the low end to get no knocking in the air and have perfect extended idle (5 minute) and quick spool up. I ended up using 10% nitro 18% oil most of the time because that's what most of my other engines like. I'll be running 5% from now on and my other engines will have to deal with it or be sold.

r1derbike

A bit off-topic, but has anyone used the topflite 20X6-10 with this engine with any good reports? I'm afraid mine is going to O.S. service heaven for a rework.

Charles

LUDS96

My Feedback: (23)

I'm Back! Thank God for Hobby Services. Another Great Job! Got the engine back last friday "OS 160 FX Perry Pump" I put it on the plane and VROOOM! Started right up. Ran it for 15 to twenty minutes adjusted it just a little. Then up we go! NO MORE PROBLEMS ABOUT TIME! I don't know where I got this patience but I'm glad I waited this one out.
This is one fine flying set up! I've had this Plane almost a year and this weekend I realy got to enjoy it! I wanted more elevator but read all the post about the snap problem! I put my low rates where my high rates were and added some more elevator I took it way up and Guess what! You can't add more elevator she will only do about three quarters of a loop and snaps right out! So much for that test! Turned them back down to normal!
Also on the pressure line for the Perry Pump! My small blue hose did not look like it was going to make it with the bend. So I used a piece of Tygon Hose from my Gasser. Worked Great! Stiff enough to not flex with the pressure pulse and Strong enough to make the bend with out kinking!

I'm Thrilled to death with it. I ended up runnig the 17X8 APC Pulls great unlimited vertical. I'm Runnig it a little rich till I get some time on the new ring. Takes off nice lands fairly slow Unlimited Vertical. Now I just have to bring my Flying skills up to the Plane. I dont remember the tach readings but they were around 9,000.

This Forum has been a Great tool in getting this one Right. Thanks everyone. Steve

Tailgunner-RCU

I have a OS 1.60 that was running at 8400 rpm with a Top Flite 18 x 8 prop...until recently...

One day, out of the blue, the engine would not run past 7400 rpm...yep lost a 1000 rpm's...

I was told, by a fellow flier, to check the head bolts...sure enough, three were loose...

Well, I tightened them up and tried again...Still missing that 1000 rpm...

So I called Hobby Services. They felt a lean run caused some sleeve scoring. I never ran the engine lean (it leaves a smoke trial while flying), but I checked the engine anyway. Sleeve looks fine so does the piston.

One thing has me puzzled. When I turn the engine in the CCW direction (when I'm standing in front of the engine, this would be the normal rotation direction) the compression isn't much. Yet, when I turn the engine in the opposite direction (CW) the engine has plenty of compression...

Any one seen this before?

akschu

My Feedback: (5)

Sounds like you need to run a hone though the liner and get a new ring.

LUDS96

My Feedback: (23)

Well I cooked mine again. I got a new Goldberg edge I put the 160 from the Giles in it. Kept fooling around with props. I was trying some of the props I used before Master airscrew 18X8 Classic. Mejzlik 19X8.MA 18X6. MA 16x8, Mejzlik 19X6, I've got a Mejzlik 18X8 on order. I think I got it lean quit in the air. It did this a few years ago when I was first setting it up in the Giles. I pulled it out of the Plane and it should be at Hobby Services today. Remember to always reach peak RPM then richen it up 300 to 400 RPM

PlaneKrazee

My Feedback: (14)

LUDS96,

You can fill your tank 1/4 full, set the needle to peak or 100 down, then fill the tank and you will not go lean. Or you can use a Cline regulator, set the engine to peak and fly it without worry.

If you use a fuel with some castor you won't cook the engine, you will just get some protective varnish inside the cylinder.

I've been running a APC 19X8, a wide style blade with no problems.

Tailgunner-RCU

I did replace the ring, compression is good, but still have not regained those 1,000 rpm...

The cylinder wall looked good, would honeing it make that much of a difference?

LUDS96

My Feedback: (23)

I was trying a 19X8 Mejzlik. It either went lean or overheated. I thought it would be OK! I tried a friend 19X6 Mejzlik did not seem like enough prop.I ran a 17X8 apc on it for two years with out a problem. New Plane Ive got a 18X8 Mejzlik coming in I'm going to try that when the engine comes back from Hobby Services, I've had Great luck with there work! I opened up the cowl somemore. I'll just have to see whenit comes back! I have some 18X6-10 Menz props that a lot of the guys liked on the Great Planes Giles. But with the landing gear so close to the CG you never knew whenm it was going to tip forward. The Golberg Extra 330 seems a lot more friendly on the ground. Overall a really nice plane. I use Morgan Cool Power Omega 10 and 15% Runs good on the ten percent just seems to have a little more with the 15. Lkie I said motor ran great for two years it will be fine. I'm runnig a perry v-30 pump as well Tremendous throttle response.

PlaneKrazee

My Feedback: (14)

You may have better luck running the larger props using lower nitro and 20% oil. I'm running a APC 19X8 with 5% nitro, no overheating problems. My cowl is baffled and the outlet is 3X the size of the inlet.

akschu

My Feedback: (5)

What is the story with overheating and large props? What is it about a large prop that will cause the engine to overheat?

PlaneKrazee

My Feedback: (14)

A Mejzlik 20X8 is too much prop but it will turn a Mejzlik 20X6 or a APC 19X8.

[email protected]

My Feedback: (16)

Hello,
I noticed you are getting 8700 RPM on your ST 2300 with the APC 18X6W prop. I have the same set-up and am only getting 7400 RPM, running 15% fuel at sea level. I have the stock muffler and no pump. What pump and muffler are your running?
Thank you,
Seth

wcomet10

I have a 12-13 pound Katana mounting a 1.60 FX and a Bisson Muffler, should I plug one side of the exhaust? And also will this outfit be powerful enough to pull out of a hover? Maybe with some authority? It seems like the consensus is a 18x6 prop for 3-D. What brand of prop and what kind of fuel should I use?

stupidaso

My Feedback: (14)

What do you guys think about an APC 16x10? I use a 16 for ground clearance on my Ultra Sport 1000. Is it enough prop to keep the RPM from jumping too high too fast (once broken in)? I have not run it yet, the engine is new and the first one I have had over 1.00 cu in.

Any thoughts? I sure dont want to burn it up. Thanks

Flyboy Shady

A 16x10 will be fine, but why not 16x12 or 16x14? The os160fx will handle them!
Only problems are landings and potential overspeading issues.

stupidaso

My Feedback: (14)

OK, I'll break it in with the 16x10, then check the rpm and add more pitch for more speed later.
Thanks for the input. Can't wait to run it.

LUDS96

My Feedback: (23)

Any thoughts on a 19X8 Mejzlik

PlaneKrazee

My Feedback: (14)

The APC 19X8 turns at 6900 rpm peaked on 5% nitro. It is a bit overpropped for the engine but it will turn it. The best overall props are 18X6 or 18x8 APC.