YS63 setup
11-01-2003 | 08:06 AM
#1
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From: Singapore, SINGAPORE
YS63 setup
I am new to YS engine and have just purchased a YS63, and need your advice on the following :
1) Pack in the same plastic bag with the check valve is a small black set screw, what is this set screw used for ?
2) I plan to break-in the engine with the high-speed needle at 3-1/2 turns (1 tank), 3 turns (1 tank), 2-1/2 turns (10 tanks) and to max (minus 4 clicks) rpm for subsequent tanks. Any problem with this arrangement ? or is there a better arrangement to break-in the engine ?
3) I am using Wildcat heli fuel, 15% nitro 18% oil, instead of the 20/20 recommended. Will there be any performance loss or damaged to the YS engine ?
4) Is there a neccessity to use fuel line clips to tighten all the tube connections ?
5) Approximately how many turns do you have on the max-speed needle after the YS63 is properly tuned for max rpm ?
Appreciate any feedback on the above.
1) Pack in the same plastic bag with the check valve is a small black set screw, what is this set screw used for ?
2) I plan to break-in the engine with the high-speed needle at 3-1/2 turns (1 tank), 3 turns (1 tank), 2-1/2 turns (10 tanks) and to max (minus 4 clicks) rpm for subsequent tanks. Any problem with this arrangement ? or is there a better arrangement to break-in the engine ?
3) I am using Wildcat heli fuel, 15% nitro 18% oil, instead of the 20/20 recommended. Will there be any performance loss or damaged to the YS engine ?
4) Is there a neccessity to use fuel line clips to tighten all the tube connections ?
5) Approximately how many turns do you have on the max-speed needle after the YS63 is properly tuned for max rpm ?
Appreciate any feedback on the above.
11-01-2003 | 09:49 AM
#2
My Feedback: (24)
RE: YS63 setup
1) If you look at your high speed needle valve, you will notice that it has a threaded hole on the side of it. The set screw goes in that hole to secure an extension wire.
2) I usually run the engine sloppery rich below 4K rpm on the bench for a couple of tanks by opening up both needle valves until there is a huge cloud of smoke emitted from the exhaust. I then break the engine in some more in the air, running it around 700 rpm below peak.
3) Of course, there will be performance loss when you run lower nitro fuel. The 63 runs at pretty high rpm, so 18% oil will provide less protection. YS engines perform best when run on YS 20/20.
4) Fuel line clips are not necessary. I never had a fuel line popping loose yet.
5) This depends on the temperature, humidity, elevation, fuel used, and engine orientation. I think mine is at 1.25 turns out with the engine mounted inverted.
2) I usually run the engine sloppery rich below 4K rpm on the bench for a couple of tanks by opening up both needle valves until there is a huge cloud of smoke emitted from the exhaust. I then break the engine in some more in the air, running it around 700 rpm below peak.
3) Of course, there will be performance loss when you run lower nitro fuel. The 63 runs at pretty high rpm, so 18% oil will provide less protection. YS engines perform best when run on YS 20/20.
4) Fuel line clips are not necessary. I never had a fuel line popping loose yet.
5) This depends on the temperature, humidity, elevation, fuel used, and engine orientation. I think mine is at 1.25 turns out with the engine mounted inverted.
11-01-2003 | 12:09 PM
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From: NH
RE: YS63 setup
Erictan, if you don't have a tachometer, you really should get one. I have not found the YS to be especially temperamental, but you'll get a lot more out of your engine if you know just where you are on the rpm scale.
As to turns on the high speed needle, I would start from way out--three turns or more--then just fire up the engine and see how she runs. A new engine running rich will pop and splutter and run kinda rough. I would just turn in the high speed needle until it's running a bit more smooth and steady, and let the first tank run at that setting. For the second tank and thereafter I would just turn the nv in one click every couple minutes, keeping an eye on the tach as well as listening to the note coming from the engine. The low speed needle is an air bleed, which means ccw goes leaner, cw goes richer. You can probably start off with the factory setting, or if you do mess with it, then start off with just maybe one turn out--better rich than lean on the low end. Run the engine with throttle wide open for the first few tanks, and be sure you're generating plenty of visible exhaust.
As to your fuel, please don't run with 18% lube--either get another jug of higher lube fuel, or get a bottle of Klotz synthetic and add 3 oz to your Wildcat jug.
Once you get the engine in the air, be sure you have a plume of exhaust when your throttle is open. If you can't see the exhaust, bring the plane in and open the nv a click or two.
Nitro at 15% will probably run OK, but you'll definitely get more power at 20%, and more still at 25-30%. Also, I've found that I don't get as much power with 20% heli blends as I do with YS blends. Not sure why that is, but the difference is noticeable.
As to turns on the high speed needle, I would start from way out--three turns or more--then just fire up the engine and see how she runs. A new engine running rich will pop and splutter and run kinda rough. I would just turn in the high speed needle until it's running a bit more smooth and steady, and let the first tank run at that setting. For the second tank and thereafter I would just turn the nv in one click every couple minutes, keeping an eye on the tach as well as listening to the note coming from the engine. The low speed needle is an air bleed, which means ccw goes leaner, cw goes richer. You can probably start off with the factory setting, or if you do mess with it, then start off with just maybe one turn out--better rich than lean on the low end. Run the engine with throttle wide open for the first few tanks, and be sure you're generating plenty of visible exhaust.
As to your fuel, please don't run with 18% lube--either get another jug of higher lube fuel, or get a bottle of Klotz synthetic and add 3 oz to your Wildcat jug.
Once you get the engine in the air, be sure you have a plume of exhaust when your throttle is open. If you can't see the exhaust, bring the plane in and open the nv a click or two.
Nitro at 15% will probably run OK, but you'll definitely get more power at 20%, and more still at 25-30%. Also, I've found that I don't get as much power with 20% heli blends as I do with YS blends. Not sure why that is, but the difference is noticeable.
