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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › I Give Up!!!!!
04-02-2005 11:51 PM  13 years agoPost 1
JHT

rrApprentice

Orlando, FL

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I've got an OS 50 SX in an XL 46 Graphite and it is seriously giving me fits! The required adjustment on this thing is just too critical!

I think Monday I'm going to get the Hyper and just forget about the SX. I wanted to wait until the YS 50 came out but I'm beyond frustration... I'm pissed!

Besides, if you compare YS and OS side by side the OS is typically the stronger performing engine hp-wise.


Opps did I say that out loud?

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04-03-2005 09:45 AM  13 years agoPost 2
Al Magaloff

rrMaster

12,199 Posts- Enough Time Wasted. See Ya!

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What part of adjustment is giving you fits?

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04-03-2005 01:36 PM  13 years agoPost 3
James Vaello

rrApprentice

San Antonio

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Besides, if you compare YS and OS side by side the OS is typically the stronger performing engine hp-wise.
Maybe, but a YS is less finicky, and smoother ALWAYS. I bought a C-Spec after my YS .80 died. Still cussing it.

Nothing better than the smell of Camper Fuel in the morning.

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04-03-2005 05:32 PM  13 years agoPost 4
Al Magaloff

rrMaster

12,199 Posts- Enough Time Wasted. See Ya!

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I agree James. If you can't get a YS to run, the OS will be a REAL fun time.

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04-04-2005 01:20 PM  13 years agoPost 5
JHT

rrApprentice

Orlando, FL

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What part of adjustment is giving you fits?
I just can’t seem to get the low to a posittion where the engine will transistion smoothly from idle. I can get it so that the heli is idling perfectly, a little rich but the idle’s perfect. As I transistion it’s as if I have to “sneak up” on the hover rpm and if I do it too quickly it shuts off. I’tried all kinds of adjustments leaning it out, richening it up, adjusting the needle valve. It’s frustrating.

I understand the settings on the Hyper are a little more consistent and easier to set, probably due to the carb change – I didn’t do the “cat-eye” mod on my old 50 which is probably another reason why I’m having the problem.

I’ll probably pick up the Hyper today or tomorrow, I just hope I won’t regret not waiting on the YS 50.

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04-04-2005 04:57 PM  13 years agoPost 6
NRoof

rrApprentice

Palmyra, NY

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What fuel are you running.
Your profile says CP but what nitro percent?

I had all sorts of trouble when I was running 15% but I have had no problem across 4 separate OS50's since switching to 30% fuel.

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04-04-2005 05:52 PM  13 years agoPost 7
Al Magaloff

rrMaster

12,199 Posts- Enough Time Wasted. See Ya!

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JHT, one thing you need to check, is where the throttle barrel is at 0* pitch. You should be at 50% carb at 0* pitch. ATV's at 100% both sides. If a servo arm won't get you there, use a wheel, and drill the hole where you want it. You also need to maintain the parallelogram. Many people don't spend the time to set-up the mechanical correctly. Sometimes it effects the mixture. A good mechanical set-up always yields a nice flying machine. Those of us that can't fly, but can do great set-ups, take pride in this area.

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04-04-2005 07:03 PM  13 years agoPost 8
JHT

rrApprentice

Orlando, FL

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What fuel are you running?
I’m running CP 15% in both my 32 SX and the 50. I had heard that the 50 likes 30% better but 15% is within the range that OS says is acceptable. The reason I haven’t switched to 30 is that I don’t want to have to carry two types of fuel every time I go to the field.
You should be at 50% carb at 0* pitch. ATV's at 100% both sides.
I’m set up for ¾ stick hover which means that the 90 degree angles are first set at that position – 50% throttle at ¾ stick – pitch is at 5 degrees at that point. I then adjust my ATVs to maintain this relationship through the servo travel range. Right now I’m at 60 ATV on both ends. In this setup 0 degree pitch is at ½ stick – you can probably tell I’ve followed “Rays” book for the initial setup. What I’m expexperiencing shouldn’t be a problem unless the pitch is loading the engine too quickly during the transistion from idle to hover. I may be wrong but I don’t think so.

Thanks for the replies! Any other thoughts are appreciated.

JT

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04-04-2005 11:33 PM  13 years agoPost 9
Al Magaloff

rrMaster

12,199 Posts- Enough Time Wasted. See Ya!

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JT, Ray's book has a LOT of issues, but I'm not here to debate that. I don't have a book. But I do know how to get a helicopter to fly nice. So, humor me, and do it my way, see what happens. If it isn't completely different, I'll buy you the beer. I knew you would give me these numbers, that's why I asked. Try this: 0* pitch @ half stick, carb open 50% at 0* pitch, ATV's at 100% both ends, a servo wheel selected to allow this relationship. The servo at 90* at half stick. In your set-up, you are hovering at half carb( never gonna happen) and your servo arm is too long(60% ATV's) making the carb move way too fast for the fuel flow. Your needles are goofy, because you're asking the carb to do something it doesn't want to do.

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04-05-2005 12:10 AM  13 years agoPost 10
DS 8717

rrProfessor

Here wishing i was somewhere else

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50% is not enough throttle for hover,it should be 60% to 65%.
You need 50% throttle at midstick with 0 pitch in idle up modes.
We had a 50 at our field we could not adjust the bog out on throttling up,we tried every setting possible. The nozzle that has the cateye cut in it are very incosistant from motor to motor,some need it enlarged and some are too big without modifiing. I would buy another nozzle and try that,doing the cateye mod will only make the transition richer and make your problem worse if it loads up and quits when you throttle up. too much pitch shouldnt cause the motor to load up unless the blades are spinning fairly fast. even at half throttle you should have 0 pitch.

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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04-05-2005 02:19 AM  13 years agoPost 11
JHT

rrApprentice

Orlando, FL

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So, humor me, and do it my way, see what happens.
You've got a deal Al.. I've got a brand new OS 50 Hyper in my hands. I was going to buy it anyway. I'm a sucker for just about anything "new and improved" and that nice blue color just sucked me in.

I'll set it up tonight. Probably won't get a chance to try it out til Saturday but I'm game. I can always learn...

Thanks for the advice. I'll let you know what happens

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