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03-10-2010 11:43 AM  8 years agoPost 1
Helijockey

rrKey Veteran

150 miles from somewhere

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I have a an OS55 in my trex which is driving me crazy! No matter what I do I just can't seem to get it to make decent power I've tried every possible combo of setting the needles and am seriously thinking of getting a YS56. In idleup at 2100 HS on my multigov when I give collective it reacts in slow motion. On the other hand it starts fine, the idle is smooth, the backplate is warm and it gives no indication of any problem till it's in idleup. The muffler is a hatori566 and fuel has 25% nitro. I'm really regreting selling my 50hyper Would appreciate if u guys can help out. My present needle settings r mid 1.75 and high two clicks over 1.50 turns.

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03-10-2010 01:24 PM  8 years agoPost 2
AaronJohnson

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mason,MI

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How much fuel have you ran thru it?

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03-10-2010 01:27 PM  8 years agoPost 3
SC Raptorman

rrVeteran

South Carolina

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Put the throttle ahead of the collective and see what happens.

Oh what a feeling 3D Flying can be
Magnum Fuels

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03-10-2010 01:45 PM  8 years agoPost 4
Helijockey

rrKey Veteran

150 miles from somewhere

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onequick96gt I've got two gallons through it. SC Raptorman could u plz explain what u mean?

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03-10-2010 02:16 PM  8 years agoPost 5
AaronJohnson

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mason,MI

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That is enough fuel thru it that it should be making power. I assume you know how to tune your engine. Kinda makes me wonder if the governor isnt working fast enough. Why dont you turn your gov OFF and fly it with a "V" curve to see if it has power or not. You should be making a LOT more power then a hyper. The hatori 566 is the same as the SAB-55 right? If so that is the same pipe I use and my 55HZ is a stump puller!

My 55HZ has been running around 175 F on the back of the case by the head at the end of the flight. I run rotor rage 30%, OS 7 glow plug, Hatori SAB-55, 17,835 rpm. I am just under 1000ft above sea level. I believe I am currently a little under 1.75 turns on mid and a click or 2 under 1.5 turns on high.

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03-11-2010 04:41 AM  8 years agoPost 6
LongVu78

rrApprentice

MASS

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I have plenty power even with Outrage pipe, much more power than a hyper for sure,

Have you ever got it over heat before?

Thanks Long

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03-11-2010 01:18 PM  8 years agoPost 7
Helijockey

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150 miles from somewhere

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Guys I did try it without the gov but still no luck As far as overheating is concerned so far that hasn't happened but if I keep messing with the needles I'm sure it will happen! I plan on taking the engine out and having a look at it. Will keep u guys posted.

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03-11-2010 02:47 PM  8 years agoPost 8
SC Raptorman

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South Carolina

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SC Raptorman could u plz explain what u mean?
I use a throttle servo faster than my collective servos . I want it ahead of my collective , its like driving a car up a hill and waiting till you hit the hill and mash the gas but if you mash it before the hill it goes up it with speed.

Oh what a feeling 3D Flying can be
Magnum Fuels

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03-11-2010 04:13 PM  8 years agoPost 9
JuanRodriguez

rrProfessor

The Villages, Florida

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Faster throttle servo.....
That's been the topic of many a discussion over the years......

With the very small amount of travel involved (in idle up) and the speed in which the governor (or throttle stick) requests that movement, I seriously doubt that a faster servo will make any difference or even be noticable.....

But, that's just my opinion.... if you think it works for you,then that's great !

I think his trouble lies somewhere in the setup......

Been there, done that and old enough to know better.....

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03-11-2010 07:51 PM  8 years agoPost 10
Gearhead

rrMaster

Vt

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another thing, if your Throttle Linkage is to long or to short this will change the Engines out-put/response, plus it could make your Servo work harder if you have a governor..

Jim
Buzz Buzz Buzz

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03-12-2010 01:23 PM  8 years agoPost 11
Helijockey

rrKey Veteran

150 miles from somewhere

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Wasp linkage length is ok, Juan the setup is similar to my previous trex600 nitro but I'll go over it again over the weekend when I check the engine.

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03-12-2010 08:10 PM  8 years agoPost 12
Gearhead

rrMaster

Vt

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Jim
Buzz Buzz Buzz

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03-13-2010 11:26 PM  8 years agoPost 13
blade3d

rrElite Veteran

New Jersey USA

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YS 56 Duh

Blade3d

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03-14-2010 03:02 AM  8 years agoPost 14
TMoore

rrMaster

Cookeville, TN

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Try the MGP in limiter mode, flat line the throttle curve and see if that makes a difference or setup a V Curve to check throttle response. Unless the carb isn't opening all the way, the settings don't sound too far off. You may want to try another brand of fuel other than Model Technics just for comparision.

TM

Delayed Response Operator Not Engaged
AMA SECTION 336 = Good
Drones = EVIL

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03-20-2010 06:28 AM  8 years agoPost 15
Helijockey

rrKey Veteran

150 miles from somewhere

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After all else failed to solve the issue a friend told me to replace the clutch and bell. So when I took out the clutch I saw it had a crack in it Anyway put in a new clutch and bell and all is good now Thanks for all ur help guys!

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04-05-2010 11:10 PM  8 years agoPost 16
duckmansweb

rrApprentice

Sunshine coast, QLD, Australia

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try a different batch of fuel

CHANGING THE WORLD ONE HELI AT A TIME

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04-08-2010 11:22 PM  8 years agoPost 17
upsidedown2

rrNovice

Chesapeake, VA

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Take a close look at the gap between the carb and the engine block. You should see the two so close together that paper cant slide between. Also if you can see the black rubber "O" ring between them then you dont have the carb seated to the block. To seat them loosen the screw below the carb and then twist it back and forth while pusshing down very hard. Then line up the lines under the carb. While holding the carb down then tighten the screw.

Note: You may have to loosen the screw alot and push it back and forth to free the carb. Also re-check your throttle end points because they could have changed after rotating the carb.

Good Luck

John Forster
Just Another Pilot
AMA 176657
IRCHA 3592

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04-10-2010 06:03 PM  8 years agoPost 18
RAVVEN

rrNovice

Rustenburg, South Africa

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Nice to hear you have sorted out the problem....

For even more power, changed the glow plug, try OS 10 or older OS A5! changing the plug advanses/retards your timing

you work it out like this:
bigger engin = colder plug
smaller engin = warmer plug
high nitro = colder plug
low nitro = warmer plug

if you were running low nitro 15%(warmer plug) you would`v been fine with the os 8, medium plug,

you realy think getting a shorter/longer link from servo to carb will sort things out, or ever a faster servo... bullcrap!!!

hope this helped
Rudi

ABC- Always Be Controling!!

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