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HelicopterEngines Plugs Mufflers Fuel › OS 50 Hyper tuning
10-10-2010 03:31 AM  7 years agoPost 1
McKrackin

rrProfessor

Lucasville,Ohio

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What is the default on the needle?
I got my engine used and no manual.

Gonna use Cool Power 30%

I literally never use the word literally right.

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10-10-2010 03:32 AM  7 years agoPost 2
McKrackin

rrProfessor

Lucasville,Ohio

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I've never seen a nitro run before by the way.lol...

Gonna need some help here

I literally never use the word literally right.

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10-10-2010 03:36 AM  7 years agoPost 3
Dood

rrProfessor

Wescanson

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10-10-2010 11:42 PM  7 years agoPost 4
McKrackin

rrProfessor

Lucasville,Ohio

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Grazi Dood.

I literally never use the word literally right.

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10-11-2010 01:45 PM  7 years agoPost 5
BarracudaHockey

rrMaster

Jacksonville FL

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Take a stroll through RaptorTechnique.com

He's got two good articles on engine tuning, or smacktalkrc and watch Bert and Bobby teach you how to tune nitro.
2.5 turns on the high will get it running but it will be pretty rich.

Everything after that depends on the muffler, fuel, weather etc.

Andy
AMA 77227
http://www.jaxrc.com

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10-11-2010 06:39 PM  7 years agoPost 6
Zaneman007

rrElite Veteran

Texas - USA

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1.5 turns on the high end is the recommended starting point.

The low end should be horizontal.

I'd start there.

Old Guys Rule!

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10-11-2010 08:11 PM  7 years agoPost 7
Gearhead

rrMaster

Vt

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""1.5 turns on the high end is the recommended starting point.""

well he didn't say what Pipe, both my Hyper 50s with the MP2 tune-out around 1.75, with some of the newer Pipes they should tune-out leaner..

what Pipe ???

Jim
Buzz Buzz Buzz

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10-11-2010 09:27 PM  7 years agoPost 8
McKrackin

rrProfessor

Lucasville,Ohio

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MP5

I literally never use the word literally right.

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10-11-2010 09:49 PM  7 years agoPost 9
BarracudaHockey

rrMaster

Jacksonville FL

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It also depends on fuel, more nitro = richer needle.

Which is why I said to start at 2.5

Andy
AMA 77227
http://www.jaxrc.com

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10-12-2010 01:37 AM  7 years agoPost 10
Zaneman007

rrElite Veteran

Texas - USA

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I highly recommend that you go to the OS web site and follow the manufactures recommended settings to start.

Please see the excerpt from the OS manual below:
STARTING

2. Opening the needle-valve Firstly, turn the needle clockwise slowly until it stops. The position it stops is the fully closed position of the needle-valve. Make note this position for reference.. Open the needle-valve 1.5 turns.
Keep in mind this is just the starting point,

and good luck.

Old Guys Rule!

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10-12-2010 02:15 AM  7 years agoPost 11
McKrackin

rrProfessor

Lucasville,Ohio

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If you're going to quote the manual,you should add that in addition to the 1.5 turns out,you should go another 1.5 turns to run in the new engine.

I read the book.
What are you guys doing?
Why?
At what altitude?
What temperature?

I'm in southern Ohio.Around Portsmouth.

I'm using 30% nitro.

Basically,I want to know where to set everything to make it start without hydraulically removing the head or melting the glow plug.

Tips from users please

I literally never use the word literally right.

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10-12-2010 02:55 AM  7 years agoPost 12
Gearhead

rrMaster

Vt

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""Basically,I want to know where to set everything to make it start without hydraulically removing the head or melting the glow plug""

Main Needle, with the MP5 and 30% any where between 1&3/4 to 2 turns open,,

Idle Screw,, when the Idle Screw "Slot" is straight in-line with the Carb Throat, that is the Factory Setting,
now you can start it there, if it starts hard you may need to open the Idle Screw some (a lean Idle will make a Engine hard to start),, my Idle Screws are open more than the Factory Setting..

Jim
Buzz Buzz Buzz

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10-12-2010 02:57 AM  7 years agoPost 13
Santiago P

rrProfessor

South West, Ohio

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What 30% fuel?

some fuels run much hotter than others, up to 1/2 turn more.

What glow plug?

Is the engine new?

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10-12-2010 10:55 AM  7 years agoPost 14
McKrackin

rrProfessor

Lucasville,Ohio

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New engine.Yes.

Fuel is not here yet.I would like suggestions on that too.
OS glow plug.

Thanks for ALL the tips guys

I literally never use the word literally right.

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10-12-2010 12:54 PM  7 years agoPost 15
BarracudaHockey

rrMaster

Jacksonville FL

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RotorRage 30
OS8

Make sure the carb is fully seated, the head bolts are snug, and there's no machining debris floating around the engine.

Then start at 2.5 turns.

Andy
AMA 77227
http://www.jaxrc.com

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10-12-2010 02:14 PM  7 years agoPost 16
Dood

rrProfessor

Wescanson

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with the MP5 and 30% any where between 1&3/4 to 2 turns open,,
From my own experience with the MP5 on the OS50, I found the best setting was around 1.25 turns open on the high speed (you'd think it would be super lean but it wasn't)

This is in contrast to the same engine I ran with the older MP2, which I found worked best at around 1.5 turns open +/- 2 clicks.

Suggesting he starts at 1.75 or 2 turns open will get him VERY, VERY rich.

With the Curtis MP5, I suggest he starts with 1.5 out, per the manual. You will NOT cook that engine with the MP5 at that setting. And it will be plenty rich.

(But I suppose he would have found that out eventually when his engine dies every time he breaths on the throttle after starting)

--------------------------------
Make sure the carb is fully seated, the head bolts are snug, and there's machining debris floating around the engine.
Then start at 2.5 turns.
This is obviously some kind of joke, right?

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10-12-2010 02:28 PM  7 years agoPost 17
BarracudaHockey

rrMaster

Jacksonville FL

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hehe not a joke, a typo!

Yes, 2.5 turns will be very rich (not as rich as OS recommended starting point of 3 turns) but again, depending on the fuel type he's using (and its associated oil package) it could be rich or very rich.

In any case, starting on the rich side won't hurt anything. His needle setting may very well end up at 1 turn, but its a safe starting point.

Andy
AMA 77227
http://www.jaxrc.com

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10-12-2010 04:48 PM  7 years agoPost 18
red_z06

rrProfessor

Dumont, NJ

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Start around 2 turn open.

I would go with back plate method as it is fairly easy to follow.

Go up and do your most demanding (pitch intensive) maneuvers for 20sec. Immediately auto and check the backplate temp. For normal people (excludes fire pit walkers), you should be able to hold your finger firmly for 4-5sec.

If it is cool, turn in 4 clicks. Repeat until warm and reduce to 1-2 clicks at a time until above situation is reached.

For idle, pinch the fuel line and observe slight increase in rpm before cutting out. If it does not, open 1/8 turn at a time. If it takes more than 3-4 sec to get to elevated rpm, then close 1/8.

Warning!

If you tune with just circling, then when you start doing demanding maneuvers, you may cook your engine. We do it with continuous aile tic-toc.

www.JustinJee.com

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10-15-2010 10:07 PM  7 years agoPost 19
Richardmid1

rrProfessor

Leeds, England

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If the engine is new ide start 2 turns out as said before, hover 2 tanks then on the 3rd tank start leaning in 2 clicks per tank and start flying around doing gentle loops rolls etc. Tune for performance rather than back plate temp, make sure you have good smoke trail when loading the head up, no harsh sounds and see how quickly it drops to idle when you hit throttle hold.

60% of the time, it works every time!

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01-26-2011 01:13 PM  6 years agoPost 20
Switch_639

rrApprentice

Port Elizabeth,​South-Africa

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i cant seem to find a lsn on this engine... or on mine... does it have one? where is it located then? thanks

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