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Women Pilots > Myth or true?

BOBBYJET
Heliman
Location: manchester

I have a os50 hyper, I have run 10 nitro on this heli….but keep being told that the heli should be on at least 20-30% nitro….

Dose more nitro make your heli run cooler?? I know 20-30 is more expencive but if the fuel runs better on it then I best get it…..what you guys use on your os50 hyper??

What you all think

Ps Thanks for you reply’s in advance

Bobby G

Heli 4 EVA 2007

11-13-2007 05:45 PM

baddraptor
Elite Veteran
Location: valencia, ca- usa

It is true, the hyper runs stronger on 30%. However, it doesnt run cooler. You do need to richen slightly for the 30%.

PS, this question would get far more responses in the engine forum as opposed to the womens pilot forum.

**Unattended children will be givin a shot of espresso and a puppy**

11-13-2007 06:04 PM

Tumlace
Heliman
Location: greensburg, pa usa

I have A 50 hyper too, I was told minimum 15% for basic flying but once into more 3D it would be much better for 30%, I am still learning to hover so I been using 15%

11-13-2007 06:06 PM

Zaneman007
Key Veteran
Location: Texas - USA

I'm just throwing this out there...

It is my understanding that you should run the engine temp the same regardless of the percent of nitro, but you should use a different glow depending on the amount of nitro.

Now, if 30% gets you more power at the same temp? Does it imply that it runs cooler?

I'd rather be flying

11-13-2007 06:26 PM

baddraptor
Elite Veteran
Location: valencia, ca- usa

Zane, no it wouldnt be running cooler. The reason being that 30% should be running richer than 15% at the same temps. IF you left needle settings the same, IE tune for 15% and then ran 30% you would have a severe lean run and fry the engine. So no it doesnt run cooler.

**Unattended children will be givin a shot of espresso and a puppy**

11-13-2007 06:42 PM

nivlek
Elite Veteran
Location: Norfolk England

Quote
Now, if 30% gets you more power at the same temp? Does it imply that it runs cooler?

Basically , the only reason that you can get lower temps with high nitro is that you can run the engine richer while still producing good power and still have decent throttle response .
However , if you peak the engine out to its maximum it will produce more power and more heat , which brings us back to the above question . If you change from 15% nitro to 30% , but richen the engine up so that it is only producing the same power as it was on 15% , then it will run cooler .

I only run 10% nitro and I remove the headshims on my OS engines to compensate a bit , from various tests that I have carried out , removing the shim seems to give equivalent power to at least another 10% nitro .

At the end of the day , it gets dark .

11-13-2007 06:52 PM

wlfk
Veteran
Location: uk

Why is this on the Women Pilots section?

Just curious.

K

A bit like a kite, but 500 times more expensive

11-13-2007 08:11 PM

BOBBYJET
Heliman
Location: manchester

whoops...sorry didn't know it was in the ladies section!!! lol

thanks for your reply tho.

Rob

11-13-2007 10:24 PM

oldboldpilot
Key Veteran
Location: Southern California

BOBBYJET,

To get the power the engine promises, you need to be running the 30% nitro.

Helis are Man's Defiance of the Laws of Nature - OCHC

12-09-2007 04:27 AM

flynbryan
Heliman
Location: Long Island N.Y.

30% ??????????

Hi all, I couldn't help but to respond to this one. Apparently The OS hyper 50 needs 3% more oil than nitro content. The 30% fuel does not have enough oil in it. 15% has 18% oil. I was running 30%. I got 4 to5 gallons through it before the bearings went south. I replaced the engine and began running 15% and 30% mixed. So far so good. There was a whole thing about it on this website under engines and fuel.
I plan to go to the trex 600 electric. I'm tired of the smoke and the noise. Not to mention the mess inside the helicopter. I also have a trex 450 and I just love it! No mess, no noise, no problem.

12-09-2007 11:42 AM

nivlek
Elite Veteran
Location: Norfolk England

Quote
Apparently The OS hyper 50 needs 3% more oil than nitro content.

Where did you get that from ?

At the end of the day , it gets dark .

12-09-2007 12:25 PM

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