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HomeAircraftHelicopterMain Discussion › os91 More Fuel?????
04-02-2005 08:42 PM  13 years agoPost 1
thieving hobbit

rrNovice

Berkshire-England

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Hi,

I am used to flying old engines (100hours+) that need leaning out with age to keep the power.

My latest addition to the fleet though is working opposite principles.
I accept the last couiple of weeks have yielded warmer ambients (In the UK), but over the last few flights I have had to turn my main needle out a 'click' or 'two'. (every 5/6 flights/ gallon). It is now 4-5 clicks out when compared to last summer (which was considerably warmer than the last couple of weeks)

Does anyone know if this is engine fatigue, or maybe a fuel issue (perhaps fuel has more nitro than the container suggests?)

Really appreciate any help
Thanks in advance
Andy

<<<<<Is That All You've Got?>>>>>

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04-02-2005 09:56 PM  13 years agoPost 2
bigglesbutler

rrVeteran

Aberdeen, Scotland

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I noticed mine was doing the same, so I pulled it out and apart. The inside needed cleaning. But haven't run it since I cleaned it though, so dont know if that is the issue.

I would say clean it, use after run oil to put it all back together, then use a new glow plug.

Si

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04-02-2005 11:52 PM  13 years agoPost 3
CraigH

rrNovice

Maidenhead, Berkshire, UK

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You sound like an old plank flyer !


Craig
------------------------
Magnum Fuel
www.craigh.co.uk

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04-03-2005 01:01 AM  13 years agoPost 4
TMoore

rrMaster

Cookeville, TN

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In cold WX you can run it leaner without hurting it and in warmer climes you have to richen it up.

TM

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04-03-2005 01:07 AM  13 years agoPost 5
Ted Toth

rrElite Veteran

Myrtle Beach S.C.

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Ambient temperature and humidity play a part together
to effect your settings
I live on the Ocean for me humidity play a big part
between the early AM and mid day on my settings

.

You don't stop laughing because you grow old, you grow old because you stopped laughing.

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04-10-2005 10:26 PM  13 years agoPost 6
thieving hobbit

rrNovice

Berkshire-England

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CraigH You sound like an old plank flyer !
Evening Craig

rumour has it, I was not the only one spawned of plank flying loins

how was charmouth?

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04-11-2005 03:23 AM  13 years agoPost 7
KenChoo

rrNovice

Perth, Australia

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hi TMoore,

just wanted to note that in my experience the opposite has been true. I killed a 46FX in my plank one year (well, it didn't actually die but was way down on power) because I left the needle setting where it had been all summer, and come October to November (I flew on thanksgiving day 1999 when the temperature had dropped from the average of about 76 or so to 40, the engine ran too lean. Took a friend pointing this out to me before I realized (too late of course). In retrospect it makes sense, cause it's all about fuel air mixture. In much colder temperatures, the air density is higher requiring more fuel to maintain the proper fuel-air mixture. When it's really hot, the air density is lower requiring less fuel to maintain the mixture. Of course when it's hotter you have to be careful about being too lean that the engine doesn't receive enough lubrication.

Cheers,
Ken

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