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HelicopterMain Discussion › Strange Flame Out
12-05-2005 02:12 AM  12 years agoPost 1
Helibras

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São Paulo, Brazil

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Hi folks

I was flying my R30 today and after 3 flights (6 whole weekend) and aprox. 35 flights of my OS 37SZ it flame out when inverted during a roll at 25 ft height.

I managed to turn it back in and did what I could to land it as smooth as possible. Good luck mine and the Gods of Helimodels helped so just skids broke.

But it was a VERY unexpected flame out. Never happened before, temperature under control, good glow plug and brand new fuel. The tank was just under half when it happens and the only thing new today was installing the header tank and tank fuel line changed because was really bad.

Any clue?

Thanks


Gravity... the force to be defeated
Raptor 50SE; Hyper
Vigor CS; OS 91C-Spec MPII

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12-05-2005 02:29 AM  12 years agoPost 2
Kokamo

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Liberty Hill Tx

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Did it restart fine? The only thing I could think of is the glo plug wire broke. I have had that happen to me on my nitro cars before. How did the power feel before it did flame out?

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12-05-2005 02:38 AM  12 years agoPost 3
wolfdad

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Southern Maryland

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Check your clunk line in the header tank. Betcha you were close to being out of fuel as well. I saw this happen another time and what was going on was the clunk line in the header tank was just a bit long and when the heli was rolled inverted, the clunk and clunk line hung up on the back of the header tank. The individual got away with several times during the flight, each time with a bit of a stutter out of the engine, but it smoothed out and kept going....that is until all the fuel he had left was in the header tank, then it was auto practice time.

wolfdad sends....

"There are those who have...and, those who will" IRCHA #2117, AMA #70068, Turbine Waiver #105

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12-05-2005 07:25 AM  12 years agoPost 4
joe-diver

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Bend, Oregon

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I agree with wolfdad, check your clunk.

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12-05-2005 04:29 PM  12 years agoPost 5
Helibras

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São Paulo, Brazil

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It did restart with no problems. I've checked the glow plug after the accident and was good also, the filament was pretty shiny.

I installed the header tank and checked if the clunk was moving free and seams fine for me at that time, I will check again home.

Could be something related to throttle servo? Mine is kinda slow and collective one is pretty fast. Can the engine stop if overloaded with not enough throttle opening?

What do you think?


Gravity... the force to be defeated
Raptor 50SE; Hyper
Vigor CS; OS 91C-Spec MPII

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12-05-2005 05:08 PM  12 years agoPost 6
w.pasman

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Netherlands

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Installing a header tank may change the fuel pressure
Maybe you were running with improperly tuned needle?

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12-05-2005 10:42 PM  12 years agoPost 7
Helibras

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São Paulo, Brazil

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Yeah,

I did open 3 or 4 clicks on the main needle but maybe wasn't enough but was flying worm and great the first 2 tanks that day.


Gravity... the force to be defeated
Raptor 50SE; Hyper
Vigor CS; OS 91C-Spec MPII

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12-09-2005 04:43 AM  12 years agoPost 8
Helibras

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São Paulo, Brazil

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Hey guys,

I found what happened.

Wolfdad and joe-diver were right. After some piros and stall turns the clunk fuel line stretched out (in the first day!!!) and so the clunk loose the travel up and down. It was stuck in the down position and when I've got inverted no more fuel.

Mavrik dont deserve my full trust from now on, the fuel line was already dissolving.

Thanks


Gravity... the force to be defeated
Raptor 50SE; Hyper
Vigor CS; OS 91C-Spec MPII

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12-09-2005 04:50 AM  12 years agoPost 9
Kiwicocky

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Golden Bay , New Zealand

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Had the same thing happen yesterday, but right way up. os37,coming in for a real 'hot " landing ,1/2 tank left,20m up it died. It was a perfect set up for an auto thank God. I found the xxxxx remote glow had fallen apart. Would this be a cause. ?

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12-09-2005 01:23 PM  12 years agoPost 10
w.pasman

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Netherlands

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Whoops I had the clunk stuck to the bottom some time ago. But I thought it could happen only with nose-down tictocs and similar stuff. Luckily I noticed engine rev go up due to leaning out so I had enough time to flip back before flameout. Probably you have a governor, which disables that early warning sign...

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