RunRyder - Engine stops in mid -air

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Thunder Tiger Raptors 30-90 - Imperio > Engine stops in mid -air

Syphonics
Heliman
Location: Singapore

This morning i flew my raptor 30 and was doing some loops and firgure 8, out of a sudden my engine dies off. And it auto-rotate from a height of 2-3 storey, as it was about to land it come crashing at 1 meter height.
Was wondering what is the reason for the engine stoppage. I have notice that the first coil of my OS 8 glow plug is not glowing, its only the second coil onwards is glowing.
My muffler is also slightly loose.

04-23-2006 Over year old.

Grant H
Key Veteran
Location: Maryland

Well, Seeing that your muffler was lose, you could have lost compression and fuel feed.

04-23-2006 Over year old.

HOMEPAGE

Nick Jones
Key Veteran
Location: Redding, CA

Mymuffler fell off in flight and it didnt die. Although it was on a hyper 50.

-RCer

04-23-2006 Over year old.

Syphonics
Heliman
Location: Singapore

could it be a lean engine?

04-23-2006 Over year old.

Nick Jones
Key Veteran
Location: Redding, CA

Its pretty easy to tell. How hot does you engine get? Also what motor is it?

-RCer

04-23-2006 Over year old.

Strider
Heliman
Location: San Diego, CA!

Old fuel? I grabbed an old (previously opened) gallon of fuel by mistake the other day. First two flights on the jug ended with 2 unplanned autorotations, once during a roll and the other on launch. Further testing showed the engine kept dying under any significant load. This particular jug had been sitting for a long time in storage. This got me thinking so I pulled a new gallon of fuel and ever since the heli has been flying just fine...

04-23-2006 Over year old.

Strider
Heliman
Location: San Diego, CA!

Syphonics, that's a good question. The obvious escaped me. Have you checked the operating temp on the head?

04-23-2006 Over year old.

Syphonics
Heliman
Location: Singapore

the temp that i got is about 90-100 for the heatsink on my os 37 shz engine.

04-23-2006 Over year old.

Nick Jones
Key Veteran
Location: Redding, CA

Then its not lean. If that in farenheit.

-RCer

04-23-2006 Over year old.

Syphonics
Heliman
Location: Singapore

thtas degree celcius. equivalent to 191-212 farenheit.

04-23-2006 Over year old.

Nick Jones
Key Veteran
Location: Redding, CA

Richen it about 4 clicks. Mabe more. On a blue sky day there should be a nice strand of smoke behind it.

-RCer

04-23-2006 Over year old.

Syphonics
Heliman
Location: Singapore

what temp should i be getting on the backplate?

04-23-2006 Over year old.

Nick Jones
Key Veteran
Location: Redding, CA

I think in the range of 120-150 degrees f. On the head.

-RCer

04-23-2006 Over year old.

Rcer22
Veteran
Location: Somewhere In The Adirondack Mountains

Quote
what temp should i be getting on the backplate?

You should be able to hold your finger on it for at least 5 seconds or so and not get burned.

Quote
I have notice that the first coil of my OS 8 glow plug is not glowing

That might have been because the plug got too hot and burned. I would change it to be sure.

04-23-2006 Over year old.

HOMEPAGE

jbeech
rrAdvertiser
Location: Sanford, FL (Orlando area)

When your muffler came loose you lost muffler pressure to the fuel tank. This, in turn, resulted in the engine running quite lean. no mystery.

As for the glow plug, replace it.

Finally, if this has happened before (and loosing muffler pressure wasn't the culprit), then I suggest you check for a tear in the fuel line inside the fuel tank. Most likely quite near where it fits onto the bung.

Kindest regards,

John Beech - GM (and janitor)
Audacity Models

04-23-2006 Over year old.

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Thunder Tiger Raptors 30-90 - Imperio > Engine stops in mid -air

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