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Fr5-300 sirius breather nipple

Old 04-08-2010, 10:50 PM
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Default Fr5-300 sirius breather nipple

According to the manual, there is a breather on the top, and a drain on the bottom. I, and many others are unable to locate a top breather, only the drain is visible. How should we inject after run oil to prevent rusting bearings etc please? Dont want to have to drill holes anywhere, and its pretty inconvenient to invert and pump oil up through the drain.
Thanks

jp
Old 04-16-2010, 10:10 AM
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Default RE: Fr5-300 sirius breather nipple

You have only the one opening. Geting after-run oil into the enigne is an absolute must. For an engine that expensive, it only makes sense to use whatever means necessary to get the needed 1-2 tablespoons of oil into the engine.
Old 09-28-2010, 10:41 PM
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Default RE: Fr5-300 sirius breather nipple

Bax,
I am now rolling plane over on its side after flying, and pumping oil in through the drain nipple.
Next question - manual says Drain should be plugged DURING running, and opened after flying to allow drainage of oil residue left from fuel. With no breather nipple now fitted, when should the drain be opened, when plugged ?
tks
jp
Old 09-29-2010, 09:04 AM
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Default RE: Fr5-300 sirius breather nipple

Apparently, the instructions were written before the engine actually came out. We've never seen anything but the nipple on the bottom of the engine. Leave it open, because the engine needs the breather.
Old 09-29-2010, 04:59 PM
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Default RE: Fr5-300 sirius breather nipple

Bax, Thanks for that. So if I continue to run it with the drain open, but plug while in storage, loaded with after run oil, it should be OK?

thanks
john
Old 09-30-2010, 08:54 AM
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Default RE: Fr5-300 sirius breather nipple

Yes, it should be OK that way.
Old 09-30-2010, 04:46 PM
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Default RE: Fr5-300 sirius breather nipple

Thanks.
john
Old 07-15-2016, 11:36 AM
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Originally Posted by Bax
Yes, it should be OK that way.
Dear Sir,
i realize that this engine is discontinued now, but i was hoping that you could reconfirm your statement on the drain plug.

i have a brand new one with approx 20 flights now, keeping the drain plug inserted as per the manual.
The engine seems to "flood" in oil after a flight, decreasing in rpm. When draining after a flight really a lot of oil poors out.

I really do not want to take a risk ans am wondering if sufficient oil will be accumulated/ centrifuged troughout the engine if the drain is left open (so no plug installed during flight)
I use 18% oil as per the manual.

Thanks in advance, Lieven
Old 07-19-2016, 08:12 AM
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Just leave the drain open at all times. Route it to vent any oil overboard.
Old 07-20-2016, 07:06 AM
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Thanks Bill,

I guess this must be some kind of translation error or partial relic of the original description with a breather and drain nipple (which apparently never made it to production).

I own a FT-160, FT-300, FF-320 and this FR5-300. All of them are flown regularly, and quality and reliability are just perfect if proper maintenance and operation are followed.

Just fyi, attached picture of my scratch build Lockheed Sirius, powered by the FR5-300.

Best regards, Lieven
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Old 07-20-2016, 08:28 AM
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That's a beauty!

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