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brubakermal(at)yahoo.com
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 Posted: Thu Sep 27, 2012 5:02 pm Post subject: oil usage?? |
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My new plane has oil injection and i have never used oil injection befor so im getting used to topping it off. it looks like my last 2 nites flying four short flights 4 landings and take offs with taxing and such I burned 9 gallons gas in 2.2 hrs and used 12 oz of semi synthetic oil.
Is this a safe amount? of oil for that many gallons of fuel over that time on the tiny tac?
mal
Malcolm & Jeanne Brubaker
Michigan Sport Pilot Repair
http://michigansportpilotrepair.com/
LSRM-A, PPC, WS
Great Sails - Sailmaker
for Ultralight & Light Sport
(989)513-3022
[quote][b]
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herbgh(at)nctc.com
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| Posted: Thu Sep 27, 2012 5:11 pm Post subject: oil usage?? |
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Mac
Oil injection runs proportionately to the throttle opening...Good thing...lean of oil at low speeds and likely 50 to 1 at elevated rpms.. notice the lever on the oil pump... it has a linear function... Herb
At 08:00 PM 9/27/2012, you wrote:
[quote]My new plane has oil injection and i have never used oil injection befor so im getting used to topping it off. it looks like my last 2 nites flying four short flights 4 landings and take offs with taxing and such I burned 9 gallons gas in 2.2 hrs and used 12 oz of semi synthetic oil.
Is this a safe amount? of oil for that many gallons of fuel over that time on the tiny tac?
mal
Malcolm & Jeanne Brubaker
Michigan Sport Pilot Repair
http://michigansportpilotrepair.com/
LSRM-A, PPC, WS
Great Sails - Sailmaker
for Ultralight & Light Sport
(989)513-3022
[b]
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pc.king(at)comcast.net
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| Posted: Thu Sep 27, 2012 5:24 pm Post subject: oil usage?? |
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Doesn't that come out to 96:1?
Is that right?
[quote] ---
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donaho1(at)verizon.net
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| Posted: Thu Sep 27, 2012 5:47 pm Post subject: oil usage?? |
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That`s the ratio I got, when I did the math. (96/1) Seems a little lean on oil to me. I took my oil injector off my 503, so I could install an electric starter. I premix 50/1, so I`m not sure if an average of 96/1 is good or not. As Herb said the amount of oil injected varies with RPM. Still that might not be enough oil. In order to average 96/1 it has to be running at an even higher ratio at some throttle settings. That would make me nervous. Lanny FSII
From: pcking (pc.king(at)comcast.net)
Sent: Thursday, September 27, 2012 9:22 PM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: oil usage??
Doesn't that come out to 96:1?
Is that right?
[quote] ---
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herbgh(at)nctc.com
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| Posted: Thu Sep 27, 2012 6:15 pm Post subject: oil usage?? |
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The link talks about over 100 to 1....Herb
At 08:44 PM 9/27/2012, you wrote:
[quote]That`s the ratio I got, when I did the math. (96/1) Seems a little lean on oil to me. I took my oil injector off my 503, so I could install an electric starter. I premix 50/1, so I`m not sure if an average of 96/1 is good or not. As Herb said the amount of oil injected varies with RPM. Still that might not be enough oil. In order to average 96/1 it has to be running at an even higher ratio at some throttle settings. That would make me nervous. Lanny FSII
From: pcking (pc.king(at)comcast.net)
Sent: Thursday, September 27, 2012 9:22 PM
To: kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: Re: oil usage??
Doesn't that come out to 96:1?
Is that right?
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byoungplumbing(at)gmail.c
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| Posted: Thu Sep 27, 2012 7:57 pm Post subject: oil usage?? |
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I guess I don’t understand “higher ratio at some throttle settings” seems that the oil injector has an actuator that is linked to/with the throttle....when you are at idle, there is only a small amount of oil being injected,,,, when you are at WOT the oil injector is pumping more oil,,, but the ratio of oil to gas should be constant. more throttle =more gas and more oil less throttle=less gas and less oil....but both should be a constant mix..... the only experience I have had with oil injection was with a snowmobile.... when the injector failed for the second time,,,,, I removed it and went to pre mix.
boyd young
mkiii
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
That`s the ratio I got, when I did the math. (96/1) Seems a little lean on oil to me. I took my oil injector off my 503, so I could install an electric starter. I premix 50/1, so I`m not sure if an average of 96/1 is good or not. As Herb said the amount of oil injected varies with RPM. Still that might not be enough oil. In order to average 96/1 it has to be running at an even higher ratio at some throttle settings. That would make me nervous. Lanny FSII
[quote][b]
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zeprep251(at)aol.com
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| Posted: Fri Sep 28, 2012 5:19 am Post subject: oil usage?? |
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My flying friends refuse to trust oil injection from 503's to 582's.I was the only one in the group to stick with it from new purchase to sale of the FS2. I flew over 750 hrs with absolutely NO problems,checking the rings for free movement every 150 hrs,checking the bore and skirts for issues as well.At 450 hrs I pulled the heads and cylinders to de-carbon the top ring lands which showed carbon instead of oil when pushing on the ring through the exhaust port with a popcicle stick during inspection.I even used 100LL for the first 100 hrs or so because it was so handy at the airport.New plugs every 25 hrs.I loved that engine and I could find no fault with the factory engineers at Rotax who designed the injection system.Used Pennsoil for aircooled from the start.
G.Aman FS2 503 DCDI 750hrs MK3 Jabiru 2200A 760 hrs -
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Fri Sep 28, 2012 5:45 pm Post subject: oil usage?? |
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All, When discussing the advantages of oil injection over premixing at the
last Rotax class I went to, Eric said that the oil pump is a variable ratio
pump. More oil goes in at low rpm, on the order of the 2% (50 to 1) that is
recommended for premixing, but at cruise RPM it drops to around 1.6% or 70
to 1. Somewhere I've seen a graph showing oil consumption versus fuel
consumption that confirmed it but I'll be darned if I can find it right now
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tombaisley
Joined: 20 Jan 2012
Posts: 30
Location: afton,ny
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| Posted: Sun Sep 30, 2012 12:50 pm Post subject: Re: oil usage?? |
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there is a repairman on barnstormers recommending a 40:1 mix for liquid cooled rotax engines?
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