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espuny(at)terra.com.br
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 Posted: Sat Aug 09, 2008 4:32 pm Post subject: RES: Re: Ethanol Myths - Facts and/or fiction? |
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912ULS - D.C.D.I. SPECIFICATIONS
[img]cid:image001.gif(at)01C8FA67.24948DB0[/img]
[img]cid:image002.gif(at)01C8FA67.24948DB0[/img]
DESCRIPTION
4 cylinder 4-stroke liquid/air cooled engine with opposed cylinders, dry sump forced lubrication with separate 3 liter (.8 gal US) oil tank, automatic adjustment by hydraulic valve tappet, 2 CD carburetors, mechanical fuel pump, electronic dual ignition, electric starter, integrated reduction gear i = 2.43
Version
Performance
Torque
max RPM
[img]cid:image003.gif(at)01C8FA67.24948DB0[/img]
kW
hp
1/min
Nm
ft. lbf.
1/min
1/min
912 ULS
69
95
5500
128
94
5100
5800
max. 5 min.
73.5*
100*
5800*
* with ROTAX Airbox and exhaust system
Bore
Stroke
Displacement
Compression Ratio
84 mm
3.31 in
61mm
2.4 in
1352 cm3
82.6 cu. in.
10.5:1
[img]cid:image004.gif(at)01C8FA67.24948DB0[/img]
Fuel
Oil
Cooling liquid
min RON 95
API SF or SG
50% Water/Coolant
*leaded or unleaded or AVGAS 100 LL
-----Mensagem original-----
De: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] Em nome de dave
Enviada em: sábado, 9 de agosto de 2008 20:49
Para: kitfox-list(at)matronics.com
Assunto: Re: Ethanol Myths - Facts and/or fiction?
--> Kitfox-List message posted by: "dave" <dave(at)cfisher.com>
[quote]Don't bet a lot on the placard. Some folks have found ethanol in unmarked pumps that the attendent said had none. Larry
Yes, you hit the nail on the head Larry. I was told the same from guys who work at the tank farm here locally. They basically you have no idea what % ethanol is in the gas from time to time and it can and will change.
Octane can vary as well. Rotax 2 strokes and 912 UL and 914 are fine in Regualr grade. The 912 S with higher compression does like Premium grade better.
AVGAS -- will add alot of lead to your engine - 2 or 4 stroke Rotax. Rotax does not recomend AVGAS >period !! but many seem to think it ok. ?
--------
Rotax Dealer, Ontario Canada
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Atualizado em 09/08/2008
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dave
Joined: 22 Sep 2006
Posts: 1382
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| Posted: Sun Aug 10, 2008 1:20 am Post subject: Re: RES: Re: Ethanol Myths - Facts and/or fiction? |
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http://www.rotaxservice.com/rotax_tips/rotax_feed4.htm
Aviation Fuels
It is possible but not recommended to use 100LL AVGAS, since the the lead content is like cholesterol to your engine: it will accelerate wear on the valve seats, create deposits in the combustion chamber and sediments in the lubrication system and gearbox. Increased maintenance is necessary to compensate. Unlike "conventional" aircraft engines, lead is absolutely not essential to the proper lubrication and operation of a Rotax 4-stroke aircraft engine. The increased octane rating also has no marked advantage for the operation of your engine.
To be avoided:
"Regular" fuel except if used in the 912 A/F/UL and burned entirely on the day of purchase;
"Premium" fuel which is more than 3 weeks old
AVGAS except when the required automotive fuel is not available
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