David,
G-JULZ has always run at 2.4 Bar in the cruise since new. I remember
talking to Andy Draper about it and he said it was normal and that G-GBXS
also ran at 2.4 Bar.
regards,
Mike
----- Original Message -----
From: "David Joyce" <davidjoyce@doctors.org.uk>
Sent: Thursday, September 13, 2007 10:01 AM
Subject: Re: Europa-List: Rotax 914 performance info request....
> <davidjoyce@doctors.org.uk>
>
> Bob, 2 Bar for oil pressure is very low for my 914, for any other than
> idling speed with very hot oil.It much more commonly runs around the 4 Bar
> level. 2 bar is actually the warning limit for the Flydat system when it
> starts flashing lights at you! Shell VSX4 came out in various articles as
> the clear top choice as I remember it. I wouldn't be happy running
> generally
> at as low a pressure as that. I would be inclined to check your oil
> pressure sender if you can, then change your oil, (for VSX 4) then if
> still
> low put a shimmy in the oil pressure relief valve under the gear box.
> Regards, David Joyce, G-XSDJ
> ----- Original Message -----
> From: "R.C.Harrison" <ptag.dev@tiscali.co.uk>
> To: <europa-list@matronics.com>
> Sent: Wednesday, September 12, 2007 11:37 PM
> Subject: Europa-List: Rotax 914 performance info request....
>
>
>> Hi! All
>> Today I began to enjoy fuel economy..!
>>
>> I and my observer brother did a 2 hour 2 landing trip with a couple of
>> timed climbs commencing initially at 1370 lbs and used only 24
>> litres(best capable measure since I wouldn't claim a scientific
>> measure!). Ambient temp/pressure was 22deg C /1024. Generally the
>> Manifold pressure was maintained to 27 inches excepting a timed
>> 1000ft/2000ft. 100% power climb at 85kts
>> 80seconds.... one hour later (fuel used lighter) 1,500ft/2500ft...115%
>> power climb at 80kts..60seconds ...I failed to collect the manifold
>> pressures during the climbs. However the intake manifold locally
>> insulated surface temperature was 31.1deg C during the initial climb
>> and 35 deg C during the high power climb. 100- 110kt cruise 5,150 RPM
>> the intake manifold temp at 2000ft was 27.4 deg C. (but in this instance
>> the manifold pressure was 29")
>> Intake manifold temp. at 1000ft 70kts was 30.8 deg C . At 100kt cruise
>> the coolant temperature was 92 deg C . Oil temperature was 98 deg C with
>> oil pressure at 2 bar.
>> I am using "Mobil One" 0w -40w and find myself wanting to increase the
>> oil pressure somewhat although the light viscosity oil must be "reaching
>> places where more viscous oils don't reach !" Would anyone care to pass
>> comment on the suitability of a higher oil pressure and the generally
>> accepted best climb speed, please?
>> The engine does not now appear to be using/loosing oil from
>> engine/turbo.
>> The rising coolant temps. on the sustained 115% climb would not have
>> enabled a 5 minute climb.
>>
>> Would any capable statistician care to crunch/"nit pick" these figures ?
>> and make appropriate recommendations with regards to the oil pressure ?
>> and does anyone have any comparable intake manifold locally insulated
>> surface temps without an intercooler fitted?
>> A radio test at 20nm 2,000ft was effected at "fives" abeam and
>> approaching Humberside Radar an item near impossible with the Jabiru
>> installation!
>>
>> Regards
>> Bob Harrison G-PTAG
>>
>> PS the stabilator torque tube clamps worked fine and won't need any heat
>> to remove them !!!!!!
>>
>> Robt.C.Harrison
>>
>>
>>
>>
>>
>
>
> --
> 13/09/2007 11:45
>
>
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