Hello Bob,
What altitude do you check
Le 09/09/2014 16:22, Robert Borger a crit : 5000rpm and 30" 120 kt ?
Many thanks
Michel AUVRAY
> Hi Gert & others,
>
> On a recent trip to Ruidoso, NM I set cruise" on my Airmaster (5000
> rpm) & 30 MP which resulted in 120 kts IAS with a fuel flow of ~5 gph
> (~19 lph). This is with a tri-gear & no speed kit installed. If I
> ever get around to installing the wheel pants & gear leg fairings it
> will probably be faster at the same fuel flow or I can cruise at the
> same speed for a lower fuel flow.
>
> I have heard that Rotax recommends not cruising at an rpm below 5000.
> I dont know how critical that may be.
>
> FWIW, a Grumman Tiger landed behind me followed me to the pumps. The
> copilot (pilots wife) said they ware cruising at 120 kts & burning 12
> gph (54.4 lph).
>
> Blue skies & tailwinds,
> Bob Borger
> Europa XS Tri, Rotax 914, Airmaster C/S Prop (75 hrs).
> Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
> 3705 Lynchburg Dr.
> Corinth, TX 76208-5331
> Cel: 817-992-1117
> rlborger@mac.com <mailto:rlborger@mac.com>
>
> On Sep 8, 2014, at 11:51 PM, Gert Dalgaard Srensen
> <stabelvej9@gmail.com <mailto:stabelvej9@gmail.com>> wrote:
>
> Hi Ivan - and others
>
> Two years ago I had opportunity to purchase a brand new 914, and a
> Woodcomp at a very reasonably price.
> Changed engine last summer after 700 hours og trouble free flying with
> the old constellation.
> With the old set-up - 914/Warp Drive - i did 105 knots at 4600 rpm,
> burning 16.5 ltrs./hr.
> At that power setting my old engine/prop really sounded like it could
> run for a thousand year - must be the "sweet spot", Ivan :)
>
> My new engine and prop. really sounds and feel OK at 4200 rpm / 30",
> and that is giving me exactly 120 knots IAS.
> But again - this prop. is a completely new world for me ...
> What power-setting are others aiming for at cruise with a 914 and
> adjustable prop?
> And what fuel-flow do you get?
>
> Regards
> Gert
>
>
> Den 08/09/2014 kl. 18.22 skrev Ivan Shaw <ivanshaw@btinternet.com
> <mailto:ivanshaw@btinternet.com>>:
>
>> Gert,
>> I would not run 4200rpm and 30.sounds a bit over square to me.
>> Best way to get your fuel burn info is by test on your particular
>> aircraft. Then arrive at a nice economy cruise speed/fuel burn and a
>> regular cruise speed.
>> Remember you want to cruise your Europa on the step AOA wise and
>> this will vary with aircraft weight and differing aircraft. But at
>> MTOW you want to be going 120kts indicated minimum to be nicely in
>> the groove.
>> Most aircraft have a sweet spot speed wise when the aircraft just
>> feels right!! Find the sweet spot for YOUR aircraft and cruise
>> there.why would you do any other?!!
>> Cheers
>> Ivan
>> *From:*owner-europa-list-server@matronics.com
>> <mailto:owner-europa-list-server@matronics.com>[mailto:owner-europa-list-server@matronics.com]*On
>>
>> Behalf Of*Gert Dalgaard Srensen
>> *Sent:*08 September 2014 16:05
>> *To:*Europa-List Digest Server
>> *Subject:*Europa-List: 914 / Woodcomp / fuel consumption ... ??
>> Hi
>> Could someone show me where I can find figures for the fuel
>> consumption on my 914 when let us say I go 4.200 rpm / 30" MP ... ???
>> All I can find is the graphics in Owners Manual and do. graphs. on
>> other Rotax enclosures, but the MP is not an item as far as I can see.
>> Regards Gert
>> OY-GDS
>> Mono/914/Woodcomp
>> <image001.png>
>
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