If you didn't have the 914 you could fit a fuel flow meter. I use mine
as an indication of power. I cruise C 125 kts at 13.5 litres per hour.
That would equate to 13.5/22 thats 61%.
Looking at it another way you might be able to use your top speed. Speed
versus power is I think a cube relationship therefore for my max speed
which is around 150 kts ( If I haven't taped up the wing fuselage
joints, spat joints etc. ) 61% cube rooted gives a factor of 0.85 which
yields a speed of 127 kts.
Well its close.
Power Factor
100% 1.00
90% 0.97
80% 0.93
70% 0.89
60% 0.84
50% 0.79
Jerry
lts@avnet.co.uk
http://www.avnet.co.uk/touchdown
----- Original Message -----
From: Bradley Day <bjday@rdmcorp.com>
Subject: re: 75% Power
>
> Garry,
>
> I was also wondering the exact same things about cruise speeds.
> For what it's worth, I found some good info and data sheets
> on the Rotax engines at this web site:
>
> http://www.kodiakbs.com/prodlisting.htm
>
> If you look under "Typical Engine Weights/Performance Data"
> for the 4-stroke engines, it gives a table of power settings.
> There's a column for 75%, but I'm not sure how they equate
> 75% with 5000 RPM, exactly. The impression I get from the
> data sheets is that the maximum continuous power of the
> 914-UL is 100 hp at 5500 RPM, but I don't see anyone
> recommending doing that. I'm still trying to make some sense
> of all this information.
>
> B J Day
>
> bjday@rdmcorp.com (Bradley Day) (519) 746-8483 x-330 Fax 746-3317
> RDM Corporation
> Unit 4 - 608 Weber St N
> Waterloo On Canada N2V 1K4
>
>
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