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Performance percentage

 
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John Kirkgaard



Joined: 04 Aug 2019
Posts: 21
Location: Denmark

PostPosted: Tue Nov 21, 2023 7:15 am    Post subject: Performance percentage Reply with quote

Dear all,
I'm in progress of flight test of my Europa and have come to speed
performance test. I will need to show the speed for 100%, 75% and 65%
power settings and for various altitudes.
I have some difficulties understanding what Rotax/Europa means when say
75% power.
Looking at Rotax power graph you have 75% power only up to about a
Density Altitude of about 3500 ft.
On the other hand Europa writes about the performance for 75%
power (at)8000 ft.
When talking about let's say 75% power, will that be 75% of the max power
the engine can perform a Sea Level or the 75% of what it can perform at
the actual Density Altitude?
Trying to attach some graphs, but can't make it work.


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John Kirkgaard



Joined: 04 Aug 2019
Posts: 21
Location: Denmark

PostPosted: Tue Nov 21, 2023 7:18 am    Post subject: Re: Performance percentage Reply with quote

Trying to attach a second file

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peterz(at)zutrasoft.com
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PostPosted: Tue Nov 21, 2023 7:42 am    Post subject: Performance percentage Reply with quote

looks right to me.... 2500m = ~8kft
On Tue, Nov 21, 2023 at 10:26 AM John Kirkgaard <john.kirkegaard(at)gmail.com (john.kirkegaard(at)gmail.com)> wrote:

Quote:
--> Europa-List message posted by: "John Kirkgaard" <john.kirkegaard(at)gmail.com (john.kirkegaard(at)gmail.com)>

Trying to attach a second file




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John Kirkgaard



Joined: 04 Aug 2019
Posts: 21
Location: Denmark

PostPosted: Wed Nov 22, 2023 7:39 am    Post subject: Re: Performance percentage Reply with quote

Oops.
I did not notice, that the altitude is in meter. Now it all make sense.
Thank you.

Regards John


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