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Old 02-28-2010 | 06:24 AM
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s-chester
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From: petch tekva, ISRAEL
Default RE: Trial & error matching electric system

Hello Joe



Exactly what you write and others write, I try to prove or disprove .
I believe that models have a different working point - flying at different speeds with different style
I personally have difficult to establish such general things to all spectrum of options
so I want to show the work I have done on the specific model that I'm flying in the style I emphasizes (my model has a lot of dragge & it is flying very slowly ),
I want to show how different it is from the familiar general formula ,that's all .

I have a problem with assumeing that the rpm Remained constant =constant Watts? in flight?
The watts will change when the load on the propeller varies, it depends on the speed of the Air flow on the propeller .
so when ther is larger gap between the rpm & Watts can we assume it is mor eficient ?
But everything changed in flight , no one Can fly perfect ,
At least I can't
So maybe we need to use average rpm & average Watts
I have no problem providing the data

I fly the Osmose of CA is my third electric model, after an Intgrl of CARF& Beryll of OXAI
The Clubs I belong to are 50% electric F3A today

I work every day ,regardless F3A, in electric aviation

Shlomi Chester
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