motor params

[ramestica]

is there some extra information about motor parameters? I'm dealing with combustion engines.

If I have a 10x6 prop should I then use

Pitch, Steigung des Propellers = 6inch = 0.1524m

What is 'mittlere Propellerblatttiefe' (mean chord length of prop blades)?

There are two friction coefficients. I can change them and then I see that there is an obvious change in behavior. You can control the actual rpm for a given throttle setting and the torque transfered to the fuselage also changes. But my approach is a bit blindfull. I thought that perhaps there is out there a more descriptive definition of these parameters.

thanks,

[ggunners]

ramestica,

You have done good work so far. The mean chord length is the average width of the prop i.e. if the prop was tapered from .014 meters at the hub to zero at the tip, the mean would be .014/2 or .007 meters.

If you could quantify the effects of the motor drag coefficients, that would help others working on models.

FMS 2.8 is new, so you are the expert now.

-- ggunners

[ramestica]

ggunners, thanks for the mean chord clarification and your good will for support!

but there is still something that deeply bothers me about these friction coefficients. When dealing with a simulator, part of the fun is to understand the physical meaning of their parameters and to tune them accordingly. In this case the parameters units are defined as Pa=N/m and Pa*s^2. Isn't it that this pressure and not a coefficient? Does the 's' stand for time?

still working on tuning my OS .46 engine!