Exacly - you need to set up correct RPM. And RPM will be different with different speed. So could be possible to make some automatic system adjusting RPM.to put add some idea's... to the post of #841 "i.e...Good job! I would just change prop to feathering version"
i saw somewhere the builder was working on finding the correct R.P.M of the motor / prop , to have zero drag / zero thrust. Which would have lower power draw from the battery.
And would be a lower cost, compared to a feathering prop.
And also to go along with the "good" engineering
practice of KISS "Keep It Simple Sxxx"
........have a good day / rick
to spit- ball out at 2 cent idea's , to add to the low /correct RPM per speed idea' to go with zero drag and zero thrust'.Exacly - you need to set up correct RPM. And RPM will be different with different speed. So could be possible to make some automatic system adjusting RPM.
They are few areas where would be good to make research and testing.
Makes sense to try to keep "constant torque" to keep as high as possile electric propulsion efficiency? This could be done by in flight adjustable prop. And again - should be done automatically.
It is better to stop prop and feather it or keep prop in "sponzored windmiling"?
I would personally like to try combination of above mentionned and make "sponzored L/D computer". Combination of info from propulsion system and flight data could allow us to set up in flight "constant vertical speed" or "constant L/D". Glider computer connected to controller with output to prop adjustment system could do a very good job Of course software must be modified and set to exact type of plane.
Early mornign coffee dreaming...
Good idea. In Red Bull race they were using system of LED strip. Before entrance to starting gate were LED lights showing speed (from red via yellow to green) . They could not start race at higher than allowed speed. After passing thru start gate the same LED strip was showing "G-load" - higher than permitred load during maneouvres was causing penalty.to spit- ball out at 2 cent idea's , to add to the low /correct RPM per speed idea' to go with zero drag and zero thrust'.
one KISS idea would to add 3 good / green spots onto the prop rpm ,
the first good / green spot would be for the speed of being in lift,
the second good / green spot RPM would be the best L over D speed.
the third green spot (would be a range of RPM's) ,that would be VERY with VERYING SPEED to fly into a head wind.... """non glider pilots, may have to look this speed up in a ref manual""".
good day to all /rick
Thx -- Yes I have been there a while back - I will definitely be visiting again once I decide to convert. I have too time lines in mind. 1 is to commence winter of 22 using SS Bat if available or lithium or 2 wait if i know a better SS battery is to come out in 23. Cost is a factor as well. I cant afford to go crazy on batterries. I will base it on getting a new ICE motor -- so looking at that -- so budget saying for a new Thor 250DS, 4500$US?, for a whole electric system.
I was never measuring difference and I agree with you that "T" tails are better. My comment was based just on theory:Yeah, no. In terms of effectiveness per unit drag, V tails are no better than conventional tails.
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