Hi Sparky, You are quite right, this thread got a little out of hand really, heh heh.
1) It started about a couple missed opportunity at Brodaks, 1st, not wanting to fly the wing gear epower on grass, then not flying the second round flight with the backup IC plane because didn’t have 5% fuel handy and afraid it would run out early…
2) Then it went on to comparative power systems, and weather it would have happened with something else…
3) Then conclusions were made that not being prepared can and will happen no matter what power system you use, then
4) We went on to the advantages of less moments of inertia, and weather some power packages actually had that advantage or not, but
5) Then we found we couldn't compare moments of inertia of power packages without figuring out what was like for like because we were comparing an Epower system in a smaller plane to a the biggest IC in a larger plane... blah blah blah…
Hahahahahahahahah! Talk about thread drift! Sorry Sparky! These things really do take on a life of their own!
Any who, it still boils down to personal preference, because most of the systems discussed can be designed or trimmed to at least a somewhat similar corner and feel at the handle if you are willing to do the work.
That assumes that any 2 pilots would like or want the same feel at the handle... which is a whole nother story.
You keep saying the heaviest parts on yours are closest to the C/G, and I keep trying to tell you the front mounted motors with all it's weight hanging on the spinner ring makes it a darn near wash, and well within the noise if you compare it to a comparable IC setup (not ideally my 75 and big Katana, say a 40 in a Staris would be a more apple to apple to your current bird). All you have to do is plug the numbers in the spread sheet and play with placement a little and you will see for yourself, If I move your 6.5 ounce motor back to where an IC engine bolts in, then wow, yes, you have a HUGE reduction in moment of inertia.
You like mechanic's terms, ok...Take a pencil and hold it by the pointy end. Put 2 pennies on the pencil a half inch back from the eraser. Remember how that feels pinched between your finger tips, thats the IC engine. Now remove those and take 1 penny and put it out on the eraser itself. Thats the EP. Its a wash. Like Derek said, we can feel the difference of a steel vs/aluminum lock nut on the prop because it's out at the very end of the moment.
Posturing and joking aside, I am truly VERY HAPPY for Sparky that he has a plane now that he really really likes, I know it's been a long and twisted road getting there for him, with many builds he's done since he put up this great forum. Sparky should be very proud that he’s done something not many of us can, and that is build a plane that came out as planned with the exact feel he wants.
I thought his P47 was the cat’s pajamas myself… it made the most visually pleasing corners I thought, regardless of what he was feeling at the handle. Wish I could finish half as nice as one of Sparky's too.
EricV
This is all I was saying look close E= engine F/B = fuel battery
IC 12.5 E -------6.5 F/B-------->LE------CG =19 OZ
EP 6.5 E -------12.5 F/B-------->LE------CG =19 OZ
Same weights just the the heavyest weight is closer to the CG. Concentrated weight is what sets up base line. This is not a debate about power or which on is better. Heck this has nothing to do with the title of this thread NOTHING.