Hi been a while and slow building, lost acct pw
Mactek that's a nice airplane looks like it would be fun to fly
While gone I got into rewinding motors and getting more thrust per watt; much better than
that 1170kv Cobra and apc 10x6
New pwr sys idea lower the kv to only what's needed for desired thrust:
3s 11.1v or 12vA123 LIFE batts, gws or apc 12x8 props, lowers rpm,
these planes with landing gear CAN use bigger props
for this power system, as opposed a typical FT Spitfire bellylander
rewind motor improves resistance from a mfr std distributed LRK delta TO a half parallel dLRK wye,
using either an iflight ipower 3508Q or 4008Q at 586kv to 660kv, both mount with std 22mm x-mount
use larger prop greater efficiency and lowering rpms
5336 for 2# 40.4mph and 6468rpm for 3# 49mph ...
got a different motor wound to 729kv hextronic d4023
gives me 54oz for 242 watts instead of
the Cobra test 58oz for 351w at 10,202 rpms!!!
Here's the Cobra 1170kv motor chart, see test with 3s apc 10x6
I think it's valuable to compare and contrast old pwr system to new
New idea using 12v and 12x8 props motor tests:
and earlier tests...
Developed new diagram sys for rewinding 12n config (stators with 12 heads)
using this sys you can draw diagram without any fancy hard to draw graphics
circles are wound counter clockwise, wind 1st head then goto the number on
the inside of the circle for the next and/or follow the arrow if adjacent like in
the std dlrk winds
These multirotor motors fit std 22mm x-mounts used with typical
Suppo 2217 A series motors
So I made this nose narrow but to allow either 35mm or 40mm motors
Manual V from RCGroups Turn Calculator
These motors have real nice large bearings, easy to wind, great quality,
4mm shafts for Q series, great price too almost same as Suppo 2217
Found 8 really nice wheels from a discarded Cosco baby stroller probably better than
airplane wheels you'ld buy at hobby shop, more durable, only 1oz each
Finally I found some very close matching 3 views, they are the Savage Cub
handy pie formula for sizing wrx
w size you want
x existing size 3v pic
r rate to increase or decrease by
Leonard