Greg Covey

Ok, thanks for the advice and cautions. My electric powered version will take advantage of the battery pack weight which doesn't change during flight. At this point, I am not sure if they will reside behind the firewall or in the cowl. I am leaning towards using three 5AH packs in parallel for a 15AH capacity but the cell count may range from 12s to 16s depending upon my choice of power system.

One possibility for the power system is as follows. It has the advantages of using readily available parts, relatively low cost, and light in weight. The main disadvantage, for me at least, is that the 42% Ultimate may not have strong pullout from a hover. (9200w/40lbs = 230w/lb)[ul][*] Neu [link=http://www.castlecreations.com/products/neumotors/nm2200.html]2225-1Y[/link] motor w/8mm shaft[*] P62 [link=http://www.neumotors.com/Site/Gear_Drives.html]Neubox[/link] w/14mm shaft[*] Castle Creations [link=http://www.castlecreations.com/products/phoenix_ice_hv.html]ICE HV 160[/link] ESC[*] Xoar [link=http://xoarprops.com/2BladeBeechLaminate.html]32x12[/link] prop[*] [link=http://maddog-rc.com/]Mad Dog RC[/link] motor mount[*] 12s 10AH LiPo Supply[/ul]
This setup was used by Josh "BoneDoc" Young and produces 9200 watts at 215 amps peak power. Josh uses it on his 40% 119" Extra 330SE. You can see his flying video [link=http://www.youtube.com/watch?v=AaaeTAyS4Jw]here[/link].