Hi Peter and All, While interesting it has a fatal flaw as small props are far less eff than say 6 larger ones in thrust/kw. Large props and low rpms is the key to range. In an EV such large unneeded losses just don't fly as kills range, increases weight/battery/cost. Next the effect on the wing would be far better done with blown lift from wing slots, etc giving a smooth, more powerful effect on lift, control on much less power. Same with all the drones now where 2 counter rotating blades on the same shaft of the vehicle dia would over double it's range or lift/kw, kwhr of battery. So yes it is wacky. KIS, Jerry Dycus From: Peter C. Thompson via EV <ev@lists.evdl.org> To: Lee Hart <leeah...@earthlink.net>; Electric Vehicle Discussion List <ev@lists.evdl.org> Sent: Sunday, March 22, 2015 12:04 PM Subject: Re: [EVDL] EVLN: 18 wing-motor NASA electric aircraft concept r:200mi On 3/22/15 9:42 AM, Lee Hart via EV wrote: > brucedp5 via EV wrote: >> http://www.itproportal.com/2015/03/17/nasa-testing-electric-aircraft-wacky-design-concept/ >> >> >> NASA testing an all electric aircraft with wacky design concept > > Why does the author feel the need to put "wacky" in the title? The > wing in question looks very normal, and the range of 200 miles in fact > quite reasonable for an early test model. > Because it is different, and that scares him.
Seriously, though, this is a very smart idea. You can pitch the props different for the different parts of the wing, you can even have some of the motors turn off entirely and have the prop feather away. Being able to use different power levels means the wings will be MUCH more difficult to stall. This idea has been thoroughly discussed on some of the airplane forums I read, and the consensus is that if they can work out the power problem (same problem we face with EVs), then this will work out really well. Cheers, Peter _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150322/fb51b09d/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
