The powered paraglider lasted about 40 minutes. Heaps of power though so most of the time not much throttle had to be used to hold height. I am not sure how long it would last at full throttle. It used the 30A battery listed on their site.
Todd ________________________________ From: Mike Borgelt <[email protected]> To: Discussion of issues relating to Soaring in Australia. <[email protected]> Sent: Tue, 27 July, 2010 11:34:46 AM Subject: Re: [Aus-soaring] electric glider Matthew, Further to the last post: With the electric motor there are no reduction belt power losses as it is direct drive so not directly comparable to a piston engine. I'm not entirely convinced about the front power concept. It will cause a loss of glide performance by destroying the laminar flow over the fuselage front. The story about the R/C glider may have more to do with the model not having enough up elevator to trim it at climb speed with a high thrust line and moving the motor to the nose fixed that. While the motor is running there is lots of high velocity air flowing over the fuselage causing more drag. In any case while a get you home engine is a good idea it doesn't solve the launch problem. 10% of the utility for 90% of the complexity. Todd, How much battery on the powered chute? Mike At 09:18 AM 27/07/2010, you wrote: >Front mounting electric motors seem to be increasingly feasible, >some companies are already selling them. > ><http://www.front-electric-sustainer.com/>http://www.front-electric-sustainer.com/ > > >Their motor goes up to 25kW for use only as a sustainer (1.6m/s), so >perhaps a more powerful motor is needed for self launching... > >~Matthew Scutter~ > >On Tue, Jul 27, 2010 at 8:27 AM, Mike Borgelt ><<mailto:[email protected]>[email protected]> >wrote: >Anybody want to do an electric self launcher? > ><http://yuneeccouk.site.securepod.com/PowerMotor_Tech_spec.html>http://yuneeccouk.site.securepod.com/PowerMotor_Tech_spec.html > >Off the shelf motor, controller and battery tech. >A 20 Kw motor with controller and 4Kw-hour battery pack along with >suitable prop should be around 37 Kg mass. >Say under 40Kg installed. >I'm enquiring about price. Will report. >Mike >Borgelt Instruments - manufacturers of quality soaring instruments since 1978 >phone Int'l + 61 746 355784 >fax Int'l + 61 746 358796 >cellphone Int'l + 61 428 355784 >email: ><mailto:[email protected]>[email protected] >website: <http://www.borgeltinstruments.com>www.borgeltinstruments.com >_______________________________________________ >Aus-soaring mailing list ><mailto:[email protected]>[email protected] >To check or change subscription details, visit: ><http://lists.internode.on.net/mailman/listinfo/aus-soaring>http://lists.internode.on.net/mailman/listinfo/aus-soaring > > > >_______________________________________________ >Aus-soaring mailing list >[email protected] >To check or change subscription details, visit: >http://lists.internode.on.net/mailman/listinfo/aus-soaring Borgelt Instruments - manufacturers of quality soaring instruments since 1978 phone Int'l + 61 746 355784 fax Int'l + 61 746 358796 cellphone Int'l + 61 428 355784 email: [email protected] website: www.borgeltinstruments.com _______________________________________________ Aus-soaring mailing list [email protected] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
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