Return-Path: Received: from mtain-mg05.r1000.mx.aol.com (mtain-mg05.r1000.mx.aol.com [172.29.96.205]) by air-me10.mail.aol.com (v127_r1.1) with ESMTP id MAILINME101-8bc44b960884102; Tue, 09 Mar 2010 03:36:20 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mg05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 218D738000092; Tue, 9 Mar 2010 03:36:19 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Nouu5-0003bO-Kc for rs_out_1@blacksheep.org; Tue, 09 Mar 2010 08:35:01 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Nouu5-0003bF-9G for rsgb_lf_group@blacksheep.org; Tue, 09 Mar 2010 08:35:01 +0000 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Nouu4-0008NQ-Kh for rsgb_lf_group@blacksheep.org; Tue, 09 Mar 2010 08:35:01 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id o298Yued013219 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 9 Mar 2010 09:34:56 +0100 Received: from [129.206.29.99] (pc99.iup.uni-heidelberg.de [129.206.29.99]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id o298Yx9T014969 for ; Tue, 9 Mar 2010 09:34:59 +0100 Message-ID: <4B9608CC.2070508@iup.uni-heidelberg.de> Date: Tue, 09 Mar 2010 09:37:32 +0100 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.7) Gecko/20100111 Thunderbird/3.0.1 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <9afca2641003081438l4a7a3c42t43b7e35ebb6c5718@mail.gmail.com> <4B95ECEB.6050608@gmx.com> In-Reply-To: <4B95ECEB.6050608@gmx.com> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: VLF Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039ac1d60cd4b9608831c49 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) Why a ballon? If you want to keep it reasonably stable in the sky you need a LOT of helium and a BIG ballon. And i assume nobody wants to use hydrogen instead of helium when operating with some 10kV ;-) That helium is very expensive and needs to be flow off each time. A kite is just one investment and can theoretically be used for many years. It can easily carry some kg for many hours. Watch out for "power sled 36" on youtube to get some video impressions (not my movies) of that kite (alternatively "power sled 81"). Perhaps i should create a video of the next field-test to show how easily the kite can be set up in the sky... :-) 73, Stefan/DK7FC PS: The owner of the kite shop told me that someone has used a power sled 81 at to strong wind and it lifted up his car at one side (a VW bus (!)).