http://groups.yahoo.com/group/CriCri/ CriCri Tue, 26 Jan 2010 23:11:28 GMT nikogroup8 http://groups.yahoo.com/group/CriCri/message/4925 http://groups.yahoo.com/group/CriCri/message/4925 sorry I meant 5000$ for 2 m3 of machinable PU Tue, 26 Jan 2010 23:09:46 GMT nikogroup8 http://groups.yahoo.com/group/CriCri/message/4924 http://groups.yahoo.com/group/CriCri/message/4924 thanks Rob for this, today's progression : I was explained that numeric modele used by cnc machines is solidworks , not 3ds ... it is then converted to stl Mon, 25 Jan 2010 19:34:59 GMT Rob de Bie http://groups.yahoo.com/group/CriCri/message/4923 http://groups.yahoo.com/group/CriCri/message/4923 Hi Niko, The skin layup you propose (aramid - carbon - carbon - glass) is quite unusual, and I haven't seen a layup like that in a light aircraft. The standard Mon, 25 Jan 2010 19:34:59 GMT Rob de Bie http://groups.yahoo.com/group/CriCri/message/4922 http://groups.yahoo.com/group/CriCri/message/4922 Hi Niko, I will check with the mold maker about the (typical) cost per square meter, and report back. Also, I remember that this mold maker initially used a Mon, 25 Jan 2010 16:54:15 GMT nikogroup8 http://groups.yahoo.com/group/CriCri/message/4921 http://groups.yahoo.com/group/CriCri/message/4921 update : I have found a 3D designer who will digest the plans and provide me a 3D model of the 4 parts : 2 wings , horizontal stabilizor , fuselage (with Sun, 24 Jan 2010 21:46:27 GMT nikogroup8 http://groups.yahoo.com/group/CriCri/message/4920 http://groups.yahoo.com/group/CriCri/message/4920 more and more good informations come thans rob :) where is this machine situated? 600?/m? sounds almost ok if surface treatment is done. And I will design Sun, 24 Jan 2010 21:11:01 GMT Rob de Bie http://groups.yahoo.com/group/CriCri/message/4919 http://groups.yahoo.com/group/CriCri/message/4919 Hi Niko, I think your plans with CNC-machined PU-foam moulds are very interesting! I worked with them in a previous job (non-aviation), here's one: Sun, 24 Jan 2010 20:59:07 GMT nikogroup8 http://groups.yahoo.com/group/CriCri/message/4918 http://groups.yahoo.com/group/CriCri/message/4918 this was an example ;) I already found the right company for the tubes 80x86 (if airfoil wide enough , else even 65x59) , 2 tubes of 3 meters are about 900$ Sun, 24 Jan 2010 19:35:28 GMT Vincent Homer http://groups.yahoo.com/group/CriCri/message/4917 http://groups.yahoo.com/group/CriCri/message/4917 The oval tubes would be an interesting choice as they would be stronger in one plane. I see from their web site that they only come in lengths of 500 - 900mm, Sun, 24 Jan 2010 18:59:37 GMT nikogroup8 http://groups.yahoo.com/group/CriCri/message/4916 http://groups.yahoo.com/group/CriCri/message/4916 and here are in pictures : http://www.favonius.com/soaring/bagging/bagging.htm interesting technic , but not strong enough for a 2 meter long wing if we aim Sun, 24 Jan 2010 18:33:42 GMT Sean McDaniel http://groups.yahoo.com/group/CriCri/message/4915 http://groups.yahoo.com/group/CriCri/message/4915 Just a thought that popped into mind while reading your post… I’m actively involved in radio control gliders and we use vacuum bagging method to get Sun, 24 Jan 2010 18:26:45 GMT nikogroup8 http://groups.yahoo.com/group/CriCri/message/4914 http://groups.yahoo.com/group/CriCri/message/4914 thanks a lot for these precious informations as I am not fond of long build , I chose this option to try to have a perfect 3D model and make half polyurethane Sun, 24 Jan 2010 17:28:30 GMT Vincent Homer http://groups.yahoo.com/group/CriCri/message/4913 http://groups.yahoo.com/group/CriCri/message/4913 I have attached a file with reference to Pro-Composites, a company that sells kits and plans for a composite homebuilt that uses a fold-up method that could be Sun, 24 Jan 2010 16:24:34 GMT niko http://groups.yahoo.com/group/CriCri/message/4912 http://groups.yahoo.com/group/CriCri/message/4912 hello ! no big mistery , brushless engines have to be used , I don't thrust AGNI95 and PERM132 and other LEM which are usually used in old projects (electravia Sun, 24 Jan 2010 12:05:53 GMT nikogroup8 http://groups.yahoo.com/group/CriCri/message/4911 http://groups.yahoo.com/group/CriCri/message/4911 for those telling "If you do get a practical electric Cri Cri flying, I will personally bow before your presence." , I suppose that you know now that electric