Michael Howell Posted July 10, 2009 Author Share Posted July 10, 2009 You will have to open up to full screen to see propaly Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted July 10, 2009 Share Posted July 10, 2009 The only way you can tell if the winglets have any benefit is to fly with them off and see if you can tell any difference. My own opinion is that the reduction in drag with them removed will outweigh any aerodynamic benefit they have. It would be an interesting test. Quote Link to comment Share on other sites More sharing options...
Grant Wright - Mr Foamyjets Posted July 11, 2009 Share Posted July 11, 2009 Gents, The main reason it does not drop a wing is because it is a flat sheet wing, every flat sheet wing model i have designed or flown has never dropped a wing it simply mushes and drops the nose, Nigel Hawes was a pioneer and still is in the flat sheet wing model. I am no expert but i believe it is due to the fact the fact it is not symetrical means it has even pressure on top and bottom at same time, so simply stops flying until the angle of attack on the wing is fast enough to provide lift again. grant Quote Link to comment Share on other sites More sharing options...
Dave Towell Posted July 11, 2009 Share Posted July 11, 2009 That sounds about right. Flat sheet wings always tend to have next to no bad habits in a stall. Just look at shockies and they behave well, I have about 5 prifile foamy jets at the min and none of them have any vices in a stall. Its a cool looking plane, any chance of a plan? Mr Ashby might be able to squieze it in befor the end of the year! Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted July 11, 2009 Share Posted July 11, 2009 Surely a flat sheet wing is very symmetrical? Quote Link to comment Share on other sites More sharing options...
Michael Howell Posted July 11, 2009 Author Share Posted July 11, 2009 it would be worth finding out how she flys with out the winglets, the BULLET airfoil is loosely based on RG 15 it has not got the exact co-ordinates, when i built the bullet i wanted to see if i could build a cheap fun plane, most of the plane is made of balsa with a few carbon rods buried in the balsa to add support. The fusalage flat profile skeleton is made and everything is added around it. hope you enjoy. Edited By Michael Howell on 11/07/2009 12:17:15 Quote Link to comment Share on other sites More sharing options...
Grant Wright - Mr Foamyjets Posted July 11, 2009 Share Posted July 11, 2009 Posted by Timbo - Moderator on 11/07/2009 09:48:19: Surely a flat sheet wing is very symmetrical? yes timbo you are right techincally, but i meant in the sense it is flat both sides where a symetrical is round the same both ends ,but as far as i am aware it doesnt need a angle of a attack for lift on a symetrical rounded wing, as the rounded leading edge does that for you, most people when they tend to build flat sheet wings they tend to round the top leading edge which therically means its semi-semitrical lololo there are still people out there who say a flat sheet wing cannot fly even after all the thousands of depron designs and balsa ones. grant Quote Link to comment Share on other sites More sharing options...
Michael Howell Posted July 11, 2009 Author Share Posted July 11, 2009 i agree MANY FLAT SHEET wings fly, the wings on this plane although sheet balsa are shapped to a profile symilia to a rg 15, i wouldnt want to fly a fast plane with out any profile. do not think it would be stable enough, although it would work. you would be using up more power at a higher angle of attack to create lift. ,i i like working with sheet wings it all depends on what you are designing the model to do, they all work flat semi and symetrical. Quote Link to comment Share on other sites More sharing options...
Michael Howell Posted July 12, 2009 Author Share Posted July 12, 2009 have just found out how to edit the film amazing what computers can do Edited By Michael Howell on 12/07/2009 12:00:36 Quote Link to comment Share on other sites More sharing options...
Michael Howell Posted August 10, 2009 Author Share Posted August 10, 2009 This is just a update she has had over 6 flights now and all is well, have completed large loops,rolls inverted flying. she could do with a bigger batttery for longer flight times she is very stable on windy days. I am going to get the plane covered and looking pretty, i hope you enjoyed the video. Quote Link to comment Share on other sites More sharing options...
Michael Howell Posted April 26, 2010 Author Share Posted April 26, 2010 Quote Link to comment Share on other sites More sharing options...
Michael Howell Posted April 26, 2010 Author Share Posted April 26, 2010 Quote Link to comment Share on other sites More sharing options...
Michael Howell Posted April 26, 2010 Author Share Posted April 26, 2010 Quote Link to comment Share on other sites More sharing options...
Michael Howell Posted April 26, 2010 Author Share Posted April 26, 2010 had a good flying day so thought i would add a few videos Quote Link to comment Share on other sites More sharing options...
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