Mike Rolls Posted July 10, 2010 Share Posted July 10, 2010 I should have made the point that, like balsa, spruce does vary in weight - although not to the same extent. I have assumed close grained spruce (usually pretty dark in colour). Some open grained spruce can be a good bit lighter, but not as strong, as the close grained stuff. Mike Quote Link to comment Share on other sites More sharing options...
sparks59 Posted July 11, 2010 Share Posted July 11, 2010 Hi Guys, I have just joined the forum and, having recently finished a stock 'Popsie', hope you dont mind me posting a snap of my latest little fat friend on this thread. I'd like to build a supersize version one day,... when space at home permits! sparks Quote Link to comment Share on other sites More sharing options...
Barrie Dav 2 Posted July 12, 2010 Share Posted July 12, 2010 Hello Sparks. Welcome to the forum. Your Popsie looks pretty good. Does it fly well? Quote Link to comment Share on other sites More sharing options...
sparks59 Posted July 12, 2010 Share Posted July 12, 2010 Posted by Barrie Dav 2 on 12/07/2010 10:22:17: Hello Sparks. Welcome to the forum. Your Popsie looks pretty good. Does it fly well? Thanks for your comments. I have flown the Popsie just a few times since completion a couple of weeks ago. So far I'm really impressed with the stable way that she wafts along. Take off's are smooth and steady, even off the fairly soft and uneven desert sand that I fly from. Landings are also really steady, she just floats in with a little bit of throttle on, she'll keep going even when the BEC has kicked in ( need to be careful not to discharge the lipo too much!). So far I have only flown circuits, low fly pasts and banked turns so I can't comment on any potential aerobatic abilities. But, thats not really what the Popsie is about. I'm sure that she'll do fantastic loops, and the 28-20 motor with a 1000mAh 3s lipo provides far more power than she needs, even at 20+ oz. Do you get the feeling I'm really pleased with her? Too true I am! Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted July 12, 2010 Share Posted July 12, 2010 Sparks said..."Landings are also really steady, she just floats in with a little bit of throttle on, she'll keep going even when the BEC has kicked in ( need to be careful not to discharge the lipo too much!)" Those who know me will now cover their ears ARRGH - ITS THE LVC THAT KICKS IN NOT THE BEC Sorry for shouting but this one also yanks my chain Quote Link to comment Share on other sites More sharing options...
sparks59 Posted July 12, 2010 Share Posted July 12, 2010 Posted by Tim Mackey - Administrator on 12/07/2010 12:26:05: Sparks said... "Landings are also really steady, she just floats in with a little bit of throttle on, she'll keep going even when the BEC has kicked in ( need to be careful not to discharge the lipo too much!)" Those who know me will now cover their ears ARRGH - ITS THE LVC THAT KICKS IN NOT THE BEC Sorry for shouting but this one also yanks my chain Sorry Tim, calm down, have a valium. I do know that its the LVC, I just got sidetracked at work whilst trying to post up the reply. Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted July 12, 2010 Share Posted July 12, 2010 Calm down and take a tablet Tim its a leisure hobby, enjoy the mistakes and keep educating us thats what your good at,and why we all need and love you Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted July 12, 2010 Share Posted July 12, 2010 And you taught me how to spell aileron Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted July 12, 2010 Share Posted July 12, 2010 LOL.... only joking boys - hence the winkies Quote Link to comment Share on other sites More sharing options...
sparks59 Posted July 12, 2010 Share Posted July 12, 2010 Posted by Tim Mackey - Administrator on 12/07/2010 13:20:43:LOL.... only joking boys - hence the winkies I was just testing to see if you viewed every post..no really...honestly.... sparks Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted July 12, 2010 Share Posted July 12, 2010 Now you know Quote Link to comment Share on other sites More sharing options...
Bruce Richards Posted July 12, 2010 Author Share Posted July 12, 2010 Sparks thanks for the picture and the comments please feel free to add anything you feel is relevant. Welcome and enjoy. Quote Link to comment Share on other sites More sharing options...
sparks59 Posted July 12, 2010 Share Posted July 12, 2010 Actually, Bruce, I was thinking of posting a 'quasi' sequential build thread, as i did take progress photo's during a lot of the build. Clearly it would not be appropriate to hog this thread, especially as its a 2x specific as it started. But, judging by the availability, low price and popularity of modern arf /rtf planes, maybe there's not sufficient interest in following an old fashioned 'stick & tissue (well ok solarfilm)' classic Smeedmeister, that many members would be bored by. I'd welcome comments from anyone on this. For me, I love building, the torture of covering and the exhilaration of the flight, especially the maiden. It means so much more to me, knowing that I have cut, formed and glued every last piece of it, but i think i'm in a minority group. (and i'm fine with that thought) sparks Quote Link to comment Share on other sites More sharing options...
Bruce Richards Posted July 13, 2010 Author Share Posted July 13, 2010 I think there is a bit of a resurgence in interest in these old timers (well there is in my club) they are so relaxing to fly. It would be great if you could do a thread on your Popsie build it would help me a lot. Quote Link to comment Share on other sites More sharing options...
sparks59 Posted July 13, 2010 Share Posted July 13, 2010 ok Bruce,I'll start a build thread. I'd welcome your/anyone's comments on where to post the thread, here with kits, models and plans, or as I think might be more appropriate, in the builders blog?sparks Quote Link to comment Share on other sites More sharing options...
Bruce Richards Posted July 15, 2010 Author Share Posted July 15, 2010 I have the 2X plan now. It looks big and I will need to extend bu building board a touch by adding a sheet of paster board to the top. Plan on going to Balsa cabin to get some supplies tomorrow. Just about to spend some time lookin over the plan and listing what I need. Quote Link to comment Share on other sites More sharing options...
Bruce Richards Posted July 15, 2010 Author Share Posted July 15, 2010 Is "C" grain balsa sheet for making ribs? Quote Link to comment Share on other sites More sharing options...
Bruce Richards Posted July 15, 2010 Author Share Posted July 15, 2010 When a plan (Popsie) gives a dihedral of say 3 1/2" is that under each wing tip or the total? Quote Link to comment Share on other sites More sharing options...
Mike Rolls Posted July 15, 2010 Share Posted July 15, 2010 Bruce 'C' grain is the best material for ribs. HTGH Mike Quote Link to comment Share on other sites More sharing options...
sparks59 Posted July 15, 2010 Share Posted July 15, 2010 Posted by Bruce Richards - Moderator on 15/07/2010 19:57:38:When a plan (Popsie) gives a dihedral of say 3 1/2" is that under each wing tip or the total? hi Bruce, the 3.5 inch should be under each wing. You can reduce this some from the original F/F design without significant detriment to airworthiness.looking forward to seeing the build log of your X2 spark s Quote Link to comment Share on other sites More sharing options...
sparks59 Posted July 15, 2010 Share Posted July 15, 2010 My , almost stock Popsie has 55mm / 2 1/8th" under each wing tip. So maybe 3.5 will not be far away for your supersize.sparks Quote Link to comment Share on other sites More sharing options...
Bruce Richards Posted July 15, 2010 Author Share Posted July 15, 2010 Oh I was planning to double that 3 1/2" to 7 inches under each wing tip. May be I should think again....... Quote Link to comment Share on other sites More sharing options...
sparks59 Posted July 15, 2010 Share Posted July 15, 2010 Actually Bruce, I reckon 7.5 " is about right I think. You can probably reduce it some more, but, to me, the dihedral at that angle looks about right for a standard wing.sparks Quote Link to comment Share on other sites More sharing options...
sparks59 Posted July 15, 2010 Share Posted July 15, 2010 5.5" would give you around 10 degrees of dihedral each side, if my old slide rule is working correctly. I'm sure someone will have better data than my old memory, but I used to reckon 10 was about the minimum for rudder/elevator models.sparks Quote Link to comment Share on other sites More sharing options...
Bruce Richards Posted July 15, 2010 Author Share Posted July 15, 2010 I quite like the look of the large amount of dihedral so I will stick with my 7" each side. Thanks for the update. Quote Link to comment Share on other sites More sharing options...
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