Peter Miller Posted September 29, 2012 Share Posted September 29, 2012 Looking for something to design and having just lost a favourite model I seemed to suffer from designer's block. Then I thought about another of my favourite models, my old and still serviceable CAP 21. Now I know that this model was popular and so I decided to do the earleir CAP 20L. THis has the advantage that it uses the same fuselage I am lazy! Contruction follows my usual system. Fuselage sides with ply doublers. Pull in the sides at the rear and add the spines. The glue the turtle deck sheet to the sides and leave to dry. Apply water to the outside of the sheets and then heat witha heat gun and bend over and glue and pin in place Edited By Peter Miller on 29/09/2012 11:20:00 Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted September 29, 2012 Author Share Posted September 29, 2012 The wings are built on the board. The lower LE sheet, the trailing eghde sheet, Capstrips under the aielroin spar and aileron leadign edge are pinned down. The spar is glued to the sheet and then the ribs are added. The undercarriage mount is glued to the ribs. The ailleron trailing edge is fitted and the aileron ribs are installed. Note that the lower aileron rib capstips shout fitted to support the ribs. Note that only one wing has the root rib glued in. theother wing does not have the rib fitteing until they have been joined. The Leading edge is glued in place and the various blocks for the hinges and the triangular stock as added to reinforce the undercarriage mount. The lower leading edge sheet is raised and glued to the leading edge. Spar webs can also be fitted now. Detail of undercarriage mount The leading edge sheet can be glued down to one wing at this stage. Quote Link to comment Share on other sites More sharing options...
IanN Posted September 29, 2012 Share Posted September 29, 2012 A far more elegant (imo) looking aircraft than the CAP 21 with those lovely curved wing tips. Also, faired u/c legs were the norm for 20s - a feature not seen on many 21s Great choice! Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted September 29, 2012 Author Share Posted September 29, 2012 Yes, that was one of the main reasns for choosing it. Similar enough to be sure that it would fly well but different enough to be interesting. That is a CAP 20 in your picture, not the 20 L. You can tell by the angle of the rear of the canopy. Also, the wings are slightly longer and even more elliptical at the tips. Edited By Peter Miller on 29/09/2012 12:01:58 Quote Link to comment Share on other sites More sharing options...
Concorde Speedbird Posted September 29, 2012 Share Posted September 29, 2012 Nice! Is this one going to be a free plan? CS Quote Link to comment Share on other sites More sharing options...
IanN Posted September 29, 2012 Share Posted September 29, 2012 Posted by Peter Miller on 29/09/2012 12:00:28: That is a CAP 20 in your picture, not the 20 L. You can tell by the angle of the rear of the canopy. Also, the wings are slightly longer and even more elliptical at the tips. Ah yes, I hadn't noticed that. Good spot. Looks like you'd better get cracking then, Peter. I forsee a demand for a CAP 20 plan as the third model in this series Quote Link to comment Share on other sites More sharing options...
Daniel Cardona Posted September 29, 2012 Share Posted September 29, 2012 it's going to be a winner for sure! are you planning to do the fuselage fairings? regards Daniel Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted September 29, 2012 Author Share Posted September 29, 2012 I expect that it will be a free plan, the CAP 21 was. Don't hold your breath though, there is another of my plans in the editor's in tray first. It will be a long time before I do the CAP 20 but you can easily adapt the 20L to a 20. Yes, I will do the wing fairings, they are very small and look quite simple. So small that I had not really noticed them. Quote Link to comment Share on other sites More sharing options...
Ton van Munsteren Posted September 30, 2012 Share Posted September 30, 2012 Peter , Thats a good choice love those Cap planes but to be honest my favorit is the Cap 10. Great clean build pics by the way. Ton Quote Link to comment Share on other sites More sharing options...
Lee Smalley Posted September 30, 2012 Share Posted September 30, 2012 great choice peter......she is beautiful! Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted September 30, 2012 Author Share Posted September 30, 2012 The CAP 10 is much wider. I might, one day, decide to do a Piel Emeraude. Thanks for the comments on the pictures. Forced into that. Takes an age to set up the "studio" in my bedroom. I have chosen an unusal colour scheme. An Italian aircraft. Also has the advantage that you can fly it without spats if you want to although I will not Quote Link to comment Share on other sites More sharing options...
Ton van Munsteren Posted September 30, 2012 Share Posted September 30, 2012 Yes Peter the Cap 10 is wider and that the thing I like about the Cap 10 and the shape of the wing. You have a good eye for nice planes the Piel Emeraude would also be a great choice. Ton Quote Link to comment Share on other sites More sharing options...
Jimbo565 Posted October 1, 2012 Share Posted October 1, 2012 Peter, I have flown a Piel Emeraude, a friend of mine had a part share in the Emeraude based at Newcastle aero club. Went up twice with him and I had control from just after t/o up the east coast to Alnwick Castle and back to Newcastle,a great experience. The aeroplane was old,.the joy stick looked like a piece of conduit pipe with a rubber bicycle grip and a little red button on top for the radio,chock block connectors hanging from the dashboard. I'll never forget it, it certainly would make a great model Jim Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted October 1, 2012 Author Share Posted October 1, 2012 Hi Jim, Sounds like fun. IT will be a long time before I get round to that one, Quote Link to comment Share on other sites More sharing options...
Daniel Cardona Posted October 1, 2012 Share Posted October 1, 2012 the piel emeraude is a nice subject very similar to the cap 10 which is one of my favorite's too. well maybe one day peter will make us happy...not that he didin't Thanks for these wonderfull subject's pete regards Daniel Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted October 1, 2012 Share Posted October 1, 2012 What size is this one Peter? 40 2st/52 4 st would be nice Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted October 1, 2012 Author Share Posted October 1, 2012 Sorry, it is my favourite engine, the SC .32. a .40 Surpass would be OK. One of the less powerful .40 two strokes would be OK as well. Of course you could go for a more powerful .40 but that would really need you to wear Pampers while flying. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted October 6, 2012 Author Share Posted October 6, 2012 Right, Back again WE start off with my method of building the cowl. The spinner is glued to the cowl front with CA and 1/16" spacers. This works especially well with cowls that match the spinner. THen I glue in the balsa betwen F-1 and the front of the cowl, The engine is removed and the cowl carved to shape. The apple cheeks are added and shaped and blended to match. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted October 6, 2012 Author Share Posted October 6, 2012 One wing is completed including the LE sheet. It is then liftted frcom the board. This makes sure that it cannot warp once removed from the board. The other wing is left pinned down and the completed wing is joined to it at the correct dihedral angle. Only then is R-1 fitted to the the second wing. Showing R-1 being fitted Once the wings have been joined the sheet can be added to the second wing before it is lifted off the board. The centre section sheet is now added. Edited By Peter Miller on 06/10/2012 11:40:47 Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted October 6, 2012 Author Share Posted October 6, 2012 use a central servo and bellcranks out in the wings. This keeps the weight away from the tips. It will improve precision rolls and four point rolls. At least, it will for better pilots than myself! Here is a tip for cutting neat radii in the centre section sheet. Use a sharp circle cutter. The tails parts are pretty simple. However I use a cutting disc to make a recess in the horn balance and add lead as amass balance. This prevents flutter. The rudder is huge and it is important. The other job is the spats and undercarriage. The spats are built from balsa with ply at the wheel position. They are held to the legs with brass saddle clamps whih are soldered to the legs. They will be faired to the legs with David's Isopon or similar body filler Edited By Peter Miller on 06/10/2012 11:51:00 Quote Link to comment Share on other sites More sharing options...
bouncebounce crunch Posted October 6, 2012 Share Posted October 6, 2012 good on ya Pete, you just had to show the riff raff how to make wheel spats/pants, now what do i talk about at the pub after the second lager? Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted October 6, 2012 Author Share Posted October 6, 2012 Posted by bouncebouncecrunch on 06/10/2012 11:56:23: good on ya Pete, you just had to show the riff raff how to make wheel spats/pants, now what do i talk about at the pub after the second lager? Mass balancing of control surfaces? Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted October 21, 2012 Author Share Posted October 21, 2012 Been a bit slow in updating this blog. Two shots of the aileron controls. Withe the ailerons still attached to the wing I temporarily install the horns and pushrods so the everything is set up. They are then removed and the model is covered. The aileron servo is mounted using Radio Active Servo Mounting Brackets. Note that the servo will be clamped down and there will be a swing in keeper on the aileron connection. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted October 21, 2012 Author Share Posted October 21, 2012 Yesterday Was nearly perfect, just alack of blue sky. However a few of us got together on the field and I was able to test fly the CAP 20L Colour scheme is taken from a CAP 20L belonging to an Italian club. I knew that the model would be nice because it is so similar to my CAP 21. However I think it is even better in some ways. Rock solid in flight, especially in inverted flight. Does lovely axial rolls. Does the sharpest, most positive four point rolls that I have ever done with instanyt start and stop. Does nice square loops, haven't tried square loops with quarter rolls yet. Great for knife edge but I must practice as she keeps climbing in knife edge. Stall is a total non event, refuses to dropa wing however brutal one is. Spins, both upright and inverted are great and she stops instantly. Takes offs are smooth. Landings great I now have another favourite. Quote Link to comment Share on other sites More sharing options...
Jimbo565 Posted October 21, 2012 Share Posted October 21, 2012 Peter She looks great,looks like I'll have to give this one a wizz when the plan comes out. JIm Quote Link to comment Share on other sites More sharing options...
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