Howard Heffer

Peter,  Thanks for the pics, I think they have helped me re-evaluate some of my interpretations of the plans. Firstly for some reason I had decided there were going to be two servos - one for each aileron.  Clearly not the case as its not necessary!  I have placed my mini servo in half of the bay servo bay (I have only built one wing so far - must be the slowest builder ever!) and it looks to me as if the servo arm sits proud of the wing profile - into the fuselage belly.  Is this correct - I cannot see from the top down image you posted?  Also, how is the wings leading edge affixed to the fuselage?  I can see the wing bolts to hold the trailing edge in but there appears to be nothing at the front? 

Hi,  A question for Peter:  You mentioned taking many contruction pictures that the magazine did not use.  I have just pick up building my wings again and need a little visual help understanding how all the gubbins fits in the wing servo bays.  Do you have any photos of this area and if so are you able to email me so I can see exactly how and where the servos are mounted, what type of servo control horns are used and how the servo bay has been constructed.  If you can please message me for my email. Or post them on the thread!  Its not that your plans arent detailed enough - more that I'm not confident enough in my interpretation of them.  Dont wanna screw things up after all my hard work! Also, what size aileron control horns should be used? Radio Active Large or Small? Thanks!

Hi guys. Just wondering Peter, What is the "3/32"rolled sheet" that your refer to for covering the top of the fuselage? Is this a special type of balsa sheet? Also have you got any hints for shaping the trailing edge so that I get an accurate and consistant shape along the entire length of a standard peice of trailing edge stock?  I was thinking of using two peices of 1-1/2" * 3/8" * 36" trailing edge stock from balsamart (http://balsamart.co.uk/upgrade/index.php?main_page=product_info&cPath=46_72&products_id=233)  Is this the easiest way to make it or am I missing something!  Really enjoying making your plan though albeit very slowly!! So thanks!

Cool, well I will look for a .32 electric equivalent.  Initial research suggests something in the region of 450W.  More Research Required.  I see now how the servos are mounted, which servos do you use peter? good enough for you, good enough for me! I had another little look at the plans, and I notice at this late stage that the rear of the wing from about R3 - R11 is only covered by the heat shrink covering and not balsa as well.   Am I correct in my discovery?  This seems to lie quite well with the fact that these are the only ribs with cap strips!!

Hi Chaps. Wow loving this thread, really is quite diverse. I have a few questions about your plan though Peter!  I am currently making my first wing, and have a few question about the aileron servo mounting bays.  I see that your have created a small bay/box out of 2 sections of 1/8" Balsa.  The forward bay wall is clearly made from the dihedral brace and the fuselage wall is non-existant due to the cutaway R1 fomer.   My question is about the 1/8" Liteply servo mount.  Is this placed on top of the bay walls so that the servo drops through a hole in the mounting plate, or is the servo mounted in some other way?  It mentions radio active servo mounts are used, but radio active make man servo mounts - perhaps you could supply a direct link the the mounting you recommend.  This would probably explain my query!  All in all though, I have very much enjoyed making the model while I have had the flu! And to yourself and any of the other readers, I would like to run this as an electric setup.  Perhaps some of you may give me some ideas as the the sort of components I will need to achieve similar performance of an SC25 engine in electric format.   makes and models of motors and electronics would be appreciated.  Also any recommendation on servos would be appreciated!  Many thanks  Howard

Oh, and the thread so far has been awesome! V helpful chaps!

So *watch* this thread I meant!

Interesting stuff guys. If I was and less laid back I think I might consider buying a plan to reduce the likelyhood of it having errors but I think I'm gonna go along with it as if I do find any little tweaks needed or problems it will be a great learning curve to see what effect these might have. In short I will enjoy the challenge! I dont have any experience in office drawing or design but I have a lot of patience and an engineering brain so combined I might be able to work something out. If not, I always have a forum full of experts to help if need be! So what this thread guys!

Haha, yes I'll make sure I have the thing the right way up before I put it all together. Thanks for the heads up tho, thats just the sort of stupid thing I would go and do by mistake!

Ok then as simple as that huh!? A small snippet of genius me thinks! I was expecting a precision way of doing this but if you can get away with a hand copied drawing then I'm all for it! Thanks for the idea; I will go away, drink something to steady the hands and give it a go!

K, heres a stupid plan for you. All the plans I ever used have had both wings printed on them? Any tips for duplicating a mirror image of the right wing? A3 photo copier isnt big enough?! Cheers!

Thanks for so much information. It just what the magazine article left out! I have just bought my own hinge cutter so this should make things much easier for me. I have also been looking for the hinges you mention you used for your ailerons, but I'm not sure which ones exactly you meant - "I use the flat one piece nylon barbed type hinges made by Radio Active". Can you tell me where to buy these online??? I'm also trying to find some Leading edge, trailing edge and Aileron Shaped balsa strips, but am having trouble locating an online retailer. My local model shop does not seem to supply these items. Have you any idea of where I can buy these items online?? Thanks!

Ah yes now i have checkd the plans again and done some trig, it seems the the dihedral of each wing is only 1.62 degrees - not a great deal at all. Another question if i may. The aileron hinges on the plans appear to be dotted lines - is he giving the builder discretion over what type of hinge to use? Would mylar hinges be suitable, or would a pin type be better? And as for the elevator hinges?!? is this what is meant by the 14swg joiner? Thanks for the input!

thanks for the answers, just goes to show you have to have an eye for details. I understand what you have said and will check the plan out again tonight to put your word into images! Thanks again!

HI Folks. Just got back into modelling after 10 years or so hence I am a bit rusty. After reading this months RCM&E mag I've decided to give the CAP 21 plans included in the mag a go. I'm having trouble understanding how the dihedral of the wings allows a flat peice of ply (called the Undercarriage mount on these plans)to be joined from (left wing) Ribs R2-->R1<-to->R1-->R2 Ribs (right wing). Surely the dihedral of the wing is centered between the 2 R1 ribs meaning that when the wings are joined together and balanced (3/4" under each wing tip) there is no flat/straight section for this plywood UC mount to fit?? Also to allow for the dihedral, will the R1 ribs have to be angled away from vertical so they join flush with each other. This is how my old glider worked, but it is not mentioned in these plans. Thanks for the help, I hope you guys understand my muddled question!