ntsmith
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Everything posted by ntsmith
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The rather large flap area is very similar to the current 3D planes but the theory was that only very slight deflections needed to be used. From there the theory eludes me! @import url(/CuteEditor_Files/public_forums.css);
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Here is a picture of the rather fragile looking tips! @import url(http://www.modelflying.co.uk/CuteEditor_Files/Style/SyntaxHighlighter.css);@import url(/CuteEditor_Files/public_forums.css);
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Finaly the wing is almost complete but one thing I am unhappy about is the design of the wingtips; just asking to be broken. The advantage is that having the tips go to the edge of the aileron gives the ability to check on the ailerons center. Its disadvantage is as I said in that it is very easily broken. I'm staying with the original design for the moment! The best thing today is that the U/C was bent. I tried it first in 10swg but the length of the leg means it can flex rather alot so I redid it in 8swg. @import url(http://www.modelflying.co.uk/CuteEditor_Files/Style/SyntaxHighlighter.css);@import url(/CuteEditor_Files/public_forums.css);
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The equivalent engine to the SC 52 is the ASP 0.52 S available from "Just Engines" http://www.justengines.co.uk/acatalog/ASP.html You could use a 46 which would imho be even more appropriate but the 52 will certainly give an unlimited vertical performance. Its horses for courses really. The ASP's always seem to be much easier to run in and smoother in operation and ofcourse you can get it from one of the best (if not the best) engine supplier. I believe they even have a running in service. (And no I dont get commision from them! They are just great!)
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Another name to look for is Oracover which I believe is a synonym for Profilm. My last threee models I have used Solarfilm which is slightly lighter but not so strong and does not tolerate an iron with an accidently excessive high temperature (We have all done it!) I do find I can get Solarfil round compound curves better though. My next model I will certainly revert to Profilm (Oracover) BTW always do a heat check by placing a small piece on to the iron and seeing its reaction. If it goes up in flames in was too hot - only joking. Have fun.
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The wing has had the dowels positioned but not finally fitted as its far easier to shape and sand and cover before finally being glued in position. There will also need to be a fibreglass bandage around the centre as this provides a great deal of reinforcement. I must admit the alignment and drilling of the front dowels went far more easier than I anticipated. I considered the two bolt retention system but because of the centre geometry it wasn't the best method so one bolt it will be but with a plywood brace across the wing where the bold will fit to spread the stress. I am now fitting the engine, elevator and rudder servos in before fitting the rear bolt cross-member so I can ensure there is no fowling of the push rods. The wing has its sheeting completed and the wing tip pieces added.@import url(/CuteEditor_Files/public_forums.css);
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The underside of the wing now sheeted. The nice thing about this will be when the ailerons and flaps are separated they will not need "edging" as all the sparts were incorporated in the initial part of the basic wing structure. There will be another servo to go in the centre for the wheel brakes.
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The plan doesnt call for a tailplane mount but I fitted one anyway. It gives something for the tailplane to be glued to. The front of the fuz has a hatch for the fuel tank area. This was because Phil always liked to be able to check the fuel lines were not kinked. and all was well with the fuel system. It was supposed to be carved from block but mine is going to have a ply base and then turtle deck the 3/16" sheet over it. Ofcourse one bolt just happend to end up in the worst place ! The area behind the wing and indeed above the wing is the week spot, hence the ply triplers that were inserted in this area. The sheeting (again 3/16") adds alot of strength where it is needed here. For all the benefits of a mid wing design versus this week spot I think I would go for the low wing choice. But, this isnt my design and I am looking forward to seeing this out as the design was intended. Another thing that I found not necessary but didnt change is the huge size of the control surfaces on the wing. It certainly will be interesting flying this set up.
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Any 9g servo will do. I get mine from BRC
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Posted by jeff2wings on 23/11/2011 20:09:06: That’s a beautiful build your doing there , bravo ! and nice to see one of these earlier r/c models that have a charm of their own . I think P.K. used a Enya 61 II , both his Kwik-Fli & Bar-Fli did so the Slik-Fli may have to , I have the November 1969 issue of R.C.M&E with the build article can scan it for you if needed ,you are going to paint it orange aren’t you ? Not sure if that is the issue I have. It certainly would be nice as the one I do have is rather uninteligable anyway. I couldnt get the Enya which I think was usualy chosen due the to short crankcase. Using the Kraft mounting method I can just squeeze in the SC61 (not quite so reliable but possibly as powerful as the enya) by moving F! back 1/4 of an inch or so which still gives loads of room for the fuel tank. The color will be either Orange or Red - the latter being better for visibility. These dont hang around compared to the latest breed so its quite an important consideration. Thanks for the compliments
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The fuselage is relatively straight forward. Here I have added the rear stringers and now have the infill to do. The lower surface sheeting is complete and the four wing servos are screwed, albeit temporarily, in place. There will be one more which will sit in the middle to operate the mechanical brakes on the main wheels.
