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Hi again all, progress has been patchy as usual, and the olympics on the idiot box didn't help either.
So far, happy with the results on my OlyIII, which is saying something due to the constant see-sawing humidity that old murphy decided to give me since the start of the build. Plus life has conveniently got in the way too, but with I won't go into that. The next thing was to hinge the flaps, the solartex iron-on hinging material has worked well. ![]() ![]() Then it was onto the outer wing panel build, here we was, having a beer (or two) while tapering the sheer webs before gluing assembly ![]() The tender job of glueing and setting the wing panels... breath holding time.. ![]() ![]() Checking alignment allround, looking good so far touch wood, there looks to be no real unplanned wash in the Oly skeleton, for someone like me that hasn't built a large woody for a while, its an moment. ![]() That being the case... phew... time to assign the D sheeting, but not before taking the time to shape the ribs to make a consistent LE line and rib top with 320 grade sandpaper. ![]() Then it was the leading edges of the outer panels, and other general farting around and fussing. Here are some pics of the unfinished build. Basically all the little woody parts have been assembled and very roughly finished. ![]() So whats left now is assesing things like alignments and angle of incidence (the tailplanes are taped on in these pics) finishing the forming of the surfaces, then filming using my garish fluro green and transparent violet and yellow film mixture. Not looking forward to the covering, but really going to enjoy finishing her off with sandpaper, always loved that part of wood aeromodelling, getting as nice and as slippery a surface as is sensibly possible None of this is as simple as the pics and my words might convey. While being an uncomplicated build overall in terms of components, I've found the Oly III to be a bit more challenging in terms of your planning and consideration to its assembly. It does suit model builders of all experience levels IMHO, but only if they have a good grasp of the principles, both in construction accuracy and resulting aerodynamics, the plans are not comprehensive but thats ok if you know what you want to do, but all the essential info is there, plus heaps of support if needed. ![]() ![]() This used to be a kitchen! ![]() I recommend building on your kitchen bench. Food, music, and entertainment are close at hand, and there is no cold walk inside and out if your workshop is outside the house. Cheers for reading.
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Quote:
Thanks Wylie. |
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United States, IN, Fort Wayne
Joined Apr 2003
1,411 Posts
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Now isn't that beautiful, the birth of the Holy OLY lll, sorry couldn't resist.
Here is a caution on the use of flaps as a thermalling aide, their is a learning curve to overcome the tendancy to drop the flaps too much. An 1/8 of an inch can be excessive when working light lift, down flaps are all about drag, a slight amount of negative flaps are all about reducing drag. Looks like your doing a great job and enjoying the build. Ray http://www.skybench.com Home of Wood Crafters |
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Thanks Ray, trying my best to build her straight and true. There's always an uncertainty on how a new model will react when flown, and thats quite a bit of flap I have there, thanks too for the thermalling tip. This will be my first (proper) large thermaller that has flaps, in the past used only spoilers if needed.
I am letting the spoilers go for now just to see how accurately I can pin a landing with or without flaps, and to save weight, retro fitting spoilers isn't a hard job. Can't wait to see her take to the air, but have to be patient. |
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United States, IN, Fort Wayne
Joined Apr 2003
1,411 Posts
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I fly my Challenger with flaps that have a much smaller root then what you created and they are very effective. Set the flap coupling with the stab to allow a bit of down flap before the stab is accuated if you decide not use a coupling on-off switch. A very good pilot has flown his Challenger as an RES ( has system to lock the flaps to pass the RES contest director inspection )and prefers not using the flaps. I like to fly my Challenger with the flaps raised 3/32 " to increase the speed.
So your into a whole new ball game with flaps. But for landing purposes they are superior to spoilers only: .... after many serious ... lengthy practice and coupling setting sessions ... Maybe a years worth of flying in all conditions to really get on to them for landing and thermalling. And then you could also experiement with a flaperon setting. Adding a photo ( not very good ) I took during our Vacation of a flock of White Pelicans ... their wings are 3 Meters. Ray http://www.skybench.com Home of Wood Crafters |
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Thats a great photo Ray, I'm often soaring with pelicans here on the coast, pelicans don't like planes to much it turns out, Aussie ones at least. I always knew I wanted to get back into RC thermalling, all my life I just have to stop and observe any thermalling birds I come across, which is most often when travelling along some road. Sometimes around these parts we get Brolga's and Jabiru's using lift off the blacktop, an awesome sight.
I'm hoping the years I've spent flying some of my power and slope planes that had flaps might be a help, but generally in the past I didn't bother using even spoilers to much when doing a TD event with the slower wood thermallers, but that was back in more innocent times. So I'm really looking forward to this, should be something new to learn for sure. My multiplex radio handles flap mixes, it will take me a little time and a good number of launches to find sweet spots. As you mentioned, the glider could still be elligable for a res event with only a few minutes work. |
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