bexrbetter Posted May 10, 2017 Author Share Posted May 10, 2017 all those connections are just more things that can go wrong and I for one would not want something to drop off in a wing during flight, Every time a plane crashes in the news and someone dies, my azz cheeks tighten a little thinking what if in the future that's one of my planes. I go to extreme lengths to make sure that risk of component failure is zero, and if it does, that there is redundancy. If you're happy with cable brackets that your 10 year old neighbor kid made for you and clevis pins at the aileron, that's great, you are responsible only for yourself, I will be responsible for other people's lives. It doesn't matter how long a chain is, it only takes one link to break. 2 1 Link to comment Share on other sites More sharing options...
ClintonB Posted May 10, 2017 Share Posted May 10, 2017 This plane stuff is tricky. You have to think 5 steps ahead, what happens if I do this?, if it breaks what happens? I am putting a trim tab in a plane that did not have one to start with and its already been back to the think tank a few times. I like that all the thinking is being done by someone else on this one. 1 1 Link to comment Share on other sites More sharing options...
AussieB1rd Posted May 10, 2017 Share Posted May 10, 2017 I am putting a trim tab in a plane that did not have one to start with Want to start a thread or keep us up todate on the trim tab install ClintonB, sure be interested to see with some notes and pics, have been pondering this one myself. Link to comment Share on other sites More sharing options...
bexrbetter Posted May 10, 2017 Author Share Posted May 10, 2017 So this is the roughed out version using SCRAP RUBBISH laying around the shop, that includes the tubing. NOT indicative of the final product, just using it to measure throw, angles and clearances. After this, I modified the action a little, very happy with the differential action, and tomorrow I will make a decent looking, smaller and lighter unit closer to what will be used. 4 Link to comment Share on other sites More sharing options...
geoffreywh Posted May 10, 2017 Share Posted May 10, 2017 nice, low friction,light weight. Those teleflex cables should stay on boats. 3 Link to comment Share on other sites More sharing options...
Blueadventures Posted May 11, 2017 Share Posted May 11, 2017 nice, low friction,light weight. Those teleflex cables should stay on boats. I personnally agree absolutely. I saw a none genuine cable fitted to a tug that broke without warning. Outer run fitup was better than spec for radius of bends and support etc. Metallography testing of the inner s/s wire that broke showed a high copper content that contributed to the failure. Whenever these are used I you should never replace with any other non-genuine cable other than the manufactures item or another approved item. Link to comment Share on other sites More sharing options...
bexrbetter Posted May 11, 2017 Author Share Posted May 11, 2017 Just to verify that i have played with them, and as I said, I still haven't ruled out using them from the stick to the bellcrank, running a pretty straight line. 1 Link to comment Share on other sites More sharing options...
bexrbetter Posted May 11, 2017 Author Share Posted May 11, 2017 So today bellcranks that are leaner, meaner that I named "Katrina". Because "Bob" didn't rhyme. 3 Link to comment Share on other sites More sharing options...
Marty_d Posted May 11, 2017 Share Posted May 11, 2017 Because "Bob" didn't rhyme. "Katrina the Bellcrank"... nah... doesn't rhyme either. Maybe call her "Mel Banks". 1 1 Link to comment Share on other sites More sharing options...
AllanBendigo Posted May 11, 2017 Share Posted May 11, 2017 Hi Bex It appears from the video that the arm from the bell crank to the aileron is outside the bottom wing skin is that correct? Cheers 1 Link to comment Share on other sites More sharing options...
bexrbetter Posted May 11, 2017 Author Share Posted May 11, 2017 Hi Bex Not yet. It appears from the video that the arm from the bell crank to the aileron is outside the bottom wing skin is that correct? Link to comment Share on other sites More sharing options...
bexrbetter Posted May 12, 2017 Author Share Posted May 12, 2017 So today's efforts. First a new Aileron quadrant to tie in with the final bellcrank layout, and a little bit of effort into getting weight out of it. Now, good news for some of the lazy, useless, indolent, apathetic, inert, languorous, lethargic, listless, sleepy, sluggish, torpid sods out there who don't want to drill holes. Because of the work on the bellcrank, I damaged the adjoining number 6 rib, so had to make a new one. I spent a whole 20 minutes of my incredibly precious time for you mentioned above, working out how to perfect matched holes for the non-linear curve to suit the pre-formed rib flange. The parts arrived on my bench and it took me 2 minutes and 7 seconds to assemble it including stopping to have a swig from my bottle of drink (true story). So as some of you requested, I present: matched hole ribs ... The finish is superb, far better than the hand drilled, damn you to hell Laser Beam, the Arch Enemy of Luddites the World over! 8 1 Link to comment Share on other sites More sharing options...
fly_tornado Posted May 12, 2017 Share Posted May 12, 2017 *adding a lot of weight for no real benefit Link to comment Share on other sites More sharing options...
Old Koreelah Posted May 13, 2017 Share Posted May 13, 2017 Nice work Bex. Forgive me if this has been covered (I haven't followed this thread closely) but wouldn't your ribs be stronger if the big holes were pressed out, leaving curved edges? 2 Link to comment Share on other sites More sharing options...
Marty_d Posted May 13, 2017 Share Posted May 13, 2017 Nice work Bex. Forgive me if this has been covered (I haven't followed this thread closely) but wouldn't your ribs be stronger if the big holes were pressed out, leaving curved edges? Flanged. Yes I wondered that too. A quick process and adds strength with no extra weight. Link to comment Share on other sites More sharing options...
bexrbetter Posted May 13, 2017 Author Share Posted May 13, 2017 Nice work Bex. Forgive me if this has been covered (I haven't followed this thread closely) but wouldn't your ribs be stronger if the big holes were pressed out, leaving curved edges? They are not final and are not been flanged because they may be moved or changed in size yet. If you notice this new rib has a rather oval hole now to give more clearance to the bellcrank, and number 1 through 5 all need that same hole moved closer to the spar for the main Aileron actuating link. Currently everything you see that you see is not what you see, you see. Si. I'm not sure that in overall terms the extra stiffness of the flange is of any value, they would however go a long way to stopping tearing from the edges of the holes . Suppose I'll have to do the flanges as well for you lazy feckless lot too. 2 Link to comment Share on other sites More sharing options...
SDQDI Posted May 13, 2017 Share Posted May 13, 2017 The trouble is, without the flanges it is a flat flat pack flanges will increase package size by a smidge! I think I mentioned earlier that I love the idea of the riveted on edge especially for the flat package aspect. Link to comment Share on other sites More sharing options...
Marty_d Posted May 13, 2017 Share Posted May 13, 2017 I like the idea of the riveted edge too, especially for tapered wings. Makes a lot of sense. Doesn't mean that flanging the ribs isn't also a good idea though. Yes it may take up another 50mm or so in packing, I reckon it's worth it. 1 Link to comment Share on other sites More sharing options...
bexrbetter Posted May 13, 2017 Author Share Posted May 13, 2017 Because of a well thought out complete system, I was quite pleased with myself that my 'clever hidden' counterweight system not only worked as planned, but relies on about 1 kg rather than the 2 or 3kgs that many other craft use per side. I'll show you and explain when it's all properly finished, but today I temporarily tested the setup using some lead for weight gotten from a local fishing shop melted into a mold (not the final method). Here's a shot of my temporary industrial foundry I set up today, and the most critical tip I can give to homebuilders: Wait until the Wife goes out! ... I also believe my system is superior to this guy's 3kgs of lead shot in a bucket hanging on a rope, imagine the drag on it! He could at least put low drag aero tubing over the ropes ... 3 3 Link to comment Share on other sites More sharing options...
bexrbetter Posted May 14, 2017 Author Share Posted May 14, 2017 And just right .... https://www.youtube.com/watch?v=3RyCB77USV4 2 Link to comment Share on other sites More sharing options...
Marty_d Posted May 14, 2017 Share Posted May 14, 2017 Apparently the video is private. Have you mistakenly uploaded one from your... er... private collection? Link to comment Share on other sites More sharing options...
bexrbetter Posted May 14, 2017 Author Share Posted May 14, 2017 Apparently the video is private. Have you mistakenly uploaded one from your... er... private collection? Oh sorry, that was the Nuns, the Squirrel and the Donkey. https://www.youtube.com/watch?v=3RyCB77USV4 1 1 Link to comment Share on other sites More sharing options...
geoffreywh Posted May 14, 2017 Share Posted May 14, 2017 Nice and free! But very noisy Link to comment Share on other sites More sharing options...
bexrbetter Posted May 15, 2017 Author Share Posted May 15, 2017 Nice and free! But very noisy That's that damn Squirrel. 1 Link to comment Share on other sites More sharing options...
Marty_d Posted May 15, 2017 Share Posted May 15, 2017 Oh sorry, that was the Nuns, the Squirrel and the Donkey. https://www.youtube.com/watch?v=3RyCB77USV4Never thought I'd say this Bex... but you seem to be well balanced! 1 Link to comment Share on other sites More sharing options...
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