Bob Webster Posted December 2, 2009 Author Share Posted December 2, 2009 Underside capstrips added. Chunk of 1/2" balsa ready for sanding to shape for centre section of leading edge. Going to have to move the belt sander for this so that I can get the vacuum cleaner connected. I think that there will be a serious amount of dust! Bob Quote Link to comment Share on other sites More sharing options...
Bob Webster Posted December 3, 2009 Author Share Posted December 3, 2009 Having connected up the vacuum cleaner, I didn't notice any dust at all! Going to be a delay on the wing now - I've run out of 1/4" sheet balsa. Oh dear, I'll have to visit a model shop - what a hardship. Well it is really, there hasn't been a full blown aeromodelling model shop in this area for several years now. Serves us right for all the mail order bargains we picked up, especially when the net appeared. Not to worry, I can start on the ailerons and flaps. The rib spacing of about 2" on this wing means that I'll have to buy some low profile servos. Standard servos would be just too tight. Hitec HS77's look to favourite for this job - 4.4kg at 4.8V. Bob Quote Link to comment Share on other sites More sharing options...
Jimbo565 Posted December 3, 2009 Share Posted December 3, 2009 Bob, Why not place a standard servo on its side inbetween the ribs with the arm sticking up vertically. Should be plenty of room to lie it down,better than splashing cash. Jim Quote Link to comment Share on other sites More sharing options...
Jimbo565 Posted December 3, 2009 Share Posted December 3, 2009 Bob, Something like this Quote Link to comment Share on other sites More sharing options...
Bob Webster Posted December 3, 2009 Author Share Posted December 3, 2009 Now that's an interesting idea. I'll have a look at it in situ. I wasn't going to buy servos till next year anyway but I'll have to buy 4 servos for the model anyway. Jim, if that's your building area, it puts me to shame! I tend to work in a midden! Bob Quote Link to comment Share on other sites More sharing options...
Bob Webster Posted December 8, 2009 Author Share Posted December 8, 2009 Ground to a halt just now. Starting to look at the flaps and ailerons. Cutting out was easy but getting the angle on to the leading edges is not going to be so easy. Thinking cap is being strained here - been thinking about it since Sunday! More thinking and some action this evening. Bob Quote Link to comment Share on other sites More sharing options...
Jimbo565 Posted December 8, 2009 Share Posted December 8, 2009 Bob, Its not easy,I lost some sleep over this one ,your trying to get inside the designers head and keep coming with Why did he do it like that ?? Just wait till you have to align the surfaces, valium and prozac come to mind. still watching. Jim Quote Link to comment Share on other sites More sharing options...
Bob Webster Posted December 9, 2009 Author Share Posted December 9, 2009 Evening action involved secretarial work for Buchan Aeromodellers. But today. . . . One flap built - not the easiest jobs I have ever done. I don't like the idea of just 2 hinges on the flaps - I think the flaps at nearly half a metre long are far too long for 2 hinges. I am thinking about balsa pods below the wing and flaps for Robart hinge points. Coffee now and cap strips after coffee. Cheers Bob Quote Link to comment Share on other sites More sharing options...
Bob Webster Posted December 9, 2009 Author Share Posted December 9, 2009 Ah well that's 2 pieces of hangar rash onto this model already. Chipped the trailing edg of the wing - going to be a nasty fill job. Dropped the 12" sanding block onto the flap - needless to say it landed corner first and so filler will be needed. I love modelling, it's so relaxing! Not to worry, one flap complete except for hinge blocks and it looks as though it might even line up with the wing. Bob Quote Link to comment Share on other sites More sharing options...
Jimbo565 Posted December 9, 2009 Share Posted December 9, 2009 Bob,If you make it as per plan, the way the hinges are two are fine,pivot on 8ba bolt at each end and it works well, getting em lined up is the problem. Jim Quote Link to comment Share on other sites More sharing options...
kc Posted December 13, 2009 Share Posted December 13, 2009 Hanger rash. If the balsa is just crushed the oldest trick in the book might work better than filler. Just a drip of water right in the dent will usually expand the wood back overnight. Might need doing a couple of times. Quote Link to comment Share on other sites More sharing options...
Bob Webster Posted December 15, 2009 Author Share Posted December 15, 2009 The TE was an easy reapair - a balsa sliver sanded and cyanoed into place. The dent is into soft balsa and didn't come up with water. Now filled, ready for the next bit of damage. Nearly happened this afternoon when a piece of 6g piano wire tried to insert itself into the wing. Replaced into proper place for now! Flaps completed along with hinge blocks and Robart hinge points. Lined up quite well. A little fettling will be needed to get the slot exactly right. Not looking forward to the ailerons - might give them a miss for just now and build the tailplane. Bob Quote Link to comment Share on other sites More sharing options...
Bob Webster Posted December 16, 2009 Author Share Posted December 16, 2009 Started tailplane today. I had already decided that I would not try to build it the way shown on the plan. Just as well. The tail ribs are drawn at sixes and sevens, TE not even the size written on the plan. How you can shape ribs in situ from straight pieces of balsa, I do not know. I am using the central core method with half ribs sanded to shape with a 1/8" false leading edge. This will allow one side to be sheeted and then the othe side can be built into place and there will be a firm surface for sanding the other halves of the ribs. I can then fit a 1/4" leading edge and sand that to shape. Core cut and marked out with TE, false LE and ribs fitted. Ribs sanded to shape and ready for hinge blocks and sheeting hopefully tomorrow. Bob Quote Link to comment Share on other sites More sharing options...
Bob Webster Posted December 17, 2009 Author Share Posted December 17, 2009 First side of tailplane sheeted and pinned to the building board. I cut out the elevator halves while leaving the tailplane to dry. No size given for the LE of the elevators and so this is something else to work out. a bit of care will be needed here to allow for the shroud formed by the TE of the sheeting. Cut out the elevator ends to laminate these. Dog-sitting this evening so no more building today. Bob Quote Link to comment Share on other sites More sharing options...
Bob Webster Posted December 18, 2009 Author Share Posted December 18, 2009 Before sheeting the first side of the tailplane I copied the ribs to reduce the amount of sanding needed. It did make life very easy when building the frame of the second side onto the core. Second side was also easier to sheet since I was able to use clamps and masking tape and so there are only 2 pinholes. Once it has set I'll be able to work out a size for the elevator LE's.Bob Quote Link to comment Share on other sites More sharing options...
Bob Webster Posted December 31, 2009 Author Share Posted December 31, 2009 Hopefully this white stuff that's covering the ground will disappear eventually. Getting out to the shed has been a problem with the path covered in a layer of sheet ice. Maybe it'll clear sometime in 2010! Meanwhile "A Guid New Year tae Yin and Awe" Bob W Quote Link to comment Share on other sites More sharing options...
barry saint Posted July 28, 2012 Share Posted July 28, 2012 Hi jim Clearing out my plans & came across chipmunk plan+june 84 radio modeller,might have a go at when i find time,can you remember where canopy&cowl come from. cheers barry Quote Link to comment Share on other sites More sharing options...
kc Posted July 29, 2012 Share Posted July 29, 2012 It seems MyHobbyStores supply the cowl & canopy for £16.45 under the number SETRM276. Note what I mentioned earlier - a clubmate built one and said there were some errors on plan- I cannot remember now but it might have been the two wing panels differed, so check before you start! Quote Link to comment Share on other sites More sharing options...
Jimbo565 Posted July 29, 2012 Share Posted July 29, 2012 Barry, As KC says the gear is avaliable from MHS. Hope Little Toot is still OK JIm Quote Link to comment Share on other sites More sharing options...
barry saint Posted August 5, 2012 Share Posted August 5, 2012 Jim Yes toot still flying okay had app 35 flights now ,no probs,i aquired an old toot of bert baker i fitted my spare s/t 75 flew about same as my laser 90 powered one,sadly it came to grief on its 6th flight,traced prob to loose crystal holder on my field force six tx. Have just finished a zlin 50 akrobat fitted my laser 100 just waiting to test fly when weather & time allow,as i am converting my garage for building as i am running out of space rapidly since i retired 3 yrs ago &can,t stop building. Barry. Quote Link to comment Share on other sites More sharing options...
barry saint Posted August 5, 2012 Share Posted August 5, 2012 Pic of my Zlin 526 from sig kit from 1970 & Balsa usa Taube also laser 100 powered Quote Link to comment Share on other sites More sharing options...
Jimbo565 Posted August 5, 2012 Share Posted August 5, 2012 Barry The models look great,pity about one of the Toots, I.m the same regarding building,got to keep at it or the little grey cells will stop working. Stay cool jim Quote Link to comment Share on other sites More sharing options...
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