D for Donald Posted February 23, 2013 Share Posted February 23, 2013 Hello Gary, It would seem that Worden, Andy Horseman and self all moved the COG forward between 1 and 2 cm. You are unlikely to find problems moving it forward at these extents but my advice is on no account move it back from the plan point. Personally, I would start at 1.5 to 2cm forward and experiment from there. Quote Link to comment Share on other sites More sharing options...
Gary Vinten 1 Posted February 23, 2013 Share Posted February 23, 2013 Hi Paul Thanks for the advise will start were you guys have . Quote Link to comment Share on other sites More sharing options...
Gary Vinten 1 Posted February 23, 2013 Share Posted February 23, 2013 My Slinky will be electric with film covered surfaces .As it will be electric iam sure i can get the GC forward using the lipo Gary Quote Link to comment Share on other sites More sharing options...
Andy Horsman Posted February 23, 2013 Share Posted February 23, 2013 Gary, great to read that another "e" version is being built. On my depron version the 2200 mAh 3s pack sits snug against the vertical former F2 which is 14mm in front of the wing's leading edge Are you building to plan i.e. fully built up out of balsa and ply with film covering and what motor and lipo are you planning? I ask because you may need to open up the F2 to allow your chosen pack to come forward if using a lighter motor than the I.C. version. Andy Quote Link to comment Share on other sites More sharing options...
Andy Horsman Posted February 23, 2013 Share Posted February 23, 2013 I've added some depron covers for the u/c legs. Need to rethink method of attaching as the hot glue gave way on a less than perfect arrival. I also added some detail to the canopy as you can see form the picture. Thought I'd post some numbers for my electric power train. With a copy APCe 9x6 prop the numbers are 360 watts and 31 amps. I tried an APC sport/gas 9x6 prop and they dropped to 335 watts & 29 amps. Both props were tested with a fresh 2200 mAh 45/90c Nano-tech 3 cell lipo. Weighed the airframe with a 3300 3 cell pack and it's 1060 grams so will be acceptable for taking my A test. It's about time!! Still balances at my preferred 10mm infront of the c of g (as indicated on the plan) and hope to fly this set up in the next few days. Andy Edited By Andy Horsman on 23/02/2013 18:45:26 Edited By Andy Horsman on 23/02/2013 18:46:22 Quote Link to comment Share on other sites More sharing options...
D for Donald Posted February 28, 2013 Share Posted February 28, 2013 Tested again today but the wind was a little gusty to make it ideal. However with 3 deg downthrust (to calm the 40FP) and a couple of clicks of up elevator the upward soar when full power was applied from tickover has been eliminated. It was much improved though this really is a bird that needs full attention! It still may benefit from more testing and tweaking but I'm getting there. Quote Link to comment Share on other sites More sharing options...
carl layden Posted March 5, 2013 Share Posted March 5, 2013 Making some progress, here's fuse & tail feathers. Couple of mods, built up stabs & reshaped the nose around inverted OS. Quote Link to comment Share on other sites More sharing options...
John Tilt Posted March 5, 2013 Share Posted March 5, 2013 Hi Andy I am going to build your E version of Slinky Please can you help me with a few queries! On your wing do you have the same dihedral as the plan? Or is the wing flat. I do not understand about the 6mm Ali spar is it a solid bar or square tube, where is it positioned in the wing? Have you made a removable cabin hatch between F2 and F3 for the batt? thanks in advance Cheers John Quote Link to comment Share on other sites More sharing options...
Andy Horsman Posted March 6, 2013 Share Posted March 6, 2013 Hi John and thanks for your interest. I even had a mention in this month's RCM&E Alex has received loads of raw photos and video so there might be more in a forthcoming issue. I've spent a frustrating hour trying to upload some more photos showing the battery access and hatch. The site keeps on hanging unless I upload one at a time. The wing has the dihedral near as possible to the plan. The main wing is 6mm depron and I just scored a "V" grove at the mid point, propped up one side and filled the groove with low temp hot glue. The 6mm x 6mm ali spar is actually the piece that separates the two glass panels in a double glazed unit such as a french window or similar narrow gapped unit. Easy to bend and this was epoxied in a channel and covered by the 6mm KFm-4 panels that were glued on either side. The leading edge is stock balsa butted together at the centre and blended into the foam at either wing tip. The strip works really well in a flat wing but I wasn't happy with it's rigidity so I added 6mm x 1mm carbon flats behind the top and bottom KF panels. The strips were tack joined at the middle with foam CA and then wrapped with sewing thread soaked with more CA. I can now hold the model by one wingtip and there is zero flex. You can make out the carbon strip in one of the photos. I hope the newer pictures give you an idea of how I make the lipo hatch. Big enough to take a 3300 mAh 3S pack but she is a bit more docile due to the extra weight. I could have made it shorter but I wanted to allow for room in case I need to move things around to achieve the correct c of g. When it came to cutting the fuse sides I drew a line across from the l/e to the t/e making sure that this was level with the horizontal stab cut out. I cut a narrow piece of foam to the size of the KFm-4 profile and, allowing for the balsa l/e, drew around this for the exact shape of the wing seat. Incidently, the bottom of the fuse is filled in with 6mm depron and not left open as I figured this would compensate for the large top battery hatch. The fuse sides are beefed up with wooden slats that were surplus from an Ikea blind! The wing and u/c dowels pass through these and you can see 2 smaller pieces sticking up to to help locate the canopy. I think that should clear things up a bit. If you need any more info then just ask Andy Edited By Andy Horsman on 06/03/2013 20:23:58 Quote Link to comment Share on other sites More sharing options...
John Tilt Posted March 6, 2013 Share Posted March 6, 2013 Hi Andy Thanks for all your efforts getting the photos up! A picture is worth a thousand words! That has fully answered all my queries for the time being anyway, Your vids are great who would have thought you could get bits of Ikea and double glazed windows to fly!!!! Thanks once again, Cheers John. Quote Link to comment Share on other sites More sharing options...
carl layden Posted August 26, 2013 Share Posted August 26, 2013 Nearing completion Pam & Logan (d'missus & young fella) think it looks evil & sinister and I know all the bad things of flying black planes. All that remains is control horns & linkage. Power is from an OS 35AX, I dod make a few mods to the plans, inverted engine, stream lined cowl and added cheeks. The wing is foam core of bolt on design. With a little help on Wx side may get a test hop in this week. Quote Link to comment Share on other sites More sharing options...
carl layden Posted September 7, 2013 Share Posted September 7, 2013 Flew the Super Slinky today. Flys well with no bad habits, needs a tad bit of down thrust (probably caused by my building It'ds very quick with an OS 35AX turning an APC 9x7 prop. Thanks Alex, was a straight forward build and the plane is a 'hoot' to fly! Here's some shots of the first flight taken by my son Logan (11) Edited By carl layden on 07/09/2013 17:56:58 Quote Link to comment Share on other sites More sharing options...
Stephen Horan Posted January 4, 2014 Share Posted January 4, 2014 My Super Slinky... more covering to do but nearly there. 2200 3s Lipo Quote Link to comment Share on other sites More sharing options...
Andy Horsman Posted January 4, 2014 Share Posted January 4, 2014 Hi Stephen nice to see another "E" Super Slinky although I see that you went for the trad construction method.I like the cockpit window shape. Makes it look even racier. I would be interested to hear what your rtf weight is and the motor specs etc. I'm now running mine on a 4S 1800-2200 mAh pack set up for a bit more oomph. Hope you have some decent flying weather soon and don't forget to post a video if you get chance. I'm now using the Mobius 720p/1080p HD action cam for my ground to air and aerial vids and it's a big improvement over the previous #16 cam Andy Quote Link to comment Share on other sites More sharing options...
Stephen Horan Posted January 4, 2014 Share Posted January 4, 2014 Hi Andy, It does look good now its covered, its running a 15-size 950Kv Brushless outrunner with a 30A ESC . I also am going to attach a camera at this link.... I am going to try the camera out on one of my other models tomorrow and I hope the quality is ok. **LINK** Stephen Quote Link to comment Share on other sites More sharing options...
Stephen Horan Posted January 5, 2014 Share Posted January 5, 2014 The flying weight is 1.3kg (45oz) but needs the c of g checked... where should the c of g be around as there is some people that say put it 2cm towards the LE? well its all finished now and is ready to fly. here's a video of the camera on my Sig biplane at the strip.. filmed it this morning..**LINK** Quote Link to comment Share on other sites More sharing options...
Andy Horsman Posted January 5, 2014 Share Posted January 5, 2014 I went with 2cm forward of the marked c of g on Alex's plan and this has worked for other builders. You are running a heavier motor than me so you should have no problem balancing with the pack back from the former. The main problem with I.C. powered models and on board video is vibration. It causes lots of jello. It will be better on the SlinkyE but if you want a massive step up in quality (without the cost and weight of a GoPro) then I highly recommend the Mobius. There are two RC Group threads -support http://www.rcgroups.com/forums/showthread.php?t=1904559&pp=100 with over 5600 posts since June 13 and owners http://www.rcgroups.com/forums/showthread.php?t=1971523&pp=100 I use my Mobius more as a hatcam so I can record my flights. Just search YouTube under "heady2008" for my vids (163 and counting!) Here's a recent video shot by one of the contributors http://vimeo.com/83214627 shot using the old firmware, now had major tweeks. Good luck with the maiden Quote Link to comment Share on other sites More sharing options...
Stephen Horan Posted January 12, 2014 Share Posted January 12, 2014 Maidened the Slinky yesterday. Flew great some down trim and it flew lovely, very controllable. However on the second landing, the rear wheel hit the strip hard causing the rudder to snap. I may try a bigger battery as on a 2200 3s I only get 4 minuets flying time with 30% battery left. Quote Link to comment Share on other sites More sharing options...
Andy Horsman Posted January 12, 2014 Share Posted January 12, 2014 Good news on the maiden. Sounds like the rudder will be an easy fix. My lighter but lower powered set up can take a 3300 3S pack without denting performance too much. Quote Link to comment Share on other sites More sharing options...
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