Tom Major
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Everything posted by Tom Major
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Thanks Cymaz, looks like one to consider.
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I really would prefer IC John. Have flown EP before and quite disliked limitations of it when it comes to flight time. It was very convenient on the other side and of course much cleaner, but I could trade that off for good fun with glow engine
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Hi folks. I am looking currently for a way to get my xmas pressie sorted. Since I am getting more and more back into the hobby I figured out I'd like to finally get one of my all time favourites, Edge 540, which would of course be powered by an IC engine. I had a look at few kits but they all seem to be quite big (1400mm wingspan or thereabouts). I am wondering if there is anything smaller on the market? Preferably something upto about 1m span? The only reason I am looking for such a small plane is lack of transport for it (only motorcycle, no car yet sadly) and as much as I'd like to get Seagull's Edge 540V3, it will be a nightmare to carry it to local fields. What is the smallest IC powered ARTF you can think of? Thanks in advance for pointers. Tom
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I wouldn't think you do have any shares with them mate . Thanks again for pointers, notes taken. Today was not a good day... All props that I ordered last week still didn't turn up. Props for Cox most likely went missing in post, prop for .10FP was sold out before I ordered it and got message from shop followed by cancellation. Oh well, finished work late anyway, might as well get back to .40FS and get them valves out and finally start putting it back together. I have a prop for this one :D
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Work related experience. I used to maintain hotel for 1.5 years and believe it or not, we had most stuff from Wilko or BnQ. Tools, fastenings, you name it. I've seen my fair share of rounded off nuts, stripped threads etc .
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Measurement was bang on 5mm on the shaft and about 7.6mm over 10 threads. Went to Wilko and just grabbed pack of M5 bolts with nuts and washers. What an amazing fit !. Of course they are madde of cheese, but for the time being will do just fine . Now to finish test rig and .10FP can have its final run before another cleaning and storage. In other news, package with Cox props that I ordered over a week ago most likely went missing in post. Can't have everything I guess... Thank you all for advice.
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Some really amazing advice coming in, thank you. Didn't touch FS as I got back from work not long ago, but spent few minutes with Testors McCoy .049 that only came in post today - cylinder was pinching the piston a bit, on closer inspection I have noticed tiny chip/dent, most likely caused by careless cylinder removal. I have used thin file to get rid of it and surprisingly piston moves up and down freely, fair compression still present, looks like it might be a runner 😀. It's a shame that not many of these little engines remain complete, I have another one with cracked crankcase and both are missing starter spring. I am hoping I will be able to get at least one running, just need to order 1/2a prop to test it. Also finished .10FP, there wasn't much to do, just put new head gasket in and tightened the bolts. Here is a shot of two gaskets for comparison. What difference £1.29 can make... I checked once again few nuts that I could use on the crankshaft and am not sure if it really is common M5 - none fit... Edited By Tom Major on 02/12/2017 23:20:17
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I know it is quite common Steve, I was surprised I don't have even one fitting... There is not many specialist shops in my huge city, but I will try to visit Wilko if I finish work early enough - they should have various sizes in stock.
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I just finished looking for any matching nut, found one of same diameter, but no joy with pitch . I'll message you shortly Peter. Gaskets arrived today, new head gasket is so much thicker than old one - that is like tinfoil.
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Speaking of threads... does anyone know what is thread size on the crankshaft? Disaster happened as it turned out I don't have prop nut for .10FP... Now little engine is back in one piece. I managed to salvage backplate gasket, but still need to wait for head gasket, hope new set arrives tomorrow. All moving parts are oiled and engine turns over smooth like never before. Despite bolts being only tightened by hand and lack of head gasket, I can hear very nice popping sound, of course followed by air leak. This one should run sweet once I finish it, in the meantine I can get back to .40FS and also got 3 Cox engines to test Edited By Tom Major on 01/12/2017 01:03:04
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Once again thank you Doctor for very valuable advice. I have received ordered screws for .10FP today so I thought it might be good idea to try them. All screws are perfect fit, so since I had engine out, I gave it a little clean with polishing paste. Sadly I was unable to remove all blemishes, but it already looks much better. Now all components are drying out and once they did, I can reasemble most of the engine - set of gaskets still didn't arrive, neither did prop, so I'm guessing I will manage more during weekend. Now I only have backplate to clean/polish, but don't want to touch it in case ordered gaskets don't match.
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Amazing tip, thank you Martin.
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Electric equivalent to a Cox 049
Tom Major replied to bert baker's topic in Electric Flight for Beginners
Have a look at EMAX CF2812 motor, pair it with 18A ESC and 6x4 TGS sport prop and you'll have much more than Cox is able to give you. Had Sharkface powered by Golden Bee and another by said motor, the electric one was mental! I used it with 1300mAh lipo as far as I remember. Edited By Tom Major on 29/11/2017 23:07:44 -
The satisfaction when your scratch built model flies is something that should be experienced at least once. I remember my first Sharkface flying, fantastic feeling. Good luck with your next build mate.
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I think I will go for elbow grease. It does work wonders and shouldn't consume as much time as my Golden Bee did - took me 3 days to get rid of that golden anodising, but it was worth it - prior to polishing engine was all scratched etc, now it's just Silver Bee . I managed to remove carbon from piston ring groove already, now it's only piston and conrod left (well maybe few other bits too). Ring itself is in good shape and looks like will hold up for much longer. I will need to find a way of removing the collets, tried once and failed. I remember using socket on valves from GPZ500S engine and that worked amazingly well, just need to find socket small enough... Thanks a lot for good advice, I'm sure it will make whole process much easier.
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Yeah, this Vernier should have been binned long time ago.... Thanks for input Denis, will find out soon if order is correct
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I have another question. Just finished measuring all screws for .10FP. Here is what I came up with: 2x 2.4x23 4x 2.4x10 5x 2.4x6 2x 3.3x5. but the closest dimensions I found were MF-SC57 M2.5x20 Steel Cap Screws MF-SC51 M2.5x6 Steel Cap Screws MF-SC52 M2.5x8 Steel Cap Screws MF-SC27 M3.5 x 8 Cap Screws Do the sizes selected in order seem to be correct? I suspect my Vernier gauge is not exactly reliable... The last two 3.5x8 are supposed to hold the carb in place, couldn't find 5mm though. Will find way round it, as long as I have something to work with I guess
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Another amazing tip, thank you Martin.
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Engine Doctor Engine in need of restoration is .40FS. 10FP was the one with most screws damaged. I'm glad you mentioned thrust washers, have few in box with spares and wondered what these were for . I was well chuffed when I got little FP apart yesterday. Piston and liner are near perfect, looks like this engine had very little use and still has plenty of life left in it. .40FS has quite a lot of carbon build up inside, half of the piston, exhaust and exhaust port and even conrod was black. I'll have to have a look on ebay, maybe I'll find new parts, but if not, compression was still good and I'm sure it will run for a while .
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Good point Nigel, will check before I place the order. Thank you for another source and feedback on them.
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Thank you for information Peter, and for pointer to just bearings too. The more sources the better . I am expecting test stand and few props to arrive before the weekend, if all goes to plan my rig will be ready and engines will run .
