bert baker Posted October 8, 2017 Share Posted October 8, 2017 So I built a plane for these little engines, the first one had a fuel pipe up to a Venturi like a normal glow pylon engine, that did work until the tank broke, Having these other two as spare engines I thought just fit them and fly, but they won't run more than 2-5 seconds, have stripes down and cleaned them, I rather fancy because I only try to use them once a year this may be a problem,,,,,is there any special things I should be doing with them to maintain reliability Quote Link to comment Share on other sites More sharing options...
Former Member Posted October 8, 2017 Share Posted October 8, 2017 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted October 8, 2017 Share Posted October 8, 2017 Might help if you tell us what these engines are...make, fuel type etc? Personally, I don't recall seeing any engines with stripes down them... Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted October 8, 2017 Share Posted October 8, 2017 Bert, don't keep stripping them down, parts can be assembled wrongly, e.g piston backwards, and bits can be left off. By the small size you suggest, they could be diesels, but the guys need fuel type and motor name. The small metal fuel can is a clue, and is there a glow plug in the cylinder head Or is the head one piece with an electrode Or is there a bar to be screwed up and don't on the cylinder head These guys can help you Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 Oh yeah, must have been day dreaming when I did op, I was suppossduto do pics but got side tracked They are Cox 0.020 I think Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 Stripped not striped only had backs off not touching piston or crank Edited By bert baker on 08/10/2017 11:59:46 Quote Link to comment Share on other sites More sharing options...
Former Member Posted October 8, 2017 Share Posted October 8, 2017 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted October 8, 2017 Share Posted October 8, 2017 I used to run Cox engines, TeeDee 010, PeeWee 020, Babe Bee 049, Golden Bee 049 and the best of them all a Black Widow. All needed to be run off very high nitro content fuel (as you state in your post Percy) and the glow heads on the smaller ones just didn't last that long. The needle jets were also prone to gumming up and needed to be kept clean a symptom of this was that after priming through the ports, they would run for a few seconds then die. All were screamers and extremely noisy (none of mine were silenced apart from the Golden Bee which had a ring muffler and killed the performance as well as the noise). Quote Link to comment Share on other sites More sharing options...
Former Member Posted October 8, 2017 Share Posted October 8, 2017 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 Have been trying 30% optifuel, Tried a new head, using a 1.5 v batt I do have a good glow so that's not the issue for starting Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 I have a few 049 ones and do not have problems with them Quote Link to comment Share on other sites More sharing options...
Former Member Posted October 8, 2017 Share Posted October 8, 2017 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 Might have to get a new tank for this one, Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 The old tank had a repair to pick up pipe before my ownership,,Ned problem will be where to get one Quote Link to comment Share on other sites More sharing options...
onetenor Posted October 8, 2017 Share Posted October 8, 2017 All that has been said is true but no one mentioned that the reed valve can stick. You would have to find instructions for strip down but not sure where.Re the heads I converted one of mine to take a plug. Drift the insert out from inside then carefully tap using Model engineering tap .24TPI but can't recall diameter. but is dia of glow plug. Use first and second taps. Don't run them both right through. On second tap go in stages trying the plug for fit. I can look for taps if no one can tell us what size is. P.S. That plane would qualify for an ebenezer contest . Edited By onetenor on 08/10/2017 13:02:57 Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 Valve is ok have checked that the standard size for. Glow plug thread is 1/4 x 32. Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted October 8, 2017 Share Posted October 8, 2017 A.K.A. 1/4" UNEF Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 Could try a new engine Quote Link to comment Share on other sites More sharing options...
Piers Bowlan Posted October 8, 2017 Share Posted October 8, 2017 Yes that would do it Bert but I fear the model might rotate faster than the prop - but not for very long! As you can see, the reed valve is held in place by a spring and is easily removed and cleaned in meths or similar. As has been said earlier, remove and clean the needle valve and spray carb-cleaner or meths down the orifice to get rid of congealed fuel/oil and foreign matter. There is not much to go wrong so if the fuel is at least 15% nitro, fresh and you have a decent glow from the plug it should start and continue to run. Hard to believe that such a small engine can make such a loud irritating noise! I spent a lot of my misspent youth playing with these great little engines. Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 Many thanks for everyone's inputs, Must admit to not actually taking valve out to clean it. The one I have with a red rear tank looks to be rare have found a engine NIB , for 250 usd, what were two a penny in my youth is no longer, Duno if any other manufacturer of similar engines are still about, I think Testors was one make with a square white tank on back, it was probably a 249 Actually just had a thought, I could fit a free flight hopper tank and refit my original engine Edited By bert baker on 08/10/2017 14:03:52 Quote Link to comment Share on other sites More sharing options...
Piers Bowlan Posted October 8, 2017 Share Posted October 8, 2017 If you want another engine perhaps Den's model supplies is the place to go here. I have bought a few parts from him although I don't know if he can do the 020 engines, just .049 I think? Hobbyking sell the .049s too. Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 Thanks Piers, I have had a look at that it may well be worth a phone call Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted October 8, 2017 Share Posted October 8, 2017 hello Bert,i've dealt with den recently..he is top notch and very helpful. He ordered me some bits for a Cox engine from America.....posted them to me and asked for the payment after I had received them from him...what more could you ask for...5* service.. ken Anderson...ne...1 three cheers for den dept. Quote Link to comment Share on other sites More sharing options...
bert baker Posted October 8, 2017 Author Share Posted October 8, 2017 I have purchased a new cox quick start from him a few years ago, I shall ring next week to see if he can help. I need to order a plane from him anyway so shall seize the opportunity,just annoying I took time to build something different and no shortage a of engines can get it flying Quote Link to comment Share on other sites More sharing options...
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