Nigel R Posted October 28, 2021 Share Posted October 28, 2021 why are the temps so hot on enyas? just down to cam profile? Quote Link to comment Share on other sites More sharing options...
Jon H Posted October 28, 2021 Share Posted October 28, 2021 Not sure, they just seem to be dead toasty. That said, a friend had a laser 240 in a spitfire with straight through stainless flexi pipes on it. Sadly for him, his fuel tank vent pipes were touching these headers and caught fire! Yep, the silicone tube caught fire in flight. Luckily this ultimately caused the engine to stop but i have never seen anything like that before. Quote Link to comment Share on other sites More sharing options...
John Stainforth Posted October 28, 2021 Share Posted October 28, 2021 7 hours ago, Jon - Laser Engines said: Not sure, they just seem to be dead toasty. That said, a friend had a laser 240 in a spitfire with straight through stainless flexi pipes on it. Sadly for him, his fuel tank vent pipes were touching these headers and caught fire! Yep, the silicone tube caught fire in flight. Luckily this ultimately caused the engine to stop but i have never seen anything like that before. The flexipipes that I put on the Laser 200V in my S6b worried me a bit, because they are quite close to the fuel system. However, they seem to have worked out fine, in practice. The pipes are protected by thick silicone tubing where they pass through the 3D printed nylon engine fairings (which have a pretty low melting point). The first picture is with the engine running. This second picture shows the proximity to the tanks: Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted October 29, 2021 Author Share Posted October 29, 2021 Nice, got any videos of it flying, where did you get your flexipipes from ?. Quote Link to comment Share on other sites More sharing options...
John Stainforth Posted October 29, 2021 Share Posted October 29, 2021 Paul, I think I got the flexipipes (called bendy pipes) from Mick Reeves Models. (I don't seem to be able to access that site to check, because my server says it has potential viruses!) Several short videos of the first two flights of my S6b, piloted by Ian Redshaw, appeared on (the dreaded) Facebook on Sept 12th, two courtesy of the British Waterplanes Association (one of engine tuning, second of first take-off) and one from Seaplanes Scotland of some fly-pasts on the second flight. I, and several other people, also put some photos Members New Models forum on this site. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted October 29, 2021 Author Share Posted October 29, 2021 (edited) Thanks, I found this and ordered a metre,,,,, https://www.energyduegi.com/default.asp?cmd=cartStep mail sent to, [email protected] for some 12mm thanks,, mail won't work,,, now,,,,[email protected] Edited October 29, 2021 by Paul De Tourtoulon mail sent and won't work Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted October 30, 2021 Author Share Posted October 30, 2021 Oh dear what is wrong with me,,?, it's gone back from a lousy copy of a Laser back to an Enya,,, i assure everyone that no animals we hurt tortured or killed in this operation of 'gender' change,,,? something else is different,,, can you spot it ?. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted October 31, 2021 Author Share Posted October 31, 2021 Not a big success, even closing the idle mixture on the carb it was running a very lumpy idle like it did with it's original carb, I also lowered the tank so that the fuel level was 2 cm below the main jet, it did improve it's idle a small amount and it's still doing 11000 rpm on the APC 14 x 7, even with my home made silencer till it decided to part company obviously the noise was too much for it, so waiting for my flexible and my friend who is making me a threaded tube to fit the exhaust nut. Ps Rain stopped play, I will have another go Tuesday. pps, oil everywhere so maybe when I get it going this week I will try some other fuel. Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted November 1, 2021 Share Posted November 1, 2021 Try making a head shim from some litho plate. The 60 I have was a nightmare and fitting shim (retarding the timming) made for a smooth idle and still revved well. You might loose a little top end but if that not an issue it's worth a try. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 1, 2021 Author Share Posted November 1, 2021 Yes thanks, but still on the carburation, the Perry worked Laser style so why not with it's own admission pipe ?. Just linked up my 'hair spray' silencer for tomorrows run,,, Quote Link to comment Share on other sites More sharing options...
Jon H Posted November 1, 2021 Share Posted November 1, 2021 I would try a bigger prop. 14x7 is really small and you might have better luck with 15x8. Also when you drilled the jet you may have interfered with the operation of the slow run needle so that could explain the issues you are having. Quote Link to comment Share on other sites More sharing options...
Nigel R Posted November 1, 2021 Share Posted November 1, 2021 Maybe the fuel is coming out of suspension (what's the right word here?) whilst it goes along the longer intake pipe, or pooling at the valve or something, and then making it into the cylinder in dribs and drabs? It doesn't make it all the way in with one single intake cycle? Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 1, 2021 Author Share Posted November 1, 2021 I don't have a 15 x 8, but only a 15 x 10 not tried yet, as for the slow needle it was perfect when it was on the short pipe although it was spitting a bit. see what I get tomorrow,,, Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted November 1, 2021 Share Posted November 1, 2021 (edited) Paul, I have Bolly 14.5 x 8 and 15.5 x 8 Pro Glass props if you want to try them on your 120R. They are quite substantial round the hub and blade roots so may help with flywheel effect to smooth out the idle? Edited November 1, 2021 by David Ovenden photo added Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 2, 2021 Author Share Posted November 2, 2021 Thanks Dave, tell me when I can pop around to get them ?. Ps, I thought Bolly props were wood,,, oh dear,,, Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 2, 2021 Author Share Posted November 2, 2021 Thanks for the props and coffee David,,, The 14.5 x 8 Bolly gave gave some good numbers up with the slow idle of the APC, but it did need a 1/4 of a turn on the idle jet to the lean side to get it to a stable idle as did the 16 x 8, the 16 x 8 was not so good with the idle and a bit twitchy on the main needle it also vibrated the most. This was with my hair spray exhaust. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted November 2, 2021 Share Posted November 2, 2021 Low end lean is always ok, as their is enough oil in the fuel for tickover. Lack of high end needle adjustment Usually indicates lack of or unreliable Tank Pressure. Is the tank pressure feed connected to the silencer? Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 2, 2021 Author Share Posted November 2, 2021 Silencer, What's that ??, so no pressurised fuel,,, I put the leaning off of the carb down to when running with the laser mounting ( can I use that term Jon ? ) it spits so not all of the fuel is going into the engine, whereas ( my thoughts ) with the Enya admission tube the fuel doesn't spit out so much ( or not at all ) so needing less fuel. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 6, 2021 Author Share Posted November 6, 2021 I am still looking for a 'nut' and the thread so that I can make up the silencer, my 'friend' has got no where? and his boss won't let him make a nut, probably too many working there already,, So no one out there can help me ?. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 7, 2021 Author Share Posted November 7, 2021 Just thinking of my mechanics days, maybe it's 15mm x 1 thread on diesel engine injectors, I will have a look at getting a nut and injector head and see it I can make my own one up. One new un run one went on leboncoin in france this morning for 125€,,, Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted November 7, 2021 Share Posted November 7, 2021 I have M14x1 tap and die (suits Saito 120 -180 exhausts) but can't help with 15mm. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 7, 2021 Author Share Posted November 7, 2021 Thanks for the offer, I might take you up on it tomorrow,,, Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted November 7, 2021 Share Posted November 7, 2021 You will find any tap or die you need from Tracy Tools in Dartmouth in Devon . They sell them in various grades from carbon steel to proper HSS depending on how often you are going to use them. Very good and very helpful. Only sure way to check size is with apitch gauge and vernier . Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted November 7, 2021 Author Share Posted November 7, 2021 (edited) Thanks but I am in France, and prefer 'finding' a nut and bolt, and turning it down on my lath, and it gives me something to do,,, I have a 14mm Enya exhaust ( 90c )but there isn't enough metal on it to drill it out to 11mm Edited November 7, 2021 by Paul De Tourtoulon 14mm Quote Link to comment Share on other sites More sharing options...
David Ovenden Posted November 8, 2021 Share Posted November 8, 2021 (edited) I seem to remember, but may be wrong, that the Saito 220 engine used an M15x1 exhaust thread . Maybe some use? Edited November 8, 2021 by David Ovenden Quote Link to comment Share on other sites More sharing options...
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