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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
They look very similar to the menz, i wonder how they perform. Can you pop some rpm figures up if you run them on the 400 or the 300v
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
Anyone using RealFlight simulator?
I have uploaded my FS400 engine sound profile to the swap pages. :) http://www.knifeedge.com/forums/down...=file&id=17566 |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
My glow thingmabob arrived!!!! :D its all installed and the plugs go a nice orange not a slightly pathetic fading red! even though its gone rly cold and windy i think it would rude not to try the radial later! unless i get really cold and hide in the building shed :(
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
Ok, i ran my engine and am happy with the glow driver as its am improvment over the old one..the engine however is still an issue at idle. Anything below 2000rpm and it will slowly run down and stop. its also a nightmare to start half the time needing the choke closed while running the starter with glow on. As soon as it fires let choke off keep cranking until revs come up a bit then off starter and ready to throttle back before you loose your arm. Not friendly. Hot restarts are often just as bad. Thing is it never used to be like this, i may have to take the tank out and see if i pipe is kinked or something. Sigh :(
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
Which glow driver have you bought ?
Have you checked your valve clerance on all three lobes on each cylinder ? |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
Carosel,
Thats awkward. My 400 has NEVER seen a starter. It is always handstarted, five turns at the max. I am generally not a fan of using brute force because as soon as the cylinders kick in you are dictating a differnt rythm which cannot be good for the bearings and bushings. Lasers dont need a starter anyhow, Saito was more work but started well in the end too. FWIW, I am back to the original carb and it works fine, actually 150rpm better than the OS... Go figure. But your problem really sounds like a fuel issue. No leaks in the tubing? What happenes if you put 2-3ml of fuel directly in the carb and start it? Rev |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
Mine wont start without a starter as it just will not fire strongly enough on one cylinder to turn it over. And i hate using starters, i only use them if i cant prime the carbs or its really cold and they wont go. In any case my engine has always done this but its gotten really bad just recently. the valves are as ok as they can be with the total hopelessness of my engines tolerances,and if i prime it as usual and try to start it will often fire up and then die or will only fire on one pot. you can do what you like with the slow run and it makes no odds. I even port primed each cylinder through the exhaust and that helped but was not instantly a success. it sounds to me like a suction issue but its only gotten this bad since i put it back in the model, it was starting ok before in the model and in the test stand. but if a pipe was kinked or something then full power would also be a problem and its not, also when its running its fine, no problem, its just getting it started thats the issue. I am so frustrated by it, i will see how it restarts tomorrow having been run today
If its no good i am sorely tempted to just buy a new one and throw this one in the ali skip at work for recycling :( |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
oh and my glow driver is a unit from glowswitch.com. cheap at 65 quid and it came with a 6600mah 2.4v battery. Should give plenty of runtime
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
ORIGINAL: Carosel43 Mine wont start without a starter as it just will not fire strongly enough on one cylinder to turn it over. And i hate using starters, i only use them if i cant prime the carbs or its really cold and they wont go. In any case my engine has always done this but its gotten really bad just recently. the valves are as ok as they can be with the total hopelessness of my engines tolerances, and if i prime it as usual and try to start it will often fire up and then die or will only fire on one pot. you can do what you like with the slow run and it makes no odds. I even port primed each cylinder through the exhaust and that helped but was not instantly a success. it sounds to me like a suction issue but its only gotten this bad since i put it back in the model, it was starting ok before in the model and in the test stand. but if a pipe was kinked or something then full power would also be a problem and its not, also when its running its fine, no problem, its just getting it started thats the issue. I am so frustrated by it, i will see how it restarts tomorrow having been run today If its no good i am sorely tempted to just buy a new one and throw this one in the ali skip at work for recycling :( rev |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
the problem is that every seal, every valve, every gasket andevery Oring leaks like a seive. some of the rockers can move sideways almost enough to clear the valve stems. The bearings are such a poor fit they fall out of the housings and had to be glued in with locktite, the valves wobble and have been eroded by the valve seats as they are made from monkey metal. none of the pushrod tubes seal and they all vibrate up and down and rotate when running. The piston rings loose all ability to do anything when they are hot....Honestly its a heap of crap. But, when its actually working, i love it!
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
Ok, when i last ran my engine in the test stand it was fine. It would run down slowly but it started no problem. This issue has come about since it was put back in the model. the tank is the same (but plumbing may be kinked) and the only onther difference is the exhausts. as it looks too cold nasty to fly tomorrow i will have a look at the tank and the rest of the install and see whats what. i will also put a cable tie around each rubber 'boot' onthe intake manifolds to make sure there is no leak there. The other issue it could be is a leaking inlet valve thats leting air into the system in the wrong direction. I will see tomorrow. It might just restart, if so im leaving it well alone!
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
My engine has never been able to be started by hand either. I have seen videos on YT of guys hand starting theirs and now Rev saying the same thing.
I can try to flip mine till the cows come home, and it won't light off. But all I have to do is bump it for a nano second with my starter and off she goes! |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
before the detonation it would hand start if well primed but it was never 100%
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
ORIGINAL: Carosel43 the problem is that every seal, every valve, every gasket and every O ring leaks like a seive. some of the rockers can move sideways almost enough to clear the valve stems. The bearings are such a poor fit they fall out of the housings and had to be glued in with locktite, the valves wobble and have been eroded by the valve seats as they are made from monkey metal. none of the pushrod tubes seal and they all vibrate up and down and rotate when running. The piston rings loose all ability to do anything when they are hot....Honestly its a heap of crap. But, when its actually working, i love it! |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
well i tried to get it going and eventually it started. it then stopped for no apparent reason and will not restart. so, its out of the model and every valve is leaking, and all the leaking inlet valves are most likely the cause of the issue. but its always had leaky valves so i dont know why its suddely decided not to work at all. from experience however i know that the valves cannot be made to seal correctly as they are too badly made. if i cant figure out another way im binning it. im just too fed up with it
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
plane all back together and replumbed. Starter working well as i got fed up with the 12v supply and hooked up a 6s lipo at 24 volts. Spins at about 2000 just on the starter! anyway i primed it up and nothing, not even a fart out of it. turns out the glow driver battery has died. so, i tried a normal glow driver on one cylinder thats always the last to fire and it was firing strongly. So, we will see what happens when i get glow power back on all 5
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
I dont know what i did, but i think i fixed it
http://www.youtube.com/watch?v=s0UYY...ature=youtu.be |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
ORIGINAL: Carosel43 I dont know what i did, but i think i fixed it http://www.youtube.com/watch?v=s0UYY...ature=youtu.be off to the field! |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
its cold and windy and dark, so no fly today. tomorrow its cold and windy and raining! might be another week or so :( i hope its soon though or th engine will break again
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
ORIGINAL: Carosel43 I dont know what i did, but i think i fixed it |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
the sooner i build my own the better
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
engine that is not woman!!
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
ORIGINAL: Carosel43 the sooner i build my own the better Hi Jon Good evening! I think you mentioned sometimes you had been planning an engine of your own design..? Any news? I think there are many of us that are very curious to know how you proceed with that engine project.. Artto |
RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
I am working on many things, one of which is ready for air testing ;) but you guys will just have to wait :p
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RE: ASP/MAGNUM FS400AR Rebuild/Overhaul
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ORIGINAL: Carosel43 its cold and windy and dark, so no fly today. tomorrow its cold and windy and raining! might be another week or so :( i hope its soon though or th engine will break again my back yard this morning :( |
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