Saito FA 170 R3 diff glow plugs test run
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- Опубліковано 28 сер 2024
- Hello, my dear viewers and subscribers ! This along waited video really prepares a lot of sudden and unique adventures during movie making and editing process. I must say, that once again I confirmed for myself, that Saito FA 170 R3 engine is one of the best RC 4 stroke radial engines ever made. During two years I make a lot of testing with this engine, finding shortest possible way to understand it's behavior and clarifying performance details. Exactly after a dozens of hours spent of a bench with Saito FA 170 R3, I understand, that this engine is simply the best for me. I like it by any meanings, from the point of reliability, flexibility, simplicity, greatest build quality and very flexible and tolerant behavior. After testing few glow plugs, was decide to keep genuine Saito SS1 glow plugs, because performance was simply flawless. I also found something interesting in engine behavior with O.S. G5 glow plugs - this unique behavior of the engine was recorded on camera - the engine, having dropped speed, began to rotate in the opposite direction, I was added this capture in video, so you have a unique chance to view by your own eyes. Also, a slow replay of the reverse moment was added into this video.
I hope, that you will enjoy this video, I was worked a lot and hoping that the result will be adequate to the time and labor invested.
Thank you very much for watching !
Have a nice day !
I love watching and engine running that rich! Great Video mate.
Oh yeah that last bit... thats a new feature, reverse thrust. :) :P
Thank you for your nice comment ! Worked hard to deliver the key moments. And yes, it was absolutely unexpected, such occasional self reverse. I was very happy, that could capture this on camera.
Glad I found this video... It very well illustrates the issue of uneven fuel distribution.
The G5 plug helped slightly but the performance is still far from acceptable. //
I have tried to find pictures online about the MMM intake manifold..
But no luck this far.
Thank you a lot for that information !
Sweet.👍
Thank you, much appreciated !
Nice photography. Well, I can see how well lubricated your engine was, lol. No shortage of oil there and your test stand will never rust! 😂
Thank you for your nice comment ! And yes, you're totally right - you can't find any rusty spot om my workbench - it's covered with thin layer of an oil, mostly, with Klotz Techniplate, as well, as with Motul Micro 2T 🙂
To be honest, I like to run a new, or freshly reassembled engines with additional oil content, going to avoid any possible seize of an engines.
Proper lubrication is a key !
@@crazyengines88 🙂
@@xKmotx 👍
Hello and congrats on your videos,
Do you think it would be possible for a glow radial engine with G5 glowplugs to burn gasoline?
(without changing the carburator)
What percentage of oil would you use?
Thank you
Hi, and thank you a lot for your question ! In fact, these spark plugs can ignite both gasoline and methanol fuel mixtures. But... the carburetor of a methanol engine is not at all configured to work with a gasoline mixture, and the engine, with a high probability, will not be able to work normally on a gasoline mixture with a methanol based carb, well, or almost not at all. Options:
To replace the methanol carburetor with a carburetor for gasoline mixtures (for example, with a carburetor from a DLE 35/55 engine or something from this series.). There is also confidence that an engine converted in this way will work with significantly hig0her operating temperature (the calorific value of gasoline is significantly higher than that of a methanol mixture). So, based on above mentioned - better to find more balanced solution, or even this configuration raises questions. Thank you and have a nice day !
I love watching the exhaust spray oil at idle speed. Do you have any plans to mount it to an airplane and fly it?
Thank you for your nice comment ! Definitely, not yet, never think about. Most likely, it’s just a pity for the engine, I can accidentally ruin.
Hi,, Did you managed to get the engine to run properly ?
It seems that all the Saito radials have the same issues.
Hi, nice to hear from you ! Not yet, exactly, there is few very time consuming things are breaking my future Saito radials engine's "how to fix" investigation. A new job, very important for my country and a new house, not so ready for engine's investigation. Anyhow, I'm on the way, still working on CrazyEngines channel. Should say, that there isn't completely confirm, that all 3 cylinder radials have the same behavior. There is two bunch of problems, first, is with glow radials, and second, is with FG, gas modified engines. Glow versions has better adaptation for Saito own design flaws, because of glow ignition nature - moment of ignition is auto regulated by the glow plug, where with spark ignition, point of ignition is clearly defined by the placement of ignition magnets. So, based on my own understanding, that Saito FG60R3 (for and from my own example), has geometrical, mechanical mistake, so every crankshaft turn engine fires or earlier (on #1), or later (#2), or similar to that. So, this non synchronized process provoke engine to shake and to vibrate a lot. When I convert engine into a glow ignition, vibrations were reduced a bit (due to the automatic advance glow ignition), but this vibration problem is still exists. I'll need more time to find the way, how to correct this. Thank you for your question and have a nice day !
@@crazyengines88 The biggest issue and contributor to poor lowspeed and transition at 5000RPM is the fuel delivery (manifold/ back cover).
As you correctly pointing out the ignition is another issue affecting the gas versions, unless the timing magnets are corrected.
One thing that no one are mentioning is the relation to the cam timings, maybe that is not a problem ??
However if I would bet any money I would bet on the manifold as the biggest problem, giving rough operation and variations in cylinder temperature.
I have made my own modification but have not yet had time to play and confirm it. The idéa is to keep the volume as small as possible and to have identical fuel delivery to all 3 cylinders. I hope I will have time to test it during this winter.
@@roki5941 Yes, thank you ! This problem requires very consequential plan to investigate it in detail and for sure, will consume a lot of time. I also dream to find and to fix such engine behavior, but my reality told me, that this series of videos could be boring enough 😂 I also think, that manifold is a key factor, but this fact isn't reflects such huge engine vibrations. There is only way - consequentially find and eliminate each part of the problem, it's for sure consists from few design flaws.Thank you ans have a nice day !
@@crazyengines88 I think that vibrations usually come from flooded combustion chamber.. Do you have vibrations on all of your Saiti 3 Radials ?
@@roki5941 No, not all my 3 cylinder Saito radials shows the same behavior. Such high level of vibrations is mostly owned by Saito FG60R3, higher with spark ignition, ;less with glow ignition. Due to glow ignition ability for automatic ignition pre - advancing, glow ignition shows twice, at least vibration level. From this facts I make a conclusion, that mechanical design flaw in FgG60 could be partially compensated in glow ignition engine setup (based on OS G5 type glow plugs). The rest of mine Saito radials (FA120R3, FA 170R3 and even FA 325 R5 D2) doesn't show such vibration level. What is common for all this engines (less with FA 325 R5 D2), is that all are tentative to run with diff cylinder temps, two are usually runs hotter (so, leaner fuel mix), and one is running cooler (so, richer fuel mix). This is clearly fuel distribution design flaw, non even fuel distribution.
Заливает безбожно...При этом както держит холостые...
Thank you for your comment ! I always prefer slightly richer mixture when I start the engine after rebuild or repair, as it actually, will again needs a kind of a gentle break-in. Therefore, it looks as flooded a little. But it doesn't really affect idle performance, as I always tunes the engine to keep stable and low idle speed.