Saito FA120 R3 assembling and trial run
HTML-код
- Опубликовано: 4 июл 2023
- Hello, my dear viewers and subscribers ! This engine has its very special own story. After the very first run it was sited in it's box, waiting for its internals inspection. Was passed few months, at least. Engine was dismantled, cleaned thoroughly, but I found, that one of the piston pins (from the Cyl #3) was lost somewhere in my workshop. So, if there is no piston pin = there is no engine, so I was ordered this piston pin at RC Japan store ( and thanks a lot, it was delivered in one month). Should say, that I was very surprised with the information, that Saito practically, don't have a lot of spare parts at their warehouse, and if there is a request for some parts are coming, they are manufacturing this parts. The same story was with my piston pin for Saito FA 120R3.
So, piston pin was arrived few day's ago, I start to continue assembling the engine, it was mounted on the bench and now you can watch the results of its first trial run. During engine's runs, I also make a few video thermograms, to understand engines working temperatures, this thermograms were added to the full video version.
Thank you for watching @crazyengines88 channel and have a nice day ! 
Наука
That was interesting mate. Looking forward to seeing what comes of it.
Thank you very much for your comment ! First task will be definition of the best glow plug set. I think, engine needs a bit more brake in time, as well.
The best engine stand to have is one that you can angle the stand on all angles, in this engines case you can see what happens to the cylinders when you rock the bench left to right, simulating a aircraft in motion..
I wacked a 15x8 prop on my gas powered fa120r3 and done a quick test run i achieved 7100rpm.but i didn't want to adjust my needle settings that are set for a 14x6 3 blade prop which develops 8200rpm..
Thank you very much for your comment ! I still thinking about construction of a new, more convenient and adoptive bench stand. Only need to find an exact place with enough space around. I'm still surprised, but that isn't so easy. Ideally, bench stand should be very near from workshop. You know, for sure, how much different and small tools you'll need around the engine.
@crazyengines88 yes i understand there is always some tool you may need..
I have a portable stand so i can take with me to a park or the airfield, so i can bench run the engines..but the latest engine was already in a plane..magnum fs91, i converted it to gas ,simply modified the groove in carburettor barrel..bit of tuning and add ignition system, its running reL well..amazingly it is revving to 9300rpm and when it was on glow would max at 8800rpm..
@@danielhitchens4407 Thank you very much for your reply ! Definitely, very interesting info regarding FS91 gas conversion. As far, as I understand, you decide not to jump over with Walbro style gas fuel carb, but modified your own, which comes with an engine. Is it possible to ask you to define exactly, what operations do you provided with FS91 carb ? It's amazingly interesting ! As I understand, the task was to adjust carb to another air/fuel ratio. For gas fuel it should be approx 1:14,7-15,1, for glow fuel approx. 1:4,5-5,5.
I think it is unlikely that the fuel distribution is linked to uneven heating, from what I noticed, you didn't check the point on the valve control, considering even that the glow plug is always heated, there could be an imbalance there.
Thank you very much for your comment ! I don't shut the moments of the valves adjusting for this video, to make it as short, as possible, I can grant you, that all valves has equal settings before this bench run. Anyhow, I'm very respect your opinion, so for the next test run will thoroughly check once again all valves clearances. I can imagine, that if the valves aren't set equally, the time period of the engine's working cycle will be also different and that could be the reason of longer or shorter combustion time.
Thank you and have a nice day ! Obrigado e tenha um bom dia!