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08-09-2015, 01:41 AM
Tried all this on my OS 70, and have it so that at idle after removing the igniter, the drop is barely perceptible. It will run like that for about a minute, it transitions beautifully too. But read above what it does after idling for a while. Wonder if the carb is gunked up, or is it because the tank may be too low? I do know my right wing had a healthy coating of goo on it, there was at least an 1/8th" of goo covering it front to back by the time I ran a tank through it.
To cold(i'm chicken)to ride the duke out east in the wheatbelt and felt cooped up so drove the car to a country pub that serves good steaks.On the way back got passed by a couple of hard core bikies and thought one of their bikes had a familiar paint job,looked at the rider and yup.It's freezing out side and this guy is wearing a pair of johnny reb boots,blue jeans,denim jacket with the sleeves cut off,open face helmet and shades.There were a couple of red splotches on his left bicep that looked like fresh gravel rash but no.It's the red infills on his tattoos the rest of this guy was blue,as the boss says it's hard to be staunch sometimes.
08-09-2015, 02:02 AM
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Acdc there's a lot of good answers here,since i can't improve on them lets jump outside the square a bit.Stop idling the engine for so long and just fly it.
To cold(i'm chicken)to ride the duke out east in the wheatbelt and felt cooped up so drove the car to a country pub that serves good steaks.On the way back got passed by a couple of hard core bikies and thought one of their bikes had a familiar paint job,looked at the rider and yup.It's freezing out side and this guy is wearing a pair of johnny reb boots,blue jeans,denim jacket with the sleeves cut off,open face helmet and shades.There were a couple of red splotches on his left bicep that looked like fresh gravel rash but no.It's the red infills on his tattoos the rest of this guy was blue,as the boss says it's hard to be staunch sometimes.
To cold(i'm chicken)to ride the duke out east in the wheatbelt and felt cooped up so drove the car to a country pub that serves good steaks.On the way back got passed by a couple of hard core bikies and thought one of their bikes had a familiar paint job,looked at the rider and yup.It's freezing out side and this guy is wearing a pair of johnny reb boots,blue jeans,denim jacket with the sleeves cut off,open face helmet and shades.There were a couple of red splotches on his left bicep that looked like fresh gravel rash but no.It's the red infills on his tattoos the rest of this guy was blue,as the boss says it's hard to be staunch sometimes.
08-09-2015, 08:24 AM
I took the carb off and took it apart and cleaned it. Interesting how they work, the LSN isnt a needle, its a sleeve the ride over the spray bar and covers it up so only a very small part of the slit is exposed at idle. There was some dirt in there, so hopefully thats all it needed to idle more than a few seconds.
EDIT: FIXED *happy dance* I pulled the carb, took it apart, sprayed it with brake cleaner, blew it out with canned air, reassembled it, put it back on. Turned the LSN out all the way(it is removed by screwing in once the barrel is removed), then screwed it in 4 1/2 turns. The HSN is out 2 turns. I got it started, noticed it dropped quite a bit when I pulled the igniter, but it stayed running, though really sloppy, so put the igniter back on, and turned in the LSN until it sped up, and when I pulled the igniter, no RPM drop. Thats it, done, did not touch the HSN, it idles down to 1500 RPM, and will not stop. Transitions are perfect. I had to pinch the fuel line to get it to quit, and had to adjust the idle in the radio down quite a bit, and it idles at 2200 RPM. Runs very good now. It must have had junk in the spray bar, there was junk in the barrel when I removed it.
EDIT: FIXED *happy dance* I pulled the carb, took it apart, sprayed it with brake cleaner, blew it out with canned air, reassembled it, put it back on. Turned the LSN out all the way(it is removed by screwing in once the barrel is removed), then screwed it in 4 1/2 turns. The HSN is out 2 turns. I got it started, noticed it dropped quite a bit when I pulled the igniter, but it stayed running, though really sloppy, so put the igniter back on, and turned in the LSN until it sped up, and when I pulled the igniter, no RPM drop. Thats it, done, did not touch the HSN, it idles down to 1500 RPM, and will not stop. Transitions are perfect. I had to pinch the fuel line to get it to quit, and had to adjust the idle in the radio down quite a bit, and it idles at 2200 RPM. Runs very good now. It must have had junk in the spray bar, there was junk in the barrel when I removed it.
Last edited by acdii; 08-09-2015 at 10:52 AM.
08-10-2015, 04:06 AM
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I took the carb off and took it apart and cleaned it. Interesting how they work, the LSN isnt a needle, its a sleeve the ride over the spray bar and covers it up so only a very small part of the slit is exposed at idle. There was some dirt in there, so hopefully thats all it needed to idle more than a few seconds.
EDIT: FIXED *happy dance* I pulled the carb, took it apart, sprayed it with brake cleaner, blew it out with canned air, reassembled it, put it back on. Turned the LSN out all the way(it is removed by screwing in once the barrel is removed), then screwed it in 4 1/2 turns. The HSN is out 2 turns. I got it started, noticed it dropped quite a bit when I pulled the igniter, but it stayed running, though really sloppy, so put the igniter back on, and turned in the LSN until it sped up, and when I pulled the igniter, no RPM drop. Thats it, done, did not touch the HSN, it idles down to 1500 RPM, and will not stop. Transitions are perfect. I had to pinch the fuel line to get it to quit, and had to adjust the idle in the radio down quite a bit, and it idles at 2200 RPM. Runs very good now. It must have had junk in the spray bar, there was junk in the barrel when I removed it.
EDIT: FIXED *happy dance* I pulled the carb, took it apart, sprayed it with brake cleaner, blew it out with canned air, reassembled it, put it back on. Turned the LSN out all the way(it is removed by screwing in once the barrel is removed), then screwed it in 4 1/2 turns. The HSN is out 2 turns. I got it started, noticed it dropped quite a bit when I pulled the igniter, but it stayed running, though really sloppy, so put the igniter back on, and turned in the LSN until it sped up, and when I pulled the igniter, no RPM drop. Thats it, done, did not touch the HSN, it idles down to 1500 RPM, and will not stop. Transitions are perfect. I had to pinch the fuel line to get it to quit, and had to adjust the idle in the radio down quite a bit, and it idles at 2200 RPM. Runs very good now. It must have had junk in the spray bar, there was junk in the barrel when I removed it.
Glad to hear you got it fixed!
I slowed the speed on my throttle servo down a bit for my .65. It seems to transition a lot better especially when I have to give it WOT after a botched approach.
I put 15 more flights on this Saito .65 this weekend. I am becoming a big fan of Saito 4 strokes. I am running a 13x8 prop and I love the sound it makes when the airplane rotates into flight, just awesome.. I love my OS 4 strokes too, but this .65 has been dialed in for 20 flights now and no adjustments.
Last edited by Bill Lowen; 08-10-2015 at 04:11 AM.
08-10-2015, 05:27 AM
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LOL. nah, I have a 52 surpass and a 56a. I love them both, but I will tell you, I am planning a warbird project over the winter and I think that 3 cylinder Saito might be included in those plans.
08-10-2015, 10:02 AM
Funny how he tells the story. It's hot and humid right now and I'm freezing after reading that!
08-10-2015, 10:04 AM
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Thats the one I have on my .40 size Deacathlon. I am real close to putting it in the air so my experience is more with the 52 right now. But I am glad to meet somebody with one so we can share notes. Maybe we should move this over to an OS forum.. don't want to upset the Saito purists! 
08-10-2015, 10:34 AM
Nah, Those of us with OS that are here are now Saito fans! I have 4 Saitos, and 2 OS. (not mentioning the 3 Magnum 91's) OOPS I did. Two are still new in boxes too, third one is in a mucked up chipmunk that had 2 flights before the aforementioned Magnum quit in flight. Two Saitos are in flying planes and run perfectly, have another FA-100 and FA125, neither have been spun up yet, but both have homes.
08-11-2015, 12:39 AM
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I have a asp 91 4 stroke and its been fantastic while the plane it was in lasted (oops ) . Because the price gap is narrowing with the better brands ( hobbyking )I dont think I'll get any more of those . As for os 4strokes I have a 70, 52 and a unrun 30 and those have been faultless . To me there not better or worse than satios just different . Cheers the pope
08-11-2015, 04:02 AM
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My cousin in western Pa. passed this OS .91 Surpass along to me, it's a strong .91 turning a Bolly 13.5x8 at 9,800 on 10% fuel. I ran 8 oz with a Fox Miracle and 8 oz with an OS-f. There is not one iota of difference in the performance.The idle was a perfect 1,800 with both. I am swapping it even up for a 1.20.
08-11-2015, 04:36 AM
Popey you know damn well asp stands for accidental sexual premonition and i think you've just had one
Bill i have a radial for a t6/harvard but have not put it together yet,the engine's had a good workout tho.
Bill i have a radial for a t6/harvard but have not put it together yet,the engine's had a good workout tho.
08-11-2015, 08:50 AM
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Old Fart, these Yanks don't understand that it is just a move down the coast from Cairns to Brisbane.* The best part about it if there is any with this sort of thing is that my old mate and I will get "The Olde Firm" up and running and already we are getting sledging from the other people who compete in Scale racing and O/T.* That is the ver big plus.* And I will get to use (well maybe) those bikes he has acquired.* Down side, the days here are 25 to 28 degrees c with the o/ nite at around 18 to 20 degrees c.* In Brisbane subtract at least 5 from theabove figures.
But we'll survive,
But we'll survive,
08-11-2015, 09:04 AM
I have Run the Magnum .91 fs, and for the money, its not a bad motor. It is a tad low on the horsepower when put up against the O.S. and Saito's, but you can get 2 magnums for the price of one Saito. So if budget is not a problem, go for the best. But I would have no fear in buying another magnum four stroke. I have an O.S. .91 surpass and 2 Saito 2.20s right now. I am going to list one of the saito 2.20s on the buy/sell area today. One season old, just over a gallon of fuel (YS 20/20) thru it. Clean and in the box. Just a way to get the $$$ for the 1/3 scale Fokker budget going.
08-11-2015, 11:50 AM
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28/5 = 5.6 x 9 = 50.04 + 32 = 82.04. I did that all in my head. Can anyone check it W/a calculator?
Last edited by SrTelemaster150; 08-11-2015 at 11:52 AM.
08-11-2015, 12:17 PM
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The rain let up and the wind died down last night around 6:30. Absolutely perfect flying night. I was anxious to try out a new 12X8 APC prop on the .65. I turned on the switch, the servos flipped on, then off. then nothing. Somehow I burned up a brand new Spektrum receiver. bummer.. Got out the electrics so the night was not a complete waste, but still they are not the same as the nitro roar of a 4 stroke.
Not sure how you burn up a receiver using analog servos and a NIMH 6 volt pack but oh well.
Not sure how you burn up a receiver using analog servos and a NIMH 6 volt pack but oh well.
08-11-2015, 01:40 PM
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Snr Tele you got the temps right, you must be an old "aviation man" methinks. Any way concerning temperature, I sure wish we could experience some of this global warming ever one is rabbiting on about, and in the mean time I am going to us one of my old farts perks (pensioner benefits) and am going to take a "free" train trip to Cairns for a week, next week. Have gone there by air (to many times to count) by car (likewise) by boat (once) and now by train. It will take 24 hours. Should prove interesting. On a/c engines, the "boss" is away for a few days, the next door neighbors dogs are in constant bark mode so I feel a day of engine running and tuning is called for, maybe 2 if I "can't" get them running right. Catch ya
08-11-2015, 01:44 PM
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Bill, on the spectrum receiver, what battery source and power do you use. My old mate learnt the expensive way that LiPo batteries supplying power to R/x's have to be very closely monitored and the regulators checked to ensure that they are within the prescribed power range. Me in use BIG Nimh's (3000ma +) and usually a couple of them in big models and have been even known to use as little as 400ma Nimh's in some of the O/t models