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Old Jan 09, 2013, 08:10 AM
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DarZeelon's Avatar
Israel, Ramat HaSharon
Joined Nov 2003
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Originally Posted by I TOBOR View Post
Dar, you left out one important aspect of living DownUnder, that is when you gain weight you get lighter.
And the the Aussies begin to float and fall off the planet???
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Old Jan 15, 2013, 10:57 PM
Cognito, Ergo Imbibo
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Morgan Hill, CA
Joined Sep 2007
305 Posts
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Originally Posted by Dale 813 View Post
Question. Saito 1.50 is the compression suppose to get stronger as the throttle goes higher? I can seem to start mine unless its at idle. I have a heavy duty starter and it won't turn it unless its at idle. Also. It shuts down abruptly at around 30% throttle ?? I edited this after doing some thinking. I have convinced myself that it must be rich. And I must be chasing needles.
When the throttle is closed or nearly closed, very little fuel/air mixture enters the cylinder. The effective compression ratio is much lower, so the engine is easier to turn.

If you think it's rich, try a couple of things to verify before you start turning needles...first, get it running (at 30% throttle if necessary). Take note of what happens when you un-hook the glow driver. If it is way rich, you'll notice an RPM drop when you take the driver off. Once you have the glow driver unhooked, try a pinch test on the fuel line. With it running as slow as you can get it, pinch off the fuel line. If it revs up before it dies, it is rich. You want it a little rich, so once it's adjusted correctly, it will rev up a small amount and then die. If it drops off without revving up, it is probably lean.

Keep in mind that on most of the Saito carbs, the idle screw and the high speed screw oppose each other...so one will affect the other. If it's way to rich at the high end, it will be rich at idle too. If you lean the high end, you'll need to re-visit the idle mixture.

On a just assembled carb, I would start at the high end, then work the idle. Part of setting the idle up well is getting it rich enough so that it will transition well to the high end. Too rich at idle and it will load up while you taxi out to the runway.

Dan
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Last edited by old_dan; Jan 15, 2013 at 10:58 PM. Reason: typo
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Old Jan 16, 2013, 09:37 AM
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I TOBOR's Avatar
Joined Feb 2007
2,549 Posts
Dan, I've said this before but, since the High Speed needle operates in a fixed seat, setting it first eliminates one variable. As you hinted at, setting the HS needle rich will only lead to chasing the LS needle all over the place. We see this quite often when someone says,"I messed with both needles to no avail." Everything works better with a plan. Willy nilly tweaking leads to great frustration.
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Old Jan 19, 2013, 07:15 AM
Living in the south of France
paulinfrance's Avatar
Joined Aug 2011
424 Posts
I ran my saito 90 Ts for the first time yesterday in my Fokker Eindecker, boy is she sweet,,,
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Old Jan 21, 2013, 09:14 PM
Hutch
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United States, Mt, Bozeman
Joined Jan 2012
298 Posts
Anyone have a 65 piston/cylinder just collecting dust?
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Old Jan 23, 2013, 11:20 AM
sKrude up, Rejected!
DogFly.'s Avatar
Joined Jun 2008
3,186 Posts
Hey guys,
I have a saito fg14b, I'm new to rc gas engines.
So I'm trying to figure out what size airframe will work with this plane.
I would like to get a Spitfire, would like to get an arf, I'm trying to figure out if this engine will power a 60 size spit ie: TF 60 Spit.
Can anybody help steer me in the right direction?
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Old Jan 23, 2013, 03:19 PM
Twistaholic AMA 134406
Dad_Roman's Avatar
USA, TX, Teague
Joined Jul 2007
5,211 Posts
Quote:
Originally Posted by hutchinstuff View Post
Anyone have a 65 piston/cylinder just collecting dust?
I went down this path about a year ago. Tried and tried to find a parts motors and thier just were'nt any to be had. Finally hooked up with and Aussie who had a torn up head and needed my broken bottom end. He was a nice guy so I sent mine to him so that at least ONE of us in the world could have a motor out of it.

Those were the last two broke 65's in the whole world....sorry





Quote:
Originally Posted by DogFly. View Post
Hey guys,
I have a saito fg14b, I'm new to rc gas engines.
So I'm trying to figure out what size airframe will work with this plane.
I would like to get a Spitfire, would like to get an arf, I'm trying to figure out if this engine will power a 60 size spit ie: TF 60 Spit.
Can anybody help steer me in the right direction?
Since that equates to an 84 sized engine....is that enough for you?

I would say it will do the job but your flights are liable to be VERY scale.

Its handicapped going on a fighter airframe and then being a 4 banger. My guess would be for a Saito you would want something closer to a 1.00 to 1.10 class motor which would set you in the 20-23 range on FG sizing.

.....but thats just me
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Old Jan 23, 2013, 03:47 PM
sKrude up, Rejected!
DogFly.'s Avatar
Joined Jun 2008
3,186 Posts
Thanks Dad_Roman,
I think I found the right plane!
It's the TF Spitfire IX Gold Edition, looks like my motor will fit this one just right.
And I'm part of the Saito engine club.
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Old Jan 23, 2013, 04:00 PM
I HATE GLOW PLUGS!
SrTelemaster's Avatar
United States, NY, St Lawrence
Joined Feb 2012
997 Posts
Quote:
Originally Posted by Dad_Roman View Post
I went down this path about a year ago. Tried and tried to find a parts motors and thier just were'nt any to be had. Finally hooked up with and Aussie who had a torn up head and needed my broken bottom end. He was a nice guy so I sent mine to him so that at least ONE of us in the world could have a motor out of it.

Those were the last two broke 65's in the whole world....sorry







Since that equates to an 84 sized engine....is that enough for you?

I would say it will do the job but your flights are liable to be VERY scale.

Its handicapped going on a fighter airframe and then being a 4 banger. My guess would be for a Saito you would want something closer to a 1.00 to 1.10 class motor which would set you in the 20-23 range on FG sizing.

.....but thats just me
The gas makes 15% less power as a rule, so it would run more like a 70 glow 4-stroke..
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Old Jan 23, 2013, 05:10 PM
sKrude up, Rejected!
DogFly.'s Avatar
Joined Jun 2008
3,186 Posts
Looks like I my try to build a kit plane, that's half the fun!

Top Flite Spitfire MK IX Gold Edition Kit TOPA0140

Requires:

4-6 Channel Radio w/5-7 Servos
1-Y-Harness for ailerons
1-Servo Extension for Ailerons
.61-.75 2-stroke or .70-.91 4-stroke engine

Looks like my Saito will work in this one.
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Last edited by DogFly.; Jan 23, 2013 at 05:37 PM.
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Old Jan 23, 2013, 05:30 PM
Twistaholic AMA 134406
Dad_Roman's Avatar
USA, TX, Teague
Joined Jul 2007
5,211 Posts
Quote:
Originally Posted by SrTelemaster View Post
The gas makes 15% less power as a rule, so it would run more like a 70 glow 4-stroke..
My point exactly. Then you put it on a fighter airframe, high wing loading, low aspect ratio, etc, etc.

Dogfly...welcome to the group. All we are saying is that it is fairly marginal. Does the kit say ok?...yes. But notice its the absolute very BOTTOM of the recomendation.

It will fly it. Just going to be scale like, no R/C airplane yankin and bankin, long rollouts on take off, no floating in on final, no flyin on the prop, and (if) when the wing stalls, it dies.

I actually enjoy and appreciate a scale type of flying, but Im also very aware of the limitations of this in our sport. Most seem to enjoy the availablity of extra power our sport can (easily) provide us.

Nice combo, I wish you the best and it should be fine. Keep us apprised
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Old Jan 23, 2013, 05:36 PM
sKrude up, Rejected!
DogFly.'s Avatar
Joined Jun 2008
3,186 Posts
Dad_Roman,
If you look at the specs:
70-.91 4-stroke engine
The FG14 is an 82 if I've been learning right, so that's right between a 70 -91.
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Old Jan 23, 2013, 05:40 PM
Twistaholic AMA 134406
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USA, TX, Teague
Joined Jul 2007
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Yes, of course your correct. Just used to most guys. When going 4 stroke they usually go with the upper end or bigger. (except me)
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Old Jan 23, 2013, 05:44 PM
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DogFly.'s Avatar
Joined Jun 2008
3,186 Posts
I think the 82 should work fine, not too fast, but not maxed out either.
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Old Jan 23, 2013, 05:49 PM
I HATE GLOW PLUGS!
SrTelemaster's Avatar
United States, NY, St Lawrence
Joined Feb 2012
997 Posts
Quote:
Originally Posted by Dad_Roman View Post
Yes, of course your correct. Just used to most guys. When going 4 stroke they usually go with the upper end or bigger. (except me)
Mines about as big as it needs to be.

A 1.80 CDI 4-stroke single that will spin an 18x8 @ 8850 & idle @ 1100.

Gets better fuel economy than a stock FA180 on GI.
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