Saito 200Ti RPM, props, fuel?
 

My Saito 200Ti is taking a long time to break in. The best prop I've tried so far is a MA classic 16x10 and all I'm getting is around 8500 RPM on 15% Omega. Since its mounted on a warbird I am looking for a good mix of power and speed.

Has anybody tried 25% Omega or 30% Heli fuel in this motor?

How about some prop/RPM readings?

RE: Saito 200Ti RPM, props, fuel?
 

I don't oun this Saito but I think I would try a APC 18X8. Below 9000 rpm it would give scale flight speed and good pull thru large loops and rolls keeping the top level speed to around 70 MPH when unloaded. Peronally I would stay with the 15% nitro for now and see how it does. Take your time with break in and the engine will last longer. Typically Saitos require several gallons to reach peak performance and lowest idle but are very flyable after about a gallon. My little 91 has well over 5 cases and runs really well. Never run it lean and keep an eye on the individual cylinder head temps as Will Robinson will tell you and it should last many hours. Keep us posted, that engine looks KOOL!

RE: Saito 200Ti RPM, props, fuel?
 

The motor has a couple of gallons of fuel through it but it is still on the break-in curve and runs noticably better each time I take the plane out. I've broken in two Saito 100's so I know it takes a while, but this 200Ti seems to be taking much longer than the singles do for some reason.

I started with an APC 18x6. Peak RPM on the ground was only 8000 RPM and it did not seem to unload in flight at all. In fact it seemed to "load up" and slow down during turns and when I pointed the nose up. After several scary flights this way I tried an APC 17x8. This prop gave a little more RPM, better flight speed and good enough performance to pull through loops OK. But it still did not pull the plane along with authority.

The MA 16x10 gives similar performance to the 17x8 with a little more speed which feels/seems more natural for the warbird (H9 150 P51 Mustang). But as I said earlier peak RPM on the ground is only 8500.

I am running on-board glow and even with this turned off there is no longer a tendency to drop a cylinder. The idle is perfect. I've adjusted the valves, tried different plugs etc with no noticable difference in top-end performance. But it does seem to run a bit stronger eact time I take it to the field, so I am not absolutely convinced that there is something wrong with it. My plan is to put another couple of gallons of 15% through it and see what happens. And if peak RPMs don't reach toward 9000 with the small prop I will then send it to Horizon to see what they have to say.

Anyone else with this motor please post!

RE: Saito 200Ti RPM, props, fuel?
 

Here's some tach numbers with various props.

All Saito 200Ti – 15% Cool Power
Peak RPM with 5” Spinner disc

16x8 APC 8650 13 lbs 12 oz
16x8 Menz 8700 13 lbs 7 oz
16x8 MA Scimitar 8600 12 lbs 4 oz
16x8 Pro Zinger 8500 11 lbs 10 oz

16x10 MA Classic 8700 12 lbs 6 oz

17x8 Menz 8100 13 lbs 6 oz
17x8 APC 8300 13 lbs 12 oz
17x8 MA Scimitar 8300 13 lbs 15 oz

18x6 MA Classic 8400 15 lbs 2 oz

18x8 Menz 7400 14 lbs 8 oz
18x8 MA Scimitar 7600 13 lbs 10 oz

RE: Saito 200Ti RPM, props, fuel?
 

Here's an update on my 200Ti. After a couple more gallons of fuel I am now getting an honest on-the-ground reading of 9000 RPM with the MA Classic 16x10 and 30% heli fuel.

I'm still not convinced that the engine is fully broken in yet. But it is running sooo much better.

I'll try a tank of 15% again and see if there is a noticeable difference.

Walt

RE: Saito 200Ti RPM, props, fuel?
 

I am running a 3 blade bolly with 5 inch spinner 17.5 x 10 started out only 6200 rpm was very concerned
it is now at 8300rpm after 2gallons of 5% fuel

RE: Saito 200Ti RPM, props, fuel?
 

I have also found that this motor takes for ever to run in , but have it in a 120 Ultra Stick Lite and find APC
16x14 and 17x12 pattern props to be the best option. It staggers around the sky on a MA 18x6.

RE: Saito 200Ti RPM, props, fuel?
 

Bill Yonescu,

do you have any pictures from your FA-200Ti ;

RE: Saito 200Ti RPM, props, fuel?
 

Photo as requested Kostas1

All the best
James

RE: Saito 200Ti RPM, props, fuel?
 

Oh dear James.....i am so jealous .... {in a good way....}

So so nice design....http://www.veryicon.com/icon/preview...ndy%20Icon.jpg

I know this is older but wanted to provide my feedback on my results.

30% heli
16x10 =8000 rpm
17x8= 8500 rpm

I have this engine in a version 1 H9 P-51 150 and it flies great with the 17x8 at a few clicks over 1/2 throttle. Will try a 16x10 as suggested above later.

Mine will go i to a WWI Bristol Fighter F2B turning a 16 x 10 prop.

Guys it is hard to prime my 200ti. I pretty much have to squirt some fuel in the carb and it start right up and runs like a champ after that. Getting fuel to the carb the normal way does not work. Any suggestion?

I know you said your engine runs well once started, but check your O-Rings on your Carb and Intake Manifolds, one of them may leak a bit when the engine is not so warm

Jim

Ok thanks for the input.

I converted my FA-200Ti to CDI with glow fuel.

I'm getting 8000 RPM with a Dynathrust 18 X 8.

Fuel economy improved 70% over glow ignition with the same 15% Cool Power glow fuel.

I'm only burning a smidgeon over 1 oz of 15% Cool Power glow fuel per minute at WOT with CDI.

With glow ignition I was burning over 1.7 oz of 15% Cool Power per minute at WOT.

that makes me want to convert my FA115 for my P-40, but the smaller 115 will most likely not save as much fuel

Jim

ooops

The FA-200Ti has a horrible intake distribution imbalance. That us why the fuel economy improved so drastically.

Normal improvement is in the neighborhood of 20-25%.

CDI on a Saito single cylinder will improve user friendliness exponentially.