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Welcome to Club SAITO !

Old 03-28-2011, 09:23 PM
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Hello
I want to know about this A and B. At Horizon I don't see any A or B for Saito 72 or 82 engines website http://searchrc.horizonhobby.com/ind...ice%7c0&vno=72

But at Hobbywholesale website they have 72B and 82B engines http://www.hobbywholesale.com/catego...fgFilter=12440

can you please tell me which one is most latest engine and what are the difference between Saito 82 and Saito 82A and Saito 82B
Old 03-28-2011, 09:44 PM
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Default RE: Welcome to Club SAITO !

Horizon only has "B" engines for sale. http://www.horizonhobby.com/Products...rodID=SAIE082B
http://www.horizonhobby.com/Products...rodID=SAIE072B

The internal moving parts are the same on both the "A" and "B" engines

The "A" engine has a plastic back plate and the cam appears to set have above the crankcase in a separate cam box

The "B" engine has a aluminum back plate and the cam is down inside the crankcase with a flat cover.

Actually the cam is in the same position in both engines - it just appears different

You can put the aluminum back plate on a "A" engine but you will need some Retainer bolts for the carb from the 91 engine.

The cam pivot shaft on the "B" engine is longer than on the "A" engine.


Old 03-28-2011, 11:12 PM
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Default RE: Welcome to Club SAITO !

Okay, thanks for explain them so nicely. But can you tell me which one is newer model, A or B?
Old 03-29-2011, 12:11 AM
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Default RE: Welcome to Club SAITO !

The "B" version is the current,newer model.
Old 03-29-2011, 12:13 AM
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Default RE: Welcome to Club SAITO !

Thank you Craig 01
Old 03-29-2011, 12:32 AM
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Rajib,your welcome.When you get your Saito you will love it.They perform wonderfully are extremely reliable and sip fuel when properly adjusted,look terrific and have an awesome,unique sound about them.I especially love the throaty,burbling sound at slow idle.If you have heard one you will know what i'm talking about.
Old 03-29-2011, 06:15 AM
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Default RE: Welcome to Club SAITO !

Kostas1- I have changed the list to show you as member #706
Old 03-29-2011, 10:16 AM
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blw where I can see the list of all members?
Old 03-29-2011, 11:33 AM
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ORIGINAL: blw

Kostas1- I have changed the list to show you as member #706
What are the requirements for membership? I do own a Saito engine.

Gary
Old 03-29-2011, 11:34 AM
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I am sure many will think this a stupid question but here goes. How do keep from over reving when doing initial tune on high speed?

Gary
Old 03-29-2011, 12:00 PM
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Gary, the initial 10 minutes is to be done at 4,000 rpm with the throttle open 1/4 to 1/3 or what ever will maintain that 4,000 rpm. I don't concern myself with the HS needle until I run it at about 6,000 rpm. I run the engine for:
10 minutes @ 4,000,
10 minutes @ 5,000
10 minutes @ 6,000, lean HS needle so it will run without glow power, refill test tank
10 minutes @ 7,000, lean to peak, set LS needle and finish 2nd tank at various rpm 300 or 400 rpm rich of peak.. In 40 to 50 minutes you good to go.
Old 03-29-2011, 12:53 PM
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Hobbsy,

I didn't make myself clear, the engine [bought used] has been broken in and I just need to tune for the set up in my plane with my prop. I have done some initial test runs and at WOT it goes over the 11,500 limit.

Gary
Old 03-29-2011, 01:03 PM
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Roo Man,

To slow your RPM at full throttle use a higher pitch or larger diameter. Or a little of each.

What size is your engine and what prop are you using now?

jess
Old 03-29-2011, 02:05 PM
  #19789  
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Roo Man, you are member #728
Old 03-29-2011, 03:13 PM
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can anyone tell me the engine code for an FA80
ive got to look up the bearings.
Old 03-29-2011, 03:27 PM
  #19791  
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I have heard good things about this outfit, here is a link to FA-80 bearings:

http://www.rc-bearings.com/catalog/p...roducts_id=771

Or, they have ceramic ones:

http://www.rc-bearings.com/catalog/p...roducts_id=685

These are the plain steel, they also offer stainless and stainless/ceramic, check them out. Iam going to try them next time Ineed bearings.
Old 03-29-2011, 03:31 PM
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thanks
good prices [8D]

i ordered the stainless.
Old 03-29-2011, 03:47 PM
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Definitely good prices. Let me know if you try their bearings and they turn out to be good product. Like Isaid, Ican't personally vouch, but have heard others on this forum recommend them. I am thinking of getting a set for a Saito 65 I bought for my Sig Rascal 40. The FA-65 is basically new, but has been sitting up a while. They feel a little stiff/gritty and had old after-run oil dripping from them when Iopened the box and cleaned up the engine. But Idon't want to replace them if Idon't have to! I am going to run the engine a while and see how it turns out.
Old 03-29-2011, 03:54 PM
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i'll let you know how it turns out.
Old 03-29-2011, 04:14 PM
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Limiting RPM is easy these days, just wind back the servo travel for the throttle.  RPM is an interesting thing, every one has to go full throttle pedal to the metal but not always the best thing to do is it.
Try flyng Texaco for a while without any fancy mixes on the TX to see how good you are.
Changing prop size just substitutes one form of stress on the engine for another load due to a bigger or smaller prop than optimual can cause as much damage (long term) as running at peak RPM by leaning the engine out until it is pleading for mercy.  The difference is it takes a little less time
Using these engines is always a compromise,   Unless it is a competition engine find the engines "happy rpm" for the prop size that gives you the performance you require and stick with that.  Ideally it should punt the model around the circuit at about 3/4 throttle travel for the speed you require. Put another way it should be at about 80% of max RPM for that prop / fuel combination 
Old 03-29-2011, 11:16 PM
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Speedy,

do you have any prop/rpm measurements to post,
of your FA-150 ?
Old 03-30-2011, 02:55 AM
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Default RE: Welcome to Club SAITO !

G'day Saito people. I took my Saito 90R3 out for some air today in its purpose built Kadet Senior. I built the Senior to let the Saito get some air time in a non critical airframe that will fly with just about anything. My first flights a few months ago were not all that successful. I had run the engine in as it came out of the box but then I put a Keleo ring collector exhaust on it and when I flew it it would drop a cylinder. I debated fitting some sort of glow driver but I had not had problems with dropped cylinders before I fitted the exhaust so I removed it and reinstated the original exhaust stubs. It is much happier in its original state and although it did drop a cylinder when I was warming it up at one stage and again when I was trying to get a really low idle, it did not drop cylinders in flight despite still being slightly rich. Success.

I had two good long flights at high, mid and low throttle settings and will continue to fly it like this until it has a couple of hours under its belt. Then I may try the ring again. The sound of it idling after landing was worth the price of admission alone. Gorgeous.

Cheers

Mike in Oz

PS. Fuel was home brew 10% nitro, 5% castor, 15% Klotz plus methanol. Prop was a RAM 13 x 6 and the plugs are the original Saito plugs as supplied.
Old 03-30-2011, 03:34 AM
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Nice one mike i don't own a triple yet you lucky bugger!
Old 03-30-2011, 03:35 AM
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Or could you run 5% nitro or none?
Old 03-30-2011, 03:41 AM
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ORIGINAL: blw

Roo Man, you are member #728
Thanks

Gary

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