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RE: Welcome to Club SAITO ! - 12/31/2012 5:50 PM   
lopflyers


 

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Status: online 		Happy New Year to all, happy landings

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RE: Welcome to Club SAITO ! - 12/31/2012 11:06 PM   
Old Fart


 

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Status: offline 		You too mate.

Still wondering about saito's quoted rpm figures for the fa30s-c engine.They list practical rpm range is 2500 to 22000.What gives there??

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RE: Welcome to Club SAITO ! - 1/1/2013 6:05 AM   
FNQFLYER


 

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Status: offline 		They are right the little 30 with steriods runs really hard but keep an eye on the valve springs and collets..  Any way I am back in FNQ, battled a lot of rain on the drive back but it was worth it.  With egards to the OS engines as my old mate would say if the price is good buy it and then convert it to a Saito (sell it for a profit) ASAP.
Any body had any fun with these digital servos.  I've just come across an a/c (ESM Swordfish) with 2 of these beasts in the tail At 2.75 oz per unit I wonder at the mentality of people.  Mind you the same person had a Saito 36 gas engine and installed an after market ignition unit on it from brand new and then scrapped it (sold for $200 with the old ignition unit as well) in favour of a Chinese "copy".  Only thing I am bothered about is the fact I missed out on the engine, dam and blast it.
Drinking Bundy and Colas out of the bottle feeling no pain but got to go in the "bosses" shop for the next week creating her new look, oh well
Catch ya guys and heres hoping for a great year in 013.

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RE: Welcome to Club SAITO ! - 1/1/2013 8:36 AM   
w8ye



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quote:

ORIGINAL: Old Fart

You too mate.

Still wondering about saito's quoted rpm figures for the fa30s-c engine.They list practical rpm range is 2500 to 22000.What gives there??


You will see half that with a 10-6

or all of it with a wheel?


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RE: Welcome to Club SAITO ! - 1/2/2013 2:05 AM   
mike early



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Status: offline 		When using SAI182TD34 (reverse direction camshaft) in a single cylinder Saito, is it timed the normal way, with both valves open at TDC?

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RE: Welcome to Club SAITO ! - 1/2/2013 7:31 AM   
FNQFLYER


 

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Status: offline 		Those figures on the Saito 30 are using baby props.  A lot like when we "found" the car version of te OS 26 fourstroke, unreal revs but on as I remember a 7 or 8 x 6 absolutely no use for OT competition.  Very expensive exesise in the end.

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RE: Welcome to Club SAITO ! - 1/2/2013 12:24 PM   
Old Fart


 

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Status: offline 		Hello barry and bruce plus dave you guys are flubbing us if that is the word.Quoted crankshaft revs are just that and was wondering how saito could get those sort of numbers with the valve gear we all know so well.The way the conventional saito valve gear works is no different to all other similar gear so why the double rev limit figures they quote??

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RE: Welcome to Club SAITO ! - 1/2/2013 9:15 PM   
Cougar429


 

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Status: offline 		I was wondering the same thing as conventional valve setups like this are likely to exhibit float at those RPM's.

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RE: Welcome to Club SAITO ! - 1/2/2013 11:00 PM  1 votes
Hobbsy



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Status: online 		Where did you get that info, Thanks

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RE: Welcome to Club SAITO ! - 1/2/2013 11:10 PM   
Cougar429


 

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Status: offline 		Hobbsy, who was your question aimed at?

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RE: Welcome to Club SAITO ! - 1/2/2013 11:23 PM  1 votes
Hobbsy



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RE: Welcome to Club SAITO ! - 1/2/2013 11:42 PM   
mike early



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RPM Range: 2000 - 12000


Has anyone reversed the rotation of a single cylinder Saito?

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RE: Welcome to Club SAITO ! - 1/3/2013 5:24 AM   
Ernie Misner



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Status: offline 		OS made a buggy engine a few years back as I recall (4-stroke). I saw the very same crazy rpm numbers advertised for that engine and wondered the same thing. Perhaps different valve springs?

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RE: Welcome to Club SAITO ! - 1/3/2013 8:25 AM   
FNQFLYER


 

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Status: offline 		Those hjigh revving 4 strokes were what we called grenades.  Likely to self destruct "eventually" sooner rather than later if operated in extremis.
Had one (OS) it hemoraged cubic dollars for no nett result except getting a number of guys hearts racing.  It required, as I rember, something like 40% nitro.  Likewise I have seen a Saito 30 fail in similar fashion only difference to OS was it was a "contained failure" and you are right it was the valve collets that let go (least wise that is what we think) resulting in the rest of the internals being destroyed.
Been there done that have the cap and am now preparing a 65 for the Easter Comp at Canowindra (NSW).  It will run in a Miss America in both Texaco and Duration with a prop and fuel type change as applicable.
AND I am going to run a ED racer 2.46 Diesel in a couple of other comps just to stir the boys up.
Cooler here than in other parts of the country today.  No cyclones on the horizon either   

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RE: Welcome to Club SAITO ! - 1/3/2013 9:45 AM  1 votes
The Raven



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Status: offline 		You can rarely believe the rev limits advertised for model aircraft engines.

As one example, look up the rev ranges for the 40LA versus the 46AX. Both have very similar rev ranges (16000rpm) but NEITHER will last long at the upper limit (assuming it *is* possible for a 40LA). The same applies for Saito and other manufacturers.

If you buy simply on advertised rpm ranges you got sucked in. Ditto for four strokes.

As for these quoted RPM ranges, rarely will the upper limit be achievable or practical.

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RE: Welcome to Club SAITO ! - 1/3/2013 11:07 AM   
w8ye



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quote:

ORIGINAL: mike early

http://www.horizonhobby.com/products/30s-aac-mm-SAIE030S#t2

RPM Range: 2000 - 12000


Has anyone reversed the rotation of a single cylinder Saito?


Some of them can be reversed. It requires a reversed cam. The secret is the rear cam of the inline twin 200Ti



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RE: Welcome to Club SAITO ! - 1/3/2013 11:58 AM   
barry wetherell


 

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Status: offline 		I reversed an OS FS40 last year, as a test, I rotated the cam inside out and swapped the intake and ex manifolds, it ran better than before, I don't know how long it will last, but my idea worked.
As for the Saito's you need to swap the push rods over, at man to get in touch with is Brian Winch ilyhand@bigpond.net.au">oilyhand@bigpond.net.au he will descibe the process better than I


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RE: Welcome to Club SAITO ! - 1/3/2013 1:12 PM   
w8ye



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ORIGINAL: barry wetherell

I reversed an OS FS40 last year, as a test, I rotated the cam inside out and swapped the intake and ex manifolds, it ran better than before, I don't know how long it will last, but my idea worked.
As for the Saito's you need to swap the push rods over, at man to get in touch with is Brian Winch ilyhand@bigpond.net.au">oilyhand@bigpond.net.au he will descibe the process better than I



Easier said than done.



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RE: Welcome to Club SAITO ! - 1/3/2013 10:19 PM   
FNQFLYER


 

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Status: offline 		Don't know about normal use but we have found reversal of 4 strokes as described above is fatal in the competition arena.  However that is not necessarily true whenn applied to Enya 4 strokes especially the 53 which used in a pusher configuration, pumped and with steriods (40%) has worked well to the point of winning club comps.  We never took it beyond that. 

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RE: Welcome to Club SAITO ! - 1/3/2013 10:22 PM   
FNQFLYER


 

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Status: offline 		Any way why bother, I am a believer of leaving things alone with regards to mechanicals in our 4 strokes, especially Saitos and YS engines.  Good power relative economy and reliable operation (to manufacturers specs, well almost) is what I am looking for. I prefer to buy the required power these days rather than try to build a new toy so to speak, lot easier on the pocket book etc  

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RE: Welcome to Club SAITO ! - 1/3/2013 11:21 PM   
mike early



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quote:

ORIGINAL: w8ye


quote:

ORIGINAL: mike early


Has anyone reversed the rotation of a single cylinder Saito?


Some of them can be reversed. It requires a reversed cam. The secret is the rear cam of the inline twin 200Ti





SAI182TD34 will reverse the direction in the 65-100 engines, My question is the timing on the cam during assembly. Can we assume it is the same?


P.S. The FA-56 is reversed by installing the SAI130T34 cam shaft.

Again, all the mid block engines, from the FA-65 up to and including the FA-100, are reversed using the SAI182TD34 cam.

All of the big block engines, the 120, 150, and 180, use the SAI300T34 cam to reverse the engine.

< Message edited by mike early -- 1/3/2013 11:50 PM >

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RE: Welcome to Club SAITO ! - 1/4/2013 12:46 AM   
Old Fart


 

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OF or anybody who knows, Thanks

Morning dave.It states the fa30s-c specs in the advertising brochure you get with any new saito engine.

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RE: Welcome to Club SAITO ! - 1/4/2013 1:27 AM  1 votes
Hobbsy



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Status: online 		That explains why I could not find anything online like that.

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RE: Welcome to Club SAITO ! - 1/4/2013 4:48 AM   
Ernie Misner



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Status: offline 		Interesting that Saito uses the same cam in many different size engines. Rather than opening further they must use larger valves in the bigger engines.

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RE: Welcome to Club SAITO ! - 1/4/2013 7:29 AM   
FNQFLYER


 

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Status: offline 		According to the people I met at Saito the original design of the cylinder was based on the P&W 1830 cylinder.  This has under gone many "upgrades " since the "early days".  Those upgrades have included, timing, valve size including retention and seat and seat material, changing from open to closed rockers being some of them.  As I understood it the engine was one under going continuous evolution.  

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